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 */
017package org.apache.camel.processor.interceptor;
018
019import org.apache.camel.AsyncCallback;
020import org.apache.camel.CamelContext;
021import org.apache.camel.Exchange;
022import org.apache.camel.Processor;
023import org.apache.camel.model.ProcessorDefinition;
024import org.apache.camel.processor.DelegateAsyncProcessor;
025import org.apache.camel.spi.Debugger;
026import org.apache.camel.spi.InterceptStrategy;
027import org.apache.camel.util.StopWatch;
028
029/**
030 * A debug interceptor to notify {@link Debugger} with {@link Exchange}s being processed.
031 *
032 * @version 
033 */
034public class Debug implements InterceptStrategy {
035
036    private final Debugger debugger;
037
038    public Debug(Debugger debugger) {
039        this.debugger = debugger;
040    }
041
042    public Processor wrapProcessorInInterceptors(final CamelContext context, final ProcessorDefinition<?> definition,
043                                                 final Processor target, final Processor nextTarget) throws Exception {
044        return new DelegateAsyncProcessor(target) {
045            @Override
046            public boolean process(final Exchange exchange, final AsyncCallback callback) {
047                try {
048                    debugger.beforeProcess(exchange, target, definition);
049                } catch (Throwable e) {
050                    exchange.setException(e);
051                    callback.done(true);
052                    return true;
053                }
054
055                final StopWatch watch = new StopWatch();
056
057                return processor.process(exchange, new AsyncCallback() {
058                    public void done(boolean doneSync) {
059                        long diff = watch.taken();
060                        try {
061                            debugger.afterProcess(exchange, processor, definition, diff);
062                        } finally {
063                            // must notify original callback
064                            callback.done(doneSync);
065                        }
066                    }
067                });
068            }
069
070            @Override
071            public String toString() {
072                return "Debug[" + target + "]";
073            }
074        };
075    }
076}