{"id":160567,"date":"2020-09-26T04:38:35","date_gmt":"2020-09-25T20:38:35","guid":{"rendered":"http:\/\/4563.org\/?p=160567"},"modified":"2020-09-26T04:38:35","modified_gmt":"2020-09-25T20:38:35","slug":"%e6%b1%82%e9%97%ae%e5%a6%82%e4%bd%95%e7%94%a8-python-%e8%af%bb%e5%8f%96-kafka-topic-%e6%9c%80%e6%96%b0%e4%b8%80%e6%9d%a1%e6%95%b0%e6%8d%ae%e7%9a%84-timestamp","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=160567","title":{"rendered":"\u6c42\u95ee\u5982\u4f55\u7528 Python \u8bfb\u53d6 Kafka topic \u6700\u65b0\u4e00\u6761\u6570\u636e\u7684 timestamp"},"content":{"rendered":"<div>\n<div>\n<div>\n<h1>                  \u6c42\u95ee\u5982\u4f55\u7528 Python \u8bfb\u53d6 Kafka topic \u6700\u65b0\u4e00\u6761\u6570\u636e\u7684 timestamp               <\/h1>\n<p> <\/p>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : levelworm <\/span>  <span><i><\/i> 0<\/span> <\/div>\n<div> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<div isfirst=\"1\"> <\/p>\n<p>\u6211\u60f3\u8981\u8bfb Kafka topic \u6700\u65b0\u4e00\u6761\u6570\u636e\u7684\u65f6\u95f4\u6233\uff0c\u7136\u540e\u7528\u8fd9\u4e2a\u65f6\u95f4\u6233\u5728 vertica \u91cc\u5934\u505a\u4e3a partition \u7684\u4f9d\u636e\u3002\u4e0d\u8fc7\u73b0\u5728\u7684\u95ee\u9898\u662f\uff0c\u4f7f\u7528<code>seek_to_end()<\/code>\u4e4b\u540e\uff0c\u5c31\u9677\u5165\u5230\u6b7b\u5faa\u73af\u4e86\uff0c\u4e00\u6761\u6570\u636e\u4e5f\u6ca1\u653e\u51fa\u6765\uff0c\u6211\u89c9\u5f97\u5e94\u8be5\u80fd\u653e\u51fa\u6700\u540e\u4e00\u6761\u6d88\u606f\u7684\u554a\uff1f\u8bf7\u95ee\u6211\u54ea\u91cc\u5f04\u9519\u4e86\uff1f<\/p>\n<p>\u8fd9\u662f\u6211\u7684\u4ee3\u7801\uff1a<\/p>\n<pre><code> topic: str = 'mytopic' broker: str = 'myserver'  consumer = KafkaConsumer(     bootstrap_servers=[broker],     enable_auto_commit=True )  tp = TopicPartition(topic, 0) consumer.assign([tp]) consumer.poll() consumer.seek_to_end()  for message in consumer:     print(message.timestamp)     print(message)  consumer.close()  <\/code><\/pre>\n<\/p><\/div>\n<div> <b>\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (<span>2<\/span>)        <\/div>\n<div> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<ul>\n<li data-pid=\"3471180\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u4e3b<\/span> <span>\u8cc7\u6df1\u5927\u4f6c : levelworm <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u6211\u53c8\u8bd5\u4e86\u4e0b\uff0c\u53ef\u4ee5\u770b\u5230 offset\uff0c\u8be1\u5f02\u554a\u3002\u3002\u3002\u7167\u7406\u8bf4\u80fd\u770b\u5230 offset \u4e0d\u5c31\u5e94\u8be5\u80fd\u591f\u770b\u5230\u6d88\u606f\u5417\uff1f\u8fd8\u662f\u6211\u7406\u89e3\u9519\u4e86\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"3471181\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u4e3b<\/span> <span>\u8cc7\u6df1\u5927\u4f6c : levelworm <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u6211\u641e\u5b9a\u4e86\u6211\uff0c\u539f\u6765 seek_to_end()\u4e4b\u540e\u4ed6\u7ed9\u6211\u7684\u662f\u6700\u540e\u4e00\u4e2a offset+1\uff0c\u90a3\u6211\u7684 Kafka \u6b64\u65f6\u5e76\u6ca1\u6709\u63a5\u53d7\u65b0\u7684\u6d88\u606f\uff0c\u90a3\u80af\u5b9a\u662f\u4e0d\u4f1a\u663e\u793a\u4efb\u4f55\u4e1c\u897f\u4e86\uff0c\u6211\u53ea\u9700\u8981\u628a offset-1 \u7136\u540e\u518d seek \u5373\u53ef\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li>\n","protected":false},"excerpt":{"rendered":"<p>\u6c42\u95ee\u5982\u4f55\u7528 Python \u8bfb\u53d6 K&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/160567"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=160567"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/160567\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=160567"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=160567"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=160567"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}