{"id":637,"date":"2023-05-04T03:25:43","date_gmt":"2023-02-03T16:57:01","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/index.php\/2023\/11\/30\/%e3%83%97%e3%83%ad%e3%82%ad%e3%82%b7%e8%a8%ad%e8%a8%88%e3%83%91%e3%82%bf%e3%83%bc%e3%83%b3\/"},"modified":"2025-08-01T01:16:45","modified_gmt":"2025-07-31T16:16:45","slug":"%e3%83%97%e3%83%ad%e3%82%ad%e3%82%b7%e8%a8%ad%e8%a8%88%e3%83%91%e3%82%bf%e3%83%bc%e3%83%b3","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/%e3%83%97%e3%83%ad%e3%82%ad%e3%82%b7%e8%a8%ad%e8%a8%88%e3%83%91%e3%82%bf%e3%83%bc%e3%83%b3\/","title":{"rendered":"\u30d7\u30ed\u30ad\u30b7\u8a2d\u8a08\u30d1\u30bf\u30fc\u30f3"},"content":{"rendered":"<p>\u30d7\u30ed\u30ad\u30b7\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u306f\u3001\u69cb\u9020\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u306e\u4e00\u3064\u3067\u3042\u308a\u3001\u79c1\u306e\u610f\u898b\u3067\u306f\u7406\u89e3\u3057\u3084\u3059\u3044\u30d1\u30bf\u30fc\u30f3\u306e\u4e00\u3064\u3067\u3059\u3002<\/p>\n<h2>\u30d7\u30ed\u30ad\u30b7\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3<\/h2>\n<p>GoF\u306b\u3088\u308bProxy\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u306e\u610f\u56f3\u306f\u3001\u4ed6\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4ee3\u7406\u307e\u305f\u306f\u30d7\u30ec\u30fc\u30b9\u30db\u30eb\u30c0\u3092\u63d0\u4f9b\u3057\u3001\u30a2\u30af\u30bb\u30b9\u3092\u5236\u5fa1\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u305d\u306e\u5b9a\u7fa9\u81ea\u4f53\u306f\u975e\u5e38\u306b\u660e\u78ba\u3067\u3042\u308a\u3001Proxy\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u306f\u6a5f\u80fd\u306e\u5236\u5fa1\u3055\u308c\u305f\u30a2\u30af\u30bb\u30b9\u3092\u63d0\u4f9b\u3057\u305f\u3044\u5834\u5408\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u30b7\u30b9\u30c6\u30e0\u4e0a\u3067\u3044\u304f\u3064\u304b\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3067\u304d\u308b\u30af\u30e9\u30b9\u304c\u3042\u308b\u3068\u3057\u307e\u3059\u3002\u3053\u308c\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u554f\u984c\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u3053\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u63d0\u4f9b\u3057\u305f\u3044\u5834\u5408\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u30b7\u30b9\u30c6\u30e0\u30d5\u30a1\u30a4\u30eb\u3092\u524a\u9664\u3057\u305f\u308a\u8a2d\u5b9a\u3092\u5909\u66f4\u3057\u305f\u308a\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u3001\u6df1\u523b\u306a\u554f\u984c\u304c\u767a\u751f\u3059\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002\u3053\u3053\u3067\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u5236\u5fa1\u3055\u308c\u305f\u30a2\u30af\u30bb\u30b9\u3092\u63d0\u4f9b\u3059\u308b\u305f\u3081\u306bProxy\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3>\u30d7\u30ed\u30ad\u30b7\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3 &#8211; \u30e1\u30a4\u30f3\u30af\u30e9\u30b9<\/h3>\n<p>\u79c1\u305f\u3061\u306fJava\u3092\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u89b3\u70b9\u3067\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3057\u3066\u3044\u308b\u306e\u3067\u3001\u3053\u3053\u306b\u79c1\u305f\u3061\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3068\u305d\u306e\u5b9f\u88c5\u30af\u30e9\u30b9\u304c\u3042\u308a\u307e\u3059\u3002CommandExecutor.java<\/p>\n<pre class=\"post-pre\"><code>package com.scdev.design.proxy;\r\n\r\npublic interface CommandExecutor {\r\n\r\n\tpublic void runCommand(String cmd) throws Exception;\r\n}\r\n<\/code><\/pre>\n<p>CommandExecutorImpl.java\u3092\u65e5\u672c\u8a9e\u3067\u5b8c\u5168\u306b\u8a00\u3044\u63db\u3048\u308b\u3002\u30aa\u30d7\u30b7\u30e7\u30f3\u306f1\u3064\u3060\u3051\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>package com.scdev.design.proxy;\r\n\r\nimport java.io.IOException;\r\n\r\npublic class CommandExecutorImpl implements CommandExecutor {\r\n\r\n\t@Override\r\n\tpublic void runCommand(String cmd) throws IOException {\r\n                \/\/some heavy implementation\r\n\t\tRuntime.getRuntime().exec(cmd);\r\n\t\tSystem.out.println(\"'\" + cmd + \"' command executed.