Both message events and signal events in Camunda are used to trigger corresponding tasks or actions in the workflow, but there are some differences between them.
The difference is as follows:
1. The purposes of message events and signal events are different: message events are used to receive and send messages, while signal events are used to trigger tasks or operations.
2. The triggering methods of message events and signal events are different: message events are usually triggered by messages sent by external systems, while signal events are triggered by tasks or operations inside the workflow.
3. The data transmission methods of message events and signal events are different: message events usually need to transmit the content and format of the message, while signal events can transmit any type of data, such as integers, strings, Boolean values, etc.
4. The application scenarios of message events and signal events are different: message events are usually used to process asynchronous messages, such as receiving order information or user requests, while signal events are usually used to process internal workflow events, such as a task has been completed or A condition has been met.
It is necessary to select the appropriate event type according to the actual situation in order to achieve the correctness and maintainability of the workflow.