TopologyBuilder及其API

A component that is used to build a ProcessorTopology. A topology contains an acyclic graph of sources, processors, and sinks. A source is a node in the graph that consumes one or more Kafka topics and forwards them to its child nodes. A processor is a node in the graph that receives input records from upstream nodes, processes that records, and optionally forwarding new records to one or all of its children. Finally, a sink is a node in the graph that receives records from upstream nodes and writes them to a Kafka topic. This builder allows you to construct an acyclic graph of these nodes, and the builder is then passed into a new KafkaStreams instance that will then begin consuming, processing, and producing records.

用于构建处理器拓扑的组件。拓扑包含源、处理器和接收器的非循环图。源是图形中的一个节点，它使用一个或多个Kafka主题并将其转发给它的子节点。处理器是图中的一个节点，它接收来自上游节点的输入记录，处理记录，并可选择地将新记录转发给它的一个或所有子节点。最后，sink是图中的一个节点，它接收来自上游节点的记录并将它们写入Kafka主题。这个构建器允许您构造这些节点的非循环图，然后将构建器传递到一个新的KafkaStreams实例，然后开始消费、处理和生成记录。