1 | package wjhk.jupload2.upload;
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2 |
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3 | import java.util.concurrent.BlockingQueue;
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4 |
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5 | import javax.swing.JProgressBar;
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6 |
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7 | import wjhk.jupload2.exception.JUploadException;
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8 | import wjhk.jupload2.filedata.FileData;
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9 | import wjhk.jupload2.gui.JUploadPanel;
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10 | import wjhk.jupload2.gui.filepanel.FilePanel;
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11 | import wjhk.jupload2.policies.UploadPolicy;
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12 |
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13 | /**
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14 | * This thread is responsible for preparing all files for upload. It stores each
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15 | * prepared file in the preparedFileQueue, for further processing.
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16 | *
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17 | * @author etienne_sf
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18 | */
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19 | public class FilePreparationThread extends Thread {
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20 |
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21 | /**
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22 | * The array of files to send, from the {@link FilePanel}
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23 | */
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24 | FileData[] fileDataArray = null;
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25 |
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26 | /**
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27 | * Number of files that are prepared for upload. A file is prepared for
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28 | * upload, if the {@link FileData#beforeUpload()} has been called.
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29 | */
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30 | int nbPreparedFiles = 0;
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31 |
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32 | /**
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33 | * The total of files that must be sent. It is initialized by the total
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34 | * number of files in the list, and is decremented each time an error occurs
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35 | * during a file preparation, and the user wants to go on.
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36 | */
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37 | int nbFilesToSent = -1;
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38 |
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39 | /**
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40 | * Sum of the length for all prepared files. This allow the calculation of
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41 | * the estimatedTotalLength.
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42 | *
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43 | * @see #anotherFileIsPrepared(UploadFileData)
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44 | */
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45 | long nbTotalNumberOfPreparedBytes = 0;
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46 |
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47 | /**
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48 | * The {@link JUploadPanel} progress bar, to follow the file preparation
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49 | * progress.
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50 | */
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51 | JProgressBar preparationProgressBar = null;
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52 |
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53 | /** A shortcut to the upload panel */
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54 | JUploadPanel uploadPanel = null;
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55 |
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56 | /** The current upload policy. */
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57 | UploadPolicy uploadPolicy = null;
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58 |
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59 | /** The thread which globally manages the upload */
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60 | FileUploadManagerThread fileUploadManagerThread = null;
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61 |
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62 | /** The current file list. */
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63 | FilePanel filePanel = null;
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64 |
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65 | /**
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66 | * The queue where each prepared file will be stored, for further processing
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67 | */
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68 | BlockingQueue<UploadFileData> preparedFileQueue = null;
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69 |
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70 | /**
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71 | * @param preparedFileQueue
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72 | * @param fileUploadManagerThread
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73 | * @param uploadPolicy
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74 | */
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75 | public FilePreparationThread(
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76 | BlockingQueue<UploadFileData> preparedFileQueue,
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77 | FileUploadManagerThread fileUploadManagerThread,
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78 | UploadPolicy uploadPolicy) {
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79 | // A thread name is very useful, when debugging...
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80 | super("FilePreparationThread");
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81 |
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82 | this.preparedFileQueue = preparedFileQueue;
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83 | this.fileUploadManagerThread = fileUploadManagerThread;
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84 | this.uploadPolicy = uploadPolicy;
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85 | this.uploadPanel = uploadPolicy.getContext().getUploadPanel();
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86 | this.filePanel = this.uploadPanel.getFilePanel();
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87 | this.preparationProgressBar = this.uploadPanel
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88 | .getPreparationProgressBar();
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89 |
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90 | // Prepare the list of files to upload. We do this here, to minimize the
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91 | // risk of concurrency, if the user drops or pastes files on the applet
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92 | // while uploading.
