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comparison src/org/tmatesoft/hg/internal/Metadata.java @ 694:7efabe0cddcf

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Speed up (a) file rename history to minimize file reads; (b) file.isCopy(int) to read metadata for few revisions at once (use pattern assumes earlier revisions are likely to be queried, too); (c) HgIgnore.isIgnored by caching matched initial fragments (to substitute more expensive Matcher.matches with cheaper HashMap.contains)
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Mon, 05 Aug 2013 17:42:10 +0200
parents e3717fc7d26f
children
comparison
equal deleted inserted replaced
693:32b0d19e8aba 694:7efabe0cddcf
14 * the terms of a license other than GNU General Public License 14 * the terms of a license other than GNU General Public License
15 * contact TMate Software at support@hg4j.com 15 * contact TMate Software at support@hg4j.com
16 */ 16 */
17 package org.tmatesoft.hg.internal; 17 package org.tmatesoft.hg.internal;
18 18
19 import static org.tmatesoft.hg.repo.HgRepository.NO_REVISION;
19 import static org.tmatesoft.hg.util.LogFacility.Severity.Error; 20 import static org.tmatesoft.hg.util.LogFacility.Severity.Error;
20 21
21 import java.io.ByteArrayOutputStream; 22 import java.io.ByteArrayOutputStream;
22 import java.io.IOException; 23 import java.io.IOException;
23 import java.util.ArrayList; 24 import java.util.ArrayList;
48 private final IntMap<Metadata.Record> entries = new IntMap<Metadata.Record>(5); 49 private final IntMap<Metadata.Record> entries = new IntMap<Metadata.Record>(5);
49 50
50 private final Metadata.Record NONE = new Record(-1, null); // don't want statics 51 private final Metadata.Record NONE = new Record(-1, null); // don't want statics
51 52
52 private final LogFacility log; 53 private final LogFacility log;
54
55 private int lastRevRead = NO_REVISION;
53 56
54 public Metadata(SessionContext.Source sessionCtx) { 57 public Metadata(SessionContext.Source sessionCtx) {
55 log = sessionCtx.getSessionContext().getLog(); 58 log = sessionCtx.getSessionContext().getLog();
56 } 59 }
57 60
58 // true when there's metadata for given revision 61 /**
62 * @return <code>true</code> when there's metadata for given revision
63 */
59 public boolean known(int revision) { 64 public boolean known(int revision) {
60 Metadata.Record i = entries.get(revision); 65 Metadata.Record i = entries.get(revision);
61 return i != null && NONE != i; 66 return i != null && NONE != i;
62 } 67 }
63 68
64 // true when revision has been checked for metadata presence. 69 /**
70 * @return <code>true</code> when revision has been checked for metadata presence.
71 */
65 public boolean checked(int revision) { 72 public boolean checked(int revision) {
66 return entries.containsKey(revision); 73 return entries.containsKey(revision);
67 } 74 }
68 75
69 // true when revision has been checked and found not having any metadata 76 // true when revision has been checked and found not having any metadata
70 public boolean none(int revision) { 77 public boolean none(int revision) {
71 Metadata.Record i = entries.get(revision); 78 Metadata.Record i = entries.get(revision);
72 return i == NONE; 79 return i == NONE;
80 }
81
82 /**
83 * Get the greatest revision index visited so far.
84 * Note, doesn't imply all revisions up to this has been visited.
85 */
86 public int lastRevisionRead() {
87 return lastRevRead;
73 } 88 }
74 89
75 // mark revision as having no metadata. 90 // mark revision as having no metadata.
76 void recordNone(int revision) { 91 void recordNone(int revision) {
77 Metadata.Record i = entries.get(revision); 92 Metadata.Record i = entries.get(revision);
96 /** 111 /**
97 * @return <code>true</code> if metadata has been found 112 * @return <code>true</code> if metadata has been found
98 */ 113 */
99 public boolean tryRead(int revisionNumber, DataAccess data) throws IOException, HgInvalidControlFileException { 114 public boolean tryRead(int revisionNumber, DataAccess data) throws IOException, HgInvalidControlFileException {
100 final int daLength = data.length(); 115 final int daLength = data.length();
116 if (lastRevRead == NO_REVISION || revisionNumber > lastRevRead) {
117 lastRevRead = revisionNumber;
118 }
101 if (daLength < 4 || data.readByte() != 1 || data.readByte() != 10) { 119 if (daLength < 4 || data.readByte() != 1 || data.readByte() != 10) {
102 recordNone(revisionNumber); 120 recordNone(revisionNumber);
103 return false; 121 return false;
104 } else { 122 } else {
105 ArrayList<MetadataEntry> _metadata = new ArrayList<MetadataEntry>(); 123 ArrayList<MetadataEntry> _metadata = new ArrayList<MetadataEntry>();