Class NioReplicationTask
java.lang.Object
org.apache.catalina.tribes.transport.AbstractRxTask
org.apache.catalina.tribes.transport.nio.NioReplicationTask
- All Implemented Interfaces:
Runnable
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.
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Field Summary
Fields inherited from class org.apache.catalina.tribes.transport.AbstractRxTask
OPTION_DIRECT_BUFFER, useBufferPool
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Constructor Summary
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Method Summary
Modifier and TypeMethodDescriptionprotected void
drainChannel
(SelectionKey key, ObjectReader reader) The actual code which drains the channel associated with the given key.int
protected void
registerForRead
(SelectionKey key, ObjectReader reader) void
run()
protected void
sendAck
(SelectionKey key, WritableByteChannel channel, byte[] command, SocketAddress udpaddr) Send a reply-acknowledgement (6,2,3), sends it doing a busy write, the ACK is so small that it should always go to the buffer.void
Called to initiate a unit of work by this worker thread on the provided SelectionKey object.void
setRxBufSize
(int rxBufSize) Methods inherited from class org.apache.catalina.tribes.transport.AbstractRxTask
close, getCallback, getOptions, getTaskPool, getUseBufferPool, setCallback, setOptions, setTaskPool, setUseBufferPool
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Field Details
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sm
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Constructor Details
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NioReplicationTask
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Method Details
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run
public void run() -
serviceChannel
Called to initiate a unit of work by this worker thread on the provided SelectionKey object. This method is synchronized, as is the run() method, so only one key can be serviced at a given time. Before waking the worker thread, and before returning to the main selection loop, this key's interest set is updated to remove OP_READ. This will cause the selector to ignore read-readiness for this channel while the worker thread is servicing it.- Parameters:
key
- The key to process
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drainChannel
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.- Parameters:
key
- The key to processreader
- The reader- Throws:
Exception
- IO error
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registerForRead
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sendAck
protected void sendAck(SelectionKey key, WritableByteChannel channel, byte[] command, SocketAddress udpaddr) Send a reply-acknowledgement (6,2,3), sends it doing a busy write, the ACK is so small that it should always go to the buffer.- Parameters:
key
- The key to usechannel
- The channelcommand
- The command to writeudpaddr
- Target address
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setRxBufSize
public void setRxBufSize(int rxBufSize) -
getRxBufSize
public int getRxBufSize()
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