Examples of org.jgroups.JChannel

org.jgroups.JChannel
JChannel is a pure Java implementation of Channel. When a JChannel object is instantiated it automatically sets up the protocol stack.
Properties
Properties are used to configure a channel, and are accepted in several forms; the String form is described here. A property string consists of a number of properties separated by colons. For example:
```
"<prop1>(arg1=val1):<prop2>(arg1=val1;arg2=val2):<prop3>:<propn>"
```
Each property relates directly to a protocol layer, which is implemented as a Java class. When a protocol stack is to be created based on the above property string, the first property becomes the bottom-most layer, the second one will be placed on the first, etc.: the stack is created from the bottom to the top, as the string is parsed from left to right. Each property has to be the name of a Java class that resides in the {@link org.jgroups.protocols} package.
Note that only the base name has to be given, not the fully specified class name (e.g., UDP instead of org.jgroups.protocols.UDP).
Each layer may have 0 or more arguments, which are specified as a list of name/value pairs in parentheses directly after the property. In the example above, the first protocol layer has 1 argument, the second 2, the third none. When a layer is created, these properties (if there are any) will be set in a layer by invoking the layer's setProperties() method
As an example the property string below instructs JGroups to create a JChannel with protocols UDP, PING, FD and GMS:
```
"UDP(mcast_addr=228.10.9.8;mcast_port=5678):PING:FD:GMS"
```
The UDP protocol layer is at the bottom of the stack, and it should use mcast address 228.10.9.8. and port 5678 rather than the default IP multicast address and port. The only other argument instructs FD to output debug information while executing. Property UDP refers to a class {@link org.jgroups.protocols.UDP}, which is subsequently loaded and an instance of which is created as protocol layer. If any of these classes are not found, an exception will be thrown and the construction of the stack will be aborted. @author Bela Ban @version $Id: JChannel.java,v 1.106.2.1 2006/12/04 22:47:16 vlada Exp $

        int num_msgs=1000, num_sent=0, group_port=7500, num_yields=0;
        DatagramPacket packet;
        InetAddress group_addr=null;
        int[][] matrix;
        boolean jg=false; // use JGroups channel instead of UDP MulticastSocket
        JChannel channel=null;
        String group_name="SpeedTest-Group";
        Message send_msg;
        boolean debug=false, cummulative=false, busy_sleep=false, yield=false, loopback=false;
        Debugger debugger=null;
        long sleep_time=1; // sleep in msecs between msg sends
        ExposedByteArrayOutputStream output=new ExposedByteArrayOutputStream(64);
        String props;




        props="UDP(mcast_addr=224.0.0.36;mcast_port=55566;ip_ttl=32;" +
                "ucast_send_buf_size=32000;ucast_recv_buf_size=64000;" +
                "mcast_send_buf_size=32000;mcast_recv_buf_size=64000):" +
                "PING(timeout=2000;num_initial_members=3):" +
                "MERGE2(min_interval=5000;max_interval=10000):" +
                "FD_SOCK:" +
                "VERIFY_SUSPECT(timeout=1500):" +
                "pbcast.NAKACK(max_xmit_size=8192;gc_lag=50;retransmit_timeout=600,800,1200,2400,4800):" +
                "UNICAST(timeout=1200):" +
                "pbcast.STABLE(desired_avg_gossip=10000):" +
                "FRAG(frag_size=8192;down_thread=false;up_thread=false):" +
                "pbcast.GMS(join_timeout=5000;join_retry_timeout=2000;" +
                "shun=false;print_local_addr=true):" +
                "pbcast.STATE_TRANSFER";
                //  "PERF(details=true)";






        for(int i=0; i < args.length; i++) {
            if("-help".equals(args[i])) {
                help();
                return;
            }
            if("-jg".equals(args[i])) {
                jg=true;
                continue;
            }
            if("-loopback".equals(args[i])) {
                loopback=true;
                continue;
            }
            if("-props".equals(args[i])) {
                props=args[++i];
                continue;
            }
            if("-debug".equals(args[i])) {
                debug=true;
                continue;
            }
            if("-cummulative".equals(args[i])) {
                cummulative=true;
                continue;
            }
            if("-busy_sleep".equals(args[i])) {
                busy_sleep=true;
                continue;
            }
            if("-yield".equals(args[i])) {
                yield=true;
                num_yields++;
                continue;
            }
            if("-sleep".equals(args[i])) {
                sleep_time=Long.parseLong(args[++i]);
                continue;
            }
            if("-num_msgs".equals(args[i])) {
                num_msgs=Integer.parseInt(args[++i]);
                continue;
            }
            help();
            return;
        }


