jBPM Workflow Tutorial: ➕ Parallel Gateway (AND)

 🚀 Introduction

The ➕ Parallel Gateway (AND) in jBPM is used to split a process into multiple branches that run at the same time, and to synchronize branches back together.
Unlike ❌ Exclusive (XOR) or 🟢 Inclusive (OR), the Parallel Gateway does not evaluate conditions — it always executes all outgoing paths in parallel.

This is useful for workflows where multiple tasks must happen together, such as sending notifications, logging events, and running approvals simultaneously.

🛠️ Prerequisites

  • 💻 jBPM/Business Central & KIE Server installed

  • ☕ JDK 11+ (JDK 17 also works)

  • 👨‍💼 Roles with access to tasks (e.g., manager, analyst)

  • 🌐 Access: http://localhost:8080/business-central

📝 Step 1: Create a New Process

  1. 🔑 Log in to Business Central

  2. 📂 Create a project: parallel-gateway-demo

  3. ➕ Add Business Process: ParallelProcess

    • Id: com.example.parallel

    • Package: com.example

🎨 Step 2: Design the Workflow

  1. 🔵 Add a Start node

  2. ➕ Add a Parallel Gateway (Split)

  3. 📧 Add an Email Task (Send Notification)

  4. 📊 Add a Report Task (Generate Report)

  5. 👤 Add a Human Task (Manager Approval)

  6. ➕ Add a Parallel Gateway (Join)

  7. ✅ Add an End node

🔗 Connect them:
Start → ➕ Split → (📧 Email, 📊 Report, 👤 Human Task) → ➕ Join → ✅ End

⚙️ Step 3: Behavior of Parallel Gateway

  • At the Split Gateway, all outgoing paths fire together

  • At the Join Gateway, process waits until all incoming paths are complete before moving forward

🔨 Step 4: Build and Deploy

  1. 💾 Save the process

  2. 🛠️ Build & Install

  3. 📦 Deploy to KIE Server

▶️ Step 5: Run the Process

  1. Go to Manage → Process Definitions

  2. ▶️ Start a new instance of ParallelProcess

  3. All three tasks (📧 Email, 📊 Report, 👤 Human Task) will be active at the same time

  4. Once all tasks complete → flow continues to the End node

📌 Step 6: Example Use Cases

  • 📧 Notify customers while 📊 generating reports

  • 👤 Approvals while sending system alerts

  • Multi-team collaboration where tasks run in parallel


👉 Watch jBPM Workflow Tutorial: ➕ Parallel Gateway (AND) in Action better:

Here's a quick video to help you understand jBPM Workflow Tutorial: ➕ Parallel Gateway (AND)  in Action better: 
jBPM Gateways Tutorial in Hindi | Exclusive, Inclusive & Parallel Explained

👉 Source code: https://github.com/LearnITWithShikha/GatewayExamples


🛠️ Troubleshooting

  • ❌ Process stuck at Join? → Ensure all parallel paths complete

  • ⚠️ One branch skipped? → Check connections; Parallel Gateways do not use conditions

  • 🔄 Overlapping roles? → Assign proper actors to Human Tasks

🎯 Conclusion

The ➕ Parallel Gateway (AND) is essential for workflows requiring parallel execution and synchronization.

It ensures that:

  • ➕ All branches run together at split

  • ⏸️ The process waits until all are done at join

By mastering Parallel Gateways, you can build real-world business processes that handle simultaneous actions — such as approvals, notifications, and system tasks — in an efficient and synchronized way.

💼 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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