Examples of com.cloudera.util.InputStreamPipe

com.cloudera.util.InputStreamPipe
Channels that wrap input streams are blocking, so this wrapper creates a thread that pumps data from input streams, and presents and nonblocking interface to the data.

  void startup() throws IOException {
    selector = Selector.open();


    rt = Runtime.getRuntime();
    proc = rt.exec(args);
    outPipe = new InputStreamPipe(proc.getInputStream());
    errPipe = new InputStreamPipe(proc.getErrorStream());
    if (interactive) {
      watchdogPipe = new InputStreamPipe(System.in);
      procIn = new PrintStream(proc.getOutputStream());
    }


    stdout = outPipe.getChannel();
    stderr = errPipe.getChannel();

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    errFinished.set(false);
    proc = Runtime.getRuntime().exec(command);


    // Just reading from stdout and stderr can block, so we wrap them with
    // InputStreamPipe allows them to be nonblocking.
    stdinISP = new InputStreamPipe(proc.getInputStream());
    stderrISP = new InputStreamPipe(proc.getErrorStream());
    stdout = (ReadableByteChannel) stdinISP.getChannel();
    stderr = (ReadableByteChannel) stderrISP.getChannel();


    readOut = new ReaderThread(stdout, "STDOUT", outFinished);
    readErr = new ReaderThread(stderr, "STDERR", errFinished);

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    errFinished.set(false);
    proc = Runtime.getRuntime().exec(command);


    // Just reading from stdout and stderr can block, so we wrap them with
    // InputStreamPipe allows them to be nonblocking.
    stdinISP = new InputStreamPipe(proc.getInputStream());
    stderrISP = new InputStreamPipe(proc.getErrorStream());
    stdout = (ReadableByteChannel) stdinISP.getChannel();
    stderr = (ReadableByteChannel) stderrISP.getChannel();


    readOut = new ReaderThread(stdout, "STDOUT", outFinished);
    readErr = new ReaderThread(stderr, "STDERR", errFinished);

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    errFinished.set(false);
    proc = Runtime.getRuntime().exec(command);


    // Just reading from stdout and stderr can block, so we wrap them with
    // InputSTreamPipe allows them to be nonblocking.
    stdinISP = new InputStreamPipe(proc.getInputStream());
    stderrISP = new InputStreamPipe(proc.getErrorStream());
    stdout = (ReadableByteChannel) stdinISP.getChannel();
    stderr = (ReadableByteChannel) stderrISP.getChannel();


    readOut = new ReaderThread(stdout, "STDOUT", outFinished);
    readErr = new ReaderThread(stderr, "STDERR", errFinished);

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    outFinished.set(false);
    errFinished.set(false);
    proc = Runtime.getRuntime().exec(command);


    try {
      stdinISP = new InputStreamPipe(proc.getInputStream());
      stderrISP = new InputStreamPipe(proc.getErrorStream());
      stdout = (ReadableByteChannel) stdinISP.getChannel();
      stderr = (ReadableByteChannel) stderrISP.getChannel();
    } catch (IOException e) {
      proc.getInputStream().close();
      proc.getErrorStream().close();

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Related Classes of com.cloudera.util.InputStreamPipe

com.cloudera.flume.handlers.exec.ExecEventSource

com.cloudera.flume.handlers.exec.ExecNioSource

com.cloudera.flume.watchdog.Watchdog

java.nio.ByteBuffer

java.nio.channels.SelectableChannel

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