        System.out.println("jg       = " + jg +
                "\nloopback = " + loopback +
                "\ndebug    = " + debug +
                "\nsleep    = " + sleep_time +
                "\nbusy_sleep=" + busy_sleep +
                "\nyield=" + yield +
                "\nnum_yields=" + num_yields +
                "\nnum_msgs = " + num_msgs +
                           '\n');






        try {
            matrix=new int[num_msgs][2];
            for(int i=0; i < num_msgs; i++) {
                for(int j=0; j < matrix[i].length; j++)
                    matrix[i][j]=0;
            }


            if(jg) {
                if(loopback) {
                    ProtocolStackConfigurator conf=ConfiguratorFactory.getStackConfigurator(props);
                    String tmp=conf.getProtocolStackString();
                    int index=tmp.indexOf(':');
                    props=LOOPBACK + tmp.substring(index);
                }
                channel=new JChannel(props);
                // System.out.println("props:\n" + channel.getProperties());
                channel.connect(group_name);
                if(debug) {
                    debugger=new Debugger(channel, cummulative);
                    debugger.start();
                }
            }
            else {
                group_addr=InetAddress.getByName("224.0.0.36");
                sock=new DatagramSocket();
            }


            if(debug) {
                System.out.println("Press key to start");
                System.in.read();
            }
            receiver=new Receiver(group_addr, group_port, channel, matrix, jg);
            receiver.start();


            byte[] buf;
            DataOutputStream out;


            start=System.currentTimeMillis();
            for(int i=0; i < num_msgs; i++) {
                // buf=Util.objectToByteBuffer(new Integer(i));
                output.reset();
                out=new DataOutputStream(output);
                out.writeInt(i);
                out.flush();
                buf=output.getRawBuffer();
                out.close();


                if(jg) {
                    send_msg=new Message(null, null, buf, 0, buf.length);
                    channel.send(send_msg);
                }
                else {
                    packet=new DatagramPacket(buf, buf.length, group_addr, group_port);
                    sock.send(packet);
                }

View Full Code Here


    }


    public void setUp(String props) {
        try {
            channel=new JChannel(props);
            channel.connect("test1");
        }
        catch(Throwable t) {
            t.printStackTrace(System.err);
            fail("channel could not be created");

View Full Code Here

     * timeout.
     *
     * @throws Exception
     */
    public void testOneChannel() throws Exception {
        JChannel channel = new JChannel();
        ServerObject serverObject = new ServerObject("obj1");
        RpcDispatcher disp=new RpcDispatcher(channel, null, null, serverObject, DEADLOCK_DETECTION);
        serverObject.setRpcDispatcher(disp);
        channel.connect(name);
        Address localAddress = channel.getLocalAddress();


        // call the nested group method on itself
        MethodCall call = new MethodCall("outerMethod", new Object[0], new Class[0]);
        log("calling outerMethod() on all members");
        RspList rspList = disp.callRemoteMethods(null, call, GroupRequest.GET_ALL, 0);
        log("results of outerMethod(): " + rspList);


        assertEquals(1, rspList.size());
        assertEquals("outerMethod[innerMethod]", rspList.getValue(localAddress));
        assertTrue(rspList.isReceived(localAddress));
        assertFalse(rspList.isSuspected(localAddress));


        channel.disconnect();
        channel.close();


    }

View Full Code Here

     *
     */
    public void testTwoChannels() throws Throwable {
        ServerObject obj1, obj2 = null;


        JChannel c1 = new JChannel();
        obj1 = new ServerObject("obj1");
        RpcDispatcher disp1=new RpcDispatcher(c1, null, null, obj1, DEADLOCK_DETECTION);
        obj1.setRpcDispatcher(disp1);
        c1.connect(name);


