{"published":"2024-06-20 15:20:18","author_name":"irof","type":"rich","provider_name":"Hatena Blog","version":"1.0","url":"https://irof.hateblo.jp/entry/2024/06/20/152018","blog_url":"https://irof.hateblo.jp/","image_url":"https://cdn-ak.f.st-hatena.com/images/fotolife/i/irof/20240620/20240620150511.png","title":"ThreadContext\u3084MDC\u306fremove\u305b\u305a\u306bclose\u3057\u3088\u3046","width":"100%","categories":["Java"],"height":"190","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Firof.hateblo.jp%2Fentry%2F2024%2F06%2F20%2F152018\" title=\"ThreadContext\u3084MDC\u306fremove\u305b\u305a\u306bclose\u3057\u3088\u3046 - \u65e5\u3005\u5e38\u3005\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","author_url":"https://blog.hatena.ne.jp/irof/","description":"\u65b0\u304f\u3082\u306a\u3093\u3068\u3082\u306a\u3044\u8a71\u3067\u3059\u3002\u5f53\u305f\u308a\u524d\u3068\u601d\u3046\u4eba\u306b\u306f\u6614\u304b\u3089\u5f53\u305f\u308a\u524d\uff08\u6614\u5ea6\u5408\u3044\u306f\u304a\u307e\u3051\uff13\u3092\u53c2\u7167\uff09\u3002\u3067\u3082\u77e5\u3089\u306a\u3044\u3053\u3068\u306f\u60aa\u3067\u306f\u306a\u3044\u3057\u3001\u305d\u3046\u306a\u3093\u3060\u30fc\u3063\u3066\u306a\u308c\u3070\u3044\u3044\u3060\u3051\u306e\u8a71\u3002 \u4e00\u9023\u306e\u30ed\u30b0\u306b\u540c\u3058\u5024\u3092\u4ed8\u4e0e\u3057\u305f\u3044\u6642\u3001 MDC (SLF4J) \u3084 ThreadContext (Log4j2) \u3092\u4f7f\u3046\u304b\u3068\u601d\u3044\u307e\u3059\u3002 \u4e2d\u8eab\u306f java.lang.ThreadLocal \u3068\u304b\u3060\u3063\u305f\u308a\u3059\u308b\u306e\u3067\u3001\u30b5\u30fc\u30d0\u30fc\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3084\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u3067\u306f\u53d6\u308a\u9664\u3044\u3066\u3042\u3052\u306a\u3044\u3068\u4e8b\u6545\u306e\u5143\u3067\u3059\u3002 // \u5fae\u5999\u306a\u3084\u308a\u65b9 void method() { MDC.put(\"username\", \"hoge\"); // ... \u306a\u3093\u304b\u51e6\u7406 MDC.remov\u2026","blog_title":"\u65e5\u3005\u5e38\u3005","provider_url":"https://hatena.blog"}