public void respondRequest() {
// Follow algorithm procedure to send token if necessary
if ((havePrivilege) && (!isRequesting) && (RN.get(lastRequest) == LN.get(lastRequest) + 1)) {
havePrivilege = false;
String encodedPrivilegeMsg = encodePrivelege(requestQueue, LN);
sendPrivelege(encodedPrivilegeMsg, lastRequest);
SocketAddress mSocketAddress =
new InetSocketAddress(
mConfigReader.getNodeConfig(lastRequest)[1],
Integer.parseInt(mConfigReader.getNodeConfig(lastRequest)[2]));
MessageInfo mMessageInfo = MessageInfo.createOutgoing(null, 0);
try {
SctpChannel mSctpChannel = SctpChannel.open();
mSctpChannel.connect(mSocketAddress);
ByteBuffer mByteBuffer = ByteBuffer.allocate(MESSAGE_SIZE);
mByteBuffer.put(encodedPrivilegeMsg.getBytes());
mByteBuffer.flip();
mSctpChannel.send(mByteBuffer, mMessageInfo);
System.out.println("Privilege Message sending to " + lastRequest);
} catch (Exception e) {
System.out.println("Exception: " + e);
}
}
}
@Override
protected int doReadMessages(List<Object> buf) throws Exception {
SctpChannel ch = javaChannel();
RecvByteBufAllocator.Handle allocHandle = unsafe().recvBufAllocHandle();
ByteBuf buffer = allocHandle.allocate(config().getAllocator());
boolean free = true;
try {
ByteBuffer data = buffer.internalNioBuffer(buffer.writerIndex(), buffer.writableBytes());
int pos = data.position();
MessageInfo messageInfo = ch.receive(data, null, notificationHandler);
if (messageInfo == null) {
return 0;
}
buf.add(
new SctpMessage(
messageInfo, buffer.writerIndex(buffer.writerIndex() + data.position() - pos)));
free = false;
return 1;
} catch (Throwable cause) {
PlatformDependent.throwException(cause);
return -1;
} finally {
int bytesRead = buffer.readableBytes();
allocHandle.record(bytesRead);
if (free) {
buffer.release();
}
}
}
@Override
public long transferTo(SctpChannel ch) throws IOException {
final MessageInfo messageInfo = MessageInfo.createOutgoing(ch.association(), null, streamNo);
messageInfo.payloadProtocolID(protocolId);
messageInfo.streamNumber(streamNo);
ch.send(buffer, messageInfo);
return writtenBytes();
}
public static void main(String[] args) {
Application app = new Application();
mSelfNodeID = Integer.parseInt(args[0]);
mConfigFile = args[1];
mConfigReader = new ConfigReader(mConfigFile);
app.initializeArrays();
/* create server to receive messages*/
mServer =
new SctpServer(
app,
mConfigReader.getNodeConfig(mSelfNodeID)[0],
mConfigReader.getNodeConfig(mSelfNodeID)[1],
mConfigReader.getNodeConfig(mSelfNodeID)[2],
mConfigReader.getNodeCount() - 1);
mServerThread = new Thread(mServer);
mServerThread.start();
// Timer to indicate when to request CS entry
TimerThread timer = new TimerThread(app);
new Thread(timer).start();
// Create a communication channel to every other node
for (int i = 0; i < mConfigReader.getNodeCount(); i++) {
if (i != mSelfNodeID) {
SocketAddress mSocketAddress =
new InetSocketAddress(
mConfigReader.getNodeConfig(i)[1],
Integer.parseInt(mConfigReader.getNodeConfig(i)[2]));
MessageInfo mMessageInfo = MessageInfo.createOutgoing(null, 0);
try {
SctpChannel mSctpChannel = SctpChannel.open();
mSctpChannel.connect(mSocketAddress);
ByteBuffer mByteBuffer = ByteBuffer.allocate(MESSAGE_SIZE);
mByteBuffer.put("test".getBytes());
mByteBuffer.flip();
mSctpChannel.send(mByteBuffer, mMessageInfo);
