DongyuanPan commented on code in PR #131: URL: https://github.com/apache/rocketmq-mqtt/pull/131#discussion_r954452956
########## mqtt-ds/src/main/java/org/apache/rocketmq/mqtt/ds/retain/RetainedMsgClient.java: ########## @@ -0,0 +1,210 @@ +/* + * 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 org.apache.rocketmq.mqtt.ds.retain; + +import com.alibaba.fastjson.JSON; +import com.alibaba.fastjson.serializer.SerializerFeature; +import com.alipay.sofa.jraft.RouteTable; +import com.alipay.sofa.jraft.conf.Configuration; +import com.alipay.sofa.jraft.entity.PeerId; +import com.alipay.sofa.jraft.error.RemotingException; +import com.alipay.sofa.jraft.option.CliOptions; +import com.alipay.sofa.jraft.rpc.InvokeCallback; +import com.alipay.sofa.jraft.rpc.impl.GrpcRaftRpcFactory; +import com.alipay.sofa.jraft.rpc.impl.MarshallerRegistry; +import com.alipay.sofa.jraft.rpc.impl.cli.CliClientServiceImpl; +import com.alipay.sofa.jraft.util.RpcFactoryHelper; +import com.google.protobuf.ByteString; +import org.apache.rocketmq.mqtt.common.model.Message; +import org.apache.rocketmq.mqtt.common.model.consistency.ReadRequest; +import org.apache.rocketmq.mqtt.common.model.consistency.Response; +import org.apache.rocketmq.mqtt.common.model.consistency.WriteRequest; +import org.apache.rocketmq.mqtt.ds.config.ServiceConf; +import org.apache.rocketmq.mqtt.meta.raft.processor.Constants; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; +import org.springframework.stereotype.Service; + +import javax.annotation.PostConstruct; +import javax.annotation.Resource; +import java.util.ArrayList; +import java.util.HashMap; +import java.util.List; +import java.util.concurrent.CompletableFuture; +import java.util.concurrent.Executor; +import java.util.concurrent.TimeoutException; + + +@Service +public class RetainedMsgClient { + + private static Logger logger = LoggerFactory.getLogger(RetainedMsgClient.class); + private static final String GROUP_SEQ_NUM_SPLIT = "-"; + final String groupId = Constants.RETAINEDMSG + GROUP_SEQ_NUM_SPLIT + 0; + final Configuration conf = new Configuration(); + static final CliClientServiceImpl CLICLIENTSERVICE = new CliClientServiceImpl(); + + static final String GROUPNAME = "retainedMsg"; + static PeerId leader; + + @Resource + private ServiceConf serviceConf; + + @PostConstruct + public void init() throws InterruptedException, TimeoutException { + initRpcServer(); + if (!conf.parse(serviceConf.getMetaAddr())) { //from service.conf + throw new IllegalArgumentException("Fail to parse conf:" + serviceConf.getMetaAddr()); + } + RouteTable.getInstance().updateConfiguration(groupId, conf); + + CLICLIENTSERVICE.init(new CliOptions()); + + if (!RouteTable.getInstance().refreshLeader(CLICLIENTSERVICE, groupId, 3000).isOk()) { + throw new IllegalStateException("Refresh leader failed"); + } + + leader = RouteTable.getInstance().selectLeader(groupId); + logger.info("--------------------- Leader is " + leader + " ---------------------------"); + } + + public static void initRpcServer() { + GrpcRaftRpcFactory raftRpcFactory = (GrpcRaftRpcFactory) RpcFactoryHelper.rpcFactory(); + raftRpcFactory.registerProtobufSerializer(WriteRequest.class.getName(), WriteRequest.getDefaultInstance()); + raftRpcFactory.registerProtobufSerializer(ReadRequest.class.getName(), ReadRequest.getDefaultInstance()); + raftRpcFactory.registerProtobufSerializer(Response.class.getName(), Response.getDefaultInstance()); + + MarshallerRegistry registry = raftRpcFactory.getMarshallerRegistry(); + registry.registerResponseInstance(WriteRequest.class.getName(), Response.getDefaultInstance()); + registry.registerResponseInstance(ReadRequest.class.getName(), Response.getDefaultInstance()); + } + + public static void SetRetainedMsg(String topic, Message msg, CompletableFuture<Boolean> future) throws RemotingException, InterruptedException { + + HashMap<String, String> option = new HashMap<>(); + option.put("topic", topic); + option.put("firstTopic", msg.getFirstTopic()); + option.put("isEmpty", String.valueOf(msg.isEmpty())); + + logger.debug("SetRetainedMsg option:" + option); + + final WriteRequest request = WriteRequest.newBuilder().setGroup(GROUPNAME + GROUP_SEQ_NUM_SPLIT + "0").setData(ByteString.copyFrom(JSON.toJSONBytes(msg, SerializerFeature.WriteClassName))).putAllExtData(option).build(); + + CLICLIENTSERVICE.getRpcClient().invokeAsync(leader.getEndpoint(), request, new InvokeCallback() { + @Override + public void complete(Object result, Throwable err) { + if (err == null) { + Response rsp = (Response) result; + if (!rsp.getSuccess()) { + logger.info("SetRetainedMsg failed. {}", rsp.getErrMsg()); + return; + } + logger.info("-------------------------------SetRetainedMsg success.----------------------------------"); + future.complete(true); + } else { + logger.debug("-------------------------------SetRetainedMsg fail.-------------------------------------"); + logger.error("", err); + future.complete(false); + } + } + + @Override + public Executor executor() { + return null; + } + }, 5000); + + } + + public static void GetRetainedMsgsFromTrie(String firstTopic, String topic, CompletableFuture<ArrayList<Message>> future) throws RemotingException, InterruptedException { + HashMap<String, String> option = new HashMap<>(); + + option.put("firstTopic", firstTopic); + option.put("topic", topic); + + logger.debug("GetRetainedMsgsFromTrie option:" + option); + + final ReadRequest request = ReadRequest.newBuilder().setGroup(GROUPNAME + GROUP_SEQ_NUM_SPLIT + "0").setOperation("trie").setType(Constants.READ_INDEX_TYPE).putAllExtData(option).build(); + + CLICLIENTSERVICE.getRpcClient().invokeAsync(leader.getEndpoint(), request, new InvokeCallback() { + @Override + public void complete(Object result, Throwable err) { + if (err == null) { + Response rsp = (Response) result; + if (!rsp.getSuccess()) { + logger.info("GetRetainedTopicTrie failed. {}", rsp.getErrMsg()); + return; + } + List<ByteString> datalistList = rsp.getDatalistList(); + ArrayList<Message> resultList = new ArrayList<>(); + for (ByteString tmp : datalistList) { + resultList.add(JSON.parseObject(tmp.toStringUtf8(), Message.class)); + } + future.complete(resultList); + logger.debug("-------------------------------GetRetainedTopicTrie success.----------------------------------"); + } else { + logger.debug("-------------------------------GetRetainedTopicTrie fail.-------------------------------------"); + logger.error("", err); + future.complete(null); + } + } + + @Override + public Executor executor() { + return null; + } + }, 5000); + } + + + public static void GetRetainedMsg(String topic, CompletableFuture<Message> future) throws RemotingException, InterruptedException { + + HashMap<String, String> option = new HashMap<>(); + option.put("topic", topic); + + final ReadRequest request = ReadRequest.newBuilder().setGroup(GROUPNAME + GROUP_SEQ_NUM_SPLIT + "0").setOperation("topic").setType(Constants.READ_INDEX_TYPE).putAllExtData(option).build(); + + CLICLIENTSERVICE.getRpcClient().invokeAsync(leader.getEndpoint(), request, new InvokeCallback() { + + @Override + public void complete(Object result, Throwable err) { + if (err == null) { + Response rsp = (Response) result; + if (!rsp.getSuccess()) { + logger.info("GetRetainedMsg failed. {}", rsp.getErrMsg()); + return; + } + if (rsp.getData().toStringUtf8().equals("null")) { //this topic doesn't exist retained msg + return; + } + String strMsg = rsp.getData().toStringUtf8(); + Message message = JSON.parseObject(strMsg, Message.class); Review Comment: Is there a better way for Convert Java object to protobuf or parseObject from protobuf？ -- This is an automated message from the Apache Git Service. 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