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/*
* 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.dubbo.configcenter.support.zookeeper;
import org.apache.dubbo.common.config.configcenter.ConfigurationListener;
import org.apache.dubbo.common.utils.CollectionUtils;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
/**
* one path has one zookeeperDataListener
*/
public class CacheListener {
private Map pathKeyListeners = new ConcurrentHashMap<>();
public CacheListener() {
}
public ZookeeperDataListener addListener(String pathKey, ConfigurationListener configurationListener, String key, String group) {
ZookeeperDataListener zookeeperDataListener = pathKeyListeners.computeIfAbsent(pathKey,
_pathKey -> new ZookeeperDataListener(_pathKey, key, group));
zookeeperDataListener.addListener(configurationListener);
return zookeeperDataListener;
}
public ZookeeperDataListener removeListener(String pathKey, ConfigurationListener configurationListener) {
ZookeeperDataListener zookeeperDataListener = pathKeyListeners.get(pathKey);
if (zookeeperDataListener != null) {
zookeeperDataListener.removeListener(configurationListener);
if (CollectionUtils.isEmpty(zookeeperDataListener.getListeners())) {
pathKeyListeners.remove(pathKey);
}
}
return zookeeperDataListener;
}
public ZookeeperDataListener getCachedListener(String pathKey) {
return pathKeyListeners.get(pathKey);
}
public Map getPathKeyListeners() {
return pathKeyListeners;
}
public void clear() {
pathKeyListeners.clear();
}
}