{"id":117789,"date":"2024-03-23T11:50:07","date_gmt":"2024-03-23T02:50:07","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/%e9%ab%98%e4%b8%a6%e8%a1%8c%e3%83%87%e3%83%bc%e3%82%bf%e3%83%99%e3%83%bc%e3%82%b9%e3%82%a2%e3%82%af%e3%82%bb%e3%82%b9-go%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8bgo-waitgroup%e6%89%8b%e6%b3%95\/"},"modified":"2024-03-27T20:34:40","modified_gmt":"2024-03-27T11:34:40","slug":"%e9%ab%98%e4%b8%a6%e8%a1%8c%e3%83%87%e3%83%bc%e3%82%bf%e3%83%99%e3%83%bc%e3%82%b9%e3%82%a2%e3%82%af%e3%82%bb%e3%82%b9-go%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8bgo-waitgroup%e6%89%8b%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/%e9%ab%98%e4%b8%a6%e8%a1%8c%e3%83%87%e3%83%bc%e3%82%bf%e3%83%99%e3%83%bc%e3%82%b9%e3%82%a2%e3%82%af%e3%82%bb%e3%82%b9-go%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8bgo-waitgroup%e6%89%8b%e6%b3%95\/","title":{"rendered":"\u9ad8\u4e26\u884c\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30a2\u30af\u30bb\u30b9: Go\u306b\u304a\u3051\u308bGo WaitGroup\u624b\u6cd5"},"content":{"rendered":"<p>WaitGroup \u306f\u3001Go\u8a00\u8a9e\u306b\u304a\u3044\u3066\u3001\u4e00\u9023\u306eGoroutine\u304c\u5b9f\u884c\u3092\u7d42\u3048\u308b\u306e\u3092\u5f85\u3064\u305f\u3081\u306e\u4ed5\u7d44\u307f\u3067\u3059\u3002\u9ad8\u4e26\u884c\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30a2\u30af\u30bb\u30b9\u3067\u306f\u3001\u3059\u3079\u3066\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u64cd\u4f5c\u304c\u5b8c\u4e86\u3057\u305f\u5f8c\u306b\u5f8c\u7d9a\u51e6\u7406\u3092\u5b9f\u884c\u3059\u308b\u305f\u3081\u306bWaitGroup\u3092\u4f7f\u7528\u3057\u3066\u3001\u4e26\u884c\u64cd\u4f5c\u306e\u6b63\u78ba\u6027\u3092\u78ba\u4fdd\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>WaitGroup\u306e\u4f7f\u7528\u306f\u3001\u6b21\u306e3\u6bb5\u968e\u3067\u69cb\u6210\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<ol>\n<li>WaitGroup\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3059\u308b\uff1async package\u5185\u306eWaitGroup\u578b\u3092\u4f7f\u7528\u3057\u3066WaitGroup\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">var<\/span> wg sync.WaitGroup\r\n<\/code><\/pre>\n<ol>\n<li>WaitGroup \u306e\u30ab\u30a6\u30f3\u30bf\u306b Add \u30e1\u30bd\u30c3\u30c9\u3067\u5f85\u6a5f\u3059\u308b goroutine \u6570\u5206\u3060\u3051\u52a0\u7b97\u3057\u3001\u5f85\u6a5f\u3059\u308b goroutine \u306e\u305d\u308c\u305e\u308c\u306e\u624b\u524d\u3067\u5b9f\u884c\u3059\u308b\u3002<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code>wg.Add(<span class=\"hljs-number\">1<\/span>)\r\n<\/code><\/pre>\n<ol>\n<li>\u5404\u30b4\u30eb\u30fc\u30c1\u30f3\u304c\u5b8c\u4e86\u3057\u305f\u3089\u30ab\u30a6\u30f3\u30bf\u3092\u6e1b\u3089\u3059: \u5404\u30b4\u30eb\u30fc\u30c1\u30f3\u306e\u5b9f\u884c\u304c\u5b8c\u4e86\u3057\u305f\u3089\u3001Done\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066WaitGroup\u30ab\u30a6\u30f3\u30bf\u3092\u6e1b\u3089\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code>wg.Done()\r\n<\/code><\/pre>\n<ol>\n<li>\u5168\u3066\u306egoroutine\u306e\u5b9f\u884c\u5b8c\u4e86\u3092\u5f85\u3064\uff1aWait\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001\u5168\u3066\u306egoroutine\u304c\u5b9f\u884c\u3092\u5b8c\u4e86\u3059\u308b\u306e\u3092\u5f85\u3061\u307e\u3059\u3002Wait\u30e1\u30bd\u30c3\u30c9\u306f\u547c\u3073\u51fa\u3057\u5143\u306egoroutine\u3092\u30d6\u30ed\u30c3\u30af\u3057\u3001\u30ab\u30a6\u30f3\u30bf\u304c0\u306b\u306a\u308b\u307e\u3067\u5f85\u3061\u307e\u3059\u3002<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code>wg.Wait()\r\n<\/code><\/pre>\n<p>\u9ad8\u4e26\u884c\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9 \u30a2\u30af\u30bb\u30b9\u306e\u5b9f\u88c5\u3067 WaitGroup \u3092\u4f7f\u7528\u3059\u308b\u30b3\u30fc\u30c9\u306e\u4f8b\u3092\u4ee5\u4e0b\u306b\u793a\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">package<\/span> main\r\n<span class=\"hljs-keyword\">import<\/span> (\r\n<span class=\"hljs-string\">\"database\/sql\"<\/span>\r\n<span class=\"hljs-string\">\"fmt\"<\/span>\r\n<span class=\"hljs-string\">\"sync\"<\/span>\r\n_ <span class=\"hljs-string\">\"github.com\/go-sql-driver\/mysql\"<\/span>\r\n)\r\n<span class=\"hljs-function\"><span class=\"hljs-keyword\">func<\/span> <span class=\"hljs-title\">main<\/span><span class=\"hljs-params\">()<\/span><\/span> {\r\ndb, err := sql.Open(<span class=\"hljs-string\">\"mysql\"<\/span>, <span class=\"hljs-string\">\"user:password@tcp(localhost:3306)\/database\"<\/span>)\r\n<span class=\"hljs-keyword\">if<\/span> err != <span class=\"hljs-literal\">nil<\/span> {\r\nfmt.Println(<span class=\"hljs-string\">\"Failed to connect to database:\"<\/span>, err)\r\n<span class=\"hljs-keyword\">return<\/span>\r\n}\r\n<span class=\"hljs-keyword\">defer<\/span> db.Close()\r\n<span class=\"hljs-comment\">\/\/ \u5e76\u53d1\u67e5\u8be2\u6570\u91cf<\/span>\r\nconcurrency := <span class=\"hljs-number\">10<\/span>\r\n<span class=\"hljs-comment\">\/\/ \u521b\u5efaWaitGroup\u5bf9\u8c61<\/span>\r\n<span class=\"hljs-keyword\">var<\/span> wg sync.WaitGroup\r\n<span class=\"hljs-comment\">\/\/ \u589e\u52a0\u7b49\u5f85\u7684goroutine\u6570\u91cf<\/span>\r\nwg.Add(concurrency)\r\n<span class=\"hljs-keyword\">for<\/span> i := <span class=\"hljs-number\">0<\/span>; i &lt; concurrency; i++ {\r\n<span class=\"hljs-keyword\">go<\/span> <span class=\"hljs-function\"><span class=\"hljs-keyword\">func<\/span><span class=\"hljs-params\">(id <span class=\"hljs-type\">int<\/span>)<\/span><\/span> {\r\n<span class=\"hljs-keyword\">defer<\/span> wg.Done()\r\n<span class=\"hljs-comment\">\/\/ \u6267\u884c\u6570\u636e\u5e93\u67e5\u8be2\u64cd\u4f5c<\/span>\r\nrows, err := db.Query(<span class=\"hljs-string\">\"SELECT * FROM table\"<\/span>)\r\n<span class=\"hljs-keyword\">if<\/span> err != <span class=\"hljs-literal\">nil<\/span> {\r\nfmt.Println(<span class=\"hljs-string\">\"Failed to query database:\"<\/span>, err)\r\n<span class=\"hljs-keyword\">return<\/span>\r\n}\r\n<span class=\"hljs-keyword\">defer<\/span> rows.Close()\r\n<span class=\"hljs-comment\">\/\/ \u5904\u7406\u67e5\u8be2\u7ed3\u679c<\/span>\r\n<span class=\"hljs-keyword\">for<\/span> rows.Next() {\r\n<span class=\"hljs-comment\">\/\/ ...<\/span>\r\n}\r\n}(i)\r\n}\r\n<span class=\"hljs-comment\">\/\/ \u7b49\u5f85\u6240\u6709goroutine\u5b8c\u6210<\/span>\r\nwg.Wait()\r\nfmt.Println(<span class=\"hljs-string\">\"All queries completed.