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.model; 018 019import java.util.ArrayList; 020import java.util.List; 021 022import javax.xml.bind.annotation.XmlAccessType; 023import javax.xml.bind.annotation.XmlAccessorType; 024import javax.xml.bind.annotation.XmlRootElement; 025import javax.xml.bind.annotation.XmlTransient; 026 027import org.apache.camel.Predicate; 028import org.apache.camel.Processor; 029import org.apache.camel.spi.AsPredicate; 030import org.apache.camel.spi.Metadata; 031 032/** 033 * Intercepts a message at each step in the route 034 */ 035@Metadata(label = "configuration") 036@XmlRootElement(name = "intercept") 037@XmlAccessorType(XmlAccessType.FIELD) 038public class InterceptDefinition extends OutputDefinition<InterceptDefinition> { 039 @XmlTransient 040 protected final List<Processor> intercepted = new ArrayList<>(); 041 042 public InterceptDefinition() { 043 } 044 045 @Override 046 public String toString() { 047 return "Intercept[" + getOutputs() + "]"; 048 } 049 050 @Override 051 public String getShortName() { 052 return "intercept"; 053 } 054 055 @Override 056 public String getLabel() { 057 return "intercept"; 058 } 059 060 @Override 061 public boolean isAbstract() { 062 return true; 063 } 064 065 @Override 066 public boolean isTopLevelOnly() { 067 return true; 068 } 069 070 /** 071 * Applies this interceptor only if the given predicate is true 072 * 073 * @param predicate the predicate 074 * @return the builder 075 */ 076 public InterceptDefinition when(@AsPredicate Predicate predicate) { 077 WhenDefinition when = new WhenDefinition(predicate); 078 addOutput(when); 079 return this; 080 } 081 082 /** 083 * This method is <b>only</b> for handling some post configuration that is 084 * needed since this is an interceptor, and we have to do a bit of magic 085 * logic to fixup to handle predicates with or without proceed/stop set as 086 * well. 087 */ 088 public void afterPropertiesSet() { 089 if (getOutputs().size() == 0) { 090 // no outputs 091 return; 092 } 093 094 ProcessorDefinition<?> first = getOutputs().get(0); 095 if (first instanceof WhenDefinition) { 096 WhenDefinition when = (WhenDefinition)first; 097 // move this outputs to the when, expect the first one 098 // as the first one is the interceptor itself 099 for (int i = 1; i < outputs.size(); i++) { 100 ProcessorDefinition<?> out = outputs.get(i); 101 when.addOutput(out); 102 } 103 // remove the moved from the original output, by just keeping the 104 // first one 105 ProcessorDefinition<?> keep = outputs.get(0); 106 clearOutput(); 107 outputs.add(keep); 108 } 109 } 110 111 public List<Processor> getIntercepted() { 112 return intercepted; 113 } 114 115}