{"id":1043,"date":"2014-08-30T16:56:41","date_gmt":"2014-08-30T08:56:41","guid":{"rendered":"http:\/\/coderbee.net\/?p=1043"},"modified":"2014-08-30T17:08:09","modified_gmt":"2014-08-30T09:08:09","slug":"%e7%94%a8%e7%ba%bf%e7%a8%8b%e6%b1%a0%e5%a4%84%e7%90%86-mq-%e6%b6%88%e6%81%af%e5%bc%95%e8%b5%b7%e7%9a%84%e6%95%85%e9%9a%9c","status":"publish","type":"post","link":"https:\/\/coderbee.net\/index.php\/notes\/20140830\/1043","title":{"rendered":"\u4e0d\u6070\u5f53\u4f7f\u7528\u7ebf\u7a0b\u6c60\u5904\u7406 MQ \u6d88\u606f\u5f15\u8d77\u7684\u6545\u969c"},"content":{"rendered":"

\u73b0\u72b6<\/h3>\n

\u4e1a\u52a1\u90e8\u95e8\u53cd\u5e94\u7f51\u7ad9\u8bbf\u95ee\u7279\u522b\u6162\uff0c\u8d1f\u8d23\u8fd0\u7ef4\u76d1\u63a7\u7684\u540c\u4e8b\u8bf4MQ\u6d88\u606f\u961f\u5217\u79ef\u538b\u4e86\uff0c\u4e2d\u95f4\u4ef6\u7684\u8bf4\u5e94\u7528\u670d\u52a1\u5668\u5185\u5b58\u5360\u7528\u5f88\u9ad8\uff0cGC \u4e00\u76f4\u56de\u6536\u4e0d\u4e86\u5185\u5b58\uff0cGC \u7ebf\u7a0b\u5360\u4e86\u8fd1 100% \u7684 CPU\uff0c\u5176\u4ed6\u7684\u57fa\u672c\u4e0a\u90fd\u5728\u7b49\u5f85\uff0c\u6570\u636e\u5e93\u5f88\u6b63\u5e38\uff0c\u5b8c\u5168\u6ca1\u538b\u529b\u3002\u6ca1\u5565\u529e\u6cd5\uff0c\u7ebf\u7a0b\u3001\u5806 dump \u51fa\u6765\u540e\uff0c\u91cd\u542f\u5427\uff0c\u7136\u540e\u5e94\u7528\u53c8\u6b63\u5e38\u4e86\u3002<\/p>\n

\u5206\u6790<\/h3>\n

\u8fd9\u79cd\u6545\u969c\u4e4b\u524d\u5176\u5b9e\u4e5f\u78b0\u5230\u8fc7\u4e86\uff0c\u5206\u6790\u4e86\u5f53\u65f6 dump \u51fa\u6765\u7684\u5806\u540e\u53d1\u73b0\uff0c\u5904\u7406 MQ \u6d88\u606f\u7684\u7ebf\u7a0b\u6c60\u7684\u961f\u5217\u957f\u5ea6\u8fbe\u767e\u4e07\u7ea7\u522b\uff0c\u5360\u7528\u4e86\u8d85\u8fc7 1.3G \u5185\u5b58\uff0c\u8fd9\u4e9b\u5185\u5b58\u90fd\u662f\u6ca1\u6cd5\u56de\u6536\u7684\u3002<\/p>\n

\u7a0b\u5e8f\u7684\u5b9e\u73b0\u76ee\u524d\u662f\u8fd9\u6837\u7684\uff1a\u5173\u8054\u7cfb\u7edf\u628a\u6d88\u606f\u63a8\u9001\u5230 MQ \u4e0a\uff0c\u6211\u4eec\u518d\u4ece MQ \u4e0a\u62c9\u6d88\u606f\u4e0b\u6765\u5904\u7406\uff1b\u6bcf\u79cd\u7c7b\u578b\u7684\u6d88\u606f\u90fd\u6709\u4e00\u4e2a\u7ebf\u7a0b\u8d1f\u8d23\u4ece MQ \u4e0a\u62c9\u6d88\u606f\uff0c\u62c9\u4e0b\u6765\u540e\u5c01\u88c5\u6210\u7ebf\u7a0b\u6c60\u7684\u4efb\u52a1\u63d0\u4ea4\u7ed9\u76f8\u5e94\u7684\u7ebf\u7a0b\u6c60\u53bb\u6267\u884c\u3002\u4ee3\u7801\u53ef\u4ee5\u7b80\u5316\u4e3a\uff1a<\/p>\n

