{"id":1031,"date":"2014-08-25T22:58:46","date_gmt":"2014-08-25T14:58:46","guid":{"rendered":"http:\/\/coderbee.net\/?p=1031"},"modified":"2014-08-26T22:24:01","modified_gmt":"2014-08-26T14:24:01","slug":"akka-typedactor","status":"publish","type":"post","link":"https:\/\/coderbee.net\/index.php\/akka\/20140825\/1031","title":{"rendered":"Akka TypedActor"},"content":{"rendered":"<p>Akka \u4e2d\u7684\u6709\u7c7b\u578b Actor \u662f Active Objects \u6a21\u5f0f\u7684\u4e00\u79cd\u5b9e\u73b0\uff0c\u5c06\u5f02\u6b65\u7684\u8c03\u7528\u6267\u884c\u903b\u8f91\u5c01\u88c5\u5728\u4e00\u4e2a\u65b9\u6cd5\u5185\uff0c\u5728\u4ee3\u7801\u5c42\u9762\u4fdd\u8bc1\u4e86\u7684\u987a\u5e8f\u6267\u884c\u601d\u7ef4\u3002<\/p>\n<h2>Active Objects \u8bbe\u8ba1\u6a21\u5f0f<\/h2>\n<p>\u6765\u81ea\u7ef4\u57fa\u767e\u79d1  <a href=\"http:\/\/en.wikipedia.org\/wiki\/Active_object\">Active Objects<\/a> \u3002<\/p>\n<p>\u8be5\u8bbe\u8ba1\u6a21\u5f0f\u5305\u542b\u4e86\u516d\u79cd\u5143\u7d20\uff1a<\/p>\n<ul>\n<li>\u4ee3\u7406\uff1a\u63d0\u4f9b\u4e86\u9762\u5411\u5ba2\u6237\u7aef\u7684\u5e26\u6709\u516c\u5f00\u65b9\u6cd5\u7684\u63a5\u53e3\u3002<\/li>\n<li>\u63a5\u53e3\uff1a\u5b9a\u4e49\u4e86\u5230 active object \u7684\u8bf7\u6c42\u65b9\u6cd5\uff08\u4e1a\u52a1\u4ee3\u7801\u63d0\u4f9b\uff09\u3002<\/li>\n<li>\u6765\u81ea\u5ba2\u6237\u7aef\u7684\u4e00\u5e8f\u5217\u7b49\u5f85\u8bf7\u6c42\u3002<\/li>\n<li>\u8c03\u5ea6\u5668\uff1a\u51b3\u5b9a\u63a5\u4e0b\u6765\u6267\u884c\u54ea\u4e2a\u8bf7\u6c42\u3002<\/li>\n<li>active object \u65b9\u6cd5\u7684\u5b9e\u73b0\u7c7b\uff08\u4e1a\u52a1\u4ee3\u7801\u63d0\u4f9b\uff09\u3002<\/li>\n<li>\u4e00\u4e2a\u56de\u8c03\u6216\u53d8\u91cf\uff0c\u7528\u4ee5\u8ba9\u5ba2\u6237\u7aef\u63a5\u6536\u7ed3\u679c\u3002<\/li>\n<\/ul>\n<p>\u4e0a\u8ff0\u516d\u4e2a\u5143\u7d20\u4e2d\uff0c\u9664\u4e86\u6807\u8bb0\uff08\u4e1a\u52a1\u4ee3\u7801\u63d0\u4f9b\uff09\u7684\uff0c\u5176\u4f59\u90fd\u662f\u7531\u8be5\u6a21\u5f0f\u7684\u5b9e\u73b0\u63d0\u4f9b\u7684\uff0c\u5728\u672c\u7bc7\u4e5f\u5c31\u662f Akka\u3002<\/p>\n<p>Akka \u662f\u901a\u8fc7 JDK \u7684 <a href=\"http:\/\/docs.oracle.com\/javase\/6\/docs\/api\/java\/lang\/reflect\/Proxy.html\">java.lang.reflect.Proxy<\/a> \u6765\u81ea\u5b9e\u73b0 active object \u6a21\u5f0f\u7684\u3002<\/p>\n<p><!