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Message Catching Intermediate Event

Introduction​

Process execution is delayed until a particular message is received. Messaging happens typically within one process instance.

tip

When you would like to receive messages and also provide additional content, the Intermediate Event Registry Catch might be the better option.

Properties​

General​

AttributeTypeDescriptionCategory
Model Id Text

Model Id identifies the element within the process model.

The model id, name and documentation properties can be found on any element. They are used respectively to uniquely identify the intermediate catching message event, to give it a user-friendly name and to add a free-form description.

Name Expression usage possibleText

The name of the element. This is the name displayed in the diagram.

Documentation Multiline Text

A free-form text that can be used to explain details about the particular element.

Message reference Selection

A message reference from the message definitions of the root model, usually the process.

This intermediate catching message event will wait until a matching message event is caught.

Select either a message definition that's been configured on the root level or use a message expression.

Message expression Expression usage possibleText

An expression resolving to a message name, without needing to define a message event on the process instance level. The message reference has precedence, if set.

Advanced​

AttributeTypeDescriptionCategory
Execution listeners List

Allows invoking custom after certain lifecycle events.

Start: Executes after the activity has been started.

End: Executes after the activity was completed.

Transition: When defined on a sequence flow, executes once the flow is transition is taken.

Execution listeners are used to add logic on certain lifecycle events.

Typically it is used to add extra technical logic which shouldn't be visible in the BPMN process model.

Visual​

AttributeTypeDescriptionCategory
Font size Selection:
  • 8
  • 9
  • 10
  • 11
  • 12
  • 14
  • 18
  • 20
  • 24
  • 36
  • 48
  • 72

Font size.

Visual properties that determine how the intermediate message event is shown in the diagram.

This has no impact on the runtime execution.

Font weight Selection:
  • Normal
  • Bold

Select the style between bold and normal.

Border color RequiredColor

The border color of the element in the diagram.

Font style Selection:
  • Normal
  • Italic

Select the style between italic and normal.

Font color Color

Select a font color.

Background color RequiredColor

The background color of the element in the diagram.

List Attribute Details​

Execution listeners​

AttributeTypeDescription
Event RequiredSelection:
  • Start
  • End
  • Take

The lifecycle event. The 'Take' event is only available for sequence flow.

Class Text

Fully qualified classname of a class to be invoked when executing the task. The class must implement either JavaDelegate or ActivityBehavior.

Expression Text

JUEL Expression to be executed when the task is started. Expressions allow you to interact with the backend by calling services, making calculations etc. You can find more information about expressions in the documentation.

Delegate expression Text

Delegate Expression to be executed when the task is started. A delegate expression must resolve to a Java object, for instance a Spring bean. The object's class must implement either JavaDelegate or ActivityBehavior.

Fields List

Fields​

AttributeTypeDescription
Name Text

The name of the element. This is the name displayed in the diagram.

String value Text
Expression Text

JUEL Expression to be executed when the task is started. Expressions allow you to interact with the backend by calling services, making calculations etc. You can find more information about expressions in the documentation.

String Text