policy-management/src/main/java/org/openecomp/policy/drools/features/PolicyControllerFeatureAPI.java


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package org.openecomp.policy.drools.features;

import java.util.Properties;

import org.openecomp.policy.drools.system.PolicyController;
import org.openecomp.policy.drools.utils.OrderedService;
import org.openecomp.policy.drools.utils.OrderedServiceImpl;

public interface PolicyControllerFeatureAPI extends OrderedService {

	  /**
	   * called before creating a controller with name 'name' and 
	   * properties 'properties'
	   * 
	   * @param name name of the the controller
	   * @param properties configuration properties
	   * 
	   * @return a policy controller.   A take over of the creation operation
	   * is performed by returning a non-null policy controller.   
	   * 'null' indicates that no take over has taken place, and processing should
	   * continue to the next feature provider.
	   */
	  public PolicyController beforeCreate(String name, Properties properties);

	  /**
	   * called after creating a controller with name 'name'
	   * 
	   * @param controller controller
	   * 
	   * @return true if this feature intercepts and takes ownership
	   * of the operation preventing the invocation of 
	   * lower priority features.   False, otherwise.
	   */
	  public boolean afterCreate(PolicyController controller);
	  
	  /**
	   * Feature providers implementing this interface
	   */
	  public static final OrderedServiceImpl<PolicyControllerFeatureAPI> providers = 
			  						new OrderedServiceImpl<PolicyControllerFeatureAPI>(PolicyControllerFeatureAPI.class);
}