kafka SynchronizedCache 源码
kafka SynchronizedCache 代码
文件路径：/clients/src/main/java/org/apache/kafka/common/cache/SynchronizedCache.java
/*
* 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 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.apache.kafka.common.cache;
/**
* Wrapper for caches that adds simple synchronization to provide a thread-safe cache. Note that this simply adds
* synchronization around each cache method on the underlying unsynchronized cache. It does not add any support for
* atomically checking for existence of an entry and computing and inserting the value if it is missing.
*/
public class SynchronizedCache<K, V> implements Cache<K, V> {
private final Cache<K, V> underlying;
public SynchronizedCache(Cache<K, V> underlying) {
this.underlying = underlying;
}
@Override
public synchronized V get(K key) {
return underlying.get(key);
}
@Override
public synchronized void put(K key, V value) {
underlying.put(key, value);
}
@Override
public synchronized boolean remove(K key) {
return underlying.remove(key);
}
@Override
public synchronized long size() {
return underlying.size();
}
}
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