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66 lines
2.5 KiB
Markdown
66 lines
2.5 KiB
Markdown
# Exclusive Gateways Example
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## Overview
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Exclusive Gateways in BPMN serve as decision points that dictate the flow of a process based on conditional logic.
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This example demonstrates the use of an Exclusive Gateway to manage conditional routing following user input from a form.
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## Process Steps
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1. **User Task: Show User Form**
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- **Purpose**: Captures user data which influences pathway decisions.
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- **Form Configuration**:
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```json
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{
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"title": "First Name Required",
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"type": "object",
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"required": ["firstName"],
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"properties": {
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"firstName": {
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"type": "string",
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"title": "First name",
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"default": "Chuck"
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}
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}
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}
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```
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- **Role**: Collects inputs that determine the execution path through the Exclusive Gateway.
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2. **Exclusive Gateway**: Evaluates the `firstName` property from the form to decide the subsequent pathway.
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**Sequence Flows**:
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**a**. **Others**: Leads to a general greeting for users not named "Chuck."
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**For 'Others' Sequence Flow**:
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- **Condition Expression**: `firstName != "Chuck"`
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- Goes to **Manual Task**: "Hello to Others" displays a greeting to non-Chuck users.
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**b**. **Chuck**: Directs to a personalized greeting for users named "Chuck."
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**For 'Chuck' Sequence Flow**:
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- **Condition Expression**: `firstName == "Chuck"`
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- Goes to **Manual Task**: "Hi to Chuck" delivers a custom greeting to users named Chuck.
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3. **Exclusive Gateway Merge**: Merges the paths from manual tasks: "Hello to Others" and "Hi to Chuck," continuing to the next unified step in the process.
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4. **Manual Task: Show End Message**: Concludes the interaction by displaying a closing message and displays "Thank you for your participation, {{firstName}}."
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After the manual task, marks the completion of the process through the end event.
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Therefore, Exclusive Gateways are critical in BPMN for managing decisions within the workflow that require conditional logic based on user input or other process variables.
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They ensure that the process flow is correctly directed based on specific conditions, preventing incorrect executions and ensuring that the process adapts dynamically to varying inputs.
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