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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    private final NioPipeChannelImpl leftSide;
    private final NioPipeChannelImpl rightSide;


    NioPipeConnection(final NioXnio nioXnio, final IoHandler<? super StreamChannel> leftHandler, final IoHandler<? super StreamChannel> rightHandler, final Executor executor) throws IOException {
        final Pipe leftToRight = Pipe.open();
        final Pipe rightToLeft = Pipe.open();
        final Pipe.SourceChannel leftToRightSource = leftToRight.source();
        final Pipe.SinkChannel leftToRightSink = rightToLeft.sink();
        final Pipe.SourceChannel rightToLeftSource = rightToLeft.source();
        final Pipe.SinkChannel rightToLeftSink = leftToRight.sink();
        leftToRightSource.configureBlocking(false);
        leftToRightSink.configureBlocking(false);
        rightToLeftSource.configureBlocking(false);
        rightToLeftSink.configureBlocking(false);

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    private final NioPipeSourceChannelImpl sourceSide;
    private final NioPipeSinkChannelImpl sinkSide;


    NioOneWayPipeConnection(final NioXnio nioXnio, final IoHandler<? super StreamSourceChannel> sourceHandler, final IoHandler<? super StreamSinkChannel> sinkHandler, final Executor executor) throws IOException {
        final Pipe pipe = Pipe.open();
        final Pipe.SourceChannel source = pipe.source();
        final Pipe.SinkChannel sink = pipe.sink();
        source.configureBlocking(false);
        sink.configureBlocking(false);
        final MBean mbean;
        try {
            mbean = new MBean();

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    assertTrue(rdSz <= 0);
  }


  @Test
  public void testNewPipePartialReadSemantics() throws IOException {
    Pipe pipe = Pipe.open();
    int sz = 10;
    ByteBuffer buf = ByteBuffer.allocate(sz);
    pipe.sink().write(ByteBuffer.wrap("small".getBytes()));
    int rdSz = pipe.source().read(buf); // this operation blocks!
    assertTrue(rdSz <= sz);
  }

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        TimeUnit.MILLISECONDS));
  }


  @Test
  public void testNewPipeBlockingSemantics() throws IOException {
    Pipe pipe = Pipe.open();
    ByteBuffer buf = ByteBuffer.allocate(10);
    assertTrue(pipe.source().isBlocking());
    pipe.source().configureBlocking(false);
    assertTrue(!pipe.source().isBlocking());
    int rdSz = pipe.source().read(buf); // this operation blocks!
    assertTrue(rdSz <= 0);
  }

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