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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.ConfigChangeType;
import org.apache.dubbo.common.config.configcenter.ConfigChangedEvent;
import org.apache.dubbo.common.config.configcenter.ConfigurationListener;
import org.apache.dubbo.common.utils.CollectionUtils;
import org.apache.dubbo.remoting.zookeeper.DataListener;
import org.apache.dubbo.remoting.zookeeper.EventType;
import java.util.Set;
import java.util.concurrent.CopyOnWriteArraySet;
/**
* one path has multi configurationListeners
*/
public class ZookeeperDataListener implements DataListener {
private String path;
private String key;
private String group;
private Set listeners;
public ZookeeperDataListener(String path, String key, String group) {
this.path = path;
this.key = key;
this.group = group;
this.listeners = new CopyOnWriteArraySet<>();
}
public void addListener(ConfigurationListener configurationListener) {
listeners.add(configurationListener);
}
public void removeListener(ConfigurationListener configurationListener) {
listeners.remove(configurationListener);
}
public Set getListeners() {
return listeners;
}
@Override
public void dataChanged(String path, Object value, EventType eventType) {
if (!this.path.equals(path)) {
return;
}
ConfigChangeType changeType;
if (EventType.NodeCreated.equals(eventType)) {
changeType = ConfigChangeType.ADDED;
} else if (value == null) {
changeType = ConfigChangeType.DELETED;
} else {
changeType = ConfigChangeType.MODIFIED;
}
ConfigChangedEvent configChangeEvent = new ConfigChangedEvent(key, group, (String) value, changeType);
if (CollectionUtils.isNotEmpty(listeners)) {
listeners.forEach(listener -> listener.process(configChangeEvent));
}
}
}