Examples of org.apache.hadoop.fs.Trash

org.apache.hadoop.fs.Trash
Provides a trash feature. Files are moved to a user's trash directory, a subdirectory of their home directory named ".Trash". Files are initially moved to a current sub-directory of the trash directory. Within that sub-directory their original path is preserved. Periodically one may checkpoint the current trash and remove older checkpoints. (This design permits trash management without enumeration of the full trash content, without date support in the filesystem, and without clock synchronization.)

    LOG.info("deleting  " + f);
    try {
      if(!fs.exists(f)) {
        return false;
      }
      Trash trashTmp = new Trash(fs.getConf());
      if (trashTmp.moveToTrash(f)) {
        LOG.info("Moved to trash: " + f);
        return true;
      }
      if (fs.delete(f, true)) {
        LOG.info("Deleted the diretory " + f);

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          @Override
          public FileSystem run() throws IOException {
            return FileSystem.get(conf);
          }
        });
    this.emptier = new Thread(new Trash(fs, conf).getEmptier(), "Trash Emptier");
    this.emptier.setDaemon(true);
    this.emptier.start();
  }

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      // Path or FileSystem. So need to achieve this by creating a dummy conf.
      // this needs to be filtered out based on version
      Configuration dupConf = new Configuration(conf);
      FileSystem.setDefaultUri(dupConf, fs.getUri());


      Trash trashTmp = new Trash(dupConf);
      if (trashTmp.moveToTrash(f)) {
        LOG.info("Moved to trash: " + f);
        return true;
      }
      if (fs.delete(f, true)) {
        LOG.info("Deleted the diretory " + f);

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    // this needs to be filtered out based on version
    Configuration dupConf = new Configuration(conf);
    FileSystem.setDefaultUri(dupConf, fs.getUri());


    try {
      Trash trashTmp = new Trash(dupConf);
      if (trashTmp.moveToTrash(f)) {
        LOG.info("Moved to trash: " + f);
        return true;
      }


      if (fs.delete(f, true)) {

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    this.server.start();  //start RPC server   
    startTrashEmptier(conf);
  }


  private void startTrashEmptier(Configuration conf) throws IOException {
    this.emptier = new Thread(new Trash(conf).getEmptier(), "Trash Emptier");
    this.emptier.setDaemon(true);
    this.emptier.start();
  }

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      try {
        f = writeFile(lfs, f);


        FileSystem.closeAll();
        FileSystem localFs = FileSystem.get(URI.create("file:///"), conf);
        Trash lTrash = new Trash(localFs, conf);
        lTrash.moveToTrash(f.getParent());
        checkTrash(localFs, lTrash.getCurrentTrashDir(), f);
      } finally {
        if (lfs.exists(p)) {
          lfs.delete(p, true);
        }
      }

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    long trashInterval 
      = conf.getLong(CommonConfigurationKeys.FS_TRASH_INTERVAL_KEY, 
                     CommonConfigurationKeys.FS_TRASH_INTERVAL_DEFAULT);
    if(trashInterval == 0)
      return;
    this.emptier = new Thread(new Trash(conf).getEmptier(), "Trash Emptier");
    this.emptier.setDaemon(true);
    this.emptier.start();
  }

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    }


    @Override
    protected void processArguments(LinkedList<PathData> args)
    throws IOException {
      Trash trash = new Trash(getConf());
      trash.expunge();
      trash.checkpoint();    
    }

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          @Override
          public FileSystem run() throws IOException {
            return FileSystem.get(conf);
          }
        });
    this.emptier = new Thread(new Trash(fs, conf).getEmptier(), "Trash Emptier");
    this.emptier.setDaemon(true);
    this.emptier.start();
  }

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    myMetrics = new NameNodeMetrics(conf, this);


    this.namesystem = new FSNamesystem(this, conf);
    this.server.start();  //start RPC server   


    this.emptier = new Thread(new Trash(conf).getEmptier(), "Trash Emptier");
    this.emptier.setDaemon(true);
    this.emptier.start();
  }

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