Examples of java.nio.channels.Selector.select()

java.nio.channels.Selector.select()
Selects a set of keys whose corresponding channels are ready for I/O operations.
This method performs a blocking selection operation. It returns only after at least one channel is selected, this selector's {@link #wakeup wakeup} method is invoked, the currentthread is interrupted, or the given timeout period expires, whichever comes first.
This method does not offer real-time guarantees: It schedules the timeout as if by invoking the {@link Object#wait(long)} method.
@param timeout If positive, block for up to timeoutmilliseconds, more or less, while waiting for a channel to become ready; if zero, block indefinitely; must not be negative @return The number of keys, possibly zero,whose ready-operation sets were updated @throws IOException If an I/O error occurs @throws ClosedSelectorException If this selector is closed @throws IllegalArgumentException If the value of the timeout argument is negative

    SelectionKey tmpKey = null;
    try {
      if (this.selectableChannel.isOpen()) {
        tmpKey = this.selectableChannel.register(readSelector, 0);
        tmpKey.interestOps(tmpKey.interestOps() | SelectionKey.OP_READ);
        int code = readSelector.select(500);
        tmpKey.interestOps(tmpKey.interestOps() & ~SelectionKey.OP_READ);
        if (code > 0) {
          do {
            n = ((ReadableByteChannel) this.selectableChannel)
                .read(this.readBuffer.buf());

View Full Code Here

                start = System.currentTimeMillis();
            }
            sender.setMessage(buf);
            int selectedKeys = 0;
            try {
                selectedKeys = selector.select(0);
            } catch (Exception e) {
                e.printStackTrace();
                continue;
            }

View Full Code Here

                    ch.register(selector, SelectionKey.OP_CONNECT);
                    ch.connect(addr);
                }
            }


            int select = selector.select(1000 * 10); // 10s
            if (select > 0) {
                System.out.println("select return: " + select
                        + " events ; current connection per ip: " + currentConnectionPerIP);
                Set<SelectionKey> selectedKeys = selector.selectedKeys();
                Iterator<SelectionKey> it = selectedKeys.iterator();

View Full Code Here

        }


        start = System.currentTimeMillis();


        while (true) {
            int select = selector.select();
            D("selec return " + select);
            if (select > 0) {
                Set<SelectionKey> selectedKeys = selector.selectedKeys();
                Iterator<SelectionKey> it = selectedKeys.iterator();
                while (it.hasNext()) {

View Full Code Here

        // register the ServerSocketChannel with the Selector
        serverChannel.register (selector, SelectionKey.OP_ACCEPT);
        while (doListen) {
            // this may block for a long time, upon return the
            // selected set contains keys of the ready channels
            int n = selector.select();
            if (n == 0) {
                continue;  // nothing to do
            }
            // get an iterator over the set of selected keys
            Iterator it = selector.selectedKeys().iterator();

View Full Code Here


                try {
                    selector = SelectorFactory.openWithRetryFrom(recv.getRuntime(), SelectorProvider.provider());
                    nim.channel.configureBlocking(false);
                    SelectionKey key = nim.channel.register(selector, SelectionKey.OP_READ);
                    int n = selector.select(timeout);


                    if(n > 0) {
                        IRubyObject readItems = io.read(new IRubyObject[]{recv.getRuntime().newFixnum(1024*16)});
                        return buf.concat(readItems);
                    } else {

View Full Code Here

                        break;
                    }
                    if (_scheduler.numRunnables() > 0) {
                        n = sel.selectNow();
                    } else {
                        n = sel.select();
                    }
                } catch (IOException ignore) {
                    n = 0;
                    ignore.printStackTrace();
                }

View Full Code Here

                            }
                            key = getIOChannel().register(selector, hsStatus);
                        } else {
                            key.interestOps(hsStatus); // null warning supressed
                        }
                        int keyCount = selector.select(timeout);
                        if (keyCount == 0 && ((System.currentTimeMillis()-now) >= timeout)) {
                            throw new SocketTimeoutException(sm.getString("channel.nio.ssl.timeoutDuringHandshake"));
                        }
                        isReadable = key.isReadable();
                        isWriteable = key.isWritable();

View Full Code Here

            (selector, SelectionKey.OP_READ, null);


          int state = 0;
          ByteBuffer inBuffer = ByteBuffer.allocate(Message.length);
          loop: while (true) {
            selector.select();


            switch (state) {
            case 0: {
              if (outKey.isWritable()) {
                if (send) {

View Full Code Here

        // Write a byte from server to client
        server.getOutputStream().write(42);
        server.getOutputStream().flush();


        // select again and assert selection found for read
        selected = selector.select(1000);
        assertEquals(1,selected);
        assertEquals(1,selector.selectedKeys().size());
        assertTrue(key.isValid());
        assertTrue(key.isReadable());
        assertEquals(1,key.readyOps());

View Full Code Here

0 1 2 3 4 5 6 7 8 9

TOP

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.