{"id":30057,"date":"2024-03-18T23:18:25","date_gmt":"2024-03-18T14:18:25","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%aedelayqueue%e3%81%ae%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95%e3%81%af%ef%bc%9f\/"},"modified":"2024-03-22T22:27:47","modified_gmt":"2024-03-22T13:27:47","slug":"java%e3%81%aedelayqueue%e3%81%ae%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95%e3%81%af%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%aedelayqueue%e3%81%ae%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95%e3%81%af%ef%bc%9f\/","title":{"rendered":"Java\u306eDelayQueue\u306e\u4f7f\u7528\u65b9\u6cd5\u306f\uff1f"},"content":{"rendered":"

DelayQueue\u306fJava\u3067\u4f7f\u308f\u308c\u308b\u7121\u9650\u306e\u30d6\u30ed\u30c3\u30ad\u30f3\u30b0\u30ad\u30e5\u30fc\u3067\u3001Delayed\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3057\u3066\u304a\u308a\u3001\u8981\u7d20\u306f\u6307\u5b9a\u3055\u308c\u305f\u6642\u9593\u306e\u9045\u308c\u5f8c\u306b\u53d6\u308a\u51fa\u3055\u308c\u307e\u3059\u3002DelayQueue\u3092\u4f7f\u3046\u624b\u9806\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a<\/p>\n

    \n
  1. DelayQueue\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/li>\n
  2. \u9045\u5ef6\u30ad\u30e5\u30fc\uff08DelayQueue\uff09\u306b\u306f\u3001DelayedElement\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u683c\u7d0d\u3059\u308b\u9045\u5ef6\u30ad\u30e5\u30fc\u5909\u6570delayQueue\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n
  3. Delayed\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3059\u308bDelayedElement\u8981\u7d20\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/li>\n
  4. public class DelayedElement implements Delayed {
    \nprivate long delayTime; \/\/ \u5ef6\u8fdf\u6642\u9593
    \nprivate long expireTime; \/\/ \u5230\u671f\u6642\u9593
    \nprivate String data; \/\/ \u30c7\u30fc\u30bf\/\/ \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf
    \npublic DelayedElement(long delayTime, String data) {
    \nthis.delayTime = delayTime;
    \nthis.expireTime = System.currentTimeMillis() + delayTime;
    \nthis.data = data;
    \n}<\/p>\n

    \/\/ \u6b8b\u308a\u306e\u9045\u5ef6\u6642\u9593\u3092\u53d6\u5f97
    \n@Override
    \npublic long getDelay(TimeUnit unit) {
    \nreturn unit.convert(expireTime – System.currentTimeMillis(), TimeUnit.MILLISECONDS);
    \n}<\/p>\n

    \/\/ \u30ad\u30e5\u30fc\u8981\u7d20\u306e\u30bd\u30fc\u30c8\u898f\u5247
    \n@Override
    \npublic int compareTo(Delayed o) {
    \nif (this.expireTime < ((DelayedElement) o).expireTime) { return -1; } else if (this.expireTime > ((DelayedElement) o).expireTime) {
    \nreturn 1;
    \n} else {
    \nreturn 0;
    \n}
    \n}<\/p>\n

    \/\/ \u8981\u7d20\u304c\u671f\u9650\u5207\u308c\u304b\u3069\u3046\u304b
    \npublic boolean isExpired() {
    \nreturn System.currentTimeMillis() >= expireTime;
    \n}<\/p>\n

    \/\/ \u30c7\u30fc\u30bf\u3092\u53d6\u5f97
    \npublic String getData() {
    \nreturn data;
    \n}
    \n}<\/li>\n

  5. DelayQueue\u306b\u8981\u7d20\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/li>\n
  6. delayQueue.offer(new DelayedElement(1000, “\u8981\u7d20 1”)); \/\/ 1\u79d2\u306e\u9045\u5ef6
    \ndelayQueue.offer(new DelayedElement(2000, “\u8981\u7d20 2”)); \/\/ 2\u79d2\u306e\u9045\u5ef6
    \n…<\/li>\n
  7. DelayQueue\u304b\u3089\u671f\u9650\u5207\u308c\u306e\u8981\u7d20\u3092\u53d6\u308a\u51fa\u3059\uff1a<\/li>\n
  8. delayQueue\u304b\u3089\u8981\u7d20\u3092\u53d6\u308a\u51fa\u3057\u3066\u3001DelayedElement delayedElement\u306b\u4ee3\u5165\u3057\u3001\u305d\u306e\u30c7\u30fc\u30bf\u3092String\u578b\u306e\u5909\u6570data\u306b\u4ee3\u5165\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n

