org.apache.lucene.store
Class Lock.With

java.lang.Object
  org.apache.lucene.store.Lock.With

Enclosing class:

Lock

public abstract static class Lock.With
extends Object

Utility class for executing code with exclusive access.

Constructor Summary

Lock.With(Lock lock, long lockWaitTimeout)
Constructs an executor that will grab the named lock.

Method Summary

protected abstract Object	doBody() Code to execute with exclusive access.
Object	run() Calls doBody() while lock is obtained.

Methods inherited from class java.lang.Object

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

Constructor Detail

Lock.With

public Lock.With(Lock lock,
                 long lockWaitTimeout)

Constructs an executor that will grab the named lock.

Method Detail

doBody

protected abstract Object doBody()
                          throws IOException

Code to execute with exclusive access.

Throws:

IOException

run

public Object run()
           throws LockObtainFailedException,
                  IOException

Calls doBody() while lock is obtained. Blocks if lock cannot be obtained immediately. Retries to obtain lock once per second until it is obtained, or until it has tried ten times. Lock is released when doBody() exits.

Throws:

LockObtainFailedException - if lock could not be obtained

IOException - if Lock.obtain() throws IOException