package net.coderbee.mq.demo;\n\nimport java.util.concurrent.ExecutorService;\nimport java.util.concurrent.Executors;\n\npublic class MQListener {\n     public ExecutorService executor = Executors.newFixedThreadPool(8);\n\n     public void onMessage(final Object message) {\n          executor.execute(new Runnable() {\n               @Override\n               public void run() {\n                    \/\/ \u8017\u65f6\u4e14\u590d\u6742\u7684\u6d88\u606f\u5904\u7406\u903b\u8f91\n                    complicateHanlde(message);\n               }\n          });\n     }\n\n     private void complicateHanlde(Object message) {\n     }\n}\n<\/code><\/pre>\n
<\/p>\n
\u8fd9\u4e2a\u5b9e\u73b0\u5c31\u662f\u5bfc\u81f4\u6545\u969c\u7684\u6839\u6e90\uff0cExecutors.newFixedThreadPool(8)<\/code> \u521b\u5efa\u7684\u7ebf\u7a0b\u6c60\u7684\u4efb\u52a1\u961f\u5217\u662f\u65e0\u8fb9\u754c\u7684\uff1a<\/p>\n
public static ExecutorService newFixedThreadPool(int nThreads) {\n     return new ThreadPoolExecutor(nThreads, nThreads,\n                                          0L, TimeUnit.MILLISECONDS,\n                                          new LinkedBlockingQueue<Runnable>());\n}\n<\/code><\/pre>\n
\u5f53\u65f6\u662f\u5173\u8054\u7cfb\u7edf\u51fa\u6545\u969c\u4e86\uff0c\u4ed6\u4eec\u6062\u590d\u540e\uff0c\u5f80 MQ \u91cc\u72c2\u63a8\u6d88\u606f\uff0c\u6211\u4eec\u7cfb\u7edf\u91cc\u9762\u7684 MQListener \u4e0d\u65ad\u5730\u4ece MQ \u62c9\u6d88\u606f\u4e0b\u6765\uff0c\u76f4\u63a5\u585e\u8fdb\u7ebf\u7a0b\u6c60\u91cc\uff0c\u7531\u4e8e\u7ebf\u7a0b\u6c60\u5904\u7406\u6d88\u606f\u7684\u901f\u5ea6\u8fdc\u8fdc\u6162\u4e8e\u6d88\u606f\u8fdb\u5165\u7684\u901f\u5ea6\uff0c\u6240\u4ee5\u7ebf\u7a0b\u6c60\u7684\u961f\u5217\u4e0d\u65ad\u589e\u957f\uff0c\u76f4\u5230\u628a\u6240\u6709\u7684\u5806\u5185\u5b58\u90fd\u5360\u7528\u4e86\uff0c\u8fd9\u65f6\u4e0d\u65ad\u5f15\u53d1 FullGC\uff0c\u4f46\u6bcf\u6b21 FullGC \u90fd\u6ca1\u6cd5\u56de\u6536\u5230\u5185\u5b58\uff0c\u5e94\u7528\u4e5f\u5c31\u6302\u6b7b\u5728\u90a3\u4e86\u3002<\/p>\n
\u4e4b\u524d\u90a3\u6b21\u6545\u969c\u4e5f\u662f\u7ebf\u7a0b\u6c60\u961f\u5217\u79ef\u538b\u5bfc\u81f4\u7684\uff0c\u5f15\u8d77\u7684\u539f\u56e0\u662f\u6d88\u606f\u5904\u7406\u903b\u8f91\u8c03\u7528\u4e86\u5916\u90e8\u63a5\u53e3\uff0c\u7531\u4e8e\u5916\u90e8\u63a5\u53e3\u7684\u54cd\u5e94\u975e\u5e38\u6162\uff0c\u4e25\u91cd\u62d6\u6162\u4e86\u6d88\u606f\u7684\u5904\u7406\u8fdb\u5ea6\uff0c\u6539\u6210\u5f02\u6b65\u8c03\u7528\u4e4b\u540e\u597d\u4e86\u4e9b\u3002\u4f46\u95ee\u9898\u7684\u6839\u6e90\u5e76\u6ca1\u6709\u89e3\u51b3\uff0c\u5c31\u50cf\u6628\u5929\u5173\u8054\u7cfb\u7edf\u72c2\u63a8\u6d88\u606f\u540e\uff0c\u6211\u4eec\u7684\u7cfb\u7edf\u8fd8\u662f\u6302\u4e86\u3002<\/p>\n
\u89e3\u51b3\u65b9\u6cd5<\/h3>\n
\u6211\u7684\u601d\u8def\u5176\u5b9e\u5f88\u7b80\u5355\uff0cMQ \u662f\u7528\u6765\u7cfb\u7edf\u95f4\u89e3\u8026\u7684\uff0c\u4e5f\u662f\u4e00\u4e2a\u7f13\u51b2\uff0c\u76ee\u524d\u7684\u5b9e\u73b0\u662f\u628a\u5904\u7406\u6d88\u606f\u7684\u7ebf\u7a0b\u6c60\u53c8\u7528\u4f5c\u4e00\u4e2a MQ \u4e86\uff0c\u6d88\u606f\u4e0d\u80fd\u4e0d\u53d7\u63a7\u5730\u8fdb\u5165\u7ebf\u7a0b\u6c60\u7684\u4efb\u52a1\u961f\u5217\uff0c\u6240\u4ee5\uff0c\u8981\u6362\u6210\u4f7f\u7528\u5b9a\u957f\u7684\u963b\u585e\u961f\u5217\uff0c\u961f\u5217\u6ee1\u4e86\u5c31\u6682\u505c\u62c9\u53d6\u6d88\u606f\u3002\u628a\u7ebf\u7a0b\u6c60\u66ff\u6362\u6210\uff1a<\/p>\n
