Java tutorial
/* * Copyright 2015 JAXIO http://www.jaxio.com * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.jaxio.celerio.aspects; import org.aspectj.lang.annotation.Aspect; import org.aspectj.lang.annotation.Before; import org.springframework.stereotype.Service; @Service @Aspect public class ForbiddenWhenBuildingAspect { private boolean isBuilding = true; @Before("@annotation(annotation)") public void forbidden(ForbiddenWhenBuilding annotation) { checkNotForbidden(); } public void checkNotForbidden() { if (isBuilding) { IllegalStateException ise = new IllegalStateException( "Called a " + ForbiddenWhenBuilding.class.getSimpleName() + " method while building"); ise.printStackTrace(); throw ise; } } public void buildingDone() { isBuilding = false; } }