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 💡 Introduction In real-world business workflows, you often need to perform custom operations—like sending emails, invoking APIs, writing to databases, or integrating with external systems. jBPM makes this possible through 🧩 Work Item Handlers (WIHs) — reusable Java components that execute custom logic in your process. In this tutorial, you’ll learn how to create, register, and use a custom Work Item Handler in jBPM from scratch. 🧠 1️⃣ What is a Work Item Handler? A Work Item Handler is a Java class that executes custom logic when a Service Task in your BPMN process is triggered. Each handler implements the interface: org.kie.api.runtime.process.WorkItemHandler Every Work Item Handler must define two methods: executeWorkItem(WorkItem workItem, WorkItemManager manager) → Executes your logic. abortWorkItem(WorkItem workItem, WorkItemManager manager) → Defines what happens when the work item is canceled. ⚙️ 2️⃣ Create the Custom Handler Class Let’s create ...