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93 | this.fileDataArray = this.uploadPanel.getFilePanel().getFiles();
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94 |
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95 | // We know now the total of files we should upload:
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96 | this.nbFilesToSent = fileDataArray.length;
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97 |
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98 | this.preparationProgressBar.setMaximum(100 * fileDataArray.length);
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99 | }
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100 |
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101 | /**
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102 | * The actual command to prepare files.
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103 | *
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104 | * @see java.lang.Thread#run()
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105 | * @see FileData#beforeUpload()
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106 | */
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107 | @Override
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108 | final public void run() {
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109 | // We loop through all files, and check before each if we should
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110 | // stop (for instance if an error occurs)
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111 |
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112 | // numFileInCurrentUpload is the index of the file in the current index.
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113 | // It should be the array index. But, if a file preparation fails in
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114 | // error, numFileInCurrentUpload will be the array index minus 1, if 2
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115 | // files, it will be the array index minus 2...
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116 | int numFileInCurrentUpload = 0;
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117 |
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118 | for (int i = 0; i < fileDataArray.length
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119 | && !this.fileUploadManagerThread.isUploadFinished(); i += 1) {
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120 | try {
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121 | UploadFileData uploadFileData = new UploadFileData(
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122 | fileDataArray[i], numFileInCurrentUpload,
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123 | this.fileUploadManagerThread, this.uploadPolicy);
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124 | this.uploadPolicy.displayDebug(
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125 | "============== Start of file preparation ("
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126 | + uploadFileData.getFileName() + ")", 30);
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127 |
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128 | // Let's indicate to the user what's running on.
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129 | this.preparationProgressBar.setString(this.uploadPolicy
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130 | .getLocalizedString("preparingFile", Integer
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131 | .valueOf(i + 1), Integer
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132 | .valueOf(fileDataArray.length)));
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133 | // We want an immediate repaint, to be sure that the new text is
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134 | // displayed to the user.
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135 | this.preparationProgressBar.repaint(0);
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136 |
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137 | // Then, we work
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138 |
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139 | // Let's check that everything is Ok
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140 | // More debug output, to understand where the applet freezes.
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141 | this.uploadPolicy
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142 | .displayDebug(
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143 | this.getClass().getName()
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144 | + ".prepareFiles(): before call to beforeUpload()",
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145 | 100);
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146 |
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147 | try {
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148 | // Let's try to prepare the upload.
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149 | uploadFileData.beforeUpload();
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150 |
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151 | // If we arrive, here, it means that beforeUpload() did not
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152 | // throw an exception, that is: the file is now prepared.
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153 | // Next file will be ... next in the current upload.
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154 | numFileInCurrentUpload += 1;
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155 |
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156 | // TODO Whe error during file preparation ask the user.
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157 |
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158 | this.uploadPolicy.displayDebug(
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159 | "============== End of file preparation ("
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160 | + uploadFileData.getFileName() + ")", 30);
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161 | try {
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162 | anotherFileIsPrepared(uploadFileData);
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163 | } catch (InterruptedException e) {
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164 | // There was a problem putting the item. Let's try again
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165 | // in
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166 | // the next loop.
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167 | i -= 1;
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168 | }
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169 | } catch (JUploadException e) {
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170 | // An error occurs during file preparation. We'll send one
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171 | // file less than expected.
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172 | this.nbFilesToSent -= 1;
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173 | throw e;
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174 | }
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175 |
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176 | // The file preparation is finished. Let's update the progress
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177 | // bar.
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178 | this.preparationProgressBar
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179 | .setValue(this.nbPreparedFiles * 100);
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180 | this.preparationProgressBar.repaint();
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181 | } catch (JUploadException e) {
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182 | this.fileUploadManagerThread.setUploadException(e);
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183 | }
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184 | }// while
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185 |
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186 | // All prepared files are posted on the preparedQueue. Let's send the
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187 | // 'End of Queue' marker.
