/*
 * Copyright 2017 eagle.jfaster.org.
 * <p>
 * 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.
 * </p>
 */

package eagle.jfaster.org.listener;

import eagle.jfaster.org.CoordinatorRegistryCenter;
import eagle.jfaster.org.config.common.MergeConfig;
import eagle.jfaster.org.logging.InternalLogger;
import eagle.jfaster.org.logging.InternalLoggerFactory;
import eagle.jfaster.org.registry.ServiceChangeListener;
import eagle.jfaster.org.util.PathUtil;
import lombok.RequiredArgsConstructor;

import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.state.ConnectionState;
import org.apache.curator.framework.state.ConnectionStateListener;

/**
 * zk连接监听器
 *
 * Created by fangyanpeng on 2017/8/18.
 */
@RequiredArgsConstructor
public class ZkConnectionStatListener implements ConnectionStateListener {

    private static final InternalLogger logger = InternalLoggerFactory.getInstance(ZkConnectionStatListener.class);

    //zk地址配置
    private final MergeConfig registryConfig;

    //节点变化通知
    private final ServiceChangeListener changeListener;

    //注册中心
    private final CoordinatorRegistryCenter registryCenter;

    //refer监听地址
    private final String servicePath;

    @Override
    public void stateChanged(CuratorFramework curatorFramework, ConnectionState state) {
        if (ConnectionState.SUSPENDED == state || ConnectionState.LOST == state) {
            logger.info(String.format("%s has lost connection from zookeeper", servicePath));
        } else if (ConnectionState.RECONNECTED == state) {
            try {
                PathUtil.rebalance(registryCenter, registryConfig, changeListener, servicePath);
            } catch (Exception e) {
                logger.error(String.format("%s connection reconnected to rebalance error", servicePath), e);
            }
        }
    }
}