Examples of java.nio.channels.ServerSocketChannel

java.nio.channels.ServerSocketChannel
A selectable channel for stream-oriented listening sockets.
Server-socket channels are not a complete abstraction of listening network sockets. Binding and the manipulation of socket options must be done through an associated {@link java.net.ServerSocket} object obtained byinvoking the {@link #socket() socket} method. It is not possible to createa channel for an arbitrary, pre-existing server socket, nor is it possible to specify the {@link java.net.SocketImpl} object to be used by a serversocket associated with a server-socket channel.
A server-socket channel is created by invoking the {@link #open() open}method of this class. A newly-created server-socket channel is open but not yet bound. An attempt to invoke the {@link #accept() accept} method of anunbound server-socket channel will cause a {@link NotYetBoundException} tobe thrown. A server-socket channel can be bound by invoking one of the {@link java.net.ServerSocket#bind(java.net.SocketAddress,int) bind} methodsof an associated server socket.
Server-socket channels are safe for use by multiple concurrent threads.
@author Mark Reinhold @author JSR-51 Expert Group @version 1.25, 05/11/17 @since 1.4

     * Regression test for Harmony-1947.
     */
    public void test_finishConnect() throws Exception {
        SocketAddress address = new InetSocketAddress("localhost", 2046);


        ServerSocketChannel theServerChannel = ServerSocketChannel.open();
        ServerSocket serversocket = theServerChannel.socket();
        serversocket.setReuseAddress(true);
        // Bind the socket
        serversocket.bind(address);


        boolean doneNonBlockingConnect = false;

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     *        closed
     */
    public void test_socketChannel_read_ByteBufferII_remoteClosed()
            throws Exception {
        // regression 1 for HARMONY-549
        ServerSocketChannel ssc = ServerSocketChannel.open();
        ssc.socket().bind(localAddr2);
        SocketChannel sc = SocketChannel.open();
        sc.connect(localAddr2);
        ssc.accept().close();
        ByteBuffer[] buf = { ByteBuffer.allocate(10) };
        assertEquals(-1, sc.read(buf, 0, 1));
        ssc.close();
        sc.close();
    }

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    /**
     * @tests SocketChannel#write(ByteBuffer[], int, int)
     */
    public void test_socketChannel_write_ByteBufferII() throws Exception {
        // regression 2 for HARMONY-549
        ServerSocketChannel ssc = ServerSocketChannel.open();
        ssc.socket().bind(localAddr2);
        SocketChannel sc = SocketChannel.open();
        sc.connect(localAddr2);
        SocketChannel sock = ssc.accept();
        ByteBuffer[] buf = { ByteBuffer.allocate(10), null };
        try {
            sc.write(buf, 0, 2);
            fail("should throw NPE");
        } catch (NullPointerException e) {
            // expected
        }
        ssc.close();
        sc.close();
        ByteBuffer target = ByteBuffer.allocate(10);
        assertEquals(-1, sock.read(target));
    }

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    /**
     * @tests SocketChannel#read(ByteBuffer[], int, int) with a null ByteBuffer
     */
    public void test_socketChannel_read_ByteBufferII_bufNULL() throws Exception {
        // regression 3 for HARMONY-549
        ServerSocketChannel ssc = ServerSocketChannel.open();
        ssc.socket().bind(localAddr2);
        SocketChannel sc = SocketChannel.open();
        sc.connect(localAddr2);
        ssc.accept();
        ByteBuffer[] buf = new ByteBuffer[2];
        buf[0] = ByteBuffer.allocate(1);
        // let buf[1] be null
        try {
            sc.read(buf, 0, 2);
            fail("should throw NullPointerException");
        } catch (NullPointerException e) {
            // expected
        }
        ssc.close();
        sc.close();
    }

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    /**
     * @tests SocketChannel#write(ByteBuffer) after close
     */
    public void test_socketChannel_write_close() throws Exception {
        // regression 4 for HARMONY-549
        ServerSocketChannel ssc = ServerSocketChannel.open();
        ssc.socket().bind(localAddr2);
        SocketChannel sc = SocketChannel.open();
        sc.connect(localAddr2);
        SocketChannel sock = ssc.accept();
        ByteBuffer buf = null;
        ssc.close();
        sc.close();
        try {
            sc.write(buf);
            fail("should throw NPE");
        } catch (NullPointerException e) {

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            throws Exception {
        // regression 5 for HARMONY-549
        final String testStr = "Hello World";
        ByteBuffer readBuf = ByteBuffer.allocate(11);
        ByteBuffer buf = ByteBuffer.wrap(testStr.getBytes());
        ServerSocketChannel ssc = ServerSocketChannel.open();
        ssc.socket().bind(localAddr2);
        SocketChannel sc = SocketChannel.open();
        sc.connect(localAddr2);
        buf.position(2);
        ssc.accept().write(buf);
        assertEquals(9, sc.read(readBuf));
        buf.flip();
        readBuf.flip();
        byte[] read = new byte[9];
        byte[] write = new byte[11];

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      return new InetSocketAddress(acceptChannel.socket().getInetAddress(), acceptChannel.socket().getLocalPort());
    }
    
    void doAccept(SelectionKey key) throws IOException,  OutOfMemoryError {
      Connection c = null;
      ServerSocketChannel server = (ServerSocketChannel) key.channel();
      SocketChannel channel = server.accept();
      channel.configureBlocking(false);
      SelectionKey readKey = channel.register(selector, SelectionKey.OP_READ);
      c = new Connection(readKey, channel, System.currentTimeMillis());
      readKey.attach(c);
      synchronized (connectionList) {

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     */
    @Override
    protected ServerSocketChannel open(SocketAddress localAddress)
            throws Exception {
        // Creates the listening ServerSocket
        ServerSocketChannel channel = ServerSocketChannel.open();
        
        boolean success = false;
        
        try {
            // This is a non blocking socket channel
            channel.configureBlocking(false);
        
            // Configure the server socket,
            ServerSocket socket = channel.socket();
            
            // Set the reuseAddress flag accordingly with the setting
            socket.setReuseAddress(isReuseAddress());
            
            // XXX: Do we need to provide this property? (I think we need to remove it.)
            socket.setReceiveBufferSize(getSessionConfig().getReceiveBufferSize());
            
            // and bind.
            socket.bind(localAddress, getBacklog());
            
            // Register the channel within the selector for ACCEPT event
            channel.register(selector, SelectionKey.OP_ACCEPT);
            success = true;
        } finally {
            if (!success) {
                close(channel);
            }

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   * @throws Exception
   */
  public AcceptHandler newAcceptHandler( InetSocketAddress addr, int backlog,
    AcceptHandlerFactory factory ) throws Exception
  {
    ServerSocketChannel ssc = ServerSocketChannel.open();
    ssc.configureBlocking( false );
    ServerSocket ss = ssc.socket();
    ss.bind( addr, backlog );
    AcceptHandler ah = factory.newAcceptHandler( ssc );
    register( ah );
    return ah;
  }

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    return s;
  }


  private ServerSocketChannel checkChannel() throws IOException
  {
    ServerSocketChannel c = checkHandler().channel();
    if (c == null)
      throw new IOException( "c == null" );
    return c;
  }

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