{"id":1625,"date":"2018-04-11T19:25:39","date_gmt":"2018-04-11T11:25:39","guid":{"rendered":"http:\/\/coderbee.net\/?p=1625"},"modified":"2018-04-12T11:52:56","modified_gmt":"2018-04-12T03:52:56","slug":"rxjava-%e7%ba%bf%e7%a8%8b%e6%a8%a1%e5%9e%8b","status":"publish","type":"post","link":"https:\/\/coderbee.net\/index.php\/framework\/20180411\/1625","title":{"rendered":"RxJava \u7ebf\u7a0b\u6a21\u578b"},"content":{"rendered":"<p>\u672c\u6587\u57fa\u4e8e RxJava 2.1.2 \u3002\u6839\u636e\u4ee3\u7801\u548c\u8f93\u51fa\u65e5\u5fd7\u4f1a\u66f4\u5bb9\u6613\u7406\u89e3\u3002<\/p>\n<h1>RxJava \u7684\u7ebf\u7a0b\u6a21\u578b\u5982\u4e0b\uff1a<\/h1>\n<h2>1. \u4e0d\u6307\u5b9a\u7ebf\u7a0b\u7684\u60c5\u51b5<\/h2>\n<ul>\n<li>\u4e0d\u6307\u5b9a\u7ebf\u7a0b\u4e5f\u5c31\u662f\u4e0d\u4f7f\u7528 <code>observeOn<\/code> \u548c <code>subscribeOn<\/code>\uff0c\u6240\u6709\u64cd\u4f5c\u5728\u8c03\u7528 <code>subscribe<\/code> \u7684\u7ebf\u7a0b\u6267\u884c\u3002<\/li>\n<\/ul>\n<pre><code class=\"java\">@Test\npublic void noThread() {\n    buildObservable().subscribe();\n}\n<\/code><\/pre>\n<p>\u4e0a\u9762\u4ee3\u7801\u7684\u8f93\u51fa\u4e3a\uff1a<\/p>\n<pre><code>Thread[main]   execute   Action start emmit\nThread[main]   execute   Operation-1, event: 1\nThread[main]   execute   Operation-2, event: 1\n<\/code><\/pre>\n<h2>2. subscribeOn<\/h2>\n<ul>\n<li><code>subscribeOn<\/code> \u4e0d\u7ba1\u8c03\u7528\u591a\u5c11\u6b21\uff0c\u53ea\u4ee5\u7b2c\u4e00\u6b21\u4e3a\u51c6\u3002\u5982\u679c\u53ea\u4f7f\u7528\u4e86 <code>subscribeOn<\/code>\u3001\u6ca1\u6709\u4f7f\u7528 <code>observeOn<\/code>\uff0c\u5219\u6240\u6709\u64cd\u4f5c\u5728\u7b2c\u4e00\u6b21\u8c03\u7528\u751f\u6210\u7684\u7ebf\u7a0b\u91cc\u6267\u884c\u3002<\/li>\n<\/ul>\n<pre><code class=\"java\">@Test\npublic void subscribeOn() throws InterruptedException {\n    CountDownLatch latch = new CountDownLatch(1);\n\n    Observable&lt;Integer&gt; observable = buildObservable();\n    observable\n        .subscribeOn(scheduler(\"subscribeOn-1\"))\n        .subscribeOn(scheduler(\"subscribeOn-2\"))\n        .subscribe(i -&gt; {\n            showMessageWithThreadName(\"Action subscribe\");\n            latch.countDown();\n        });\n\n    latch.await();\n}\n<\/code><\/pre>\n<p>\u4e0a\u9762\u4ee3\u7801\u7684\u8f93\u51fa\u4e3a\uff1a<\/p>\n<pre><code>create scheduler subscribeOn-2\ncreate scheduler subscribeOn-1\nThread[subscribeOn-1]   execute   Action start emmit\nThread[subscribeOn-1]   execute   Operation-1, event: 1\nThread[subscribeOn-1]   execute   Operation-2, event: 1\nThread[subscribeOn-1]   execute   Action subscribe\n<\/code><\/pre>\n<h2>3. observeOn<\/h2>\n<ul>\n<li><code>observeOn<\/code> \u5fc5\u987b\u8ddf <code>subscribeOn<\/code> \u4e00\u8d77\u4f7f\u7528\uff0c\u5355\u72ec\u4f7f\u7528\u4f1a\u629b\u51fa\u7a7a\u5f15\u7528\u5f02\u5e38\u3002<\/li>\n<li><code>observeOn<\/code> \u5e94\u5728 <code>subscribeOn<\/code> \u7684\u540e\u9762\u8c03\u7528\uff0c\u5426\u5219\u4f1a\u51fa\u73b0\u6b7b\u9501\u7684\u60c5\u51b5\u3002<\/li>\n<li><code>observeOn<\/code> \u64cd\u4f5c\u4f1a\u66f4\u6539\u540e\u7eed\u64cd\u4f5c\u7684\u6267\u884c\u7ebf\u7a0b\uff0c\u76f4\u81f3\u4e0b\u4e00\u4e2a <code>observeOn<\/code> \u8c03\u7528\u4e4b\u524d\u7684\u64cd\u4f5c\u6216 <code>subscribe<\/code> \u64cd\u4f5c\u3002<\/li>\n<\/ul>\n<p><!