Execution

Execution Framework

The Strolch Execution Framework is a reactive engine for executing hierarchical business processes defined as Activity and Action elements.

ExecutionHandler

The ExecutionHandler is the central component that manages the execution of activities. It tracks their state and triggers the associated execution policies.

Activity and Action

• Activity: A container for actions or other activities, defining a hierarchy.
• Action: The atomic unit of work. It has a state (e.g., Created, Planned, Execution, Stopped, Executed) and references an ExecutionPolicy.

Execution Policy

An ExecutionPolicy implements the actual logic for an action. It is called by the ExecutionHandler when the action’s state changes.

public class MyExecutionPolicy extends StrolchPolicy implements ExecutionPolicy {
    public MyExecutionPolicy(StrolchTransaction tx) {
        super(tx);
    }

    @Override
    public void toExecution(Action action) {
        // Start execution logic
        setStatus(action, State.EXECUTION);
    }

    @Override
    public void toExecuted(Action action) {
        // Finalize execution
        setStatus(action, State.EXECUTED);
    }
}

Starting Execution

To start the execution of an activity:

ExecutionHandler executionHandler = agent.getComponent(ExecutionHandler.class);
executionHandler.toExecution(realm, activityLocator);

Execution Archiving

Completed activities can be automatically archived (moved to a separate storage or removed) to keep the operational model small and performant.