{"id":3012,"date":"2021-08-01T22:21:07","date_gmt":"2021-08-01T14:21:07","guid":{"rendered":"\/?p=3012"},"modified":"2021-08-01T22:21:07","modified_gmt":"2021-08-01T14:21:07","slug":"8-2-%e8%af%bb%e5%86%99%e5%88%86%e7%a6%bb","status":"publish","type":"post","link":"http:\/\/xinblog.ltd\/?p=3012","title":{"rendered":"8.2 \u8bfb\u5199\u5206\u79bb"},"content":{"rendered":"

\u4ece\u670d\u52a1\u5668\u5982\u4f55\u5728\u6d88\u606f\u62c9\u53d6\u7684\u65f6\u5019\u53c2\u4e0e\u8d1f\u8f7d,\u8fd9\u5c31\u662f\u4e00\u4e2a\u4e3b\u8981\u7684\u95ee\u9898,\u800c\u5bf9\u4e8e\u6d88\u606f\u7684\u62c9\u53d6,\u5219\u662f\u57fa\u4e8e\u7684MessageQueue\u8fd9\u4e2a\u6570\u636e\u7ed3\u6784,MessageQueue\u7684\u6570\u636e\u7c7b\u56fe\u5982\u4e0b<\/p>\n\n\n\n
\n MessageQueue<\/td>\n<\/tr>\n
\n private String topic<\/p>\n

private String brokerName<\/p>\n

private int queueId<\/td>\n<\/tr>\n<\/table>\n

\u5bf9\u4e8e\u8bfb\u5199\u5206\u79bb\u7684\u6838\u5fc3\u6d41\u7a0b,\u5728\u4e8e\u6839\u636ebroker\u67e5\u627e\u5230\u5b9e\u9645\u7684brokerAddr\u7684\u51fd\u6570\u4e2d<\/p>\n

RMQ\u6839\u636eMessageQueue\u67e5\u627eBroker\u5730\u5740\u7684\u552f\u4e00\u4f9d\u636e\u662fbrokerName<\/p>\n

MQ\u7684brokerName\u4e00\u81f4,\u4f46\u662fbrokerId\u4e0d\u540c,\u4e3b\u670d\u52a1\u5668brokerId\u4e3a0,\u4ecebrokerId\u5927\u4e8e0,RMQ\u63d0\u4f9b\u5bf9\u5e94\u7684\u51fd\u6570\u6765\u6839\u636ebrokerName\u627e\u5230\u5bf9\u5e94\u7684brokerAddr<\/p>\n

\u4e00\u4e2abrokerName\u5bf9\u5e94\u7740\u4e00\u7ec4broker,\u4ed6\u4eec\u7684brokerId\u4e0d\u540c,\u4e3bbroker\u7684id\u4e3a0,\u4ecebrokerId\u4e0d\u76f8\u540c<\/p>\n

\u4e0a\u9762\u5c31\u662f\u6839\u636ebrokerName\u5bf9\u5e94\u627e\u5230brokerId \u4ece\u800c\u83b7\u53d6brokerAddr\u7684\u5168\u8fc7\u7a0b<\/p>\n

\u4ee3\u7801\u5982\u4e0b<\/p>\n\n\n
\n FindBrokerResult findBrokerResult =<\/p>\n

this.mQClientFactory.findBrokerAddressInSubscribe(mq.getBrokerName(),<\/p>\n

this.recalculatePullFromWhichNode(mq), false);<\/td>\n<\/tr>\n<\/table>\n

\u5176\u4e2d\u6211\u4eec\u83b7\u53d6\u5230<\/p>\n

findBrokerAddressInSubscribe<\/p>\n

\u51fd\u6570\u4e2d,\u4f20\u5165\u7684\u53c2\u6570\u663e\u800c\u6613\u89c1<\/p>\n

brokerName,brokerId,onlyThisBroker->\u9650\u5b9a\u662f\u5426\u8fd4\u56de\u6b64broker\u5bf9\u5e94\u7684\u670d\u52a1\u5668\u4fe1\u606f<\/p>\n\n\n
\n public FindBrokerResult findBrokerAddressInSubscribe(<\/p>\n

final String brokerName,<\/p>\n

final long brokerId,<\/p>\n

final boolean onlyThisBroker<\/p>\n

) {<\/p>\n

String brokerAddr = null;<\/p>\n

boolean slave = false;<\/p>\n

boolean found = false;<\/p>\n

HashMap<Long\/* brokerId *\/, String\/* address *\/> map = this.brokerAddrTable.get(brokerName);<\/p>\n

