/*
* Copyright 1999-2011 Alibaba Group.
*
* 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.dubbo.common.store.support;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import com.alibaba.dubbo.common.store.DataStore;
/**
* @author <a href="mailto:ding.lid@alibaba-inc.com">ding.lid</a>
* @author <a href="mailto:gang.lvg@alibaba-inc.com">kimi</a>
*/
public class SimpleDataStore implements DataStore {
// <组件类名或标识, <数据名, 数据值>>
private ConcurrentMap<String, ConcurrentMap<String, Object>> data =
new ConcurrentHashMap<String, ConcurrentMap<String,Object>>();
public Map<String, Object> get(String componentName) {
ConcurrentMap<String, Object> value = data.get(componentName);
if(value == null) return new HashMap<String, Object>();
return new HashMap<String, Object>(value);
}
public Object get(String componentName, String key) {
if (!data.containsKey(componentName)) {
return null;
}
return data.get(componentName).get(key);
}
public void put(String componentName, String key, Object value) {
Map<String, Object> componentData = data.get(componentName);
if(null == componentData) {
data.putIfAbsent(componentName, new ConcurrentHashMap<String, Object>());
componentData = data.get(componentName);
}
componentData.put(key, value);
}
public void remove(String componentName, String key) {
if (!data.containsKey(componentName)) {
return;
}
data.get(componentName).remove(key);
}
}