} catch (Exception e) {
System.out.println("Exception: " + e);
}
}
}
app.applicationModule();
app.testCorrectness();
System.exit(0);
}
private void registerAcceptedChannel(SctpChannel acceptedSocket, Thread currentThread) {
try {
ChannelPipeline pipeline = channel.getConfig().getPipelineFactory().getPipeline();
SctpWorker worker = nextWorker();
worker.register(
new SctpAcceptedChannel(
channel.getFactory(),
pipeline,
channel,
SctpServerPipelineSink.this,
acceptedSocket,
worker,
currentThread),
null);
} catch (Exception e) {
if (logger.isWarnEnabled()) {
logger.warn("Failed to initialize an accepted socket.", e);
}
try {
acceptedSocket.close();
} catch (IOException e2) {
if (logger.isWarnEnabled()) {
logger.warn("Failed to close a partially accepted socket.", e2);
}
}
}
}
private static SctpChannel newSctpChannel() {
try {
return SctpChannel.open();
} catch (IOException e) {
throw new ChannelException("Failed to open a sctp channel.", e);
}
}
/**
* Create a new instance
*
* @param parent the {@link Channel} which is the parent of this {@link NioSctpChannel} or {@code
* null}.
* @param sctpChannel the underlying {@link SctpChannel}
*/
public NioSctpChannel(Channel parent, SctpChannel sctpChannel) {
super(parent, sctpChannel, SelectionKey.OP_READ);
try {
sctpChannel.configureBlocking(false);
config = new NioSctpChannelConfig(this, sctpChannel);
notificationHandler = new SctpNotificationHandler(this);
} catch (IOException e) {
try {
sctpChannel.close();
} catch (IOException e2) {
if (logger.isWarnEnabled()) {
logger.warn("Failed to close a partially initialized sctp channel.", e2);
}
}
throw new ChannelException("Failed to enter non-blocking mode.", e);
}
}
// Send token to designated node
public void sendPrivelege(String message, int destID) {
isRequesting = false;
SocketAddress mSocketAddress =
new InetSocketAddress(
mConfigReader.getNodeConfig(destID)[1],
Integer.parseInt(mConfigReader.getNodeConfig(destID)[2]));
MessageInfo mMessageInfo = MessageInfo.createOutgoing(null, 0);
try {
SctpChannel mSctpChannel = SctpChannel.open();
mSctpChannel.connect(mSocketAddress);
ByteBuffer mByteBuffer = ByteBuffer.allocate(MESSAGE_SIZE);
mByteBuffer.put(message.getBytes());
mByteBuffer.flip();
mSctpChannel.send(mByteBuffer, mMessageInfo);
System.out.println("Sending token to " + destID);
} catch (Exception e) {
System.out.println("Exception: " + e);
}
}
// Send request message to all other nodes in system
public void broadcastRequest(String message) {
for (int i = 0; i < mConfigReader.getNodeCount(); i++) {
if (i != mSelfNodeID) {
SocketAddress mSocketAddress =
new InetSocketAddress(
mConfigReader.getNodeConfig(i)[1],
Integer.parseInt(mConfigReader.getNodeConfig(i)[2]));
MessageInfo mMessageInfo = MessageInfo.createOutgoing(null, 0);
try {
SctpChannel mSctpChannel = SctpChannel.open();
mSctpChannel.connect(mSocketAddress);
ByteBuffer mByteBuffer = ByteBuffer.allocate(MESSAGE_SIZE);
mByteBuffer.put(message.getBytes());
mByteBuffer.flip();
mSctpChannel.send(mByteBuffer, mMessageInfo);
System.out.println("Sending request " + message + "to " + i);
} catch (Exception e) {
System.out.println("Exception: " + e);
}
}
}
}
@Override
public boolean isActive() {
SctpChannel ch = javaChannel();
return ch.isOpen() && association() != null;
}
