org.terracotta.offheapstore.WriteLockedOffHeapHashMap Maven / Gradle / Ivy
Show all versions of offheap-store Show documentation
/*
* Copyright 2015 Terracotta, Inc., a Software AG company.
*
* Licensed 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 WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.terracotta.offheapstore;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
import java.util.concurrent.locks.ReentrantReadWriteLock;
import org.terracotta.offheapstore.paging.PageSource;
import org.terracotta.offheapstore.storage.StorageEngine;
/**
* An exclusive-read/write off-heap hash-map.
*
* This map uses a regular {@code ReentrantLock} to provide exclusive read and
* write operations.
*
* @param the type of keys maintained by this map
* @param the type of mapped values
*
* @author Chris Dennis
*/
public class WriteLockedOffHeapHashMap extends AbstractLockedOffHeapHashMap{
private final Lock lock = new ReentrantLock();
public WriteLockedOffHeapHashMap(PageSource tableSource, StorageEngine super K, ? super V> storageEngine) {
super(tableSource, storageEngine);
}
public WriteLockedOffHeapHashMap(PageSource tableSource, StorageEngine super K, ? super V> storageEngine, int tableSize) {
super(tableSource, storageEngine, tableSize);
}
@Override
public Lock readLock() {
return lock;
}
@Override
public Lock writeLock() {
return lock;
}
@Override
public ReentrantReadWriteLock getLock() {
throw new UnsupportedOperationException();
}
}