1 | /*
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2 | * Copyright 2000-2004 The Apache Software Foundation
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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 | */
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17 | package org.apache.tools.ant.taskdefs.optional.ejb;
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18 |
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19 | import java.io.File;
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20 | import java.io.FileInputStream;
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21 | import java.io.ObjectInputStream;
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22 | import javax.ejb.deployment.DeploymentDescriptor;
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23 |
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24 | /**
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25 | * A helper class which performs the actual work of the ddcreator task.
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26 | *
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27 | * This class is run with a classpath which includes the weblogic tools and the home and remote
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28 | * interface class files referenced in the deployment descriptors being built.
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29 | *
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30 | */
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31 | public class DDCreatorHelper {
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32 | /**
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33 | * The root directory of the tree containing the textual deployment descriptors.
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34 | */
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35 | private File descriptorDirectory;
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36 |
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37 | /**
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38 | * The directory where generated serialised deployment descriptors are written.
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39 | */
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40 | private File generatedFilesDirectory;
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41 |
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42 | /**
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43 | * The descriptor text files for which a serialised descriptor is to be created.
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44 | */
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45 | String[] descriptors;
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46 |
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47 | /**
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48 | * The main method.
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49 | *
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50 | * The main method creates an instance of the DDCreatorHelper, passing it the
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51 | * args which it then processes.
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52 | */
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53 | public static void main(String[] args) throws Exception {
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54 | DDCreatorHelper helper = new DDCreatorHelper(args);
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55 | helper.process();
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56 | }
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57 |
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58 | /**
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59 | * Initialise the helper with the command arguments.
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60 | *
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61 | */
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62 | private DDCreatorHelper(String[] args) {
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63 | int index = 0;
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64 | descriptorDirectory = new File(args[index++]);
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65 | generatedFilesDirectory = new File(args[index++]);
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66 |
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67 | descriptors = new String[args.length - index];
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68 | for (int i = 0; index < args.length; ++i) {
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69 | descriptors[i] = args[index++];
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70 | }
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71 | }
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72 |
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73 | /**
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74 | * Do the actual work.
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75 | *
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76 | * The work proceeds by examining each descriptor given. If the serialised
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77 | * file does not exist or is older than the text description, the weblogic
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78 | * DDCreator tool is invoked directly to build the serialised descriptor.
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79 | */
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80 | private void process() throws Exception {
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81 | for (int i = 0; i < descriptors.length; ++i) {
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82 | String descriptorName = descriptors[i];
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83 | File descriptorFile = new File(descriptorDirectory, descriptorName);
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84 |
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85 | int extIndex = descriptorName.lastIndexOf(".");
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86 | String serName = null;
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87 | if (extIndex != -1) {
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88 | serName = descriptorName.substring(0, extIndex) + ".ser";
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89 | } else {
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90 | serName = descriptorName + ".ser";
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91 | }
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92 | File serFile = new File(generatedFilesDirectory, serName);
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93 |
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94 | // do we need to regenerate the file
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95 | if (!serFile.exists() || serFile.lastModified() < descriptorFile.lastModified()
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96 | || regenerateSerializedFile(serFile)) {
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97 |
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98 | String[] args = {"-noexit",
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99 | "-d", serFile.getParent(),
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100 | "-outputfile", serFile.getName(),
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101 | descriptorFile.getPath()};
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102 | try {
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103 | weblogic.ejb.utils.DDCreator.main(args);
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104 | } catch (Exception e) {
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105 | // there was an exception - run with no exit to get proper error
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106 | String[] newArgs = {"-d", generatedFilesDirectory.getPath(),
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107 | "-outputfile", serFile.getName(),
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108 | descriptorFile.getPath()};
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109 | weblogic.ejb.utils.DDCreator.main(newArgs);
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110 | }
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111 | }
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112 | }
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113 | }
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114 |
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115 | /**
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116 | * EJBC will fail if the serialized descriptor file does not match the bean classes.
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117 | * You can test for this by trying to load the deployment descriptor. If it fails,
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118 | * the serialized file needs to be regenerated because the associated class files
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119 | * don't match.
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120 | */
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121 | private boolean regenerateSerializedFile(File serFile) {
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122 | try {
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123 |
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124 | FileInputStream fis = new FileInputStream(serFile);
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125 | ObjectInputStream ois = new ObjectInputStream(fis);
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126 | DeploymentDescriptor dd = (DeploymentDescriptor) ois.readObject();
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127 | fis.close();
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128 |
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129 | // Since the descriptor read properly, everything should be o.k.
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130 | return false;
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131 |
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132 | } catch (Exception e) {
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133 |
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134 | // Weblogic will throw an error if the deployment descriptor does
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135 | // not match the class files.
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136 | return true;
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137 |
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138 | }
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139 | }
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140 | }
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