\/\/\u6839\u636e\u8282\u70b9\u6c11\u79f0\u83b7\u53d6\u5230\u6240\u6709\u7684\u8282\u70b9Id<\/p>\n

if (map != null && !map.isEmpty()) {<\/p>\n

\/\/\u5c1d\u8bd5\u83b7\u53d6\u5230Id\u5bf9\u5e94\u7684Addr<\/p>\n

brokerAddr = map.get(brokerId);<\/p>\n

slave = brokerId != MixAll.MASTER_ID<\/em>;<\/p>\n

found = brokerAddr != null;<\/p>\n

\/\/\u5982\u679c\u6ca1\u627e\u5230\u5e76\u4e14\u662fId\u662f\u4ece\u8282\u70b9<\/p>\n

if (!found && slave) {<\/p>\n

\/\/\u4ece\u65b0\u83b7\u53d6<\/p>\n

brokerAddr = map.get(brokerId + 1);<\/p>\n

found = brokerAddr != null;<\/p>\n

}<\/p>\n

if (!found && !onlyThisBroker) {<\/p>\n

\/\/\u83b7\u53d6\u4e0b\u4e00\u4e2abrokerName\u4e2d\u7684addr<\/p>\n

Entry<Long, String> entry = map.entrySet().iterator().next();<\/p>\n

brokerAddr = entry.getValue();<\/p>\n

slave = entry.getKey() != MixAll.MASTER_ID<\/em>;<\/p>\n

found = true;<\/p>\n

}<\/p>\n

}<\/p>\n

\/\/\u8fd4\u56de\u6570\u636e\u7ed3\u6784,\u5305\u542bBroker\u5730\u5740,\u662f\u5426\u662f\u4ece\u8282\u70b9 Broker\u7248\u672c<\/p>\n

if (found) {<\/p>\n

return new FindBrokerResult(brokerAddr, slave, findBrokerVersion(brokerName, brokerAddr));<\/p>\n

}<\/p>\n

return null;<\/p>\n

}<\/td>\n<\/tr>\n<\/table>\n

\u6700\u7ec8\u6839\u636e\u662f\u5426\u77e5\u9053\u4e86\u5730\u5740,\u6765\u7ec4\u6210\u8fd4\u56de\u6570\u636e\u7ed3\u6784,\u5176\u4e2d\u5305\u542b\u5730\u5740,\u540d\u79f0\u7b49\u5c5e\u6027<\/p>\n

\u5728\u4f20\u5165\u53c2\u6570\u7684\u65f6\u5019,\u5c1d\u8bd5\u6839\u636ebrokerName\u83b7\u53d6\u5230brokerId\u7684\u51fd\u6570\u4e3a<\/p>\n

recalculatePullFromWhichNode(),\u5176\u51fd\u6570\u5b9e\u73b0\u4e3a<\/p>\n\n\n
\n public long recalculatePullFromWhichNode(final MessageQueue mq) {<\/p>\n

\/\/\u9ed8\u8ba4\u8fd4\u56de\u4e3b\u8282\u70b9<\/p>\n

if (this.isConnectBrokerByUser()) {<\/p>\n

return this.defaultBrokerId;<\/p>\n

}<\/p>\n

\/\/\u4ece\u6b64\u7f13\u5b58\u8868\u83b7\u53d6<\/p>\n

AtomicLong suggest = this.pullFromWhichNodeTable.get(mq);<\/p>\n

if (suggest != null) {<\/p>\n

return suggest.get();<\/p>\n

}<\/p>\n

return MixAll.MASTER_ID<\/em>;<\/p>\n

}<\/td>\n<\/tr>\n<\/table>\n

\u5bf9\u4e8e\u6b64\u7f13\u5b58\u8868\u4e2d\u7684\u6570\u636e,\u4ece\u4f55\u800c\u6765\u5462?<\/p>\n

