001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    package org.apache.camel.processor.interceptor;
018    
019    import java.util.List;
020    
021    import org.apache.camel.CamelContext;
022    import org.apache.camel.Processor;
023    import org.apache.camel.model.ProcessorDefinition;
024    import org.apache.camel.spi.InterceptStrategy;
025    
026    /**
027     * An interceptor strategy for delaying routes.
028     */
029    public class Delayer implements InterceptStrategy {
030    
031        private boolean enabled = true;
032        private final long delay;
033    
034        public Delayer(long delay) {
035            this.delay = delay;
036        }
037    
038        /**
039         * A helper method to return the Delayer instance for a given {@link org.apache.camel.CamelContext} if one is enabled
040         *
041         * @param context the camel context the delayer is connected to
042         * @return the delayer or null if none can be found
043         */
044        public static Delayer getDelayer(CamelContext context) {
045            List<InterceptStrategy> list = context.getInterceptStrategies();
046            for (InterceptStrategy interceptStrategy : list) {
047                if (interceptStrategy instanceof Delayer) {
048                    return (Delayer)interceptStrategy;
049                }
050            }
051            return null;
052        }
053    
054        public Processor wrapProcessorInInterceptors(CamelContext context, ProcessorDefinition<?> definition,
055                                                     Processor target, Processor nextTarget) throws Exception {
056            return new DelayInterceptor(definition, target, this);
057        }
058    
059        public boolean isEnabled() {
060            return enabled;
061        }
062    
063        public void setEnabled(boolean enabled) {
064            this.enabled = enabled;
065        }
066    
067        public long getDelay() {
068            return delay;
069        }
070    
071        @Override
072        public String toString() {
073            return "Delayer[" + delay + "]";
074        }
075    }