hg4j: src/org/tmatesoft/hg/internal/DataAccessProvider.java annotate

annotate src/org/tmatesoft/hg/internal/DataAccessProvider.java @ 610:5c68567b3645

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author	Artem Tikhomirov <tikhomirov.artem@gmail.com>
date	Thu, 09 May 2013 21:06:48 +0200
parents	e1b29756f901
children	65c01508f002

rev	line source
10 382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	1 /*
584 ed243b668502 Conditionally enable effective patch merge alternative for revlog reading Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 538 diff changeset	2 * Copyright (c) 2010-2013 TMate Software Ltd
74 6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 27 diff changeset	3 *
6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 27 diff changeset	4 * This program is free software; you can redistribute it and/or modify
6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 27 diff changeset	5 * it under the terms of the GNU General Public License as published by
6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 27 diff changeset	6 * the Free Software Foundation; version 2 of the License.
6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 27 diff changeset	7 *
6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 27 diff changeset	8 * This program is distributed in the hope that it will be useful,
6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 27 diff changeset	9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 27 diff changeset	10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 27 diff changeset	11 * GNU General Public License for more details.
6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 27 diff changeset	12 *
6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 27 diff changeset	13 * For information on how to redistribute this software under
6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 27 diff changeset	14 * the terms of a license other than GNU General Public License
102 a3a2e5deb320 Updated contact address to support@hg4j.com Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 74 diff changeset	15 * contact TMate Software at support@hg4j.com
10 382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	16 */
74 6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 27 diff changeset	17 package org.tmatesoft.hg.internal;
10 382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	18
456 909306e412e2 Refactor LogFacility and SessionContext, better API for both Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 440 diff changeset	19 import static org.tmatesoft.hg.util.LogFacility.Severity.Error;
909306e412e2 Refactor LogFacility and SessionContext, better API for both Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 440 diff changeset	20 import static org.tmatesoft.hg.util.LogFacility.Severity.Warn;
909306e412e2 Refactor LogFacility and SessionContext, better API for both Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 440 diff changeset	21
10 382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	22 import java.io.File;
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	23 import java.io.FileInputStream;
534 243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	24 import java.io.FileNotFoundException;
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	25 import java.io.FileOutputStream;
10 382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	26 import java.io.IOException;
534 243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	27 import java.io.OutputStream;
10 382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	28 import java.nio.ByteBuffer;
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	29 import java.nio.MappedByteBuffer;
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	30 import java.nio.channels.FileChannel;
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	31
295 981f9f50bb6c Issue 11: Error log facility. SessionContext to share common facilities Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 158 diff changeset	32 import org.tmatesoft.hg.core.SessionContext;
425 48f993aa2f41 FIXMEs: exceptions, javadoc Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 420 diff changeset	33 import org.tmatesoft.hg.util.LogFacility;
158 b413b16d10a5 Integer offsets and file length explictly, rather than casts throughout code. Inflater may benefit from total length hint, but shall calculate it by its own if needed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 157 diff changeset	34
10 382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	35 /**
74 6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 27 diff changeset	36 *
6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 27 diff changeset	37 * @author Artem Tikhomirov
6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 27 diff changeset	38 * @author TMate Software Ltd.
10 382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	39 */
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	40 public class DataAccessProvider {
338 3cfa4d908fc9 Add options to control DataAccessProvider, allow to turn off use of file memory mapping in particular to solve potential sharing violation (os file handle gets released on MappedByteByffer being GC'd, not on FileChannel.close()) Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 295 diff changeset	41 /**
3cfa4d908fc9 Add options to control DataAccessProvider, allow to turn off use of file memory mapping in particular to solve potential sharing violation (os file handle gets released on MappedByteByffer being GC'd, not on FileChannel.close()) Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 295 diff changeset	42 * Boundary to start using file memory mapping instead of regular file access, in bytes.
3cfa4d908fc9 Add options to control DataAccessProvider, allow to turn off use of file memory mapping in particular to solve potential sharing violation (os file handle gets released on MappedByteByffer being GC'd, not on FileChannel.close()) Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 295 diff changeset	43 * Set to 0 to indicate mapping files into memory shall not be used.
3cfa4d908fc9 Add options to control DataAccessProvider, allow to turn off use of file memory mapping in particular to solve potential sharing violation (os file handle gets released on MappedByteByffer being GC'd, not on FileChannel.close()) Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 295 diff changeset	44 * If set to -1, file of any size would be mapped in memory.
