CommitLog : MappedFileQueue : MappedFile = 1 : 1 : N。
CommitLog : MappedFileQueue : MappedFile = 1 : 1 : N。
MESSAGE[1]MESSAGE[2]…MESSAGE[n - 1]MESSAGE[n]BLANK
CommitLog#putMessage(…) 1: public PutMessageResult putMessage(final MessageExtBrokerInner msg) { 2: // Set the storage time 3: msg.setStoreTimestamp(System.currentTimeMillis()); 4: // Set the message body BODY CRC (consider the most appropriate setting 5: // on the client) 6: msg.setBodyCRC(UtilAll.crc32(msg.getBody())); 7: // Back to Results 8: AppendMessageResult result = null; 9: 10: StoreStatsService storeStatsService = this.defaultMessageStore.getStoreStatsService(); 11: 12: String topic = msg.getTopic(); 13: int queueId = msg.getQueueId(); 14: 15: // 事务相关 TODO 待读：事务相关 16: final int tranType = MessageSysFlag.getTransactionValue(msg.getSysFlag()); 17: if (tranType == MessageSysFlag.TRANSACTION_NOT_TYPE// 18: || tranType == MessageSysFlag.TRANSACTION_COMMIT_TYPE) { 19: // Delay Delivery 20: if (msg.getDelayTimeLevel() > 0) { 21: if (msg.getDelayTimeLevel() > this.defaultMessageStore.getScheduleMessageService().getMaxDelayLevel()) { 22: msg.setDelayTimeLevel(this.defaultMessageStore.getScheduleMessageService().getMaxDelayLevel()); 23: } 24: 25: topic = ScheduleMessageService.SCHEDULE_TOPIC; 26: queueId = ScheduleMessageService.delayLevel2QueueId(msg.getDelayTimeLevel()); 27: 28: // Backup real topic, queueId 29: MessageAccessor.putProperty(msg, MessageConst.PROPERTY_REAL_TOPIC, msg.getTopic()); 30: MessageAccessor.putProperty(msg, MessageConst.PROPERTY_REAL_QUEUE_ID, String.valueOf(msg.getQueueId())); 31: msg.setPropertiesString(MessageDecoder.messageProperties2String(msg.getProperties())); 32: 33: msg.setTopic(topic); 34: msg.setQueueId(queueId); 35: } 36: } 37: 38: long eclipseTimeInLock = 0; 39: 40: // 获取写入映射文件 41: MappedFile unlockMappedFile = null; 42: MappedFile mappedFile = this.mappedFileQueue.getLastMappedFile(); 43: 44: // 获取写入锁 45: lockForPutMessage(); //spin... 46: try { 47: long beginLockTimestamp = this.defaultMessageStore.getSystemClock().now(); 48: this.beginTimeInLock = beginLockTimestamp; 49: 50: // Here settings are stored timestamp, in order to ensure an orderly 51: // global 52: msg.setStoreTimestamp(beginLockTimestamp); 53: 54: // 当不存在映射文件时，进行创建 55: if (null == mappedFile || mappedFile.isFull()) { 56: mappedFile = this.mappedFileQueue.getLastMappedFile(0); // Mark: NewFile may be cause noise 57: } 58: if (null == mappedFile) { 59: log.error("create maped file1 error, topic: " + msg.getTopic() + " clientAddr: " + msg.getBornHostString()); 60: beginTimeInLock = 0; 61: return new PutMessageResult(PutMessageStatus.CREATE_MAPEDFILE_FAILED, null); 62: } 63: 64: // 存储消息 65: result = mappedFile.appendMessage(msg, this.appendMessageCallback); 66: switch (result.getStatus()) { 67: case PUT_OK: 68: break; 69: case END_OF_FILE: // 当文件尾时，获取新的映射文件，并进行插入 70: unlockMappedFile = mappedFile; 71: // Create a new file, re-write the message 72: mappedFile = this.mappedFileQueue.getLastMappedFile(0); 73: if (null == mappedFile) { 74: // XXX: warn and notify me 75: log.error("create maped file2 error, topic: " + msg.getTopic() + " clientAddr: " + msg.getBornHostString()); 76: beginTimeInLock = 0; 77: return new PutMessageResult(PutMessageStatus.CREATE_MAPEDFILE_FAILED, result); 78: } 79: result = mappedFile.appendMessage(msg, this.appendMessageCallback); 80: break; 81: case MESSAGE_SIZE_EXCEEDED: 82: case PROPERTIES_SIZE_EXCEEDED: 83: beginTimeInLock = 0; 84: return new PutMessageResult(PutMessageStatus.MESSAGE_ILLEGAL, result); 