/* * Copyright 2014 dc-square GmbH * * 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.hivemq.spi.aop.cache; import java.lang.annotation.Documented; import java.lang.annotation.Retention; import java.lang.annotation.Target; import java.util.concurrent.TimeUnit; import static java.lang.annotation.ElementType.METHOD; import static java.lang.annotation.RetentionPolicy.RUNTIME; /** * Caches the return value of a method for a specific time. It takes the parameters * of the method into account, when deciding if this method has already been cached. * Very useful for expensive methods * (like database lookups) which are called regularly. * <p/> * Only works on objects created by Guice. * * @author Christian Goetz * @since 1.4 */ @Documented @Retention(RUNTIME) @Target(METHOD) public @interface Cached { /** * The total time how long the return value of this method should be cached */ long timeToLive(); /** * The {@link TimeUnit} for the timeToLive. Defaults to Milliseconds */ TimeUnit timeUnit() default TimeUnit.MILLISECONDS; }