        JChannel c2 = new JChannel();
        obj2 = new ServerObject("obj2");
        RpcDispatcher disp2=new RpcDispatcher(c2, null, null, obj2, DEADLOCK_DETECTION);
        obj2.setRpcDispatcher(disp2);
        c2.connect(name);
        Address localAddress2 = c2.getLocalAddress();


        try {
            // call a point-to-point method on Member 2 that triggers a nested distributed RPC
            MethodCall call = new MethodCall("outerMethod", new Object[0], new Class[0]);
            log("calling outerMethod() on " + localAddress2);
            Object retval = disp1.callRemoteMethod(localAddress2, call, GroupRequest.GET_ALL, 0);
            log("results of outerMethod(): " + retval);
        }
        finally {
            c2.close();
            c1.close();
        }
    }

View Full Code Here




    public void testTwoChannelsWithInitialMulticast() throws Exception {
        ServerObject obj1, obj2 = null;


        JChannel c1 = new JChannel();
        obj1 = new ServerObject("obj1");
        RpcDispatcher disp1=new RpcDispatcher(c1, null, null, obj1, DEADLOCK_DETECTION);
        obj1.setRpcDispatcher(disp1);
        c1.connect(name);


        JChannel c2 = new JChannel();
        obj2 = new ServerObject("obj2");
        RpcDispatcher disp2=new RpcDispatcher(c2, null, null, obj2, DEADLOCK_DETECTION);
        obj2.setRpcDispatcher(disp2);
        c2.connect(name);


        Vector dests=new Vector();
        dests.add(c1.getLocalAddress());
        dests.add(c2.getLocalAddress());


        try {
            // call a point-to-point method on Member 2 that triggers a nested distributed RPC
            MethodCall call = new MethodCall("outerMethod", new Object[0], new Class[0]);
            log("calling outerMethod() on all members");
            RspList rsps = disp1.callRemoteMethods(dests, call, GroupRequest.GET_ALL, 0);
            log("results of outerMethod():\n" + rsps);
            assertEquals(2, rsps.size());
        }
        finally {
            c2.close();
            c1.close();
        }
    }

View Full Code Here


      protected Channel createChannel(String configFile, Map channelOptions) throws Exception
      {
         Channel ch = null;
         log.info("Using configuration file " + configFile);
         ch = new JChannel(configFile);
         for (Iterator iter = channelOptions.keySet().iterator(); iter.hasNext();)
         {
            Integer key = (Integer) iter.next();
            Object value = channelOptions.get(key);
            ch.setOpt(key.intValue(), value);

View Full Code Here

    public GroupMember(boolean pullMode, boolean dispMode, int size) {
      setStateSize(size * MEGABYTE);
      setUsePullMode(pullMode);
      setUseDispatcher(dispMode);
      try {
        ch = new JChannel(CHANNEL_PROPS);
        ch.setOpt(Channel.AUTO_RECONNECT, Boolean.TRUE);
        ch.setOpt(Channel.AUTO_GETSTATE, Boolean.TRUE);
        ch.setOpt(Channel.BLOCK, Boolean.TRUE);
        if (useDispacher) {
          RpcDispatcher disp = new RpcDispatcher(ch, this, this, this);

View Full Code Here


    protected void setUp() throws Exception {
        super.setUp();
        props = System.getProperty("props",props);   
        log("Using configuration file " + props);
        provider=new JChannel(props);
        requester=new JChannel(props);
    }

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        super(name);
    }


    public void setUp() throws Exception {
        super.setUp();
        ch1=new JChannel(props);
        ch1.connect(GROUP);


        ch2=new JChannel(props);
        ch2.connect(GROUP);


        ch3=new JChannel(props);
        ch3.connect(GROUP);
    }

View Full Code Here

        byte[] buf;
        DatagramPacket packet;
        InetAddress group_addr=null;
        int[][] matrix;
        boolean jg=false; // use JGroups channel instead of UDP MulticastSocket
        JChannel channel=null;
        String props=null, loopback_props;
        String group_name="SpeedTest-Group";
        Message send_msg;
        boolean debug=false, cummulative=false;
        Debugger debugger=null;
        long sleep_time=1; // sleep in msecs between msg sends
        boolean busy_sleep=false;
        boolean yield=false;
        int num_yields=0;
        boolean loopback=false;