85: case UNKNOWN_ERROR: 86: beginTimeInLock = 0; 87: return new PutMessageResult(PutMessageStatus.UNKNOWN_ERROR, result); 88: default: 89: beginTimeInLock = 0; 90: return new PutMessageResult(PutMessageStatus.UNKNOWN_ERROR, result); 91: } 92: 93: eclipseTimeInLock = this.defaultMessageStore.getSystemClock().now() - beginLockTimestamp; 94: beginTimeInLock = 0; 95: } finally { 96: // 释放写入锁 97: releasePutMessageLock(); 98: } 99: 100: if (eclipseTimeInLock > 500) {101: log.warn("[NOTIFYME]putMessage in lock cost time(ms)={}, bodyLength={} AppendMessageResult={}", eclipseTimeInLock, msg.getBody().length, result);102: }103: 104: // 105: if (null != unlockMappedFile && this.defaultMessageStore.getMessageStoreConfig().isWarmMapedFileEnable()) {106: this.defaultMessageStore.unlockMappedFile(unlockMappedFile);107: }108: 109: PutMessageResult putMessageResult = new PutMessageResult(PutMessageStatus.PUT_OK, result);110: 111: // Statistics112: storeStatsService.getSinglePutMessageTopicTimesTotal(msg.getTopic()).incrementAndGet();113: storeStatsService.getSinglePutMessageTopicSizeTotal(topic).addAndGet(result.getWroteBytes());114: 115: // 进行同步||异步 flush||commit116: GroupCommitRequest request = null;117: // Synchronization flush118: if (FlushDiskType.SYNC_FLUSH == this.defaultMessageStore.getMessageStoreConfig().getFlushDiskType()) {119: final GroupCommitService service = (GroupCommitService) this.flushCommitLogService;120: if (msg.isWaitStoreMsgOK()) {121: request = new GroupCommitRequest(result.getWroteOffset() + result.getWroteBytes());122: service.putRequest(request);123: boolean flushOK = request.waitForFlush(this.defaultMessageStore.getMessageStoreConfig().getSyncFlushTimeout());124: if (!flushOK) {125: log.error("do groupcommit, wait for flush failed, topic: " + msg.getTopic() + " tags: " + msg.getTags()126: + " client address: " + msg.getBornHostString());127: putMessageResult.setPutMessageStatus(PutMessageStatus.FLUSH_DISK_TIMEOUT);128: }129: } else {130: service.wakeup();131: }132: }133: // Asynchronous flush134: else {135: if (!this.defaultMessageStore.getMessageStoreConfig().isTransientStorePoolEnable()) {136: flushCommitLogService.wakeup(); // important：唤醒commitLog线程，进行flush137: } else {138: commitLogService.wakeup();139: }140: }141: 142: // Synchronous write double 如果是同步Master，同步到从节点 // TODO 待读：数据同步143: if (BrokerRole.SYNC_MASTER == this.defaultMessageStore.getMessageStoreConfig().getBrokerRole()) {144: HAService service = this.defaultMessageStore.getHaService();145: if (msg.isWaitStoreMsgOK()) {146: // Determine whether to wait147: if (service.isSlaveOK(result.getWroteOffset() + result.getWroteBytes())) {148: if (null == request) {149: request = new GroupCommitRequest(result.getWroteOffset() + result.getWroteBytes());150: }151: service.putRequest(request);152: 153: service.getWaitNotifyObject().wakeupAll();154: 155: boolean flushOK =156: // TODO157: request.waitForFlush(this.defaultMessageStore.getMessageStoreConfig().getSyncFlushTimeout());158: if (!flushOK) {159: log.error("do sync transfer other node, wait return, but failed, topic: " + msg.getTopic() + " tags: "160: + msg.getTags() + " client address: " + msg.getBornHostString());161: putMessageResult.setPutMessageStatus(PutMessageStatus.FLUSH_SLAVE_TIMEOUT);162: }163: }164: // Slave problem165: else {166: // Tell the producer, slave not available167: putMessageResult.setPutMessageStatus(PutMessageStatus.SLAVE_NOT_AVAILABLE);168: }169: }170: }171: 172: return putMessageResult;173: }
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