1 | /*
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2 | * Copyright 2005 Paul Hinds
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3 | *
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4 | * Licensed under the Apache License, Version 2.0 (the "License");
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5 | * you may not use this file except in compliance with the License.
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6 | * You may obtain a copy of the License at
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7 | *
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8 | * http://www.apache.org/licenses/LICENSE-2.0
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9 | *
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10 | * Unless required by applicable law or agreed to in writing, software
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11 | * distributed under the License is distributed on an "AS IS" BASIS,
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12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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13 | * See the License for the specific language governing permissions and
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14 | * limitations under the License.
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15 | */
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16 | package org.tp23.antinstaller.runtime;
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17 |
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18 | import java.io.BufferedWriter;
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19 | import java.io.FileWriter;
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20 | import java.io.IOException;
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21 | import java.io.PrintWriter;
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22 | import java.io.StringWriter;
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23 |
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24 | import org.tp23.antinstaller.Installer;
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25 |
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26 | /**
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27 | * A Logger class that does not report errors
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28 | *
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29 | * @author Paul Hinds
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30 | * @version $Id: SimpleLogger.java,v 1.4 2007/01/19 00:24:36 teknopaul Exp $
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31 | */
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32 | public class SimpleLogger implements Logger {
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33 |
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34 | BufferedWriter fos;
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35 |
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36 | private String fileName;
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37 |
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38 | public SimpleLogger() {
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39 | }
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40 |
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41 | /**
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42 | * This method initialises the logger
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43 | */
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44 | public void setFileName(String fileName) {
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45 | this.fileName = fileName;
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46 | try {
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47 | fos = new BufferedWriter(new FileWriter(fileName, false));
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48 | fos.write("Logger initialized");
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49 | fos.newLine();
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50 | } catch (IOException e) {
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51 | fos = null;
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52 | }
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53 | }
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54 |
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55 | public String getFileName() {
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56 | return fileName;
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57 | }
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58 |
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59 | public void log(String message) {
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60 | if (fos == null) {
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61 | return;
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62 | }
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63 | try {
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64 | fos.write(message);
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65 | fos.newLine();
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66 | fos.flush();
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67 | } catch (Exception ex) {
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68 | throw new RuntimeException("Can not write to logs");
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69 | }
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70 | }
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71 |
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72 | public void log(Installer installer, Throwable exception) {
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73 | if (installer != null && installer.isVerbose()) {
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74 | log(exception);
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75 | }
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76 | }
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77 |
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78 | public void log(Throwable exception) {
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79 | if (fos == null) {
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80 | return;
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81 | }
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82 | try {
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83 | StringWriter writer = new StringWriter();
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84 | exception.printStackTrace(new PrintWriter(writer));
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85 | String s = writer.getBuffer().toString();
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86 | fos.write(s);
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87 | fos.newLine();
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88 | } catch (IOException ex) {
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89 | throw new RuntimeException("Can not write to logs");
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90 | }
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91 | }
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92 |
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93 | public void close() {
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94 | try {
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95 | if (fos != null) {
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96 | fos.flush();
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97 | fos.close();
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98 | fos = null;
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99 | }
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100 | } catch (IOException e) {
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101 | System.err.println("Can't close logger");
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102 | }
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103 | }
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104 |
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105 | /**
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106 | * Called by the garbage collector on an object when garbage collection
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107 | * determines that there are no more references to the object.
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108 | *
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109 | * @throws Throwable
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110 | * the <code>Exception</code> raised by this method
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111 | * @todo Implement this java.lang.Object method
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112 | */
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113 | protected void finalize() throws Throwable {
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114 | if (fos != null) {
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115 | fos.flush();
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116 | fos.close();
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117 | }
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118 | }
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119 |
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120 | }
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