3cfa4d908fc9 Add options to control DataAccessProvider, allow to turn off use of file memory mapping in particular to solve potential sharing violation (os file handle gets released on MappedByteByffer being GC'd, not on FileChannel.close()) Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 295 diff changeset	45 */
3cfa4d908fc9 Add options to control DataAccessProvider, allow to turn off use of file memory mapping in particular to solve potential sharing violation (os file handle gets released on MappedByteByffer being GC'd, not on FileChannel.close()) Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 295 diff changeset	46 public static final String CFG_PROPERTY_MAPIO_LIMIT = "hg4j.dap.mapio_limit";
3cfa4d908fc9 Add options to control DataAccessProvider, allow to turn off use of file memory mapping in particular to solve potential sharing violation (os file handle gets released on MappedByteByffer being GC'd, not on FileChannel.close()) Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 295 diff changeset	47 public static final String CFG_PROPERTY_MAPIO_BUFFER_SIZE = "hg4j.dap.mapio_buffer";
3cfa4d908fc9 Add options to control DataAccessProvider, allow to turn off use of file memory mapping in particular to solve potential sharing violation (os file handle gets released on MappedByteByffer being GC'd, not on FileChannel.close()) Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 295 diff changeset	48 public static final String CFG_PROPERTY_FILE_BUFFER_SIZE = "hg4j.dap.file_buffer";
425 48f993aa2f41 FIXMEs: exceptions, javadoc Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 420 diff changeset	49
48f993aa2f41 FIXMEs: exceptions, javadoc Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 420 diff changeset	50 private static final int DEFAULT_MAPIO_LIMIT = 100 * 1024; // 100 kB
48f993aa2f41 FIXMEs: exceptions, javadoc Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 420 diff changeset	51 private static final int DEFAULT_FILE_BUFFER = 8 * 1024; // 8 kB
48f993aa2f41 FIXMEs: exceptions, javadoc Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 420 diff changeset	52 private static final int DEFAULT_MAPIO_BUFFER = DEFAULT_MAPIO_LIMIT; // same as default boundary
10 382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	53
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	54 private final int mapioMagicBoundary;
456 909306e412e2 Refactor LogFacility and SessionContext, better API for both Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 440 diff changeset	55 private final int bufferSize, mapioBufSize;
295 981f9f50bb6c Issue 11: Error log facility. SessionContext to share common facilities Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 158 diff changeset	56 private final SessionContext context;
584 ed243b668502 Conditionally enable effective patch merge alternative for revlog reading Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 538 diff changeset	57
295 981f9f50bb6c Issue 11: Error log facility. SessionContext to share common facilities Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 158 diff changeset	58 public DataAccessProvider(SessionContext ctx) {
456 909306e412e2 Refactor LogFacility and SessionContext, better API for both Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 440 diff changeset	59 context = ctx;
909306e412e2 Refactor LogFacility and SessionContext, better API for both Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 440 diff changeset	60 PropertyMarshal pm = new PropertyMarshal(ctx);
494 2743641f2f12 Defect: use of 0 as configuration value for mapio boundary results in every file being memmap-ed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 456 diff changeset	61 mapioMagicBoundary = mapioBoundaryValue(pm.getInt(CFG_PROPERTY_MAPIO_LIMIT, DEFAULT_MAPIO_LIMIT));
456 909306e412e2 Refactor LogFacility and SessionContext, better API for both Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 440 diff changeset	62 bufferSize = pm.getInt(CFG_PROPERTY_FILE_BUFFER_SIZE, DEFAULT_FILE_BUFFER);
909306e412e2 Refactor LogFacility and SessionContext, better API for both Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 440 diff changeset	63 mapioBufSize = pm.getInt(CFG_PROPERTY_MAPIO_BUFFER_SIZE, DEFAULT_MAPIO_BUFFER);
338 3cfa4d908fc9 Add options to control DataAccessProvider, allow to turn off use of file memory mapping in particular to solve potential sharing violation (os file handle gets released on MappedByteByffer being GC'd, not on FileChannel.close()) Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 295 diff changeset	64 }
3cfa4d908fc9 Add options to control DataAccessProvider, allow to turn off use of file memory mapping in particular to solve potential sharing violation (os file handle gets released on MappedByteByffer being GC'd, not on FileChannel.close()) Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 295 diff changeset	65
456 909306e412e2 Refactor LogFacility and SessionContext, better API for both Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 440 diff changeset	66 public DataAccessProvider(SessionContext ctx, int mapioBoundary, int regularBufferSize, int mapioBufferSize) {
295 981f9f50bb6c Issue 11: Error log facility. SessionContext to share common facilities Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 158 diff changeset	67 context = ctx;
