{"id":2689,"date":"2021-04-19T21:48:29","date_gmt":"2021-04-19T13:48:29","guid":{"rendered":"\/?p=2689"},"modified":"2021-04-19T21:48:29","modified_gmt":"2021-04-19T13:48:29","slug":"4-1-rmq%e7%9a%84%e6%b6%88%e6%81%af%e4%bd%93","status":"publish","type":"post","link":"http:\/\/xinblog.ltd\/?p=2689","title":{"rendered":"4.1 RMQ\u7684\u6d88\u606f\u4f53"},"content":{"rendered":"<p>RMQ\u652f\u6301\u4e09\u79cd\u6d88\u606f\u53d1\u9001\u65b9\u5f0f, \u540c\u6b65 \u5f02\u6b65 \u5355\u5411<\/p>\n<p>\u540c\u6b65\u7684\u65f6\u5019,\u53d1\u9001\u6d88\u606f,\u963b\u585e\u7b49\u5f85,\u76f4\u5230\u6d88\u606f\u670d\u52a1\u5668\u8fd4\u56de\u53d1\u9001\u7ed3\u679c<\/p>\n<p>\u5f02\u6b65\u7684\u65f6\u5019,\u5e76\u4e0d\u963b\u585e,\u800c\u662f\u5728\u6210\u529f\u540e\u6267\u884c\u5bf9\u5e94\u7684\u56de\u8c03\u51fd\u6570,\u56de\u8c03\u51fd\u6570\u5728\u4e00\u4e2a\u65b0\u7684\u7ebf\u7a0b\u4e2d\u6267\u884c<\/p>\n<p>\u5355\u5411,\u53d1\u9001\u6d88\u606fAPI\u540e\u76f4\u63a5\u8fd4\u56de,\u5e76\u4e0d\u5173\u5fc3\u6d88\u606f\u662f\u5426\u53d1\u9001\u6210\u529f<\/p>\n<p>\u90a3\u4e48\u6211\u4eec\u8bf4\u4e00\u4e0bRMQ\u7684\u6d88\u606f<\/p>\n<p>RMQ\u7684\u6d88\u606f\u4e3b\u8981\u5305\u542b\u4e3b\u9898topic,\u6d88\u606fFlag,\u5c5e\u6027,\u6d88\u606f\u4f53<\/p>\n<p>Message\u88ab\u5c01\u88c5\u4e3a\u4e86<\/p>\n<p>package org.apache.rocketmq.common.message;<\/p>\n<p>\u4e3b\u8981\u7684\u5c5e\u6027\u6709 topic \u6d88\u606fFlag \u6269\u5c55\u5c5e\u6027 \u6d88\u606f\u4f53<\/p>\n<p>RocketMQ\u5b9a\u4e49\u7684MessageFlag\u5982\u4e0b\u6240\u793a<\/p>\n<table>\n<tr>\n<td>\n  public class MessageSysFlag {<\/p>\n<p>public final static int <em>COMPRESSED_FLAG <\/em>= 0x1;<\/p>\n<p>public final static int <em>MULTI_TAGS_FLAG <\/em>= 0x1 &lt;&lt; 1;<\/p>\n<p>public final static int <em>TRANSACTION_NOT_TYPE <\/em>= 0;<\/p>\n<p>public final static int <em>TRANSACTION_PREPARED_TYPE <\/em>= 0x1 &lt;&lt; 2;<\/p>\n<p>public final static int <em>TRANSACTION_COMMIT_TYPE <\/em>= 0x2 &lt;&lt; 2;<\/p>\n<p>public final static int <em>TRANSACTION_ROLLBACK_TYPE <\/em>= 0x3 &lt;&lt; 2;<\/p>\n<p>public final static int <em>BORNHOST_V6_FLAG <\/em>= 0x1 &lt;&lt; 4;<\/p>\n<p>public final static int <em>STOREHOSTADDRESS_V6_FLAG <\/em>= 0x1 &lt;&lt; 5;<\/td>\n<\/tr>\n<\/table>\n<p>\u57fa\u672c\u4e0a\u90fd\u662f\u57fa\u4e8e\u4f4d\u8fd0\u7b97\u7684Flag<\/p>\n<p>\u521b\u5efaMessage\u7684\u6784\u9020\u51fd\u6570<\/p>\n<table>\n<tr>\n<td>\n  public Message(String topic, String tags, String keys, int flag, byte[] body, boolean waitStoreMsgOK) {<\/p>\n<p>\/\/\u4e3b\u9898<\/p>\n<p>this.topic = topic;<\/p>\n<p>\/\/Flag<\/p>\n<p>this.flag = flag;<\/p>\n<p>\/\/\u4e3b\u9898<\/p>\n<p>this.body = body;<\/p>\n<p>\/\/\u8bbe\u7f6e\u5c5e\u6027,\u5e26\u6709Tags<\/p>\n<p>if (tags != null &amp;&amp; tags.length() &gt; 0)<\/p>\n<p>this.setTags(tags);<\/p>\n<p>\/\/\u8bbe\u7f6e\u5c5e\u6027,\u5e26\u6709keys<\/p>\n<p>if (keys != null &amp;&amp; keys.length() &gt; 0)<\/p>\n<p>this.setKeys(keys);<\/p>\n<p>\/\/\u662f\u5426\u7b49\u5f85\u6d88\u606f\u5b58\u50a8\u5b8c\u6210<\/p>\n<p>this.setWaitStoreMsgOK(waitStoreMsgOK);<\/p>\n<p>\/\/\u6b64\u4e0a\u4e09\u8005,\u90fd\u5b58\u50a8\u5728Message\u7684properties\u4e2d,\u4e00\u4e2aHashMap\u4e2d<\/p>\n<p>}<\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p>RMQ\u652f\u6301\u4e09\u79cd\u6d88\u606f\u53d1\u9001\u65b9\u5f0f,  [&hellip;]<\/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\/2689"}],"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=2689"}],"version-history":[{"count":0,"href":"http:\/\/xinblog.ltd\/index.php?rest_route=\/wp\/v2\/posts\/2689\/revisions"}],"wp:attachment":[{"href":"http:\/\/xinblog.ltd\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2689"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/xinblog.ltd\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2689"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/xinblog.ltd\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2689"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}