- 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(....
<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...
ProcessWindowFunction接口 /// 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{privatestaticfin...
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...
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 > |...
简单来说,窗口操作主要有两个部分:窗口分配器(Window Assigners)和窗口函数(Window Functions)。 stream.keyBy(<key selector>) .window(<window assigner>) .aggregate(<window function>) 经窗口分配器处理之后,数据可以分配到对应的窗口中,而数据流经过转换得到的数据类型是 WindowedStream。这个类型并不是 DataStre...
(or one of its child windows), or by using the ALT+ESC or ALT+TAB key combination. An application activates a top-level window by calling theSetActiveWindowfunction. Other functions can cause the system to activate a different top-level window, includingSetWindowPos,DeferWindowPos,Set...
uint KeyMax Returns the maximum keyCode value More...uint KeyReturn Returns the 'KeyReturn' keycode More...uint Key1 Returns the 'Key1' keycode More...uint Key2 Returns the 'Key2' keycode More...uint Key3 Returns the 'Key3' keycode More......
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...
security.keyvault.administration.models com.azure.security.keyvault.certificates com.azure.security.keyvault.certificates.models com.azure.security.keyvault.keys.cryptography com.azure.security.keyvault.keys com.azure.security.keyvault.keys.models com.azure.security.keyvault.keys.cry...