494 2743641f2f12 Defect: use of 0 as configuration value for mapio boundary results in every file being memmap-ed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 456 diff changeset	68 mapioMagicBoundary = mapioBoundaryValue(mapioBoundary);
27 b0a15cefdfd6 Cons args instead of fixed consts Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 26 diff changeset	69 bufferSize = regularBufferSize;
456 909306e412e2 Refactor LogFacility and SessionContext, better API for both Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 440 diff changeset	70 mapioBufSize = mapioBufferSize;
584 ed243b668502 Conditionally enable effective patch merge alternative for revlog reading Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 538 diff changeset	71 }
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 538 diff changeset	72
494 2743641f2f12 Defect: use of 0 as configuration value for mapio boundary results in every file being memmap-ed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 456 diff changeset	73 // ensure contract of CFG_PROPERTY_MAPIO_LIMIT, for mapioBoundary == 0 use MAX_VALUE so that no file is memmap-ed
2743641f2f12 Defect: use of 0 as configuration value for mapio boundary results in every file being memmap-ed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 456 diff changeset	74 private static int mapioBoundaryValue(int mapioBoundary) {
2743641f2f12 Defect: use of 0 as configuration value for mapio boundary results in every file being memmap-ed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 456 diff changeset	75 return mapioBoundary == 0 ? Integer.MAX_VALUE : mapioBoundary;
2743641f2f12 Defect: use of 0 as configuration value for mapio boundary results in every file being memmap-ed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 456 diff changeset	76 }
2743641f2f12 Defect: use of 0 as configuration value for mapio boundary results in every file being memmap-ed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 456 diff changeset	77
606 5daa42067e7c Avoid mmap files when only few bytes are to be read Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 584 diff changeset	78 public DataAccess createReader(File f, boolean shortRead) {
10 382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	79 if (!f.exists()) {
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	80 return new DataAccess();
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	81 }
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	82 try {
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	83 FileChannel fc = new FileInputStream(f).getChannel();
420 6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	84 long flen = fc.size();
606 5daa42067e7c Avoid mmap files when only few bytes are to be read Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 584 diff changeset	85 if (!shortRead && flen > mapioMagicBoundary) {
26 71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	86 // TESTS: bufLen of 1024 was used to test MemMapFileAccess
425 48f993aa2f41 FIXMEs: exceptions, javadoc Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 420 diff changeset	87 return new MemoryMapFileAccess(fc, flen, mapioBufSize, context.getLog());
10 382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	88 } else {
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	89 // XXX once implementation is more or less stable,
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	90 // may want to try ByteBuffer.allocateDirect() to see
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	91 // if there's any performance gain.
338 3cfa4d908fc9 Add options to control DataAccessProvider, allow to turn off use of file memory mapping in particular to solve potential sharing violation (os file handle gets released on MappedByteByffer being GC'd, not on FileChannel.close()) Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 295 diff changeset	92 boolean useDirectBuffer = false; // XXX might be another config option
158 b413b16d10a5 Integer offsets and file length explictly, rather than casts throughout code. Inflater may benefit from total length hint, but shall calculate it by its own if needed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 157 diff changeset	93 // TESTS: bufferSize of 100 was used to check buffer underflow states when readBytes reads chunks bigger than bufSize
425 48f993aa2f41 FIXMEs: exceptions, javadoc Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 420 diff changeset	94 return new FileAccess(fc, flen, bufferSize, useDirectBuffer, context.getLog());
10 382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	95 }
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	96 } catch (IOException ex) {
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	97 // unlikely to happen, we've made sure file exists.
456 909306e412e2 Refactor LogFacility and SessionContext, better API for both Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 440 diff changeset	98 context.getLog().dump(getClass(), Error, ex, null);
10 382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	99 }
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	100 return new DataAccess(); // non-null, empty.
