64 lines
1.8 KiB
Java
64 lines
1.8 KiB
Java
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//: concurrency/PipedIO.java
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// <20>2015 MindView LLC: see Copyright.txt
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// Using pipes for inter-task I/O
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import java.util.concurrent.*;
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import java.io.*;
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import java.util.*;
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import static com.mindviewinc.util.Print.*;
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class Sender implements Runnable {
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private Random rand = new Random(47);
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private PipedWriter out = new PipedWriter();
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public PipedWriter getPipedWriter() { return out; }
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@Override
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public void run() {
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try {
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while(true)
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for(char c = 'A'; c <= 'z'; c++) {
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out.write(c);
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TimeUnit.MILLISECONDS.sleep(rand.nextInt(500));
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}
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} catch(IOException e) {
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print(e + " Sender write exception");
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} catch(InterruptedException e) {
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print(e + " Sender sleep interrupted");
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}
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}
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}
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class Receiver implements Runnable {
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private PipedReader in;
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public Receiver(Sender sender) throws IOException {
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in = new PipedReader(sender.getPipedWriter());
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}
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@Override
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public void run() {
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try {
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while(true) {
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// Blocks until characters are there:
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printnb("Read: " + (char)in.read() + ", ");
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}
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} catch(IOException e) {
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print(e + " Receiver read exception");
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}
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}
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}
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public class PipedIO {
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public static void main(String[] args) throws Exception {
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Sender sender = new Sender();
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Receiver receiver = new Receiver(sender);
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ExecutorService exec = Executors.newCachedThreadPool();
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exec.execute(sender);
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exec.execute(receiver);
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TimeUnit.SECONDS.sleep(4);
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exec.shutdownNow();
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}
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} /* Output:
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Read: A, Read: B, Read: C, Read: D, Read: E, Read: F, Read:
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G, Read: H, Read: I, Read: J, Read: K, Read: L, Read: M,
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java.lang.InterruptedException: sleep interrupted Sender
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sleep interrupted
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java.io.InterruptedIOException Receiver read exception
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*///:~
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