jBPM Workflow Tutorial: 🔀 Gateway Example (Approve/Reject Flow)

🚀 Introduction

In this tutorial, you’ll learn how to use a 🔀 Gateway in jBPM to make your process follow different paths based on conditions.
We’ll build a simple approval workflow:

🔵 Start → 👤 Human Task → 🔀 Gateway → ✅ Approved Path / ❌ Rejected Path → 🔴 End

🛠️ Prerequisites

  • 💻 jBPM/Business Central & KIE Server bundle (7.x or 8.x community)

  • ☕ JDK 11+ (JDK 17 also works)

  • 👨‍💼 User with manager role

  • 🌐 Browser access: http://localhost:8080/business-central

📝 Step 1: Create a New Project

  1. 🔑 Log in to Business Central

  2. 📂 Create project: approval-gateway

  3. ➕ Add new Business Process: ApprovalProcess

    • Id: com.example.approval

    • Package: com.example

🎨 Step 2: Design the Workflow

  1. 🔵 Add a Start node

  2. 👤 Add a Human Task → configure:

    • 🏷️ Name: Review Request

    • 👥 Actors: manager

    • 📝 Task Name: review-request

  3. 🔀 Add an Exclusive Gateway (XOR) after Human Task

  4. ✅ Add an End node for Approved path

  5. ❌ Add another End node for Rejected path

  6. 🔗 Connect: Start → Human Task → Gateway → End(Approved/Rejected)

📊 Step 3: Define Data

  • Add process variable:

    • Name: approved

    • Type: Boolean

  • In Human Task form, let the user set approved = true/false

⚙️ Step 4: Configure Gateway Conditions

  1. Select the Gateway → add two outgoing connections:

    • ✅ Approved Path → condition:

      approved == true

    • ❌ Rejected Path → condition:

      approved == false

🔨 Step 5: Build and Deploy

  • 💾 Save process

  • 🛠️ Build & Install project

  • 📦 Ensure deployment to KIE Server

▶️ Step 6: Run the Process

  1. Go to Manage → Process Definitions

  2. ▶️ Start new instance of ApprovalProcess

  3. 👤 Human Task is assigned → open the form → select approve or reject

📌 Step 7: Outcome Paths

  • ✅ If approved = true → flow goes to Approved End node

  • ❌ If approved = false → flow goes to Rejected End node

🛠️ Troubleshooting

  • ❌ Task not visible? → Check user is in manager role

  • ⚠️ Both paths trigger? → Ensure conditions on outgoing connections are mutually exclusive

  • 🔄 Process not completing? → Verify at least one path has a condition set correctly

👉Watch jBPM Gateway Example (Approve/Reject Flow) Practical in Action better: Here's a quick video to help you understand jBPM Gateway Example (Approve/Reject Flow) in Practical in Action better: jBPM Gateways Tutorial in Hindi | Exclusive, Inclusive & Parallel Explained


🎯 Conclusion

The 🔀 Gateway workflow shows how business decisions drive process flow in jBPM. By branching paths based on conditions (like approval/rejection), you make workflows smarter and closer to real-world scenarios.

This simple Approve/Reject example demonstrates:

  • 👤 Using Human Tasks to collect decisions

  • 🔀 Using Exclusive Gateways to branch process flow

  • ✅ / ❌ Different outcomes based on variables

Next, you can explore:

  • 🔀 Parallel Gateways for running tasks simultaneously

  • 🌀 Inclusive Gateways for multiple valid paths

  • 🔗 Combining Gateways with Service or Script Tasks for complex business rules

💼 Professional Support Available

If you are facing issues in real projects related to enterprise backend development or workflow automation, I provide paid consulting, production debugging, project support, and focused trainings.

Technologies covered include Java, Spring Boot, PL/SQL, Azure, and workflow automation (jBPM, Camunda BPM, RHPAM).



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