test/jdk/java/nio/channels/ServerSocketChannel/NonBlockingAccept.java

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/* @test
 * @bug 4801882 5046333 8141595
 * @summary test ServerSocketAdaptor.accept on nonblocking channel
 * @library ..
 * @build TestUtil
 * @run main NonBlockingAccept
 * @key randomness
 */

import java.io.*;
import java.net.*;
import java.nio.*;
import java.nio.channels.*;


public class NonBlockingAccept {

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

        ServerSocketChannel ssc = ServerSocketChannel.open();
        InetSocketAddress isa = TestUtil.bindToRandomPort(ssc);
        ssc.configureBlocking(false);
        ServerSocket ss = ssc.socket();

        // Exception should be thrown when no connection is waiting
        try {
            ss.accept();
            throw new RuntimeException("Expected exception not thrown");
        } catch (IllegalBlockingModeException ibme) {
            // Correct result
        }

        // No exception should be thrown when a connection is waiting (5046333)
        SocketChannel sc = SocketChannel.open();
        sc.configureBlocking(false);
        sc.connect(isa);

        // loop until accepted
        while (true) {
            try {
                ss.accept();
                break;
            } catch (IllegalBlockingModeException ex) {
                System.out.println(ex + ", sleeping ...");
                Thread.sleep(100);
            }
        }

    }

}