org.apache.catalina.tribes.transport.bio

## Class BioReplicationTask

- java.lang.Object
- - org.apache.catalina.tribes.transport.AbstractRxTask
  - - org.apache.catalina.tribes.transport.bio.BioReplicationTask

- All Implemented Interfaces:
    Runnable

      public class BioReplicationTask
      extends AbstractRxTask

  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.

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `protected ObjectReader` | `reader`
    `protected static StringManager` | `sm`
    `protected Socket` | `socket`

    - ### Fields inherited from class org.apache.catalina.tribes.transport.AbstractRxTask

      `OPTION_DIRECT_BUFFER, useBufferPool`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `BioReplicationTask(ListenCallback callback)`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `close()`
    `protected void` | `drainSocket()` The actual code which drains the channel associated with the given key.
    `protected void` | `execute(ObjectReader reader)`
    `void` | `run()`
    `protected void` | `sendAck(byte[] command)` Send a reply-acknowledgment (6,2,3)
    `void` | `serviceSocket(Socket socket, ObjectReader reader)`

    - ### Methods inherited from class org.apache.catalina.tribes.transport.AbstractRxTask

      `getCallback, getOptions, getTaskPool, getUseBufferPool, isDoRun, setCallback, setDoRun, setOptions, setTaskPool, setUseBufferPool`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Field Detail

    - #### sm

          protected static final StringManager sm

    - #### socket

          protected Socket socket

    - #### reader

          protected ObjectReader reader

  - ### Constructor Detail

    - #### BioReplicationTask

          public BioReplicationTask(ListenCallback callback)

  - ### Method Detail

    - #### run

          public void run()

    - #### serviceSocket

          public void serviceSocket(Socket socket,
                           ObjectReader reader)

    - #### execute

          protected void execute(ObjectReader reader)
                          throws Exception

      Throws:
        `Exception`

    - #### drainSocket

          protected void drainSocket()
                              throws 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.
      Throws:
        `Exception` - IO exception or execute exception

    - #### sendAck

          protected void sendAck(byte[] command)

      Send a reply-acknowledgment (6,2,3)
      Parameters:
        `command` - The command to write

    - #### close

          public void close()

      Overrides:
        `close` in class `AbstractRxTask`

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