GEMOC Studio Documentation
Developer Guide

Minimal steps to get an addons:

For a given notification to IEngineAddon (for example aboutToExecuteStep), the order of calls to all registered addons is by default not ensured.

However, an addon can declare some EngineAddonSortingRule in order to indicate if the addon mus be called before or after another addon for a given EngineEvent.

The other addon can be identified either via its id or any tag that has been associated to it.

The implicit GemocDebug addon is in charge to lock the execution when it receives a pause command. Addons that displays some information on the UI may wish to be called before it in order to make sure to provide updated information.

This snippet show how to add a rule that enforce this.

public class MyAddon implements IEngineAddon {

	@Override
	public void aboutToExecuteStep(IExecutionEngine<?> engine, Step<?> logicalStepToApply) {
		// do some refresh action
	}

	@Override
	public List<EngineAddonSortingRule> getAddonSortingRules() {  
		ArrayList<EngineAddonSortingRule> sortingRules = new ArrayList<EngineAddonSortingRule>();
		sortingRules.add(new EngineAddonSortingRule( this,
				EngineAddonSortingRule.EngineEvent.aboutToExecuteStep,
				EngineAddonSortingRule.Priority.BEFORE,
				Arrays.asList(IGemocDebugger.GROUP_TAG))); 
		return sortingRules;
	}
}