Examples of java.nio.channels.Pipe

java.nio.channels.Pipe
A pair of channels that implements a unidirectional pipe.
A pipe consists of a pair of channels: A writable {@link Pipe.SinkChannel sink} channel and a readable {@link Pipe.SourceChannel source}channel. Once some bytes are written to the sink channel they can be read from source channel in exactlyAthe order in which they were written.
Whether or not a thread writing bytes to a pipe will block until another thread reads those bytes, or some previously-written bytes, from the pipe is system-dependent and therefore unspecified. Many pipe implementations will buffer up to a certain number of bytes between the sink and source channels, but such buffering should not be assumed.
@author Mark Reinhold @author JSR-51 Expert Group @since 1.4

  
  @Test
  public void testSocketIOWithTimeout() throws Exception {
    
    // first open pipe:
    Pipe pipe = Pipe.open();
    Pipe.SourceChannel source = pipe.source();
    Pipe.SinkChannel sink = pipe.sink();
    
    try {
      final InputStream in = new SocketInputStream(source, TIMEOUT);
      OutputStream out = new SocketOutputStream(sink, TIMEOUT);

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    public void test_read_$LByteBufferII() throws IOException {
        ByteBuffer[] bufArray = { buffer, positionedBuffer };
        boolean[] sinkBlockingMode = { true, true, false, false };
        boolean[] sourceBlockingMode = { true, false, true, false };
        for (int i = 0; i < sinkBlockingMode.length; ++i) {
            Pipe pipe = Pipe.open();
            sink = pipe.sink();
            source = pipe.source();


            sink.configureBlocking(sinkBlockingMode[i]);
            source.configureBlocking(sourceBlockingMode[i]);


            buffer.position(0);

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    private int[] writableFDsToKeys;


    public SelectorImpl(SelectorProvider selectorProvider) {
        super(selectorProvider);
        try {
            Pipe mockSelector = selectorProvider.openPipe();
            sink = mockSelector.sink();
            source = mockSelector.source();
            sourcefd = ((FileDescriptorHandler) source).getFD();
            source.configureBlocking(false);


            readableFDs = new FileDescriptor[1];
            writableFDs = new FileDescriptor[0];

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  /**
   * @tests java.nio.channels.Pipe#open()
   */
  public void test_open() throws IOException{
    Pipe pipe = Pipe.open();
    assertNotNull(pipe);
  }

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  /**
   * @tests java.nio.channels.Pipe#sink()
   */
  public void test_sink() throws IOException {
    Pipe pipe = Pipe.open();
    SinkChannel sink = pipe.sink();
    assertTrue(sink.isBlocking());
  }

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  /**
   * @tests java.nio.channels.Pipe#source()
   */
  public void test_source() throws IOException {
    Pipe pipe = Pipe.open();
    SourceChannel source = pipe.source();
    assertTrue(source.isBlocking());
  }

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    private int[] writableFDsToKeys;


    public SelectorImpl(SelectorProvider selectorProvider) {
        super(selectorProvider);
        try {
            Pipe mockSelector = selectorProvider.openPipe();
            sink = mockSelector.sink();
            source = mockSelector.source();
            sourcefd = ((FileDescriptorHandler) source).getFD();
            source.configureBlocking(false);


            readableFDs = new FileDescriptor[1];
            writableFDs = new FileDescriptor[0];

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  }
  
  public void testSocketIOWithTimeout() throws IOException {
    
    // first open pipe:
    Pipe pipe = Pipe.open();
    Pipe.SourceChannel source = pipe.source();
    Pipe.SinkChannel sink = pipe.sink();
    
    try {
      InputStream in = new SocketInputStream(source, TIMEOUT);
      OutputStream out = new SocketOutputStream(sink, TIMEOUT);

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    private InternalKeyMap<EpollSelectionKeyImpl> quickMap = new InternalKeyMap<EpollSelectionKeyImpl>();


    public EpollSelectorImpl(SelectorProvider selectorProvider) {
        super(selectorProvider);
        try {
            Pipe mockSelector = selectorProvider.openPipe();
            sink = mockSelector.sink();
            source = mockSelector.source();
            sourcefd = ((FileDescriptorHandler) source).getFD();
            source.configureBlocking(false);


            fileDescriptorClass = sourcefd.getClass();

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  // REMIND: create threads and other resources lazily?


  selector = Selector.open();


  Pipe pipe = Pipe.open();
  wakeupPipeSink = pipe.sink();
  wakeupPipeSource = pipe.source();
  wakeupPipeSource.configureBlocking(false);
  wakeupPipeKey = wakeupPipeSource.register(selector,
              SelectionKey.OP_READ);


  for (int i = 0; i < concurrency; i++) {

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