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	101 }
534 243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	102
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	103 public DataSerializer createWriter(File f, boolean createNewIfDoesntExist) {
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	104 if (!f.exists() && !createNewIfDoesntExist) {
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	105 return new DataSerializer();
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	106 }
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	107 try {
538 dd4f6311af52 Commit: first working version Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 534 diff changeset	108 return new StreamDataSerializer(context.getLog(), new FileOutputStream(f, true));
534 243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	109 } catch (final FileNotFoundException ex) {
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	110 context.getLog().dump(getClass(), Error, ex, null);
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	111 return new DataSerializer() {
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	112 public void write(byte[] data, int offset, int length) throws IOException {
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	113 throw ex;
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	114 }
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	115 };
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	116 }
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	117 }
10 382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	118
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	119 private static class MemoryMapFileAccess extends DataAccess {
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	120 private FileChannel fileChannel;
425 48f993aa2f41 FIXMEs: exceptions, javadoc Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 420 diff changeset	121 private long position = 0; // always points to buffer's absolute position in the file
48f993aa2f41 FIXMEs: exceptions, javadoc Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 420 diff changeset	122 private MappedByteBuffer buffer;
420 6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	123 private final long size;
26 71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	124 private final int memBufferSize;
425 48f993aa2f41 FIXMEs: exceptions, javadoc Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 420 diff changeset	125 private final LogFacility logFacility;
10 382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	126
425 48f993aa2f41 FIXMEs: exceptions, javadoc Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 420 diff changeset	127 public MemoryMapFileAccess(FileChannel fc, long channelSize, int bufferSize, LogFacility log) {
10 382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	128 fileChannel = fc;
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	129 size = channelSize;
425 48f993aa2f41 FIXMEs: exceptions, javadoc Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 420 diff changeset	130 logFacility = log;
420 6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	131 memBufferSize = bufferSize > channelSize ? (int) channelSize : bufferSize; // no reason to waste memory more than there's data
10 382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	132 }
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	133
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	134 @Override
26 71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	135 public boolean isEmpty() {
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	136 return position + (buffer == null ? 0 : buffer.position()) >= size;
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	137 }
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	138
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	139 @Override
420 6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	140 public DataAccess reset() throws IOException {
6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	141 longSeek(0);
6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	142 return this;
6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	143 }
6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	144
6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	145 @Override
158 b413b16d10a5 Integer offsets and file length explictly, rather than casts throughout code. Inflater may benefit from total length hint, but shall calculate it by its own if needed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 157 diff changeset	146 public int length() {
420 6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	147 return Internals.ltoi(longLength());
6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	148 }
6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	149
6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	150 @Override
6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	151 public long longLength() {
51 9429c7bd1920 Try DataAccess to reach revision data instead of plain byte arrays Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 27 diff changeset	152 return size;
9429c7bd1920 Try DataAccess to reach revision data instead of plain byte arrays Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 27 diff changeset	153 }
9429c7bd1920 Try DataAccess to reach revision data instead of plain byte arrays Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 27 diff changeset	154
9429c7bd1920 Try DataAccess to reach revision data instead of plain byte arrays Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 27 diff changeset	155 @Override
420 6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	156 public void longSeek(long offset) {
26 71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	157 assert offset >= 0;
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	158 // offset may not necessarily be further than current position in the file (e.g. rewind)
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	159 if (buffer != null && /offset is within buffer/ offset >= position && (offset - position) < buffer.limit()) {
420 6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	160 // cast is ok according to check above
6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	161 buffer.position(Internals.ltoi(offset - position));
26 71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	162 } else {
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	163 position = offset;
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	164 buffer = null;
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	165 }
10 382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	166 }
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	167
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	168 @Override
420 6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	169 public void seek(int offset) {
6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	170 longSeek(offset);
6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	171 }
6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	172
6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	173 @Override
10 382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	174 public void skip(int bytes) throws IOException {
26 71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	175 assert bytes >= 0;
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	176 if (buffer == null) {
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	177 position += bytes;
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	178 return;
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	179 }
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	180 if (buffer.remaining() > bytes) {
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	181 buffer.position(buffer.position() + bytes);
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	182 } else {
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	183 position += buffer.position() + bytes;
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	184 buffer = null;
