{"id":115,"date":"2016-02-16T08:33:53","date_gmt":"2016-02-16T08:33:53","guid":{"rendered":"https:\/\/boochlin.com\/?p=115"},"modified":"2026-09-16T09:54:13","modified_gmt":"2026-09-16T09:54:13","slug":"naming-threads-and-thread-pools-of-executorservice","status":"publish","type":"post","link":"https:\/\/boochlin.com\/?p=115","title":{"rendered":"Naming threads and thread pools of ExecutorService"},"content":{"rendered":"<p>\u5982\u4f55\u66ff ExecutorService \u6240\u7ba1\u7406\u7684 thread \u8a2d\u5b9a\u4e00\u500b\u81ea\u5df1\u770b\u5f97\u723d\u7684\u540d\u5b50<\/p>\n<p>\u5176\u5be6\u9019\u662f\u4e00\u4ef6\u5f88\u91cd\u8981\u7684\u4e8b\u60c5\uff0c\u6839\u64da clean code \u88e1\u9762\u6240\u63d0\u5230\u7684\uff0c\u4e00\u500b\u597d\u7684\u540d\u5b50\u53ef\u4ee5\u5e6b\u52a9\u4f60\u7406\u89e3\u7a0b\u5f0f\u78bc\u4e26 debug\uff0c\u901a\u5e38\u914d\u5408 thread \u89c0\u6e2c\u5de5\u5177\u5c31\u53ef\u4ee5\u627e\u51fa\u5230\u5e95\u6709\u591a\u5c11\u83ab\u540d\u5176\u5999\u7684 thread \u5728\u6d88\u8017\u4f60\u7684\u8cc7\u6e90\u3002<\/p>\n<p>\u4ee5 android ddms \u70ba\u4f8b<\/p>\n<pre><code class=\"hljs language-plaintext\">+----------------------+------------+---------+----------------------------------+\n| Thread ID &amp; Name     | Status     | utime   | Call Stack                       |\n+----------------------+------------+---------+----------------------------------+\n| #1  main             | Native     | 1250ms  | android.os.MessageQueue.native...|\n| #14 pool-1-thread-1  | TimedWait  | 340ms   | java.lang.Object.wait (OOM risk) |\n| #15 pool-1-thread-2  | Blocked    | 890ms   | okhttp3.internal.connection...   |\n| #16 pool-2-thread-1  | Running    | 1520ms  | android.graphics.BitmapFactory...|\n+----------------------+------------+---------+----------------------------------+<\/code><\/pre>\n<p><em>(\u9810\u8a2d\u672a\u547d\u540d\u7684 ThreadPool \u5728 DDMS\/Profiler \u4e2d\u5168\u90fd\u662f pool-N-thread-M\uff0c\u7121\u6cd5\u5224\u65b7\u6240\u5c6c\u696d\u52d9\u6a21\u7d44)<\/em><\/p>\n<p>\u770b\u5f97\u9019\u908a\u4f60\u53ef\u80fd\u6703\u89ba\u5f97\u9019\u7bc7\u5f88\u5ee2\uff0c\u4e0d\u904e\u662f\u66ff thread \u53d6\u500b\u540d\u5b50\uff0c\u539f\u751f\u5c31\u6709\u5566<\/p>\n<pre><code class=\"hljs language-java\"><span class=\"hljs-type\">Thread<\/span> <span class=\"hljs-variable\">thread<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">Thread<\/span>(Runnable);\nthread.setName(<span class=\"hljs-string\">&quot;Load bitmap task&quot;<\/span>);<\/code><\/pre>\n<p>\u4f46\u662f\uff5e\uff5e\uff5e<\/p>\n<p>\u5982\u679c\u662f\u4f7f\u7528 ExecutorService \u505a\u70ba thread \u6392\u7a0b\u5de5\u5177\u7684\u8a71\uff0c\u5c31\u6703\u767c\u73fe\u5c45\u7136\u6c92\u6709 setName() \u53ef\u4ee5\u7528\uff0c\u9019\u4e0d\u662f\u7576\u7136\u7684\u55ce\uff01\u5c31\u7b97\u53ef\u4ee5\u53d6\u540d\u5b50\u4e5f\u6703\u8b8a\u6210\u53d6 ExecutorService \u7684\u540d\u5b50\u5427\u3002\u800c\u9810\u8a2d\u5728 thread pool\u88e1\u7684 thread \u4e00\u5f8b\u662f\u9019\u683c\u5f0f\uff08\u5982\u4e0a\u5716\uff09<\/p>\n<pre><code class=\"hljs language-java\"><span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">namePrefix<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-string\">&quot;pool-&quot;<\/span> + poolNumber.getAndIncrement() + <span class=\"hljs-string\">&quot;-thread-&quot;<\/span> + thredNumber.getAndIncrement();<\/code><\/pre>\n<p>\u57fa\u672c\u4e0a\u9019\u547d\u540d\u6709\u8ddf\u6c92\u6709\u5dee\u4e0d\u591a\uff0c\u53ea\u4e0d\u904e\u591a\u77e5\u9053\u9019\u662f\u7531 pool \u5efa\u51fa\u4f86\u7684\uff0c\u70ba\u4e86\u89e3\u6c7a\u9019\u500b\u554f\u984c\uff0c\u5148\u63d0\u4f9b\u6700\u7c21\u55ae\u7684\u571f\u7832\u6cd5-\u76f4\u63a5\u5728runnable \u628a thread \u6293\u51fa\u4f86\u547d\u540d<\/p>\n<pre><code class=\"hljs