- 将输入原始流stream转换成多个Keyed stream- 每个Keyed stream会独立进行计算,这样多个Task可以对Windowing操作进行并行处理- 具有相同Key的数据元素会被发到同一个Task中进行处理 方括号([…])中的命令是可选的。这表明Flink允许程序员以许多不同的方式定制窗口逻辑,以便它最适合实际的业务需求。 stream .keyBy(....
RANGE works with a single sort key of numeric, datetime, or interval data type. It is for data that is a little fuzzy on the edges, if you will. If ROWS is specified, then sort list is made of exact numeric with scale zero. < window frame extent >::= < window frame start > |...
<S extends Serializable> ValueState<S> getKeyValueState(String name, Class<S> stateType, S defaultState); // 同getPartitionedState功能,该方法已被标记过时 @Deprecated <S extends Serializable> ValueState<S> getKeyValueState(String name, TypeInformation<S> stateType, S defaultState); } // Tr...
String record="Key: "+key+" 窗口开始时间: "+windowStart+" 窗口结束时间: "+windowEnd+" 浏览的商品的最大价值对应的那条记录: "+max; out.collect(record); } } ) .print(); // 结果 Key: user_2 窗口开始时间: 2019-11-09 13:54:10 窗口结束时间: 2019-11-09 13:54:20 浏览的商品的最...
consider the source order not to perform redundant sorting -- this one might require massive refactoringwindow functions: use storage sorting key#19289 work efficiently w/multiple windows (choose an order of windows that allows to sort less)Try to find sort order that satisfies multiple windows#197...
/// Source code recreated from a .class file by IntelliJ IDEA// (powered by FernFlower decompiler)//packageorg.apache.flink.streaming.api.functions.windowing;@PublicEvolvingpublicabstractclassProcessWindowFunction<IN,OUT,KEY,WextendsWindow>extendsAbstractRichFunction{privatestaticfinallongserialVersionUID=1L...
* which it was assigned. The set of elements with the same key and window is called a pane. * When a {@link Trigger} decides that a certain pane should fire the * {@link org.apache.flink.streaming.api.functions.windowing.WindowFunction} is applied ...
1importlombok.AllArgsConstructor;2importlombok.Data;3importlombok.NoArgsConstructor;45@Data6@AllArgsConstructor7@NoArgsConstructor8//用户行为9publicclassUserCommonAct {10//用于分组的key 可以是userId、分类ID等11publicString itemId;12//数量13publicLong nums;14//结束时间 时间戳15publicLong end;16} ...
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CoGroupedStreams提供了where操作,用于指定input1的keySelector,它创建并返回Where对象 Where flink-streaming-java_2.11-1.7.0-sources.jar!/org/apache/flink/streaming/api/datastream/CoGroupedStreams.java 代码语言:javascript 代码运行次数:0 运行 AI代码解释 @Public public class Where<KEY> { private final Ke...