rocketmq学习笔记五源码之rocketmq-store_rocketmq服务端修改store

作者：小丑西瓜9 | 2024-05-21 17:08:53

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rocketmq服务端修改store

因为broker东西比较多，所以放到最后。今天来学习下 rocketmq-store

核心流程

问题

1.看看消息如何做的持久化

2.看看如何做的主从同步

config 存储的配置信息


public enum BrokerRole {
    ASYNC_MASTER,
    SYNC_MASTER,
    SLAVE;
}


public enum FlushDiskType {
    SYNC_FLUSH,
    ASYNC_FLUSH
}


/**
 * 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.store.config;
 
import com.alibaba.rocketmq.common.annotation.ImportantField;
import com.alibaba.rocketmq.store.ConsumeQueue;
 
import java.io.File;
 
 
/**
 * @author vongosling
 * @author shijia.wxr
 */
public class MessageStoreConfig {
    //The root directory in which the log data is kept
    @ImportantField
    private String storePathRootDir = System.getProperty("user.home") + File.separator + "store";
 
    //The directory in which the commitlog is kept
    @ImportantField
    private String storePathCommitLog = System.getProperty("user.home") + File.separator + "store"
            + File.separator + "commitlog";
 
    // CommitLog file size,default is 1G
    private int mapedFileSizeCommitLog = 1024 * 1024 * 1024;
    // ConsumeQueue file size, default is 30W
    private int mapedFileSizeConsumeQueue = 300000 * ConsumeQueue.CQStoreUnitSize;
    // CommitLog flush interval
    @ImportantField
    private int flushIntervalCommitLog = 1000;
    // Whether schedule flush,default is real-time
    @ImportantField
    private boolean flushCommitLogTimed = false;
    // ConsumeQueue flush interval
    private int flushIntervalConsumeQueue = 1000;
    // Resource reclaim interval
    private int cleanResourceInterval = 10000;
    // CommitLog removal interval
    private int deleteCommitLogFilesInterval = 100;
    // ConsumeQueue removal interval
    private int deleteConsumeQueueFilesInterval = 100;
    private int destroyMapedFileIntervalForcibly = 1000 * 120;
    private int redeleteHangedFileInterval = 1000 * 120;
    // When to delete,default is at 4 am
    @ImportantField
    private String deleteWhen = "04";
    private int diskMaxUsedSpaceRatio = 75;
    // The number of hours to keep a log file before deleting it (in hours)
    @ImportantField
    private int fileReservedTime = 72;
    // Flow control for ConsumeQueue
    private int putMsgIndexHightWater = 600000;
    // The maximum size of a single log file，default is 512K
    private int maxMessageSize = 1024 * 1024 * 4;
    // Whether check the CRC32 of the records consumed.
    // This ensures no on-the-wire or on-disk corruption to the messages occurred.
    // This check adds some overhead, so it may be disabled in cases seeking extreme performance.
    private boolean checkCRCOnRecover = true;
    // How many pages are to be flushed when flush CommitLog
    private int flushCommitLogLeastPages = 4;
    // Flush page size when the disk in warming state
    private int flushLeastPagesWhenWarmMapedFile = 1024 / 4 * 16;
    // How many pages are to be flushed when flush ConsumeQueue
    private int flushConsumeQueueLeastPages = 2;
    private int flushCommitLogThoroughInterval = 1000 * 10;
    private int flushConsumeQueueThoroughInterval = 1000 * 60;
    @ImportantField
    private int maxTransferBytesOnMessageInMemory = 1024 * 256;
    @ImportantField
    private int maxTransferCountOnMessageInMemory = 32;
    @ImportantField
    private int maxTransferBytesOnMessageInDisk = 1024 * 64;
    @ImportantField
    private int maxTransferCountOnMessageInDisk = 8;
    @ImportantField
    private int accessMessageInMemoryMaxRatio = 40;
    @ImportantField
    private boolean messageIndexEnable = true;
    private int maxHashSlotNum = 5000000;
    private int maxIndexNum = 5000000 * 4;
    private int maxMsgsNumBatch = 64;
    @ImportantField
    private boolean messageIndexSafe = false;
    private int haListenPort = 10912;
    private int haSendHeartbeatInterval = 1000 * 5;
    private int haHousekeepingInterval = 1000 * 20;
    private int haTransferBatchSize = 1024 * 32;
    @ImportantField
    private String haMasterAddress = null;
    private int haSlaveFallbehindMax = 1024 * 1024 * 256;
    @ImportantField
    private BrokerRole brokerRole = BrokerRole.ASYNC_MASTER;
    @ImportantField
    private FlushDiskType flushDiskType = FlushDiskType.ASYNC_FLUSH;
    private int syncFlushTimeout = 1000 * 5;
    private String messageDelayLevel = "1s 5s 10s 30s 1m 2m 3m 4m 5m 6m 7m 8m 9m 10m 20m 30m 1h 2h";
    private long flushDelayOffsetInterval = 1000 * 10;
    @ImportantField
    private boolean cleanFileForciblyEnable = true;
    private boolean warmMapedFileEnable = false;
    private boolean offsetCheckInSlave = false;
    private boolean debugLockEnable = false;
    private boolean duplicationEnable = false;
    private boolean diskFallRecorded = true;
    private long osPageCacheBusyTimeOutMills = 1000;
    private int defaultQueryMaxNum = 32;

