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annotate src/org/tmatesoft/hg/internal/StreamLogFacility.java @ 542:a71a05ec11bc

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Towards annotate/blame support: general outline of the functionality
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 14 Feb 2013 16:36:13 +0100
parents 909306e412e2
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1 /*
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2 * Copyright (c) 2011 TMate Software Ltd
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3 *
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4 * This program is free software; you can redistribute it and/or modify
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5 * it under the terms of the GNU General Public License as published by
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6 * the Free Software Foundation; version 2 of the License.
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7 *
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8 * This program is distributed in the hope that it will be useful,
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9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 * GNU General Public License for more details.
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12 *
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13 * For information on how to redistribute this software under
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14 * the terms of a license other than GNU General Public License
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15 * contact TMate Software at support@hg4j.com
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16 */
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17 package org.tmatesoft.hg.internal;
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18
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19 import static org.tmatesoft.hg.util.LogFacility.Severity.Info;
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20
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21 import java.io.PrintStream;
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22
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23 import org.tmatesoft.hg.util.LogFacility;
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24
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25 /**
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26 * Primitive implementation of {@link LogFacility} that directs all output to specified {@link PrintStream}.
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27 *
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28 * @author Artem Tikhomirov
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29 * @author TMate Software Ltd.
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30 */
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31 public class StreamLogFacility implements LogFacility {
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32
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33 private final boolean isDebug;
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34 private final Severity severity;
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35 protected final boolean timestamp;
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36 protected final PrintStream outStream;
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37
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38 public StreamLogFacility(Severity level, boolean needTimestamp, PrintStream out) {
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39 assert level != null;
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40 severity = level;
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41 isDebug = level == Severity.Debug;
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42 timestamp = needTimestamp;
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43 outStream = out;
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44 }
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45
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46 public boolean isDebug() {
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47 return isDebug;
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48 }
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49
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50 public Severity getLevel() {
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51 return severity;
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52 }
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53
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54 public void dump(Class<?> src, Severity severity, String format, Object... args) {
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55 if (severity.ordinal() >= getLevel().ordinal()) {
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56 printf(severity, src, format, args);
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57 }
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58 }
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59
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60 public void dump(Class<?> src, Severity severity, Throwable th, String message) {
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61 if (severity.ordinal() >= getLevel().ordinal()) {
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62 printf(severity, src, th, message);
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63 }
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64 }
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65
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66 protected void printf(Severity level, Class<?> src, String format, Object... args) {
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67 String msg = String.format(format, args);
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68 if (timestamp) {
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69 outStream.printf(isDebug ? "%tT.%1$tL " : "%tT ", System.currentTimeMillis());
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70 }
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71 if (isDebug) {
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72 String cn = src.getName();
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73 if (cn.startsWith("org.tmatesoft.hg.")) {
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74 cn = "oth." + cn.substring("org.tmatesoft.hg.".length());
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75 }
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76 outStream.printf("(%s) ", cn);
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77 }
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78 outStream.printf("%s: %s", level.toString().toUpperCase(), msg);
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79 if (format.length() == 0 || format.charAt(format.length() - 1) != '\n') {
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80 outStream.println();
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81 }
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82 }
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83 protected void printf(Severity level, Class<?> src, Throwable th, String msg) {
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84 if (msg != null || timestamp || isDebug || th == null) {
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85 printf(level, src, msg == null ? "" : msg, (Object[]) null);
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86 }
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87 if (th != null) {
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88 if (getLevel().ordinal() <= Info.ordinal()) {
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89 // full stack trace
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90 th.printStackTrace(outStream);
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91 } else {
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92 // just title of the exception
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93 outStream.printf("%s: %s\n", th.getClass().getName(), th.getMessage());
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94 }
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95 }
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96 }
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97
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98 // alternative to hardcore System.out where SessionContext is not available now (or ever)
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99 public static LogFacility newDefault() {
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100 return new StreamLogFacility(Severity.Debug, true, System.out);
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101 }
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102 }