{"id":477,"date":"2004-02-26T23:53:47","date_gmt":"2004-02-26T14:53:47","guid":{"rendered":"\/?p=477"},"modified":"2004-02-26T23:53:47","modified_gmt":"2004-02-26T14:53:47","slug":"lock-file","status":"publish","type":"post","link":"https:\/\/www.hiro345.net\/blogs\/hiro345\/archives\/477.html","title":{"rendered":"Lock File"},"content":{"rendered":"

Servlet\/JSP\u3067\u30ed\u30c3\u30af\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3059\u308b\u306b\u306f\u3069\u3046\u3059\u308b\u3093\u3060\u308d\u3046\u3068\u601d\u3063\u3066\u3061\u3087\u3063\u3068\u8abf\u3079\u3066\u307f\u305f\u3002<\/p>\n

\u30c6\u30ad\u30b9\u30c8\u30d5\u30a1\u30a4\u30eb\u3078\u306e\u540c\u6642\u66f8\u304d\u8fbc\u307f\u3092\u9632\u3050<\/a>\u3068\u3044\u3046\u624b\u3082\u3042\u308b\u3088\u3046\u3060\u304c\u300110\u5206\u4ee5\u4e0a\u305f\u3063\u305f\u30ed\u30c3\u30af\u30d5\u30a1\u30a4\u30eb\u3092\u5f37\u5236\u7684\u306b\u524a\u9664\u3057\u305f\u308a\u3001delete()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u3044\u308b\u3042\u305f\u308a\u304c\u3061\u3087\u3063\u3068\u3042\u3084\u3057\u3044\u3002\u30ed\u30c3\u30af\u30d5\u30a1\u30a4\u30eb\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u5b9f\u88c5\u306b\u306fJava2 SDK \u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3067\u306fFile.createNewFile()\u3068File.deleteOnExit()\u3068\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3068\u3044\u3046\u3088\u3046\u306a\u8a18\u8ff0\u304c\u3042\u308b\u306e\u3067\u3001\u305d\u3046\u3057\u305f\u65b9\u304c\u3044\u3044\u3060\u308d\u3046\u3002\u3057\u304b\u3057\u3001File.deleteOnExit()\u306fVM\u304c\u7d42\u4e86\u3059\u308b\u3068\u304d\u306b\u3057\u304b\u30d5\u30a1\u30a4\u30eb\u3092\u524a\u9664\u3057\u306a\u3044\u306e\u3067Servlet\/JSP\u3067\u306f\u4f7f\u3048\u306a\u3044\u3002<\/p>\n

\u3082\u3046\u3061\u3087\u3063\u3068\u8abf\u3079\u3066\u307f\u305f\u3068\u3053\u308d\u3001java.nio.channels.FileChannel.lock() \u3092\u4f7f\u3046\u306e\u304c\u826f\u3055\u305d\u3046\u3060\u3002\u3057\u304b\u3057\u3053\u308c\u3082\u300c\u30d5\u30a1\u30a4\u30eb\u30ed\u30c3\u30af\u306f Java \u4eee\u60f3\u30de\u30b7\u30f3\u5168\u4f53\u306e\u305f\u3081\u306b\u4fdd\u6301\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u3089\u306f\u3001\u540c\u4e00\u4eee\u60f3\u30de\u30b7\u30f3\u5185\u306e\u8907\u6570\u30b9\u30ec\u30c3\u30c9\u306b\u3088\u308b\u30d5\u30a1\u30a4\u30eb\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3092\u5236\u5fa1\u3059\u308b\u306b\u306f\u9069\u3057\u3066\u3044\u307e\u305b\u3093\u3002\u300d\u306a\u3093\u3066\u66f8\u304b\u308c\u3066\u3044\u308b\u3002\u3082\u3063\u3068\u8a00\u3048\u3070\u3001\u300c\u4ed6\u306e\u8a00\u8a9e\u3067\u66f8\u304b\u308c\u305f\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u52d5\u4f5c\u3059\u308b\u30d7\u30ed\u30bb\u30b9\u306e\u305f\u3081\u306b\u3082\u4fdd\u6301\u3055\u308c\u308b\u300d\u306e\u3060\u308d\u3046\u3002\u3061\u3087\u3063\u3068\u5f37\u529b\u3059\u304e\u308b\u611f\u3058\u3060\u3002<\/p>\n

\u7d50\u5c40\u306e\u3068\u3053\u308d\u3001\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u5bfe\u5fdc\u306eSingleton\u3092\u7528\u610f\u3057\u3066\u3001\u305d\u3044\u3064\u306b\u30ad\u30fc\u3068\u3057\u3066\u30d5\u30a1\u30a4\u30eb\u540d\u3092\u6e21\u3059\u3068\u30ed\u30c3\u30af\u7528\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u8fd4\u3059\u3088\u3046\u306a\u30e1\u30bd\u30c3\u30c9\u3092\u6301\u305f\u305b\u3066\u3001synchronized\u3067\u6392\u4ed6\u5236\u5fa1\u3059\u308b\u306e\u304c\u826f\u3044\u306e\u3067\u306f\u3001\u3068\u3044\u3046\u7d50\u8ad6\u306b\u9054\u3057\u305f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

Servlet\/JSP\u3067\u30ed\u30c3\u30af\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3059\u308b\u306b\u306f\u3069\u3046\u3059\u308b\u3093\u3060\u308d\u3046\u3068\u601d\u3063\u3066\u3061\u3087\u3063\u3068\u8abf\u3079\u3066\u307f\u305f\u3002 \u30c6\u30ad\u30b9\u30c8\u30d5\u30a1\u30a4\u30eb\u3078\u306e\u540c\u6642\u66f8\u304d\u8fbc\u307f\u3092\u9632\u3050\u3068\u3044\u3046\u624b\u3082\u3042\u308b\u3088\u3046\u3060\u304c\u300110\u5206\u4ee5\u4e0a\u305f\u3063\u305f\u30ed\u30c3\u30af\u30d5\u30a1\u30a4\u30eb\u3092\u5f37\u5236\u7684\u306b\u524a\u9664\u3057\u305f\u308a\u3001dele … \u7d9a\u304d\u3092\u8aad\u3080 →<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-477","post","type-post","status-publish","format-standard","hentry","category-java"],"_links":{"self":[{"href":"https:\/\/www.hiro345.net\/blogs\/hiro345\/wp-json\/wp\/v2\/posts\/477","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hiro345.net\/blogs\/hiro345\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.hiro345.net\/blogs\/hiro345\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.hiro345.net\/blogs\/hiro345\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hiro345.net\/blogs\/hiro345\/wp-json\/wp\/v2\/comments?post=477"}],"version-history":[{"count":0,"href":"https:\/\/www.hiro345.net\/blogs\/hiro345\/wp-json\/wp\/v2\/posts\/477\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.hiro345.net\/blogs\/hiro345\/wp-json\/wp\/v2\/media?parent=477"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.hiro345.net\/blogs\/hiro345\/wp-json\/wp\/v2\/categories?post=477"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.hiro345.net\/blogs\/hiro345\/wp-json\/wp\/v2\/tags?post=477"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}