com.alibaba.nacos.common.cache.impl.SimpleCache Maven / Gradle / Ivy
/*
* Copyright 1999-2018 Alibaba Group Holding Ltd.
*
* 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 com.alibaba.nacos.common.cache.impl;
import com.alibaba.nacos.common.cache.Cache;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.Callable;
/**
* Simple implementation of {@code Cache}.
* @author zzq
* @date 2021/7/30
*/
public class SimpleCache implements Cache {
private Map cache;
public SimpleCache(int size) {
cache = new HashMap<>(size);
}
@Override
public void put(K key, V val) {
cache.put(key, val);
}
@Override
public V get(K key) {
return cache.get(key);
}
@Override
public V get(K key, Callable call) throws Exception {
if (cache.containsKey(key)) {
return cache.get(key);
} else {
V v2 = call.call();
cache.put(key, v2);
return v2;
}
}
@Override
public V remove(K key) {
return cache.remove(key);
}
@Override
public void clear() {
cache.clear();
}
@Override
public int getSize() {
return cache.size();
}
}