    \u91cd\u8981\u306a\u3053\u3068\u306f\u3001take()\u30e1\u30bd\u30c3\u30c9\u306f\u30d6\u30ed\u30c3\u30ad\u30f3\u30b0\u30e1\u30bd\u30c3\u30c9\u3067\u3042\u308a\u3001\u30ad\u30e5\u30fc\u306b\u8981\u7d20\u304c\u306a\u3044\u5834\u5408\u306f\u8981\u7d20\u304c\u5230\u7740\u3059\u308b\u307e\u3067\u5e38\u306b\u30d6\u30ed\u30c3\u30af\u3055\u308c\u307e\u3059\u3002\u30d6\u30ed\u30c3\u30af\u3092\u305b\u305a\u306b\u671f\u9650\u5207\u308c\u306e\u8981\u7d20\u3092\u53d6\u5f97\u3057\u305f\u3044\u5834\u5408\u306f\u3001poll()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n

    DelayedElement\u30af\u30e9\u30b9\u306ecompareTo\uff08\uff09\u30e1\u30bd\u30c3\u30c9\u3092\u66f8\u304d\u76f4\u3059\u3053\u3068\u3067\u3001\u8981\u7d20\u306e\u4e26\u3079\u66ff\u3048\u30eb\u30fc\u30eb\u3092\u6307\u5b9a\u3057\u3001\u3069\u306e\u8981\u7d20\u304c\u5148\u306b\u53d6\u308a\u51fa\u3055\u308c\u308b\u304b\u3092\u6c7a\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u524d\u8ff0\u306e\u4f8b\u3067\u306f\u3001\u8981\u7d20\u306e\u4e26\u3079\u66ff\u3048\u30eb\u30fc\u30eb\u306f\u6709\u52b9\u671f\u9650\u306e\u9806\u756a\u306b\u5f93\u3063\u3066\u4e26\u3079\u66ff\u3048\u3089\u308c\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

    DelayQueue\u306fJava\u3067\u4f7f\u308f\u308c\u308b\u7121\u9650\u306e\u30d6\u30ed\u30c3\u30ad\u30f3\u30b0\u30ad\u30e5\u30fc\u3067\u3001Delayed\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3057\u3066\u304a\u308a\u3001\u8981\u7d20\u306f\u6307\u5b9a\u3055\u308c\u305f\u6642\u9593\u306e\u9045\u308c\u5f8c\u306b\u53d6\u308a\u51fa\u3055\u308c\u307e\u3059\u3002DelayQueue\u3092\u4f7f\u3046\u624b\u9806\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a Delay […]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-30057","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nJava\u306eDelayQueue\u306e\u4f7f\u7528\u65b9\u6cd5\u306f\uff1f - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/ja\/blog\/java\u306edelayqueue\u306e\u4f7f\u7528\u65b9\u6cd5\u306f\uff1f\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Java\u306eDelayQueue\u306e\u4f7f\u7528\u65b9\u6cd5\u306f\uff1f\" \/>\n<meta property=\"og:description\" content=\"DelayQueue\u306fJava\u3067\u4f7f\u308f\u308c\u308b\u7121\u9650\u306e\u30d6\u30ed\u30c3\u30ad\u30f3\u30b0\u30ad\u30e5\u30fc\u3067\u3001Delayed\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3057\u3066\u304a\u308a\u3001\u8981\u7d20\u306f\u6307\u5b9a\u3055\u308c\u305f\u6642\u9593\u306e\u9045\u308c\u5f8c\u306b\u53d6\u308a\u51fa\u3055\u308c\u307e\u3059\u3002DelayQueue\u3092\u4f7f\u3046\u624b\u9806\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a Delay […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/java\u306edelayqueue\u306e\u4f7f\u7528\u65b9\u6cd5\u306f\uff1f\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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