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	185 }
10 382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	186 }
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	187
26 71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	188 private void fill() throws IOException {
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	189 if (buffer != null) {
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	190 position += buffer.position();
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	191 }
10 382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	192 long left = size - position;
440 299870249a28 Issue 30: bogus IOException for mmap file on linux Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 425 diff changeset	193 for (int i = 0; i < 3; i++) {
299870249a28 Issue 30: bogus IOException for mmap file on linux Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 425 diff changeset	194 try {
299870249a28 Issue 30: bogus IOException for mmap file on linux Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 425 diff changeset	195 buffer = fileChannel.map(FileChannel.MapMode.READ_ONLY, position, left < memBufferSize ? left : memBufferSize);
299870249a28 Issue 30: bogus IOException for mmap file on linux Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 425 diff changeset	196 return;
299870249a28 Issue 30: bogus IOException for mmap file on linux Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 425 diff changeset	197 } catch (IOException ex) {
299870249a28 Issue 30: bogus IOException for mmap file on linux Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 425 diff changeset	198 if (i == 2) {
299870249a28 Issue 30: bogus IOException for mmap file on linux Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 425 diff changeset	199 throw ex;
299870249a28 Issue 30: bogus IOException for mmap file on linux Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 425 diff changeset	200 }
299870249a28 Issue 30: bogus IOException for mmap file on linux Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 425 diff changeset	201 if (i == 0) {
299870249a28 Issue 30: bogus IOException for mmap file on linux Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 425 diff changeset	202 // if first attempt failed, try to free some virtual memory, see Issue 30 for details
456 909306e412e2 Refactor LogFacility and SessionContext, better API for both Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 440 diff changeset	203 logFacility.dump(getClass(), Warn, ex, "Memory-map failed, gonna try gc() to free virtual memory");
440 299870249a28 Issue 30: bogus IOException for mmap file on linux Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 425 diff changeset	204 }
299870249a28 Issue 30: bogus IOException for mmap file on linux Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 425 diff changeset	205 try {
299870249a28 Issue 30: bogus IOException for mmap file on linux Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 425 diff changeset	206 buffer = null;
299870249a28 Issue 30: bogus IOException for mmap file on linux Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 425 diff changeset	207 System.gc();
299870249a28 Issue 30: bogus IOException for mmap file on linux Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 425 diff changeset	208 Thread.sleep((1+i) * 1000);
299870249a28 Issue 30: bogus IOException for mmap file on linux Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 425 diff changeset	209 } catch (Throwable t) {
456 909306e412e2 Refactor LogFacility and SessionContext, better API for both Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 440 diff changeset	210 logFacility.dump(getClass(), Error, t, "Bad luck");
440 299870249a28 Issue 30: bogus IOException for mmap file on linux Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 425 diff changeset	211 }
299870249a28 Issue 30: bogus IOException for mmap file on linux Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 425 diff changeset	212 }
299870249a28 Issue 30: bogus IOException for mmap file on linux Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 425 diff changeset	213 }
26 71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	214 }
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	215
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	216 @Override
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	217 public void readBytes(byte[] buf, int offset, int length) throws IOException {
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	218 if (buffer == null \|\| !buffer.hasRemaining()) {
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	219 fill();
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	220 }
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	221 // XXX in fact, we may try to create a MappedByteBuffer of exactly length size here, and read right away
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	222 while (length > 0) {
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	223 int tail = buffer.remaining();
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	224 if (tail == 0) {
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	225 throw new IOException();
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	226 }
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	227 if (tail >= length) {
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	228 buffer.get(buf, offset, length);
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	229 } else {
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	230 buffer.get(buf, offset, tail);
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	231 fill();
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	232 }
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	233 offset += tail;
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	234 length -= tail;
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	235 }
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	236 }
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	237
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	238 @Override
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	239 public byte readByte() throws IOException {
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	240 if (buffer == null \|\| !buffer.hasRemaining()) {
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	241 fill();
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	242 }
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	243 if (buffer.hasRemaining()) {
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	244 return buffer.get();
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	245 }
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	246 throw new IOException();
10 382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	247 }
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	248
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	249 @Override
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	250 public void done() {
26 71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	251 buffer = null;
10 382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	252 if (fileChannel != null) {
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	253 try {
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	254 fileChannel.close();
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	255 } catch (IOException ex) {
456 909306e412e2 Refactor LogFacility and SessionContext, better API for both Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 440 diff changeset	256 logFacility.dump(getClass(), Warn, ex, null);
10 382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	257 }
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	258 fileChannel = null;
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	259 }
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	260 }
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	261 }
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	262
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	263 // (almost) regular file access - FileChannel and buffers.