\u8fd9\u4e00\u7f13\u5b58\u8868\u7684\u6570\u636e\u6765\u6e90\u81eaPullMessageService\u5728\u4ece\u4e3b\u670d\u52a1\u5668\u62c9\u53d6\u6d88\u606f\u4e4b\u540e,\u4f1a\u8ba1\u7b97\u5efa\u8bae\u4e0b\u4e00\u6b21\u62c9\u53d6\u7684brokerId,\u4ece\u800c\u66f4\u65b0\u8fd9\u4e2aPullMessageService<\/p>\n\n\n
\n public PullResult processPullResult(final MessageQueue mq, final PullResult pullResult,<\/p>\n

final SubscriptionData subscriptionData) {<\/p>\n

PullResultExt pullResultExt = (PullResultExt) pullResult;<\/p>\n

this.updatePullFromWhichNode(mq, pullResultExt.getSuggestWhichBrokerId());<\/td>\n<\/tr>\n<\/table>\n

\u4e0a\u9762\u5c31\u662f\u6839\u636e\u5efa\u8bae\u7684brokerId\u66f4\u65b0\u7f13\u5b58\u8868<\/p>\n

\u800c\u66f4\u65b0\u7684\u89c4\u5219\u5219\u5728Broker\u4e0a<\/p>\n

\u5728\u4e3bBroker\u4e0a\u8fd4\u56de\u5efa\u8baeBrokerId\u7684\u5730\u65b9\u4e3a<\/p>\n\n\n
\n \/\/normal\u6d41\u7a0b\u4e2d<\/p>\n

\/\/\u6700\u5927\u504f\u79fb\u91cf\u51cf\u53bb\u6b64\u6b21\u62c9\u53d6\u7684\u6700\u5927\u504f\u79fb\u91cf<\/p>\n

long diff = maxOffsetPy – maxPhyOffsetPulling;<\/p>\n

\/\/\u83b7\u53d6\u672c\u673a\u6700\u5927\u5185\u5b58\u4e58\u4ee5\u80fd\u4f7f\u7528\u7684\u6700\u5927\u6bd4\u4f8b,\u4ece\u800c\u83b7\u53d6\u5230\u4e00\u4e2a\u53ef\u4ee5\u4f7f\u7528\u5185\u5b58\u603b\u91cf<\/p>\n

long memory = (long) (StoreUtil.TOTAL_PHYSICAL_MEMORY_SIZE<\/em><\/p>\n

<\/em>* (this.messageStoreConfig.getAccessMessageInMemoryMaxRatio() \/ 100.0));<\/p>\n

\/\/\u770b\u662f\u4e0d\u662f\u63a5\u4e0b\u6765\u9700\u8981\u62c9\u53d6\u7684\u6d88\u606f\u8d85\u8fc7\u4e86\u5e38\u9a7b\u6d88\u606f<\/p>\n

getResult.setSuggestPullingFromSlave(diff > memory);<\/td>\n<\/tr>\n<\/table>\n

\u5982\u679c\u8bbe\u7f6e\u4e86\u9700\u8981\u53bb\u4eceBroker\u4e0a\u62c9\u53d6,\u90a3\u4e48\u5c31\u8fd4\u56de\u5982\u4e0b\u7684BrokerId<\/p>\n\n\n
\n if (getMessageResult.isSuggestPullingFromSlave()) {<\/p>\n

responseHeader.setSuggestWhichBrokerId(subscriptionGroupConfig.getWhichBrokerWhenConsumeSlowly());<\/p>\n