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188 | try {
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189 | this.preparedFileQueue.put(new UploadFileDataPoisonned());
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190 | } catch (InterruptedException e) {
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191 | // We should not be interrupted here. If it happens, it should be
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192 | // because the upload was stopped. But, then, we may have the
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193 | // PacketConstructionThread blocked, waiting for this packet. So,
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194 | // let's log a warning.
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195 | this.uploadPolicy
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196 | .displayWarn("Got interrupted, while posting the poisoned UploadFileData on the preparedQueue!");
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197 | }
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198 |
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199 | // Let's clear the bar, which is no more accurate. We let the value to
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200 | // 100%
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201 | this.preparationProgressBar.setString("");
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202 | }
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203 |
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204 | /**
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205 | * This method is called each time a new file is ready to upload. It
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206 | * calculates if a new packet of files is ready to upload. It is private, as
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207 | * it may be called only from this class.
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208 | *
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209 | * @throws JUploadException
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210 | */
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211 | private void anotherFileIsPrepared(UploadFileData newlyPreparedFileData)
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212 | throws JUploadException, InterruptedException {
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213 | this.nbPreparedFiles += 1;
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214 | this.uploadPolicy
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215 | .displayDebug(
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216 | this.getClass().getName()
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217 | + ".anotherFileIsReady(): before call(1) to newlyPreparedFileData.getUploadLength()",
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218 | 100);
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219 | this.uploadPolicy
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220 | .displayDebug(
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221 | this.getClass().getName()
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222 | + ".checkIfNextPacketIsReady(): before call(2) to currentFileData.getUploadLength()",
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223 | 100);
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224 | this.nbTotalNumberOfPreparedBytes += newlyPreparedFileData
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225 | .getUploadLength();
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226 |
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227 | this.preparedFileQueue.put(newlyPreparedFileData);
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228 | }
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229 |
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230 | /**
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231 | * Returns the total number of bytes to upload. This takes into account only
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232 | * the prepared file content. It ignores the possible head and tails of the
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233 | * request (for instance: http headers...). This gives a good idea of the
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234 | * total amount to send, and allows is suffisiant to properly manage the
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235 | * upload progress bar.<BR>
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236 | * The total number of bytes can only be calculated when all files are
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237 | * prepared. When this method is called before this, an estimation is done
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238 | * for non prepared files, based on the average size of the already prepared
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239 | * files.
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240 | *
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241 | * @return The real or estimated total number of bytes to send
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242 | */
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243 | public double getTotalFileBytesToSend() {
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244 | double totalFileBytesToSend;
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245 |
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246 | // Let's estimate the total, or calculate it, of all files are
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247 | // prepared
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248 | if (this.nbPreparedFiles == this.fileDataArray.length) {
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249 | // All files are prepared: it's no more an estimation !
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250 | totalFileBytesToSend = this.nbTotalNumberOfPreparedBytes;
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251 | } else {
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252 | // We sum the total number of prepared bytes, and we estimate
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253 | // the size of the files that are not prepared yet
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254 | totalFileBytesToSend = this.nbTotalNumberOfPreparedBytes
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255 | +
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256 | // And we sum it with the average amount per file
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257 | // prepared for the others
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258 | (this.fileDataArray.length - this.nbPreparedFiles)
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259 | * this.nbTotalNumberOfPreparedBytes / this.nbPreparedFiles;
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260 | }
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261 |
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262 | return totalFileBytesToSend;
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263 | }
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264 |
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265 | /**
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266 | * @return the nbPreparedFiles
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267 | */
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268 | public int getNbPreparedFiles() {
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269 | return nbPreparedFiles;
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270 | }
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271 |
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272 | /**
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273 | * @return the nbFilesToSent
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274 | */
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275 | public int getNbFilesToSent() {
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276 | return nbFilesToSent;
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277 | }
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278 |
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279 | /**
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280 | * @return the nbTotalNumberOfPreparedBytes
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281 | */
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282 | public long getNbTotalNumberOfPreparedBytes() {
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283 | return nbTotalNumberOfPreparedBytes;
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284 | }
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285 | }
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