\"<\/span>)\r\n}\r\n<\/code><\/pre>\n<p>\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001\u6700\u521d\u306bWaitGroup\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3057\u3001\u4e26\u5217\u30af\u30a8\u30ea\u6570\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001\u5f85\u6a5f\u3059\u308bgoroutine\u6570\u3092\u5897\u52a0\u3055\u305b\u3001WaitGroup\u306e\u30ab\u30a6\u30f3\u30c8\u3092\u5897\u3084\u3057\u307e\u3059\u3002\u5404goroutine\u5185\u3067\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30af\u30a8\u30ea\u64cd\u4f5c\u3092\u5b9f\u884c\u3057\u3001\u30af\u30a8\u30ea\u304c\u5b8c\u4e86\u3057\u305f\u5f8c\u306bDone\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u30ab\u30a6\u30f3\u30c8\u3092\u6e1b\u3089\u3057\u307e\u3059\u3002\u6700\u5f8c\u306b\u3001Wait\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u5168\u3066\u306egoroutine\u306e\u5b9f\u884c\u5b8c\u4e86\u3092\u5f85\u3061\u307e\u3059\u3002<\/p>\n<p>WaitGroup\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u5168\u3066\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30af\u30a8\u30ea\u51e6\u7406\u304c\u5b8c\u4e86\u3057\u305f\u4e8b\u3092\u78ba\u8a8d\u3057\u3001\u305d\u306e\u5f8c\u306b\u51e6\u7406\u3092\u7d9a\u884c\u3059\u308b\u3053\u3068\u3067\u3001\u9ad8\u4e26\u5217\u30a2\u30af\u30bb\u30b9\u3092\u78ba\u7acb\u3057\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>WaitGroup \u306f\u3001Go\u8a00\u8a9e\u306b\u304a\u3044\u3066\u3001\u4e00\u9023\u306eGoroutine\u304c\u5b9f\u884c\u3092\u7d42\u3048\u308b\u306e\u3092\u5f85\u3064\u305f\u3081\u306e\u4ed5\u7d44\u307f\u3067\u3059\u3002\u9ad8\u4e26\u884c\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30a2\u30af\u30bb\u30b9\u3067\u306f\u3001\u3059\u3079\u3066\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u64cd\u4f5c\u304c\u5b8c\u4e86\u3057\u305f\u5f8c\u306b\u5f8c\u7d9a\u51e6\u7406\u3092\u5b9f\u884c\u3059\u308b\u305f\u3081\u306bWaitGroup [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-117789","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ 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\u306f\u3001Go\u8a00\u8a9e\u306b\u304a\u3044\u3066\u3001\u4e00\u9023\u306eGoroutine\u304c\u5b9f\u884c\u3092\u7d42\u3048\u308b\u306e\u3092\u5f85\u3064\u305f\u3081\u306e\u4ed5\u7d44\u307f\u3067\u3059\u3002\u9ad8\u4e26\u884c\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30a2\u30af\u30bb\u30b9\u3067\u306f\u3001\u3059\u3079\u3066\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u64cd\u4f5c\u304c\u5b8c\u4e86\u3057\u305f\u5f8c\u306b\u5f8c\u7d9a\u51e6\u7406\u3092\u5b9f\u884c\u3059\u308b\u305f\u3081\u306bWaitGroup [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/\u9ad8\u4e26\u884c\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30a2\u30af\u30bb\u30b9-go\u306b\u304a\u3051\u308bgo-waitgroup\u624b\u6cd5\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-23T02:50:07+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-03-27T11:34:40+00:00\" \/>\n<meta name=\"author\" content=\"\u685c, \u6625\u6a39\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u57f7\u7b46\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u685c, \u6625\u6a39\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u63a8\u5b9a\u8aad\u307f\u53d6\u308a\u6642\u9593\" \/>\n\t<meta name=\"twitter:data2\" content=\"1\u5206\" \/>\n<script type=\"application\/ld+json\" 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