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.impl.DefaultCamelContext;
024    import org.apache.camel.model.ProcessorType;
025    import org.apache.camel.spi.InterceptStrategy;
026    
027    /**
028     * An interceptor strategy for delaying routes.
029     */
030    public class Delayer implements InterceptStrategy {
031    
032        private boolean enabled = true;
033        private long delay;
034    
035        public Delayer() {
036        }
037    
038        public Delayer(long delay) {
039            this.delay = delay;
040        }
041    
042        /**
043         * A helper method to return the Delayer instance for a given {@link org.apache.camel.CamelContext} if one is enabled
044         *
045         * @param context the camel context the delayer is connected to
046         * @return the delayer or null if none can be found
047         */
048        public static DelayInterceptor getDelayer(CamelContext context) {
049            if (context instanceof DefaultCamelContext) {
050                DefaultCamelContext defaultCamelContext = (DefaultCamelContext) context;
051                List<InterceptStrategy> list = defaultCamelContext.getInterceptStrategies();
052                for (InterceptStrategy interceptStrategy : list) {
053                    if (interceptStrategy instanceof DelayInterceptor) {
054                        return (DelayInterceptor)interceptStrategy;
055                    }
056                }
057            }
058            return null;
059        }
060    
061        public Processor wrapProcessorInInterceptors(ProcessorType processorType, Processor target)
062            throws Exception {
063            DelayInterceptor delayer = new DelayInterceptor(processorType, target, this);
064            return delayer;
065        }
066    
067        public boolean isEnabled() {
068            return enabled;
069        }
070    
071        public void setEnabled(boolean enabled) {
072            this.enabled = enabled;
073        }
074    
075        public long getDelay() {
076            return delay;
077        }
078    
079        public void setDelay(long delay) {
080            this.delay = delay;
081        }
082    }