/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIESOR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.aries.blueprint.utils.threading;
import java.util.concurrent.Callable;
import java.util.concurrent.locks.ReentrantReadWriteLock;
import java.util.concurrent.locks.ReentrantReadWriteLock.ReadLock;
import java.util.concurrent.locks.ReentrantReadWriteLock.WriteLock;
public class RWLock
{
private ReentrantReadWriteLock _lock = new ReentrantReadWriteLock();
public <T> T runReadOperation(Callable<T> call) throws Exception
{
ReadLock rl = _lock.readLock();
rl.lock();
try {
return call.call();
} finally {
rl.unlock();
}
}
public void runReadOperation(Runnable r)
{
ReadLock rl = _lock.readLock();
rl.lock();
try {
r.run();
} finally {
rl.unlock();
}
}
public <T> T runWriteOperation(Callable<T> call) throws Exception
{
WriteLock wl = _lock.writeLock();
wl.lock();
try {
return call.call();
} finally {
wl.unlock();
}
}
public void runWriteOperation(Runnable r)
{
WriteLock wl = _lock.writeLock();
wl.lock();
try {
r.run();
} finally {
wl.unlock();
}
}
}