{"id":15316,"date":"2023-12-04T17:52:48","date_gmt":"2023-12-04T09:52:48","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=15316"},"modified":"2023-12-16T10:22:30","modified_gmt":"2023-12-16T02:22:30","slug":"zookeeper-zhong-fu-wu-duan-chu-liwatcher-shi-zen-y","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/04\/zookeeper-zhong-fu-wu-duan-chu-liwatcher-shi-zen-y\/","title":{"rendered":"ZooKeeper\u4e2d\u670d\u52a1\u7aef\u5904\u7406Watcher\u662f\u600e\u6837\u5b9e\u73b0\u7684\uff1f"},"content":{"rendered":"

\u5728ZooKeeper\u4e2d\uff0c\u670d\u52a1\u7aef\u5904\u7406Watcher\u662f\u901a\u8fc7\u5728\u6570\u636e\u8282\u70b9\u4e0a\u6ce8\u518cWatcher\uff0c\u4ee5\u53ca\u5728\u76f8\u5173\u4e8b\u4ef6\u53d1\u751f\u65f6\u901a\u77e5\u5ba2\u6237\u7aef\u7684\u673a\u5236\u6765\u5b9e\u73b0\u7684\u3002\u4ee5\u4e0b\u662f\u670d\u52a1\u7aef\u5904\u7406Watcher\u7684\u57fa\u672c\u6d41\u7a0b\uff1a<\/p>\n

    \n
  1. \nWatcher\u7684\u6ce8\u518c\uff1a<\/strong> \u5f53\u5ba2\u6237\u7aef\u901a\u8fc7ZooKeeper API\u7684exists<\/code>\u3001getData<\/code>\u3001getChildren<\/code>\u7b49\u64cd\u4f5c\u6ce8\u518cWatcher\u65f6\uff0c\u5ba2\u6237\u7aef\u4f1a\u5411ZooKeeper\u670d\u52a1\u5668\u53d1\u9001\u8bf7\u6c42\uff0c\u8bf7\u6c42\u5728\u6307\u5b9a\u7684\u6570\u636e\u8282\u70b9\u4e0a\u6ce8\u518cWatcher\u3002\n<\/li>\n
  2. \nWatcher\u4fe1\u606f\u5b58\u50a8\uff1a<\/strong> ZooKeeper\u670d\u52a1\u5668\u4f1a\u5c06\u5ba2\u6237\u7aef\u6ce8\u518c\u7684Watcher\u4fe1\u606f\u5b58\u50a8\u5728\u6570\u636e\u8282\u70b9\u7684Watcher\u5217\u8868\u4e2d\u3002\u8fd9\u4e2a\u5217\u8868\u5305\u542b\u4e86\u5bf9\u8be5\u8282\u70b9\u611f\u5174\u8da3\u7684\u6240\u6709Watcher\uff0c\u4ee5\u53ca\u76f8\u5173\u7684\u4f1a\u8bdd\u4fe1\u606f\u3002\n<\/li>\n
  3. \n\u4e8b\u4ef6\u89e6\u53d1\uff1a<\/strong> \u5f53\u6570\u636e\u8282\u70b9\u7684\u72b6\u6001\u53d1\u751f\u53d8\u5316\uff08\u4f8b\u5982\uff0c\u8282\u70b9\u6570\u636e\u88ab\u66f4\u65b0\u3001\u5b50\u8282\u70b9\u53d1\u751f\u53d8\u5316\u7b49\uff09\u65f6\uff0cZooKeeper\u670d\u52a1\u5668\u4f1a\u68c0\u67e5\u8be5\u8282\u70b9\u7684Watcher\u5217\u8868\uff0c\u5e76\u5c06\u76f8\u5e94\u7684Watcher\u4e8b\u4ef6\u4fe1\u606f\u5c01\u88c5\u6210WatchedEvent<\/code>\u5bf9\u8c61\u3002\n<\/li>\n
  4. \nWatchedEvent\u901a\u77e5\uff1a<\/strong> ZooKeeper\u670d\u52a1\u5668\u901a\u8fc7\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u5668\u4e4b\u95f4\u7684\u4f1a\u8bdd\u901a\u9053\uff0c\u5c06WatchedEvent<\/code>\u5bf9\u8c61\u53d1\u9001\u7ed9\u5ba2\u6237\u7aef\u3002\u8fd9\u4e2a\u4e8b\u4ef6\u5bf9\u8c61\u5305\u542b\u4e86\u4e8b\u4ef6\u7684\u7c7b\u578b\uff08\u5982\u6570\u636e\u53d8\u66f4\u3001\u5b50\u8282\u70b9\u53d8\u66f4\u7b49\uff09\u3001\u4e8b\u4ef6\u53d1\u751f\u7684\u8def\u5f84\u7b49\u4fe1\u606f\u3002\n<\/li>\n
  5. \n\u5ba2\u6237\u7aef\u7684Watcher\u5904\u7406\uff1a<\/strong> \u5ba2\u6237\u7aef\u7684ZooKeeper\u5b9e\u4f8b\u63a5\u6536\u5230WatchedEvent<\/code>\u540e\uff0c\u4f1a\u6839\u636e\u4e8b\u4ef6\u7c7b\u578b\u8c03\u7528\u5ba2\u6237\u7aef\u6ce8\u518c\u7684\u76f8\u5e94Watcher\u7684process<\/code>\u65b9\u6cd5\u3002\u5728\u8fd9\u4e2a\u65b9\u6cd5\u4e2d\uff0c\u5ba2\u6237\u7aef\u53ef\u4ee5\u5904\u7406Watcher\u4e8b\u4ef6\uff0c\u4f8b\u5982\u6267\u884c\u7279\u5b9a\u7684\u4e1a\u52a1\u903b\u8f91\u3001\u91cd\u65b0\u83b7\u53d6\u6570\u636e\u7b49\u3002\n<\/li>\n<\/ol>\n

    \u603b\u4f53\u800c\u8a00\uff0c\u670d\u52a1\u7aef\u5904\u7406Watcher\u7684\u5b9e\u73b0\u6d89\u53caWatcher\u7684\u6ce8\u518c\u3001Watcher\u4fe1\u606f\u7684\u5b58\u50a8\u3001\u4e8b\u4ef6\u7684\u89e6\u53d1\u548c\u901a\u77e5\u7b49\u8fc7\u7a0b\u3002\u8fd9\u79cd\u673a\u5236\u5141\u8bb8\u5ba2\u6237\u7aef\u5b9e\u65f6\u76d1\u6d4bZooKeeper\u4e2d\u6570\u636e\u8282\u70b9\u7684\u53d8\u5316\uff0c\u4ece\u800c\u5b9e\u73b0\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\u7684\u534f\u540c\u64cd\u4f5c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

    \u5728ZooKeeper\u4e2d\uff0c\u670d\u52a1\u7aef\u5904\u7406Watcher\u662f\u901a\u8fc7\u5728\u6570\u636e\u8282\u70b9\u4e0a\u6ce8\u518cWatcher\uff0c\u4ee5\u53ca\u5728\u76f8\u5173\u4e8b\u4ef6\u53d1\u751f\u65f6\u901a\u77e5 […]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[124],"tags":[],"class_list":["post-15316","post","type-post","status-publish","format-standard","hentry","category-zookeeper"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15316","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=15316"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15316\/revisions"}],"predecessor-version":[{"id":48356,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15316\/revisions\/48356"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=15316"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=15316"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=15316"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}