ProcessEngineComponent (Camunda Platform Javadocs 7.16.18-ee)

```
@Target(TYPE)
@Retention(RUNTIME)
@Documented
public @interface ProcessEngineComponent
```
Indicates that the given bean is an process engine handler. A process engine handler is a bean that is so annotated to respond to events ("states") in a Camunda Platform process. Generically, it is a class that has been adapted to be usable in a Camunda Platform process.
For example, suppose we have registered a BPMN process that has the following declaration:
<service-task camunda:expression = "myBean" id = "confirm-receipt" />
This is a state that will be entered from Camunda Platform and execution will flow through to the bean registered in the context as "myBean." To subscribe to that, a POJO need only implement (optionally) ProcessEngineComponent and, on a method, add State to indicate that the method in particular is tasked with responding to a state. If applied to a bean and there are no org.camunda.bpm.engine.annotations.ProcessEngineComponent annotations present, then one option might be to automatically enlist all public methods as handlers for states whose IDs or names are inferred from the method name:
public void confirmReceipt(..) would be treated the same as
@State( "confirm-receipt") public void confirmReceipt (..),

Since:

1.0

Author:

Josh Long

- Optional Element Summary
  
  Optional Elements
  Modifier and Type Optional Element Description
  
  java.lang.String processKey

- Element Detail
  - processKey
```
java.lang.String processKey
```
    Default:
    
    ""