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Apache Apex的Operators | 斑斓
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Operator是Apache Apex平台进行数据处理的最基本构建模块。Apex将要处理的数据抽象为tuple，而tuple就是流动在operator之间。Apex的operator可以通过由DAG（Directed Acyclic Graph，有向无环图）组成的Stream进行连接。因此，在Apex架构体系与数据流模型中，一个典型的Apex流应用是由DAG来呈现的，而DAG又包括了数据流（称之
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