DefaultMessageStore

看下其启动任务，包含了哪些东西


    public void start() throws Exception {
        this.flushConsumeQueueService.start();
        this.commitLog.start();
        this.storeStatsService.start();
 
 
        if (this.scheduleMessageService != null && SLAVE != messageStoreConfig.getBrokerRole()) {
            this.scheduleMessageService.start();
        }
 
        if (this.getMessageStoreConfig().isDuplicationEnable()) {
            this.reputMessageService.setReputFromOffset(this.commitLog.getConfirmOffset());
        } else {
            this.reputMessageService.setReputFromOffset(this.commitLog.getMaxOffset());
        }
        this.reputMessageService.start();
 
        this.haService.start();
 
        this.createTempFile();
        this.addScheduleTask();
        this.shutdown = false;
    }

FlushConsumeQueueService


private void doFlush(int retryTimes) {
            int flushConsumeQueueLeastPages = DefaultMessageStore.this.getMessageStoreConfig().getFlushConsumeQueueLeastPages();
 
            if (retryTimes == RetryTimesOver) {
                flushConsumeQueueLeastPages = 0;
            }
 
            long logicsMsgTimestamp = 0;
 
 
            int flushConsumeQueueThoroughInterval = DefaultMessageStore.this.getMessageStoreConfig().getFlushConsumeQueueThoroughInterval();
            long currentTimeMillis = System.currentTimeMillis();
            if (currentTimeMillis >= (this.lastFlushTimestamp + flushConsumeQueueThoroughInterval)) {
                this.lastFlushTimestamp = currentTimeMillis;
                flushConsumeQueueLeastPages = 0;
                logicsMsgTimestamp = DefaultMessageStore.this.getStoreCheckpoint().getLogicsMsgTimestamp();
            }
 
            ConcurrentHashMap<String, ConcurrentHashMap<Integer, ConsumeQueue>> tables = DefaultMessageStore.this.consumeQueueTable;
 
            for (ConcurrentHashMap<Integer, ConsumeQueue> maps : tables.values()) {
                for (ConsumeQueue cq : maps.values()) {
                    boolean result = false;
                    for (int i = 0; i < retryTimes && !result; i++) {
                        result = cq.commit(flushConsumeQueueLeastPages);
                    }
                }
            }
 
            if (0 == flushConsumeQueueLeastPages) {
                if (logicsMsgTimestamp > 0) {
                    DefaultMessageStore.this.getStoreCheckpoint().setLogicsMsgTimestamp(logicsMsgTimestamp);
                }
                DefaultMessageStore.this.getStoreCheckpoint().flush();
            }
        }

