/*
* Copyright (C) 2010-2101 Alibaba Group Holding Limited.
*
* 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.otter.shared.arbitrate.impl.setl;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.I0Itec.zkclient.exception.ZkException;
import org.I0Itec.zkclient.exception.ZkNoNodeException;
import org.I0Itec.zkclient.exception.ZkNodeExistsException;
import org.apache.zookeeper.CreateMode;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.util.Assert;
import com.alibaba.otter.shared.arbitrate.exception.ArbitrateException;
import com.alibaba.otter.shared.arbitrate.impl.ArbitrateEvent;
import com.alibaba.otter.shared.arbitrate.impl.setl.helper.RemedyIndexComparator;
import com.alibaba.otter.shared.arbitrate.impl.setl.helper.StagePathUtils;
import com.alibaba.otter.shared.arbitrate.impl.setl.monitor.PermitMonitor;
import com.alibaba.otter.shared.arbitrate.impl.zookeeper.ZooKeeperClient;
import com.alibaba.otter.shared.arbitrate.model.RemedyIndexEventData;
import com.alibaba.otter.shared.arbitrate.model.SyncStatusEventData;
import com.alibaba.otter.shared.common.utils.JsonUtils;
import com.alibaba.otter.shared.common.utils.zookeeper.ZkClientx;
/**
* 为setl提供辅助工具的event事件
*
* @author jianghang 2011-10-18 上午10:17:18
* @version 4.0.0
*/
public class ToolArbitrateEvent implements ArbitrateEvent {
private static final Logger logger = LoggerFactory.getLogger(ToolArbitrateEvent.class);
private ZkClientx zookeeper = ZooKeeperClient.getInstance();
/**
* 阻塞等待授权通过
*
* @param pipelineId
* @throws InterruptedException
*/
public void waitForPermit(Long pipelineId) throws InterruptedException {
Assert.notNull(pipelineId);
PermitMonitor permitMonitor = ArbitrateFactory.getInstance(pipelineId, PermitMonitor.class);
permitMonitor.waitForPermit();// 阻塞等待授权
}
/**
* 提供数据接口获取对应pipeline上的状态
*/
public SyncStatusEventData fetch(Long pipelineId) {
String path = StagePathUtils.getPipeline(pipelineId);
try {
byte[] bytes = zookeeper.readData(path);
if (bytes == null || bytes.length == 0) {
SyncStatusEventData evnetData = new SyncStatusEventData();
evnetData.setPipelineId(pipelineId);
return evnetData;
} else {
return JsonUtils.unmarshalFromByte(bytes, SyncStatusEventData.class);
}
} catch (ZkException e) {
// 没有节点返回空
throw new ArbitrateException("fetch_SyncStatus", pipelineId.toString(), e);
}
}
/**
* 提供数据接口更新对应的pipeline上的状态
*/
public void single(SyncStatusEventData syncStatus) {
String path = StagePathUtils.getPipeline(syncStatus.getPipelineId());
try {
byte[] bytes = JsonUtils.marshalToByte(syncStatus);
zookeeper.writeData(path, bytes);
logger.info("## single status : " + syncStatus);
} catch (ZkException e) {
throw new ArbitrateException("single_SyncStatus", syncStatus.getPipelineId().toString(), e);
}
}
/**
* 添加一个index节点
*/
public void addRemedyIndex(RemedyIndexEventData data) {
String path = StagePathUtils.getRemedyRoot(data.getPipelineId());
try {
zookeeper.create(path + "/" + RemedyIndexEventData.formatNodeName(data), new byte[] {},
CreateMode.PERSISTENT);
} catch (ZkNodeExistsException e) {
// ignore
} catch (ZkException e) {
throw new ArbitrateException("addRemedyIndex", data.getPipelineId().toString(), e);
}
}
/**
* 删除一个index节点
*/
public void removeRemedyIndex(RemedyIndexEventData data) {
String path = StagePathUtils.getRemedyRoot(data.getPipelineId());
try {
zookeeper.delete(path + "/" + RemedyIndexEventData.formatNodeName(data));
} catch (ZkNoNodeException e) {
// ignore
} catch (ZkException e) {
throw new ArbitrateException("removeRemedyIndex", data.getPipelineId().toString(), e);
}
}
/**
* 查询当前的remedy index记录
*/
public List<RemedyIndexEventData> listRemedyIndexs(Long pipelineId) {
String path = StagePathUtils.getRemedyRoot(pipelineId);
List<RemedyIndexEventData> datas = new ArrayList<RemedyIndexEventData>();
try {
List<String> nodes = zookeeper.getChildren(path);
for (String node : nodes) {
RemedyIndexEventData data = RemedyIndexEventData.parseNodeName(node);
data.setPipelineId(pipelineId);
datas.add(data);
}
} catch (ZkException e) {
throw new ArbitrateException("listRemedyIndexs", pipelineId.toString(), e);
}
Collections.sort(datas, new RemedyIndexComparator()); // 做一下排序
return datas;
}
/**
* 释放对应的pipeline资源，是个同步调用
*/
public void release(Long pipelineId) {
ArbitrateFactory.destory(pipelineId);
}
public void release() {
ArbitrateFactory.destory();
}
}