--more--><\/p>\n<h2>\u4f7f\u7528 TypedActor<\/h2>\n<p>TypedActor \u5c06\u6d88\u606f\u4f20\u9012\u9690\u85cf\u5728\u65b9\u6cd5\u8c03\u7528\u5185\uff0c\u4f46\u5b83\u4e5f\u5fc5\u987b\u6ee1\u8db3 Actor \u987a\u5e8f\u5730\u3001\u72ec\u5360\u5730\u6267\u884c Actor \u4ee3\u7801\u903b\u8f91\u7684\u8981\u6c42\u3002<\/p>\n<p>\u6709\u7c7b\u578bActor\u76f8\u5bf9\u4e8e\u666e\u901aActor\u7684\u4f18\u52bf\u5728\u4e8e\u6709\u7c7b\u578bActor\u62e5\u6709\u9759\u6001\u7684\u5951\u7ea6\uff0c\u4f60\u4e0d\u9700\u8981\u5b9a\u4e49\u4f60\u81ea\u5df1\u7684\u6d88\u606f\uff0c\u5b83\u7684\u52a3\u52bf\u5728\u4e8e\u5bf9\u4f60\u80fd\u505a\u4ec0\u4e48\u548c\u4e0d\u80fd\u505a\u4ec0\u4e48\u8fdb\u884c\u4e86\u4e00\u4e9b\u9650\u5236\uff0ci.e. \u4f60\u4e0d\u80fd\u4f7f\u7528 become\/unbecome\u3002<\/p>\n<h3>1.   \u5b9a\u4e49\u4e1a\u52a1\u63a5\u53e3\u548c\u5b9e\u73b0<\/h3>\n<pre><code class=\"java\">trait Square {\n    \/\/ \u5468\u957f\n    def circumference: Long\n\n    \/\/ \u9762\u79ef\n    def area: Long\n}\n\nclass SquareImpl(val length: Long, val width: Long) extends Square {\n\n    def circumference = {\n        println(\"get circumference request\")\n        (length + width) * 2\n    }\n\n    def area = {\n        println(\"wait before area\")\n        Thread.sleep(2000)\n        length * width\n    }\n}\n<\/code><\/pre>\n<h3>2.   \u5c01\u88c5\u6210 active object \u975e\u5e38\u7b80\u5355<\/h3>\n<p><code>val square = TypedActor(system).typedActorOf(TypedProps(classOf[Square], new SquareImpl(10, 20)), \"name\")<\/code><\/p>\n<h3>3.   \u6d4b\u8bd5 TypedActor \u7684\u6267\u884c\u6548\u679c<\/h3>\n<pre><code class=\"java\">class SenderActor(val square: Square) extends Actor {\n    def receive = {\n        case \"area\" =&gt; println(square.area)\n        case \"circumference\" =&gt; println(square.circumference)\n    }\n}\n\nobject LearnTypedActor {\n    def main(vars: Array[String]) {\n        val system = ActorSystem(\"myActorSystem\")\n        val square = TypedActor(system).typedActorOf(TypedProps(classOf[Square], new SquareImpl(10, 20)), \"name\")\n\n        val actor1 = system.actorOf(Props(new SenderActor(square)), \"send1\")\n        actor1 ! \"area\"\n        println(\"message sent to actor 1\")\n\n        val actor2 = system.actorOf(Props(new SenderActor(square)), \"send2\")\n        actor2 ! \"circumference\"\n        println(\"message sent to actor 2\")\n    }\n}\n<\/code><\/pre>\n<p>\u8fd9\u91cc\u5b9a\u4e49\u4e86\u4e00\u4e2a SenderActor \u662f\u4e3a\u4e86\u5e76\u53d1\u5730\u8c03\u7528 TypedActor \u5b9e\u73b0\u7684\u65b9\u6cd5\u3002\u7531\u4e8e <code>area<\/code> \u65b9\u6cd5\u7684\u5b9e\u73b0\u91cc\u8fdb\u884c\u4e86\u7b49\u5f85\uff0c<code>circumference<\/code> \u6ca1\u6709\uff0c\u5982\u679c TypedActor \u4e0d\u662f\u987a\u5e8f\u5730\u5904\u7406\u6d88\u606f\uff0c\u90a3\u4e48 <code>circumference<\/code> \u5e94\u8be5\u6bd4  <code>area<\/code> \u5148\u6267\u884c\uff0c\u5426\u5219\u662f\u540e\u6267\u884c\u3002<\/p>\n<h3>4.   \u7ed3\u679c<\/h3>\n<pre><code>message sent to actor 1\nwait before area\nmessage sent to actor 2\n200\nget circumference request\n60\n<\/code><\/pre>\n<p>\u7ed3\u679c\u662f\u7b26\u5408\u9884\u671f\u7684\uff0c\u5148\u8c03\u7528\u7684 <code>area<\/code> \u65b9\u6cd5\u867d\u7136\u8fdb\u884c\u4e86\u7b49\u5f85\uff0c\u4f46\u540e\u8c03\u7528\u7684 <code>circumference<\/code> \u8fd8\u662f\u5f97\u7b49  <code>area<\/code> \u65b9\u6cd5\u6267\u884c\u5b8c\u540e\u624d\u80fd\u6267\u884c\u3002<\/p>\n<h2>TypedActor \u7684\u4f18\u52bf<\/h2>\n<p>\u5982\u679c\u6211\u4eec\u901a\u8fc7\u6d88\u606f\u4f20\u9012\u7684\u65b9\u5f0f\u6765\u8c03\u7528\uff0c\u5c31\u9700\u8981\u7f16\u5199\u4ee3\u7801\u7684\u4eba\u5177\u6709\u5f02\u6b65\u7684\u601d\u7ef4\uff0c\u5f02\u6b65\u5730\u601d\u8003\uff0c\u800c\u4eba\u7684\u601d\u7ef4\u6a21\u5f0f\u90fd\u662f\u987a\u5e8f\u5730\u601d\u8003\u7684\uff0c\u8fd9\u5c31\u9700\u8981\u5f88\u5927\u7684\u8f6c\u53d8\u3002<\/p>\n<p>TypedActor \u4fdd\u6301\u4e86\u6d88\u606f\u4f20\u9012\u7684\u4f18\u70b9\uff0c\u4e14 Akka \u6846\u67b6\u5c4f\u853d\u4e86\u5f02\u6b65\u6027\uff0c\u5141\u8bb8\u7a0b\u5e8f\u5458\u7ee7\u7eed\u7528\u987a\u5e8f\u7684\u601d\u7ef4\u601d\u8003\u95ee\u9898\u3002<\/p>\n<p>\u53e6\u4e00\u4e2a\u4f18\u52bf\u5c31\u662f\u5b83\u662f\u6709\u7c7b\u578b\u7684\uff0c\u7531\u4e8e\u6d88\u606f\u4f20\u9012\u88ab\u5c01\u88c5\u5728\u65b9\u6cd5\u8c03\u7528\u5185\uff0c\u6240\u4ee5\u4f20\u9012\u7684\u6d88\u606f\u90fd\u6709\u4e86\u7c7b\u578b\u5b89\u5168\u7684\u4fdd\u969c\uff0c\u76f4\u63a5\u4f7f\u7528 Actor\uff0c\u53ef\u80fd\u4f1a\u6536\u5230\u4efb\u610f\u7c7b\u578b\u7684\u6d88\u606f\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>Akka \u4e2d\u7684\u6709\u7c7b\u578b Actor \u662f Active Objects \u6a21\u5f0f\u7684\u4e00\u79cd\u5b9e &hellip; <a href=\"https:\/\/coderbee.net\/index.php\/akka\/20140825\/1031\">\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":[183],"tags":[191,175,235,190],"_links":{"self":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/1031"}],"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=1031"}],"version-history":[{"count":3,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/1031\/revisions"}],"predecessor-version":[{"id":1034,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/1031\/revisions\/1034"}],"wp:attachment":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/media?parent=1031"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/categories?post=1031"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/tags?post=1031"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}