CommitLog

StoreStatsService

统计输出message store的TPS


 public void run() {
        log.info(this.getServiceName() + " service started");
 
        while (!this.isStoped()) {
            try {
                this.waitForRunning(FrequencyOfSampling);
 
                this.sampling();
 
                this.printTps();
            } catch (Exception e) {
                log.warn(this.getServiceName() + " service has exception. ", e);
            }
        }
 
        log.info(this.getServiceName() + " service end");
    }

ScheduleMessageService


public void start() {
 
        for (Map.Entry<Integer, Long> entry : this.delayLevelTable.entrySet()) {
            Integer level = entry.getKey();
            Long timeDelay = entry.getValue();
            Long offset = this.offsetTable.get(level);
            if (null == offset) {
                offset = 0L;
            }
 
            if (timeDelay != null) {
                this.timer.schedule(new DeliverDelayedMessageTimerTask(level, offset), FIRST_DELAY_TIME);
            }
        }
 
        this.timer.scheduleAtFixedRate(new TimerTask() {
 
            @Override
            public void run() {
                try {
                    ScheduleMessageService.this.persist();
                } catch (Exception e) {
                    log.error("scheduleAtFixedRate flush exception", e);
                }
            }
        }, 10000, this.defaultMessageStore.getMessageStoreConfig().getFlushDelayOffsetInterval());
    }

ReputMessageService


 private void doReput() {
            for (boolean doNext = true; this.isCommitLogAvailable() && doNext; ) {
 
                if (DefaultMessageStore.this.getMessageStoreConfig().isDuplicationEnable() //
                        && this.reputFromOffset >= DefaultMessageStore.this.getConfirmOffset()) {
                    break;
                }
 
                SelectMapedBufferResult result = DefaultMessageStore.this.commitLog.getData(reputFromOffset);
                if (result != null) {
                    try {
                        this.reputFromOffset = result.getStartOffset();
 
                        for (int readSize = 0; readSize < result.getSize() && doNext; ) {
                            DispatchRequest dispatchRequest =
                                    DefaultMessageStore.this.commitLog.checkMessageAndReturnSize(result.getByteBuffer(), false, false);
                            int size = dispatchRequest.getMsgSize();
 
                            if (dispatchRequest.isSuccess()) {
                                if (size > 0) {
                                    DefaultMessageStore.this.doDispatch(dispatchRequest);
 
                                    if (BrokerRole.SLAVE != DefaultMessageStore.this.getMessageStoreConfig().getBrokerRole()
                                            && DefaultMessageStore.this.brokerConfig.isLongPollingEnable()) {
                                        DefaultMessageStore.this.messageArrivingListener.arriving(dispatchRequest.getTopic(),
                                                dispatchRequest.getQueueId(), dispatchRequest.getConsumeQueueOffset() + 1,
                                                dispatchRequest.getTagsCode());
                                    }
                                    // FIXED BUG By shijia
                                    this.reputFromOffset += size;
                                    readSize += size;
                                    if (DefaultMessageStore.this.getMessageStoreConfig().getBrokerRole() == BrokerRole.SLAVE) {
                                        DefaultMessageStore.this.storeStatsService
                                                .getSinglePutMessageTopicTimesTotal(dispatchRequest.getTopic()).incrementAndGet();
                                        DefaultMessageStore.this.storeStatsService
                                                .getSinglePutMessageTopicSizeTotal(dispatchRequest.getTopic())
                                                .addAndGet(dispatchRequest.getMsgSize());
                                    }
                                }
 
                                else if (size == 0) {
                                    this.reputFromOffset = DefaultMessageStore.this.commitLog.rollNextFile(this.reputFromOffset);
                                    readSize = result.getSize();
                                }
                            } else if (!dispatchRequest.isSuccess()) {
 
 
                                if (size > 0) {
                                    log.error("[BUG]read total count not equals msg total size. reputFromOffset={}", reputFromOffset);
                                    this.reputFromOffset += size;
                                }
                                else {
                                    doNext = false;
                                    if (DefaultMessageStore.this.brokerConfig.getBrokerId() == MixAll.MASTER_ID) {
                                        log.error("[BUG]the master dispatch message to consume queue error, COMMITLOG OFFSET: {}",
                                                this.reputFromOffset);
 
                                        this.reputFromOffset += (result.getSize() - readSize);
                                    }
                                }
                            }
                        }
                    } finally {
                        result.release();
                    }
                } else {
                    doNext = false;
                }
            }
        }

HAService


public void start() {
        this.acceptSocketService.beginAccept();
        this.acceptSocketService.start();
        this.groupTransferService.start();
        this.haClient.start();
    }

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rocketmq学习笔记 五 源码之rocketmq-store_rocketmq服务端修改store