        props="UDP(mcast_addr=224.0.0.36;mcast_port=55566;ip_ttl=32;" +
                "ucast_send_buf_size=32000;ucast_recv_buf_size=64000;" +
                "mcast_send_buf_size=32000;mcast_recv_buf_size=64000):" +
                "PING(timeout=2000;num_initial_members=3):" +
                "MERGE2(min_interval=5000;max_interval=10000):" +
                "FD_SOCK:" +
                "VERIFY_SUSPECT(timeout=1500):" +
                "pbcast.NAKACK(max_xmit_size=8192;gc_lag=50;retransmit_timeout=600,800,1200,2400,4800):" +
                "UNICAST(timeout=1200):" +
                "pbcast.STABLE(desired_avg_gossip=10000):" +
                "FRAG(frag_size=8192;down_thread=false;up_thread=false):" +
// "PIGGYBACK(max_size=16000;max_wait_time=500):" +
                "pbcast.GMS(join_timeout=5000;join_retry_timeout=2000;" +
                "shun=false;print_local_addr=true):" +
                "pbcast.STATE_TRANSFER";
        // "PERF(details=true)";




        loopback_props="LOOPBACK:" +
                "PING(timeout=2000;num_initial_members=3):" +
                "MERGE2(min_interval=5000;max_interval=10000):" +
                "FD_SOCK:" +
                "VERIFY_SUSPECT(timeout=1500):" +
                "pbcast.NAKACK(gc_lag=50;retransmit_timeout=600,800,1200,2400,4800):" +
                "UNICAST(timeout=5000):" +
                "pbcast.STABLE(desired_avg_gossip=20000):" +
                "FRAG(frag_size=16000;down_thread=false;up_thread=false):" +
                "pbcast.GMS(join_timeout=5000;join_retry_timeout=2000;" +
                "shun=false;print_local_addr=true):" +
                "pbcast.STATE_TRANSFER";




        for(int i=0; i < args.length; i++) {
            if("-help".equals(args[i])) {
                help();
                return;
            }
            if("-jg".equals(args[i])) {
                jg=true;
                continue;
            }
            if("-loopback".equals(args[i])) {
                loopback=true;
                props=loopback_props;
                continue;
            }
            if("-props".equals(args[i])) {
                props=args[++i];
                continue;
            }
            if("-debug".equals(args[i])) {
                debug=true;
                continue;
            }
            if("-cummulative".equals(args[i])) {
                cummulative=true;
                continue;
            }
            if("-busy_sleep".equals(args[i])) {
                busy_sleep=true;
                continue;
            }
            if("-yield".equals(args[i])) {
                yield=true;
                num_yields++;
                continue;
            }
            if("-sleep".equals(args[i])) {
                sleep_time=Long.parseLong(args[++i]);
                continue;
            }
            if("-num_msgs".equals(args[i])) {
                num_msgs=Integer.parseInt(args[++i]);
                continue;
            }
            help();
            return;
        }


        System.out.println("jg       = " + jg +
                "\nloopback = " + loopback +
                "\ndebug    = " + debug +
                "\nsleep    = " + sleep_time +
                "\nbusy_sleep=" + busy_sleep +
                "\nyield=" + yield +
                "\nnum_yields=" + num_yields +
                "\nnum_msgs = " + num_msgs +
                           '\n');






        try {
            matrix=new int[num_msgs][2];
            for(int i=0; i < num_msgs; i++) {
                for(int j=0; j < matrix[i].length; j++)
                    matrix[i][j]=0;
            }


            if(jg) {
                channel=new JChannel(props);
                channel.connect(group_name);
                if(debug) {
                    debugger=new Debugger(channel, cummulative);
                    debugger.start();
                }
            }
            else {
                group_addr=InetAddress.getByName("224.0.0.36");
                sock=new MulticastSocket(7777);
                sock.joinGroup(group_addr);
            }


            if(debug) {
                System.out.println("Press key to start");
                System.in.read();
            }
            receiver=new Receiver(sock, channel, matrix, jg);
            receiver.start();


            ByteBuffer bb=ByteBuffer.allocate(16);
            bb.mark();


            start=System.currentTimeMillis();
            for(int i=0; i < num_msgs; i++) {
                bb.reset();
                bb.putInt(i);
                buf=(byte[])(bb.array()).clone();


                if(jg) {
                    send_msg=new Message(null, null, buf);
                    channel.send(send_msg);
                }
                else {
                    packet=new DatagramPacket(buf, buf.length, group_addr, 7777);
                    sock.send(packet);
                }

View Full Code Here

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