Mastering Microservices with Java - Third Edition

Wiring input and output

You must be wondering how you wire the input and output of workflows and tasks. You may want to give an input while starting a workflow or want to pass the output of one task to another. Actually, while configuring the workflow blueprint, you define the input and output parameters. These parameters are used to wire the values in the input parameters of the task. Similarly, you can wire the output parameters of the workflow from the output of task output parameters.

The syntax for mapping the values follows this pattern:

${SOURCE.input/output.JSONPath}

The preceding command is explained as follows:

SOURCE	Can be either "workflow" or the reference name of any of the tasks
input/output	Refers to either the input ...