language-java\"><span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">Runnable<\/span> () {\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-type\">void<\/span> <span class=\"hljs-title function_\">run<\/span><span class=\"hljs-params\">()<\/span> {\n        Thread.currentThread().setName(<span class=\"hljs-string\">&quot;Your name&quot;<\/span>);\n        doStuff();\n    }\n}<\/code><\/pre>\n<p>\u4f46\u662f\u9019\u771f\u7684\u592a\u571f\u7832\u4e86\uff0c\u5be6\u5728\u6c92\u6709\u7f8e\u611f\uff0c\u4e5f\u4ee3\u8868\u8005\u6709\u8dd1\u5230\u9019\u500b runnable \u7684 thread \u624d\u6709\u6a5f\u6703\u88ab\u547d\u540d\uff0c\u800c\u4e14\u5982\u679c\u4efb\u52d9\u4e0d\u540c\u7684\u8a71\uff0c\u4e00\u500bthread \u66f4\u6709\u53ef\u80fd\u6703\u5e38\u5e38\u8b8a\u63db\u540d\u7a31\u3002<\/p>\n<p>\u6700\u597d\u7684\u65b9\u6cd5\u662f\u5229\u7528\u5de5\u5ee0\u6a21\u5f0f\uff0c\u5728\u5275\u5efa thread pool \u6642\u628a\u5275\u9020 thread \u7684\u5de5\u5ee0\u65b9\u6cd5\u4e5f\u653e\u9032\u53bb<\/p>\n<pre><code class=\"hljs language-java\">ExecutorService mPool;\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-type\">ExecutorService<\/span> <span class=\"hljs-title function_\">getExecutorPool<\/span><span class=\"hljs-params\">()<\/span> {\n        <span class=\"hljs-keyword\">if<\/span> (mPool == <span class=\"hljs-literal\">null<\/span>) {\n            mPool = Executors.newFixedThreadPool(POOL_THREAD_NUM, <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">NameThreadFactory<\/span>(TAG));\n        }\n        <span class=\"hljs-keyword\">return<\/span> mPool;\n    }\n}\n<span class=\"hljs-comment\">\/\/ \u53e6\u5916\u5beb\u7684 thread factory, \u7c21\u55ae\u53ea\u591a\u52a0\u547d\u540d\u7684\u5de5\u4f5c<\/span>\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">NameThreadFactory<\/span> <span class=\"hljs-keyword\">implements<\/span> <span class=\"hljs-title class_\">ThreadFactory<\/span> {\n    <span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-keyword\">final<\/span> <span class=\"hljs-type\">AtomicInteger<\/span> <span class=\"hljs-variable\">poolNumber<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">AtomicInteger<\/span>(<span class=\"hljs-number\">1<\/span>);\n    <span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-keyword\">final<\/span> ThreadGroup group;\n    <span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-keyword\">final<\/span> <span class=\"hljs-type\">AtomicInteger<\/span> <span class=\"hljs-variable\">threadNumber<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">AtomicInteger<\/span>(<span class=\"hljs-number\">1<\/span>);\n    <span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-keyword\">final<\/span> String namePrefix;\n\n    <span class=\"hljs-type\">public<\/span> <span class=\"hljs-title function_\">NameThreadFactory<\/span><span class=\"hljs-params\">(String namePrefix)<\/span> {\n        <span class=\"hljs-type\">SecurityManager<\/span> <span class=\"hljs-variable\">s<\/span> <span class=\"hljs-operator\">=<\/span> System.getSecurityManager();\n        group = (s != <span class=\"hljs-literal\">null<\/span>) ? s.getThreadGroup() :\n                Thread.currentThread().getThreadGroup();\n        <span class=\"hljs-built_in\">this<\/span>.namePrefix = namePrefix + <span class=\"hljs-string\">&quot;-&quot;<\/span> +\n                poolNumber.getAndIncrement() +\n                <span class=\"hljs-string\">&quot;-thread-&quot;<\/span>;\n    }\n\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-type\">Thread<\/span> <span class=\"hljs-title function_\">newThread<\/span><span class=\"hljs-params\">(Runnable r)<\/span> {\n        <span class=\"hljs-type\">Thread<\/span> <span class=\"hljs-variable\">t<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">Thread<\/span>(group, r,\n                namePrefix + threadNumber.getAndIncrement(),\n                <span class=\"hljs-number\">0<\/span>);\n        <span class=\"hljs-keyword\">if<\/span> (t.isDaemon())\n            t.setDaemon(<span class=\"hljs-literal\">false<\/span>);\n        <span class=\"hljs-keyword\">if<\/span> (t.getPriority() != Thread.NORM_PRIORITY)\n            t.setPriority(Thread.NORM_PRIORITY);\n        <span class=\"hljs-keyword\">return<\/span> t;\n    }\n}<\/code><\/pre>\n<p>\u6ce8\u610f\uff1a\u6b64\u8655\u7684 lazy initialization \u4e26\u975e\u7dda\u7a0b\u5b89\u5168\u3002\u5728\u591a\u57f7\u884c\u7dd2\u4f75\u767c\u547c\u53eb getExecutorPool() \u6642\uff0c\u53ef\u80fd\u6703\u5efa\u7acb\u591a\u500b ThreadPool \u5be6\u4f8b\u3002\u6b63\u78ba\u505a\u6cd5\u662f\u4f7f\u7528 Double-checked Locking \u642d\u914d volatile\uff0c\u6216\u76f4\u63a5\u5728\u8b8a\u6578\u5ba3\u544a\u6642\u521d\u59cb\u5316\uff08eager initialization\uff09\u3002<\/p>\n<p>\u6216\u8005\u66f4\u7c21\u55ae\u7684\u4f7f\u7528\u5df2\u6709\u7684\u8eca\u8f2a guava , <a href=\"http:\/\/search.maven.org\/#artifactdetails%7Ccom.google.guava%7Cguava%7C18.0%7Cbundle\">google common lib<\/a><\/p>\n<p>\u5148\u5fc5\u9808\u5728 gradle \u52a0\u4e0a<\/p>\n<pre><code class=\"hljs language-groovy\">compile <span class=\"hljs-string\">&#x27;com.google.guava:guava:18.0&#x27;<\/span><\/code><\/pre>\n<p>\u63a5\u8005\uff5e<\/p>\n<pre><code class=\"hljs language-java\"><span class=\"hljs-type\">ThreadFactory<\/span> <span class=\"hljs-variable\">namedThreadFactory<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">ThreadFactoryBuilder<\/span>()\n                                       .setNameFormat(<span class=\"hljs-string\">&quot;workerthread-%d&quot;<\/span>).build()<\/code><\/pre>\n<p>\u4e5f\u6216\u8005 apache \u7684\u9019\u4e00\u5957 <a href=\"http:\/\/mvnrepository.com\/artifact\/org.apache.commons\/commons-lang3\/3.0\">lib<\/a> \uff0c\u8acb\u5148\u6293jar\u4e0b\u4f86<\/p>\n<pre><code class=\"hljs language-java\"><span class=\"hljs-type\">BasicThreadFactory<\/span> <span class=\"hljs-variable\">factory<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">BasicThreadFactory<\/span>.Builder()\n     .namingPattern(<span class=\"hljs-string\">&quot;workerthread-%d&quot;<\/span>)\n     .daemon(<span class=\"hljs-literal\">true<\/span>)\n     .build();<\/code><\/pre>\n<p>\u611f\u8b1d\u6536\u770b<\/p>\n<p>reference:<\/p>\n<p><a href=\"http:\/\/stackoverflow.com\/questions\/6113746\/naming-threads-and-thread-pools-of-executorservice\">http:\/\/stackoverflow.com\/questions\/6113746\/naming-threads-and-thread-pools-of-executorservice<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5982\u4f55\u66ff ExecutorService \u6240\u7ba1\u7406\u7684 thread \u8a2d\u5b9a\u4e00\u500b\u81ea\u5df1\u770b\u5f97\u723d\u7684\u540d\u5b50 \u5176\u5be6\u9019\u662f\u4e00\u4ef6\u5f88\u91cd\u8981\u7684 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[167],"tags":[219,265,300],"_links":{"self":[{"href":"https:\/\/boochlin.com\/index.php?rest_route=\/wp\/v2\/posts\/115"}],"collection":[{"href":"https:\/\/boochlin.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/boochlin.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/boochlin.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/boochlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=115"}],"version-history":[{"count":4,"href":"https:\/\/boochlin.com\/index.php?rest_route=\/wp\/v2\/posts\/115\/revisions"}],"predecessor-version":[{"id":1412,"href":"https:\/\/boochlin.com\/index.php?rest_route=\/wp\/v2\/posts\/115\/revisions\/1412"}],"wp:attachment":[{"href":"https:\/\/boochlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=115"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/boochlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=115"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/boochlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=115"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}