org.apache.hadoop.hbase.util

Class IdReadWriteLock

java.lang.Object

org.apache.hadoop.hbase.util.IdReadWriteLock

@InterfaceAudience.Private
public class IdReadWriteLock
extends Object

Allows multiple concurrent clients to lock on a numeric id with ReentrantReadWriteLock. The intended usage for read lock is as follows:

 ReentrantReadWriteLock lock = idReadWriteLock.getLock(id);
 try {
   lock.readLock().lock();
   // User code.
 } finally {
   lock.readLock().unlock();
 }
 

For write lock, use lock.writeLock()

Constructor Summary

Constructors

Constructor and Description
IdReadWriteLock()

Method Summary

Modifier and Type	Method and Description
ReentrantReadWriteLock	getLock(long id) Get the ReentrantReadWriteLock corresponding to the given id
void	waitForWaiters(long id, int numWaiters)

Methods inherited from class java.lang.Object

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

Constructor Detail

IdReadWriteLock

public IdReadWriteLock()

Method Detail

getLock

public ReentrantReadWriteLock getLock(long id)

Get the ReentrantReadWriteLock corresponding to the given id

Parameters:

id - an arbitrary number to identify the lock

waitForWaiters

public void waitForWaiters(long id,
                           int numWaiters)
                    throws InterruptedException

Throws:

InterruptedException