How do I send a message from one process to another?

BPMN & Modeling Discussion & Questions
2

You have to execute the message through a expression, java delegate, or script.

here is a simple example to get you started using a expression:

${execution.getProcessEngineServices().getRuntimeService().createMessageCorrelation("message_bar").correlateWithResult()}

see: https://docs.camunda.org/javadoc/camunda-bpm-platform/7.8/org/camunda/bpm/engine/runtime/MessageCorrelationBuilder.html for more API options.

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