WebWorking with State # In this section you will learn about the APIs that Flink provides for writing stateful programs. Please take a look at Stateful Stream Processing to learn about the concepts behind stateful stream processing. Keyed DataStream # If you want to use keyed state, you first need to specify a key on a DataStream that should be used to … Web11 apr. 2024 · ListStateDescriptor.initializeSerializerUnlessSet()方法的具体详情如下: 包路径:org.apache.flink.api.common.state.ListStateDescriptor 类名称:ListStateDescriptor 方法名:initializeSerializerUnlessSet. ListStateDescriptor.initializeSerializerUnlessSet介绍. 暂无. 代码示例. 代码示例来 …
Working with State Apache Flink
Web7 apr. 2024 · 可见状态的管理并不是一件轻松的事。. 好在 Flink 作为有状态的大数据流式处理框架,已经帮我们搞定了这一切。. Flink 有一套完整的状态管理机制,将底层一些核心功能全部封装起来,包括状态的高效存储和访问、持久化保存和故障恢复,以及资源扩展时的 ... Web21 uur geleden · Then I'll broadcast these values into a KeyedBroadcastProcessFunction that will receive both the EVENT_C records and the exclusion_id values. BroadcastStream exclusionIdBroadcastStream = sStream .join (aStream) .where (new KeySelector () { @Override public Object getKey (EventS value) … cubs pitching schedule
聊聊flink的StateDescriptor - 简书
WebTopN的常见应用场景,最热商品购买量,最高人气作者的阅读量等等。 1. 用到的知识点 2. 案例介绍 通过用户访问日志,计算最近一段时间平台最活跃的几位用户topN。 3. 数据源 这里通过随机数来扰乱username,便于使用户名大小不一,让结果更加明显。KafkaUtil… Webval opCntDescriptor = new ListStateDescriptor[Long]("opCnt", classOf[Long]) opCntState = initContext.getOperatorStateStore.getListState(opCntDescriptor) // initialize local variable … cubs pitching staff 2016