}<\/td>\n<\/tr>\n<\/table>\n

\u4e0a\u9762\u8fd4\u56de\u4e86\u914d\u7f6e\u4e2d\u5efa\u8bae\u8d44\u6e90\u4e0d\u8db3\u65f6\u53bb\u62c9\u53d6\u7684BrokerId,\u9ed8\u8ba4\u4e3a1,\u5982\u679c\u4e00\u4e2aMaster\u62e5\u6709\u591a\u4e2a\u670d\u52a1\u5668,\u53c2\u4e0e\u62c9\u53d6\u7684\u4ece\u670d\u52a1\u5668\u53ea\u4f1a\u662f\u5176\u4e2d\u4e4b\u4e00<\/p>\n

\u5173\u4e8e\u672c\u7ae0,\u56e0\u4e3a\u603b\u4f53\u5e76\u4e0d\u957f,\u6240\u4ee5\u53ef\u4ee5\u7b80\u5355\u7684\u603b\u7ed3\u4e00\u4e0b<\/p>\n

RMQ\u7684HA\u673a\u5236,\u662f\u4ece\u670d\u52a1\u5668\u5728\u542f\u52a8\u7684\u65f6\u5019\u5f80\u4e3b\u670d\u52a1\u5668\u5efa\u7acb\u4e00\u4e2aChannel,\u7136\u540e\u83b7\u53d6\u5230commitLog\u7684\u6700\u5927\u504f\u79fb\u91cf,\u5229\u7528\u672c\u670d\u52a1\u5668\u7684\u6700\u5927\u504f\u79fb\u91cf\u5411\u7740\u4e3b\u670d\u52a1\u5668\u62c9\u53d6\u6d88\u606f<\/p>\n

\u4e3b\u670d\u52a1\u5668\u6839\u636e\u4ece\u670d\u52a1\u5668\u7684\u504f\u79fb\u91cf\u548c\u81ea\u8eabcommitlog\u7684\u6700\u5927\u504f\u79fb\u91cf\u8fdb\u884c\u6bd4\u8f83,\u7136\u540e\u6765\u8fd4\u56de\u4e00\u5b9a\u6570\u91cf\u7684\u6570\u636e,\u76f4\u5230\u4e3b\u4ece\u540c\u6b65\u5b8c\u6210<\/p>\n

RMQ\u7684\u8bfb\u5199\u5206\u79bb,\u5219\u662f\u6d88\u8d39\u8005\u5148\u5411\u4e3b\u670d\u52a1\u5668\u53d1\u8d77\u4e00\u4e2a\u6d88\u606f\u62c9\u53bb,\u7136\u540e\u4e3b\u670d\u52a1\u5668\u8fd4\u56de\u4e00\u6279\u6570\u636e,\u5e76\u4e14\u4e3b\u670d\u52a1\u5668\u6839\u636e\u81ea\u8eab\u8d1f\u8f7d\u60c5\u51b5,\u8fd4\u56de\u4e0b\u6b21\u62c9\u53d6\u662f\u4ece\u4e3b\u670d\u52a1\u5668\u8fd8\u662f\u4ece\u670d\u52a1\u5668\u62c9\u53d6<\/p>\n","protected":false},"excerpt":{"rendered":"

\u4ece\u670d\u52a1\u5668\u5982\u4f55\u5728\u6d88\u606f\u62c9\u53d6\u7684\u65f6\u5019\u53c2 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[19],"tags":[],"_links":{"self":[{"href":"http:\/\/xinblog.ltd\/index.php?rest_route=\/wp\/v2\/posts\/3012"}],"collection":[{"href":"http:\/\/xinblog.ltd\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/xinblog.ltd\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/xinblog.ltd\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/xinblog.ltd\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3012"}],"version-history":[{"count":0,"href":"http:\/\/xinblog.ltd\/index.php?rest_route=\/wp\/v2\/posts\/3012\/revisions"}],"wp:attachment":[{"href":"http:\/\/xinblog.ltd\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3012"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/xinblog.ltd\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3012"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/xinblog.ltd\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3012"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}