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	264 private static class FileAccess extends DataAccess {
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	265 private FileChannel fileChannel;
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	266 private ByteBuffer buffer;
420 6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	267 private long bufferStartInFile = 0; // offset of this.buffer in the file.
425 48f993aa2f41 FIXMEs: exceptions, javadoc Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 420 diff changeset	268 private final long size;
48f993aa2f41 FIXMEs: exceptions, javadoc Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 420 diff changeset	269 private final LogFacility logFacility;
10 382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	270
425 48f993aa2f41 FIXMEs: exceptions, javadoc Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 420 diff changeset	271 public FileAccess(FileChannel fc, long channelSize, int bufferSizeHint, boolean useDirect, LogFacility log) {
10 382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	272 fileChannel = fc;
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	273 size = channelSize;
425 48f993aa2f41 FIXMEs: exceptions, javadoc Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 420 diff changeset	274 logFacility = log;
420 6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	275 final int capacity = size < bufferSizeHint ? (int) size : bufferSizeHint;
10 382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	276 buffer = useDirect ? ByteBuffer.allocateDirect(capacity) : ByteBuffer.allocate(capacity);
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	277 buffer.flip(); // or .limit(0) to indicate it's empty
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	278 }
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	279
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	280 @Override
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	281 public boolean isEmpty() {
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	282 return bufferStartInFile + buffer.position() >= size;
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	283 }
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	284
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	285 @Override
420 6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	286 public DataAccess reset() throws IOException {
6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	287 longSeek(0);
6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	288 return this;
6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	289 }
6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	290
6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	291 @Override
158 b413b16d10a5 Integer offsets and file length explictly, rather than casts throughout code. Inflater may benefit from total length hint, but shall calculate it by its own if needed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 157 diff changeset	292 public int length() {
420 6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	293 return Internals.ltoi(longLength());
51 9429c7bd1920 Try DataAccess to reach revision data instead of plain byte arrays Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 27 diff changeset	294 }
9429c7bd1920 Try DataAccess to reach revision data instead of plain byte arrays Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 27 diff changeset	295
9429c7bd1920 Try DataAccess to reach revision data instead of plain byte arrays Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 27 diff changeset	296 @Override
420 6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	297 public long longLength() {
6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	298 return size;
51 9429c7bd1920 Try DataAccess to reach revision data instead of plain byte arrays Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 27 diff changeset	299 }
420 6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	300
51 9429c7bd1920 Try DataAccess to reach revision data instead of plain byte arrays Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 27 diff changeset	301 @Override
420 6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	302 public void longSeek(long offset) throws IOException {
23 6f9aca1a97be Severe defect in buffer wrap on seek Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 10 diff changeset	303 if (offset > size) {
404 31a719b9f95e Provide more detailed information on erroneous file operation Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 338 diff changeset	304 throw new IllegalArgumentException(String.format("Can't seek to %d for the file of size %d (buffer start:%d)", offset, size, bufferStartInFile));
23 6f9aca1a97be Severe defect in buffer wrap on seek Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 10 diff changeset	305 }
10 382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	306 if (offset < bufferStartInFile + buffer.limit() && offset >= bufferStartInFile) {
420 6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	307 // cast to int is safe, we've checked we fit into buffer
6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	308 buffer.position(Internals.ltoi(offset - bufferStartInFile));
10 382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	309 } else {
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	310 // out of current buffer, invalidate it (force re-read)
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	311 // XXX or ever re-read it right away?
