com.alibaba.rocketmq.client.consumer.rebalance.AllocateMessageQueueByMachineRoom Maven / Gradle / Ivy
/**
* 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 com.alibaba.rocketmq.client.consumer.rebalance;
import com.alibaba.rocketmq.client.consumer.AllocateMessageQueueStrategy;
import com.alibaba.rocketmq.common.message.MessageQueue;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
/**
* Computer room Hashing queue algorithm, such as Alipay logic room
*/
public class AllocateMessageQueueByMachineRoom implements AllocateMessageQueueStrategy {
private Set consumeridcs;
@Override
public List allocate(String consumerGroup, String currentCID, List mqAll,
List cidAll) {
List result = new ArrayList();
int currentIndex = cidAll.indexOf(currentCID);
if (currentIndex < 0) {
return result;
}
List premqAll = new ArrayList();
for (MessageQueue mq : mqAll) {
String[] temp = mq.getBrokerName().split("@");
if (temp.length == 2 && consumeridcs.contains(temp[0])) {
premqAll.add(mq);
}
}
// Todo cid
int mod = premqAll.size() / cidAll.size();
int rem = premqAll.size() % cidAll.size();
int startindex = mod * currentIndex;
int endindex = startindex + mod;
for (int i = startindex; i < endindex; i++) {
result.add(mqAll.get(i));
}
if (rem > currentIndex) {
result.add(premqAll.get(currentIndex + mod * cidAll.size()));
}
return result;
}
@Override
public String getName() {
return "MACHINE_ROOM";
}
public Set getConsumeridcs() {
return consumeridcs;
}
public void setConsumeridcs(Set consumeridcs) {
this.consumeridcs = consumeridcs;
}
}