/*
* 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.delegate;
import java.util.List;
import com.alibaba.otter.shared.arbitrate.impl.ArbitrateEvent;
import com.alibaba.otter.shared.arbitrate.impl.config.ArbitrateConfigUtils;
import com.alibaba.otter.shared.common.model.config.node.Node;
import com.alibaba.otter.shared.common.model.config.pipeline.Pipeline;
import com.alibaba.otter.shared.common.model.config.pipeline.PipelineParameter.ArbitrateMode;
/**
* delegate一些共用的判断摸索
*
* @author jianghang 2012-9-28 上午10:07:16
* @version 4.1.0
*/
public class AbstractDelegateArbitrateEvent implements ArbitrateEvent {
public ArbitrateMode chooseMode(Long pipelineId) {
Pipeline pipeline = ArbitrateConfigUtils.getPipeline(pipelineId);
ArbitrateMode arbitrateMode = pipeline.getParameters().getArbitrateMode();
// 重新计算arbitrateMode
ArbitrateMode result = null;
switch (arbitrateMode) {
case AUTOMATIC:
// 1. 如果s/e/t/l都是由1台或者多台机器提供服务，则选择内存模式
// 2. 如果s/e由一组机器，t/l由另一组机器提供服务，则选择rpc模式
if (containAll(pipeline.getSelectNodes(), pipeline.getExtractNodes())
&& containAll(pipeline.getSelectNodes(), pipeline.getLoadNodes())) {
result = ArbitrateMode.MEMORY;
} else {
result = ArbitrateMode.RPC;
}
break;
default:
result = arbitrateMode;
break;
}
return result;
}
/**
* 判断srcNodes是否在targetNodes中都包含
*/
private boolean containAll(List<Node> srcNodes, List<Node> targetNodes) {
boolean result = true;
for (Node node : srcNodes) {
result &= targetNodes.contains(node);
}
return result;
}
}