\");\r\n\t}\r\n\r\n}\r\n<\/code><\/pre>\n<h3>\u30d7\u30ed\u30ad\u30b7\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3 &#8211; \u30d7\u30ed\u30ad\u30b7\u30af\u30e9\u30b9<\/h3>\n<p>\u305f\u3060\u3057\u3001\u4e0a\u8a18\u306e\u30af\u30e9\u30b9\u306b\u5bfe\u3057\u3066\u30d5\u30eb\u30a2\u30af\u30bb\u30b9\u6a29\u9650\u3092\u6301\u3064\u306e\u306f\u7ba1\u7406\u8005\u30e6\u30fc\u30b6\u30fc\u306e\u307f\u3068\u3057\u307e\u3059\u3002\u7ba1\u7406\u8005\u3067\u306a\u3044\u5834\u5408\u306f\u5236\u9650\u3055\u308c\u305f\u30b3\u30de\u30f3\u30c9\u306e\u307f\u304c\u8a31\u53ef\u3055\u308c\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u3001\u79c1\u305f\u3061\u306e\u975e\u5e38\u306b\u30b7\u30f3\u30d7\u30eb\u306a\u30d7\u30ed\u30ad\u30b7\u30af\u30e9\u30b9\u306e\u5b9f\u88c5\u3092\u793a\u3057\u307e\u3059\u3002CommandExecutorProxy.java<\/p>\n<pre class=\"post-pre\"><code>package com.scdev.design.proxy;\r\n\r\npublic class CommandExecutorProxy implements CommandExecutor {\r\n\r\n\tprivate boolean isAdmin;\r\n\tprivate CommandExecutor executor;\r\n\t\r\n\tpublic CommandExecutorProxy(String user, String pwd){\r\n\t\tif(\"Pankaj\".equals(user) &amp;&amp; \"J@urnalD$v\".equals(pwd)) isAdmin=true;\r\n\t\texecutor = new CommandExecutorImpl();\r\n\t}\r\n\t\r\n\t@Override\r\n\tpublic void runCommand(String cmd) throws Exception {\r\n\t\tif(isAdmin){\r\n\t\t\texecutor.runCommand(cmd);\r\n\t\t}else{\r\n\t\t\tif(cmd.trim().startsWith(\"rm\")){\r\n\t\t\t\tthrow new Exception(\"rm command is not allowed for non-admin users.\");\r\n\t\t\t}else{\r\n\t\t\t\texecutor.runCommand(cmd);\r\n\t\t\t}\r\n\t\t}\r\n\t}\r\n\r\n}\r\n<\/code><\/pre>\n<h3>\u30d7\u30ed\u30ad\u30b7\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u306e\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u30d7\u30ed\u30b0\u30e9\u30e0<\/h3>\n<p>Proxy\u30d1\u30bf\u30fc\u30f3\u306e\u30c6\u30b9\u30c8\u3092\u884c\u3046ProxyPatternTest.java<\/p>\n<pre class=\"post-pre\"><code>package com.scdev.design.test;\r\n\r\nimport com.scdev.design.proxy.CommandExecutor;\r\nimport com.scdev.design.proxy.CommandExecutorProxy;\r\n\r\npublic class ProxyPatternTest {\r\n\r\n\tpublic static void main(String[] args){\r\n\t\tCommandExecutor executor = new CommandExecutorProxy(\"Pankaj\", \"wrong_pwd\");\r\n\t\ttry {\r\n\t\t\texecutor.runCommand(\"ls -ltr\");\r\n\t\t\texecutor.runCommand(\" rm -rf abc.pdf\");\r\n\t\t} catch (Exception e) {\r\n\t\t\tSystem.out.println(\"Exception Message::\"+e.getMessage());\r\n\t\t}\r\n\t\t\r\n\t}\r\n\r\n}\r\n<\/code><\/pre>\n<p>\u4e0a\u8a18\u306e\u30d7\u30ed\u30ad\u30b7\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u306e\u4f8b\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u51fa\u529b\u306f\u6b21\u306e\u901a\u308a\u3067\u3059\uff1a<\/p>\n<pre class=\"post-pre\"><code>'ls -ltr' command executed.\r\nException Message::rm command is not allowed for non-admin users.\r\n<\/code><\/pre>\n<p>\u30d7\u30ed\u30ad\u30b7\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u306e\u4e00\u822c\u7684\u306a\u4f7f\u7528\u6cd5\u306f\u3001\u30a2\u30af\u30bb\u30b9\u5236\u5fa1\u3084\u3088\u308a\u826f\u3044\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u305f\u3081\u306b\u30e9\u30c3\u30d1\u30fc\u306e\u5b9f\u88c5\u3092\u63d0\u4f9b\u3059\u308b\u3053\u3068\u3067\u3059\u3002Java\u306eRMI\u30d1\u30c3\u30b1\u30fc\u30b8\u306f\u30d7\u30ed\u30ad\u30b7\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\u3002\u4ee5\u4e0a\u304cJava\u306b\u304a\u3051\u308b\u30d7\u30ed\u30ad\u30b7\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u306b\u95a2\u3059\u308b\u8aac\u660e\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u30d7\u30ed\u30ad\u30b7\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u306f\u3001\u69cb\u9020\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u306e\u4e00\u3064\u3067\u3042\u308a\u3001\u79c1\u306e\u610f\u898b\u3067\u306f\u7406\u89e3\u3057\u3084\u3059\u3044\u30d1\u30bf\u30fc\u30f3\u306e\u4e00\u3064\u3067\u3059\u3002 \u30d7\u30ed\u30ad\u30b7\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3 GoF\u306b\u3088\u308bProxy\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u306e\u610f\u56f3\u306f\u3001\u4ed6\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4ee3\u7406\u307e\u305f\u306f\u30d7\u30ec\u30fc\u30b9\u30db [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[26,61],"class_list":["post-637","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-26","tag-61"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u30d7\u30ed\u30ad\u30b7\u8a2d\u8a08\u30d1\u30bf\u30fc\u30f3 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" 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