/*
* 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.communication;
import java.util.Arrays;
import java.util.List;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.lang.math.RandomUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.alibaba.otter.shared.arbitrate.impl.config.ArbitrateConfigUtils;
import com.alibaba.otter.shared.common.model.config.node.Node;
import com.alibaba.otter.shared.communication.core.CommunicationClient;
import com.alibaba.otter.shared.communication.core.exception.CommunicationException;
import com.alibaba.otter.shared.communication.core.impl.DefaultCommunicationClientImpl;
import com.alibaba.otter.shared.communication.core.model.Callback;
import com.alibaba.otter.shared.communication.core.model.Event;
/**
* 封装了基于communication通讯的工具
*
* @author jianghang 2011-10-18 下午02:18:04
* @version 4.0.0
*/
public class ArbitrateCommmunicationClient {
private static final Logger logger = LoggerFactory.getLogger(ArbitrateCommmunicationClient.class);
private CommunicationClient delegate;
private List<String> managerAddress;
private volatile int index = 0;
/**
* 指定对应的Node节点，进行event调用
*/
public Object call(Long nid, final Event event) {
return delegate.call(convertToAddress(nid), event);
}
/**
* 指定对应的Node节点，进行event调用
*
* <pre>
* 注意：该方法为异步调用
* </pre>
*/
public void call(Long nid, Event event, final Callback callback) {
delegate.call(convertToAddress(nid), event, callback);
}
/**
* 指定manager，进行event调用
*/
public Object callManager(final Event event) {
CommunicationException ex = null;
for (int i = index; i < index + managerAddress.size(); i++) {
String address = managerAddress.get(i % managerAddress.size());
try {
Object result = delegate.call(address, event);
index = i;
return result;
} catch (CommunicationException e) {
ex = e;
logger.warn("call manager [{}] event [{}] failed, maybe can try another manager.", address, event);
}
}
throw ex;
}
/**
* 指定manager，进行event调用
*
* <pre>
* 注意：该方法为异步调用
* </pre>
*/
public void callManager(final Event event, final Callback callback) {
if (delegate instanceof DefaultCommunicationClientImpl) {
DefaultCommunicationClientImpl defaultClient = (DefaultCommunicationClientImpl) delegate;
defaultClient.submit(new Runnable() {
@Override
public void run() {
Object result = callManager(event);
callback.call(result);
}
});
}
}
private String convertToAddress(Long nid) {
Node node = ArbitrateConfigUtils.findNode(nid);
if (node.getParameters().getUseExternalIp()) {
return node.getParameters().getExternalIp() + ":" + node.getPort();
} else {
return node.getIp() + ":" + node.getPort();
}
}
// ================== setter / getter =====================
public void setDelegate(CommunicationClient delegate) {
this.delegate = delegate;
}
public void setManagerAddress(String managerAddress) {
String server = StringUtils.replace(managerAddress, ";", ",");
String[] servers = StringUtils.split(server, ',');
this.managerAddress = Arrays.asList(servers);
this.index = RandomUtils.nextInt(this.managerAddress.size()); // 随机选择一台机器
}
}