Examples of org.apache.hadoop.fs.FileContext.open()

org.apache.hadoop.fs.FileContext.open()
Opens an FSDataInputStream at the indicated Path using default buffersize. @param f the file name to open @throws AccessControlException If access is denied @throws FileNotFoundException If file f does not exist @throws UnsupportedFileSystemException If file system for fis not supported @throws IOException If an I/O error occurredExceptions applicable to file systems accessed over RPC: @throws RpcClientException If an exception occurred in the RPC client @throws RpcServerException If an exception occurred in the RPC server @throws UnexpectedServerException If server implementation throws undeclared exception to RPC server

    // read the previous history file
    historyFile =
        fc.makeQualified(JobHistoryUtils.getStagingJobHistoryFile(histDirPath,
          jobId, (applicationAttemptId.getAttemptId() - 1)));
    LOG.info("History file is at " + historyFile);
    in = fc.open(historyFile);
    return in;
  }
  
  
}

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    synchronized(fileInfo) {
      Path historyFilePath = fileInfo.getHistoryFile();
      FSDataInputStream in = null;
      LOG.info("JobHistoryFile is: " + historyFilePath);
      try {
        in = fc.open(fc.makeQualified(historyFilePath));
      } catch (IOException ioe) {
        LOG.info("Can not open history file: " + historyFilePath, ioe);
        throw (new Exception("Can not open History File"));
      }

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    Path historyFilePath = new Path(jobhistoryDir, jobhistoryFileName);
    FSDataInputStream in = null;
    FileContext fc = null;
    try {
      fc = FileContext.getFileContext(conf);
      in = fc.open(fc.makeQualified(historyFilePath));
    } catch (IOException ioe) {
      LOG.info("Can not open history file: " + historyFilePath, ioe);
      throw (new Exception("Can not open History File"));
    }

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    Path historyFilePath = new Path(jobhistoryDir, jobhistoryFileName);
    FSDataInputStream in = null;
    FileContext fc = null;
    try {
      fc = FileContext.getFileContext(conf);
      in = fc.open(fc.makeQualified(historyFilePath));
    } catch (IOException ioe) {
      LOG.info("Can not open history file: " + historyFilePath, ioe);
      throw (new Exception("Can not open History File"));
    }

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      @Override
      public Configuration loadConfFile() throws IOException {
        FileContext fc = FileContext.getFileContext(configFile.toUri(), conf);
        Configuration jobConf = new Configuration(false);
        jobConf.addResource(fc.open(configFile), configFile.toString());
        return jobConf;
      }
    };
  }

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    }
    
    public synchronized Configuration loadConfFile() throws IOException {
      FileContext fc = FileContext.getFileContext(confFile.toUri(), conf);
      Configuration jobConf = new Configuration(false);
      jobConf.addResource(fc.open(confFile), confFile.toString());
      return jobConf;
    }
  }


  private SerialNumberIndex serialNumberIndex = null;

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  @Override
  public Configuration loadConfFile() throws IOException {
    Path confPath = getConfFile();
    FileContext fc = FileContext.getFileContext(confPath.toUri(), conf);
    Configuration jobConf = new Configuration(false);
    jobConf.addResource(fc.open(confPath), confPath.toString());
    return jobConf;
  }
}

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    }
    
    public synchronized Configuration loadConfFile() throws IOException {
      FileContext fc = FileContext.getFileContext(confFile.toUri(), conf);
      Configuration jobConf = new Configuration(false);
      jobConf.addResource(fc.open(confFile), confFile.toString());
      return jobConf;
    }
  }


  private SerialNumberIndex serialNumberIndex = null;

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    // read the previous history file
    historyFile =
        fc.makeQualified(JobHistoryUtils.getStagingJobHistoryFile(histDirPath,
          jobId, (applicationAttemptId.getAttemptId() - 1)));
    LOG.info("History file is at " + historyFile);
    in = fc.open(historyFile);
    return in;
  }
  
  
}

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    try {
      user.doAs(new PrivilegedExceptionAction<Object>() {
        @Override
        public Object run() throws IOException {
          FileContext myfc = FileContext.getFileContext(conf);
          myfc.open(link).read();
          return null;
        }
      });
      fail("Read link target even though target does not have"
          + " read permissions!");

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