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	312 bufferStartInFile = offset;
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	313 buffer.clear();
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	314 buffer.limit(0); // or .flip() to indicate we switch to reading
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	315 fileChannel.position(offset);
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	316 }
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	317 }
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	318
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	319 @Override
420 6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	320 public void seek(int offset) throws IOException {
6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	321 longSeek(offset);
6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	322 }
6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	323
6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	324 @Override
10 382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	325 public void skip(int bytes) throws IOException {
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	326 final int newPos = buffer.position() + bytes;
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	327 if (newPos >= 0 && newPos < buffer.limit()) {
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	328 // no need to move file pointer, just rewind/seek buffer
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	329 buffer.position(newPos);
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	330 } else {
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	331 //
420 6c22bdc0bdfd Respect long offsets in revlogs Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 414 diff changeset	332 longSeek(bufferStartInFile + newPos);
10 382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	333 }
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	334 }
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	335
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	336 private boolean fill() throws IOException {
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	337 if (!buffer.hasRemaining()) {
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	338 bufferStartInFile += buffer.limit();
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	339 buffer.clear();
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	340 if (bufferStartInFile < size) { // just in case there'd be any exception on EOF, not -1
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	341 fileChannel.read(buffer);
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	342 // may return -1 when EOF, but empty will reflect this, hence no explicit support here
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	343 }
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	344 buffer.flip();
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	345 }
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	346 return buffer.hasRemaining();
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	347 }
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	348
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	349 @Override
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	350 public void readBytes(byte[] buf, int offset, int length) throws IOException {
26 71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	351 if (!buffer.hasRemaining()) {
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	352 fill();
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	353 }
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	354 while (length > 0) {
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	355 int tail = buffer.remaining();
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	356 if (tail == 0) {
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	357 throw new IOException(); // shall not happen provided stream contains expected data and no attempts to read past isEmpty() == true are made.
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	358 }
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	359 if (tail >= length) {
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	360 buffer.get(buf, offset, length);
10 382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	361 } else {
26 71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	362 buffer.get(buf, offset, tail);
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	363 fill();
10 382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	364 }
26 71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	365 offset += tail;
71a9ba42cee8 Memory-mapped files for bigger files. Defect reading number of bytes greater than size of the buffer fixed Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 23 diff changeset	366 length -= tail;
10 382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	367 }
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	368 }
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	369
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	370 @Override
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	371 public byte readByte() throws IOException {
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	372 if (buffer.hasRemaining()) {
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	373 return buffer.get();
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	374 }
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	375 if (fill()) {
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	376 return buffer.get();
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	377 }
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	378 throw new IOException();
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	379 }
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	380
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	381 @Override
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	382 public void done() {
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	383 if (buffer != null) {
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	384 buffer = null;
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	385 }
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	386 if (fileChannel != null) {
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	387 try {
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	388 fileChannel.close();
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	389 } catch (IOException ex) {
456 909306e412e2 Refactor LogFacility and SessionContext, better API for both Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 440 diff changeset	390 logFacility.dump(getClass(), Warn, ex, null);
10 382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	391 }
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	392 fileChannel = null;
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	393 }
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	394 }
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	395 }
534 243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	396
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	397 public/XXX, private, once HgCloneCommand stops using it / static class StreamDataSerializer extends DataSerializer {
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	398 private final OutputStream out;
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	399 private final LogFacility log;
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	400 private byte[] buffer;
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	401
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	402 public StreamDataSerializer(LogFacility logFacility, OutputStream os) {
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	403 assert os != null;
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	404 out = os;
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	405 log = logFacility;
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	406 }
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	407
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	408 @Override
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	409 public void write(byte[] data, int offset, int length) throws IOException {
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	410 out.write(data, offset, length);
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	411 }
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	412
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	413 @Override
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	414 public void writeInt(int... values) throws IOException {
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	415 ensureBufferSize(4*values.length); // sizeof(int)
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	416 int idx = 0;
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	417 for (int v : values) {
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	418 DataSerializer.bigEndian(v, buffer, idx);
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	419 idx += 4;
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	420 }
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	421 out.write(buffer, 0, idx);
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	422 }
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	423
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	424 @Override
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	425 public void writeByte(byte... values) throws IOException {
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	426 if (values.length == 1) {
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	427 out.write(values[0]);
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	428 } else {
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	429 out.write(values, 0, values.length);
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	430 }
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	431 }
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	432
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	433 private void ensureBufferSize(int bytesNeeded) {
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	434 if (buffer == null \|\| buffer.length < bytesNeeded) {
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	435 buffer = new byte[bytesNeeded];
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	436 }
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	437 }
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	438
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	439 @Override
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	440 public void done() {
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	441 try {
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	442 out.flush();
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	443 out.close();
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	444 } catch (IOException ex) {
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	445 log.dump(getClass(), Error, ex, "Failure to close stream");
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	446 }
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	447 }
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 494 diff changeset	448 }
10 382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	449 }

Mercurial > hg4j

annotate src/org/tmatesoft/hg/internal/DataAccessProvider.java @ 610:5c68567b3645