Example usage for java.io PipedInputStream read

Introduction

In this page you can find the example usage for java.io PipedInputStream read.

Prototype

public synchronized int read(byte b[], int off, int len) throws IOException 

Source Link

Document

Reads up to len bytes of data from this piped input stream into an array of bytes.

Usage

From source file:Main.java

public static void main(String[] args) throws Exception {

    PipedOutputStream out = new PipedOutputStream();
    PipedInputStream in = new PipedInputStream();

    // connect input and output
    in.connect(out);//  w  ww  .  j av a  2s . com

    // write something
    out.write(70);
    out.write(71);

    // read what we wrote into an array of bytes
    byte[] b = new byte[2];
    in.read(b, 0, 2);

    System.out.println(new String(b));
    in.close();
}

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From source file:com.emc.ecs.sync.CasMigrationTest.java

private String pipeAndGetMd5(byte[] source) throws Exception {
    PipedInputStream pin = new PipedInputStream(BUFFER_SIZE);
    PipedOutputStream pout = new PipedOutputStream(pin);

    Producer producer = new Producer(source, pout);

    // produce in parallel
    Thread producerThread = new Thread(producer);
    producerThread.start();//from   w  w  w.j av  a 2 s  .c  o  m

    // consume inside this thread
    byte[] dest = new byte[source.length];
    try {
        int read = 0;
        while (read < dest.length && read != -1) {
            read += pin.read(dest, read, dest.length - read);
        }
    } finally {
        try {
            pin.close();
        } catch (Throwable t) {
            // ignore
        }
    }

    // synchronize
    producerThread.join();

    return Hex.encodeHexString(MessageDigest.getInstance("MD5").digest(dest));
}

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