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Join Stream

Synopsis​

This operator performs a join operation on two data streams in a streaming analytic workflow.

Description​

This is a streaming operator and needs to be placed inside a Streaming Nest or a Streaming Optimization operator. The operator defines the logical functionality and can be used in all streaming analytic workflow for any supported streaming platform (currently Flink and Spark). The actual implementation used depends on the type of connection connected to the Streaming Nest operator in which this operator is placed.

Input​

input stream 1​

The left input stream of this stream join operation. It needs to receive the output of a preceding streaming operator, to define the flow of data events in the streaming analytic workflow.

input stream 2​

The right input stream of this stream join operation. It needs to receive the output of a preceding streaming operator, to define the flow of data events in the streaming analytic workflow.

Output​

output stream​

The joined output of this stream join operation. Connect it to the next Streaming operator to define the flow of the data events in the designed streaming analytic workflow.

Parameters​

Left key​

Key of the value to be used on the left-stream.

Right key​

Key of the value to be used on the right-stream.

Window length​

Length of the window to be used for joining.