private int nThreads = 8;\nprivate int MAX_QUEUQ_SIZE = 2000;\nprivate ExecutorService executor = new ThreadPoolExecutor(nThreads,\n          nThreads, 0L, TimeUnit.MILLISECONDS,\n          new ArrayBlockingQueue<Runnable>(MAX_QUEUQ_SIZE),\n          new ThreadPoolExecutor.CallerRunsPolicy());\n<\/code><\/pre>\n
\u628a\u7ebf\u7a0b\u6c60\u961f\u5217\u6ee1\u7684\u65f6\u5019\u76f4\u63a5\u8ba9\u8c03\u7528\u8005\uff08\u4e5f\u5c31\u662f MQListener<\/code>\uff09\u6267\u884c\u4efb\u52a1\uff0c\u8fd9\u6837\u5373\u5ef6\u7f13\u4e86\u6d88\u606f\u62c9\u53d6\u7684\u901f\u5ea6\uff0c\u5f53 MQListener<\/code> \u518d\u53bb\u62c9\u53d6\u6d88\u606f\u65f6\uff0c\u53d1\u73b0\u7ebf\u7a0b\u6c60\u6709\u7a7a\u95f4\u65f6\u53ef\u4ee5\u63d0\u4ea4\u5230\u7ebf\u7a0b\u6c60\uff0c\u8ba9\u7ebf\u7a0b\u6c60\u7684\u5de5\u4f5c\u7ebf\u7a0b\u53bb\u5904\u7406\uff0c\u5b83\u7ee7\u7eed\u4fdd\u6301\u62c9\u53d6\u901f\u5ea6\u3002<\/p>\n
\u8fd9\u6837\u65e2\u63a7\u5236\u4e86\u7ebf\u7a0b\u6c60\u5360\u7528\u7684\u5185\u5b58\uff0c\u53c8\u53ef\u4ee5\u8ba9\u6d88\u606f\u5904\u7406\u7ebf\u7a0b\u6c60\u5904\u7406\u4e0d\u8fc7\u6765\u65f6\u591a\u4e00\u4e2a\u7ebf\u7a0b\u5904\u7406\u6d88\u606f\u3002<\/p>\n
\u7531\u4e8e\u4e0a\u9762\u7684\u4ee3\u7801\u91c7\u7528\u8c03\u7528\u8005\u6267\u884c\u7684\u65b9\u5f0f\uff0c\u90a3\u4e48\u8981\u8003\u8651\u6d88\u606f\u5904\u7406\u7684\u987a\u5e8f\u95ee\u9898\uff0c\u6bd4\u5982\u4e00\u4e2a\u8ba2\u5355\u7684\u5904\u7406\u53ef\u80fd\u6709\u591a\u4e2a\u6b65\u9aa4\uff0c\u5bf9\u5e94\u591a\u6761 MQ \u6d88\u606f\uff0c\u90a3\u4e48\u8981\u8003\u8651\u8fd9\u4e9b\u6b65\u9aa4\u5982\u679c\u4e71\u5e8f\u4e86\u662f\u5426\u53ef\u4ee5\u63a5\u53d7\uff0c\u56e0\u4e3a\u7b2c3\u6b65\u9aa4\u7684\u5904\u7406\u6d88\u606f\u53ef\u80fd\u88ab MQListener \u5904\u7406\u4e86\uff0c\u800c\u7b2c2\u6b65\u7684\u5904\u7406\u6d88\u606f\u8fd8\u79ef\u538b\u5728\u7ebf\u7a0b\u6c60\u91cc\u3002<\/p>\n\n
\u6b22\u8fce\u5173\u6ce8\u6211\u7684\u5fae\u4fe1\u516c\u4f17\u53f7: coderbee\u7b14\u8bb0<\/strong>\uff0c\u53ef\u4ee5\u66f4\u53ca\u65f6\u56de\u590d\u4f60\u7684\u8ba8\u8bba\u3002<\/p>\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
\u73b0\u72b6 \u4e1a\u52a1\u90e8\u95e8\u53cd\u5e94\u7f51\u7ad9\u8bbf\u95ee\u7279\u522b\u6162\uff0c\u8d1f\u8d23\u8fd0\u7ef4\u76d1\u63a7\u7684\u540c\u4e8b\u8bf4MQ\u6d88\u606f\u961f\u5217\u79ef\u538b\u4e86\uff0c\u4e2d\u95f4\u4ef6 … \u7ee7\u7eed\u9605\u8bfb →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[59],"tags":[196,197],"_links":{"self":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/1043"}],"collection":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/comments?post=1043"}],"version-history":[{"count":3,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/1043\/revisions"}],"predecessor-version":[{"id":1046,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/1043\/revisions\/1046"}],"wp:attachment":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/media?parent=1043"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/categories?post=1043"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/tags?post=1043"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}