Class TcpReplicationThread

  extended byjava.lang.Thread
      extended byorg.apache.catalina.cluster.tcp.WorkerThread
          extended byorg.apache.catalina.cluster.tcp.TcpReplicationThread
All Implemented Interfaces:

public class TcpReplicationThread
extends WorkerThread

A worker thread class which can drain channels and echo-back the input. Each instance is constructed with a reference to the owning thread pool object. When started, the thread loops forever waiting to be awakened to service the channel associated with a SelectionKey object. The worker is tasked by calling its serviceChannel() method with a SelectionKey object. The serviceChannel() method stores the key reference in the thread object then calls notify() to wake it up. When the channel has been drained, the worker thread returns itself to its parent pool.

$Id: 939539 2010-04-30 01:31:33Z kkolinko $
Filip Hanik

Field Summary
static byte[] ACK_COMMAND
Fields inherited from class org.apache.catalina.cluster.tcp.WorkerThread
doRun, pool
Fields inherited from class java.lang.Thread
Method Summary
protected  void drainChannel(java.nio.channels.SelectionKey key)
          The actual code which drains the channel associated with the given key.
 void run()
protected  void sendAck(java.nio.channels.SelectionKey key, java.nio.channels.SocketChannel channel)
          send a reply-acknowledgement (6,2,3)
Methods inherited from class org.apache.catalina.cluster.tcp.WorkerThread
close, getPool, setPool
Methods inherited from class java.lang.Thread
activeCount, checkAccess, countStackFrames, currentThread, destroy, dumpStack, enumerate, getContextClassLoader, getName, getPriority, getThreadGroup, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setName, setPriority, sleep, sleep, start, stop, stop, suspend, toString, yield
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail


public static final byte[] ACK_COMMAND
Method Detail


public void run()


protected void drainChannel(java.nio.channels.SelectionKey key)
                     throws java.lang.Exception
The actual code which drains the channel associated with the given key. This method assumes the key has been modified prior to invocation to turn off selection interest in OP_READ. When this method completes it re-enables OP_READ and calls wakeup() on the selector so the selector will resume watching this channel.



protected void sendAck(java.nio.channels.SelectionKey key,
                       java.nio.channels.SocketChannel channel)
send a reply-acknowledgement (6,2,3)

key -
channel -

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