--more--><\/p>\n<pre><code class=\"java\">@Test\npublic void observeOn() throws InterruptedException {\n    CountDownLatch latch = new CountDownLatch(1);\n\n    Observable&lt;Integer&gt; observable = buildObservable();\n    observable\n        .subscribeOn(scheduler(\"subscribeOn-1\"))\n        .observeOn(scheduler(\"observeOn-1\"))\n        .doOnNext(i -&gt; {\n            showMessageWithThreadName(\"Operation-3, event: \" + i);\n        })\n        .observeOn(scheduler(\"observeOn-2\"))\n        .subscribe(i -&gt; {\n            showMessageWithThreadName(\"subscribe  \" + i);\n            latch.countDown();\n        });\n\n    latch.await();\n}\n<\/code><\/pre>\n<p>\u4e0a\u9762\u4ee3\u7801\u7684\u8f93\u51fa\u4e3a\uff1a<\/p>\n<pre><code>create scheduler subscribeOn-1\nThread[subscribeOn-1]   execute   Action start emmit\nThread[subscribeOn-1]   execute   Operation-1, event: 1\nThread[subscribeOn-1]   execute   Operation-2, event: 1\ncreate scheduler observeOn-1\nThread[observeOn-1]   execute   Operation-3, event: 1\ncreate scheduler observeOn-2\nThread[observeOn-2]   execute   subscribe  1\n<\/code><\/pre>\n<h2>4. \u8f85\u52a9\u4ee3\u7801<\/h2>\n<pre><code class=\"java\">\/\/ \u8fd4\u56de\u7528\u7ed9\u5b9a\u7ebf\u7a0b\u540d \u547d\u540d\u7684Scheduler\nprivate Scheduler scheduler(String name) {\n    return Schedulers.from(Executors.newSingleThreadExecutor(new ThreadFactory() {\n        @Override\n        public Thread newThread(Runnable r) {\n            System.out.println(\"create scheduler \" + name);\n            Thread t = new Thread(r, name);\n            return t;\n        }\n    }));\n}\n\n\/\/ \u8f93\u51fa\u5f53\u524d\u7ebf\u7a0b\u540d\u548c\u7ed9\u7684\u6d88\u606f\nprivate void showMessageWithThreadName(String msg) {\n    Thread t = Thread.currentThread();\n    System.out.printf(\"%-10s   execute   %s\\n\", \"Thread[\" + t.getName() + \"]\", msg);\n}\n\n\/\/ \u6784\u5efa\u4e00\u4e2a\u5e26\u6709\u4e24\u4e2a\u4e2d\u95f4\u64cd\u4f5c\u7684 Observable\nprivate Observable&lt;Integer&gt; buildObservable() {\n    return Observable.fromPublisher((Subscriber&lt;? super Integer&gt; s) -&gt; {\n        showMessageWithThreadName(\"Action start emmit\");\n        \/\/ \u6d88\u606f\u6e90\n        s.onNext(1);\n        s.onComplete();\n    })\n    .doOnNext(i -&gt; {\n        showMessageWithThreadName(\"Operation-1, event: \" + i);\n    })\n    .doOnNext(i -&gt; {\n        showMessageWithThreadName(\"Operation-2, event: \" + i);\n    });\n}\n<\/code><\/pre>\n<h1>\u4e8c. \u7ebf\u7a0b\u5207\u6362\u5b9e\u73b0\u5206\u6790<\/h1>\n<p><code>subscribeOn<\/code> \u548c <code>observeOn<\/code> \u884c\u4e3a\u5dee\u5f02\u7684\u539f\u56e0\u662f\u5b83\u4eec\u7684\u8c03\u5ea6\u65f6\u673a\u3001\u6267\u884c\u673a\u5236\u4e0d\u540c\u3002<\/p>\n<h2>1. subscribeOn<\/h2>\n<p><code>subscribeOn<\/code> \u662f\u5728\u8c03\u7528 <code>subscribe<\/code> \u65f6\u89e6\u53d1\u3002<\/p>\n<p><code>subscribeOn<\/code> \u53ea\u662f\u628a  <code>subscribe<\/code> \u7684\u8c03\u7528\u653e\u5230\u7ed9\u5b9a\u7684\u8c03\u5ea6\u5668\u4e0a\u53bb\u6267\u884c\uff0c\u5982\u679c\u5148\u540e\u58f0\u660e\u4e86\u4e24\u4e2a\u8c03\u5ea6\u5668 S1\u3001S2\uff0c\u5219 S2 \u628a\u52a8\u4f5c\u8c03\u5ea6\u7ed9 S1 \u540e\uff0c\u771f\u6b63\u7684\u903b\u8f91\u662f\u5728 S1 \u4e0a\u6267\u884c\uff0c\u6240\u4ee5\u6ca1\u6709\u5fc5\u987b\u58f0\u660e\u4e24\u4e2a subscribeOn \u8c03\u5ea6\u5668\u3002<\/p>\n<h2>2. observeOn<\/h2>\n<p><code>observeOn<\/code> \u662f\u5728\u8c03\u7528 <code>onNext<\/code> \u65f6\u89e6\u53d1\u3002<\/p>\n<p><code>observeOn<\/code> \u7684\u5b9e\u73b0\u662f\u5728 <code>ObservableObserveOn<\/code> \u7c7b\u91cc\uff0c\u4f7f\u7528\u5185\u90e8\u7c7b <code>ObserveOnObserver<\/code> \u4f5c\u4e3a\u4e0a\u6e38\u7684\u8ba2\u9605\u8005\u3001\u4e0b\u6e38\u7684\u6d88\u606f\u6765\u6e90\u3001\u5373\u4e3b\u9898\u3002<code>ObserveOnObserver<\/code> \u5f15\u5165\u4e00\u4e2a\u961f\u5217\u4f5c\u4e3a\u7ebf\u7a0b\u534f\u8c03\u673a\u5236\uff0c\u524d\u9762\u7684\u4e8b\u4ef6\u5904\u7406\u7ebf\u7a0b\u901a\u77e5 <code>ObserveOnObserver<\/code> \u65f6\uff0c\u628a\u4e8b\u4ef6\u653e\u5165\u961f\u5217\uff0c\u89e6\u53d1\u8c03\u5ea6\u5668\u6267\u884c\uff0c\u7136\u540e\u8fd4\u56de\uff1b\u8c03\u5ea6\u5668\u6267\u884c\u65f6\uff0c\u4e0d\u65ad\u4ece\u961f\u5217\u53d6\u51fa\u4e8b\u4ef6\u8fdb\u884c\u5904\u7406\u3001\u76f4\u81f3\u6240\u6709\u4e8b\u4ef6\u5904\u7406\u5b8c\u6210\u3002<\/p>\n<p>\u66f4\u591a\u7684\u5b9e\u73b0\u7ec6\u8282\u53ef\u4ee5\u770b\u6e90\u7801\u3002<\/p>\n<hr\/>\n<p>\u6b22\u8fce\u5173\u6ce8\u6211\u7684\u5fae\u4fe1\u516c\u4f17\u53f7: <strong>coderbee\u7b14\u8bb0<\/strong>\uff0c\u53ef\u4ee5\u66f4\u53ca\u65f6\u56de\u590d\u4f60\u7684\u8ba8\u8bba\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"258\" height=\"258\" src=\"https:\/\/coderbee.net\/wp-content\/uploads\/2019\/01\/coderbee-note.jpg\" class=\"alignnone size-full wp-image-1707\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u672c\u6587\u57fa\u4e8e RxJava 2.1.2 \u3002\u6839\u636e\u4ee3\u7801\u548c\u8f93\u51fa\u65e5\u5fd7\u4f1a\u66f4\u5bb9\u6613\u7406\u89e3\u3002 RxJa &hellip; <a href=\"https:\/\/coderbee.net\/index.php\/framework\/20180411\/1625\">\u7ee7\u7eed\u9605\u8bfb <span class=\"meta-nav\">&rarr;<\/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":[255],"tags":[294],"_links":{"self":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/1625"}],"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=1625"}],"version-history":[{"count":3,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/1625\/revisions"}],"predecessor-version":[{"id":1628,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/1625\/revisions\/1628"}],"wp:attachment":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/media?parent=1625"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/categories?post=1625"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/tags?post=1625"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}