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An automatic node is mainly used to assign third-party data to process variables by configuring execution actions, either through service registration or Groovy.

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Third-Party Service

When configuring an execution action, you can Select a successfully registered third-party service. Then assign the return value of the third-party service to a process variable.
The third-party service must be registered first. For details, see Service Registration.

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Groovy Settings

You can assign values to process variables through Groovy Settings. Enter the correct process variable name and write the value to be assigned in the execution script.
  • The variable must be defined in the process Attribute.
  • Quotes must be added when assigning a string, for example “HelloWorld”.
After assignment, this value can be used for evaluation in online execution rules.

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Execution Action Configuration Instructions

If the callback interface is an HTTP interface, it must meet the following requirements:
  • The HTTP method must be POST.
  • Request parameters must be placed in the RequestBody.
  • uuid is a system keyword and cannot be used.
  • If a SHA256 Signature key is used during service registration, the callback parameter __hmacSha256 must be added.
  • md5 is the default Signature method added by the service callback. If no key is set during service registration, the system’s default key is used for signing. If a key is set, the configured key is used for signing, and the callback parameter is sign.
Refer to the following simple sample callback interface written in Java: