gistfile1.java

public class MyBehaviourPolicy implements NodeServicePolicies.OnCreateChildAssociationPolicy {
private PolicyComponent policyComponent;

	public PolicyComponent getPolicyComponent() {
		return policyComponent;
	}

	public void setPolicyComponent(PolicyComponent policyComponent) {
		this.policyComponent = policyComponent;
	}

        public void init() {
		
	    this.OnCreateChildAssociationPolicy.bindAssociationBehaviour(
		        NodeServicePolicies.OnCreateChildAssociationPolicy.QNAME,
		        ContentModel.TYPE_AUTHORITY_CONTAINER,
		        ContentModel.ASSOC_MEMBER,
		        new JavaBehaviour(this, "onCreateChildAssociation", NotificationFrequency.TRANSACTION_COMMIT)
		        );
		
	}
@Override
	public void onCreateChildAssociation(ChildAssociationRef arg0, boolean arg1) {
		//do your magic
	}
}