public static void main(String[] args) {
try {
new UnicastChannelTest().start(args);
} catch (Exception ex) {
ex.printStackTrace();
}
}
/** Execute when new member join or leave Group */
public void viewAccepted(View v) {
memberSize = v.size();
if (mainFrame != null) setTitle();
members.clear();
members.addAll(v.getMembers());
if (v instanceof MergeView) {
System.out.println("** " + v);
// This is a simple merge function, which fetches the state from the coordinator
// on a merge and overwrites all of its own state
if (useState && !members.isEmpty()) {
Address coord = members.get(0);
Address local_addr = channel.getAddress();
if (local_addr != null && !local_addr.equals(coord)) {
try {
// make a copy of our state first
Map<Point, Color> copy = null;
if (send_own_state_on_merge) {
synchronized (drawPanel.state) {
copy = new LinkedHashMap<Point, Color>(drawPanel.state);
}
}
System.out.println("fetching state from " + coord);
channel.getState(coord, 5000);
if (copy != null)
sendOwnState(copy); // multicast my own state so everybody else has it too
} catch (Exception e) {
e.printStackTrace();
}
}
}
} else System.out.println("** View=" + v);
}
/** When receive a message, analyze message content and then execute the command: Draw or Clear */
public void receive(Message msg) {
byte[] buf = msg.getRawBuffer();
if (buf == null) {
System.err.println(
"["
+ channel.getAddress()
+ "] received null buffer from "
+ msg.getSrc()
+ ", headers: "
+ msg.printHeaders());
return;
}
try {
DrawCommand comm =
(DrawCommand)
Util.streamableFromByteBuffer(
DrawCommand.class, buf, msg.getOffset(), msg.getLength());
switch (comm.mode) {
case DrawCommand.DRAW:
if (drawPanel != null) drawPanel.drawPoint(comm);
break;
case DrawCommand.CLEAR:
clearPanel();
default:
System.err.println("***** received invalid draw command " + comm.mode);
break;
}
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* used to reconstitute public key sent in byte form from peer
*
* @param encodedKey
* @return PublicKey
*/
private PublicKey generatePubKey(byte[] encodedKey) {
PublicKey pubKey = null;
try {
KeyFactory KeyFac = KeyFactory.getInstance(getAlgorithm(asymAlgorithm));
X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(encodedKey);
pubKey = KeyFac.generatePublic(x509KeySpec);
} catch (Exception e) {
e.printStackTrace();
}
return pubKey;
}
/** Execute when disconnected from Group */
public void channelDisconnected(Channel channel) {
if (jmx) {
MBeanServer server = Util.getMBeanServer();
if (server != null) {
try {
JmxConfigurator.unregisterChannel((JChannel) channel, server, groupName);
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
public void run() {
for (int i = 1; i <= number_of_msgs; i++) {
try {
Message msg = new Message(destination, buf);
if (oob) msg.setFlag(Message.Flag.OOB);
if (dont_bundle) msg.setFlag(Message.Flag.DONT_BUNDLE);
if (i > 0 && print > 0 && i % print == 0) System.out.println("-- sent " + i);
channel.send(msg);
if (sleep_time > 0) Util.sleep(sleep_time);
} catch (Exception e) {
e.printStackTrace();
}
}
}
public void run() {
try {
latch.await();
} catch (InterruptedException e) {
e.printStackTrace();
}
for (int i = 0; i < NUM_MSGS; i++) {
try {
Message msg = new Message(dest, null, buf);
ch.send(msg);
} catch (Exception e) {
e.printStackTrace();
}
}
}
public void receive(Message msg) {
Message reply = new Message(msg.getSrc());
try {
System.out.println(
"-- MySimpleReplier["
+ channel.getAddress()
+ "]: received message from "
+ msg.getSrc());
if (handle_requests) {
System.out.println(", sending reply");
channel.send(reply);
} else System.out.println("\n");
} catch (Exception e) {
e.printStackTrace();
}
}
public void run() {
Random r = new Random();
while (true) {
Util.sleep(10);
try {
if (transmitting) {
channel.send(new Message(null, null, new TotalPayload(r.nextInt(255))));
} else {
Util.sleep(200);
}
} catch (Exception e) {
e.printStackTrace();
}
}
}