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.impl; 018 019import org.apache.camel.NoFactoryAvailableException; 020import org.apache.camel.Processor; 021import org.apache.camel.model.ProcessorDefinition; 022import org.apache.camel.spi.FactoryFinder; 023import org.apache.camel.spi.ProcessorFactory; 024import org.apache.camel.spi.RouteContext; 025 026/** 027 * Default {@link ProcessorFactory} that supports using 3rd party Camel components to implement the EIP {@link Processor}. 028 * <p/> 029 * The component should use the {@link FactoryFinder} SPI to specify a file with the name of the EIP model in the 030 * directory of {@link #RESOURCE_PATH}. The file should contain a property with key <tt>class</tt> that refers 031 * to the name of the {@link ProcessorFactory} the Camel component implement, which gets called for creating 032 * the {@link Processor}s for the EIP. 033 * <p/> 034 * The Hystrix EIP is such an example where {@link org.apache.camel.model.HystrixDefinition} is implemented 035 * in the <tt>camel-hystrix</tt> component. 036 */ 037public class DefaultProcessorFactory implements ProcessorFactory { 038 039 public static final String RESOURCE_PATH = "META-INF/services/org/apache/camel/model/"; 040 041 @Override 042 public Processor createChildProcessor(RouteContext routeContext, ProcessorDefinition<?> definition, boolean mandatory) throws Exception { 043 String name = definition.getClass().getSimpleName(); 044 FactoryFinder finder = routeContext.getCamelContext().getFactoryFinder(RESOURCE_PATH); 045 try { 046 if (finder != null) { 047 Object object = finder.newInstance(name); 048 if (object instanceof ProcessorFactory) { 049 ProcessorFactory pc = (ProcessorFactory) object; 050 return pc.createChildProcessor(routeContext, definition, mandatory); 051 } 052 } 053 } catch (NoFactoryAvailableException e) { 054 // ignore there is no custom factory 055 } 056 057 return null; 058 } 059 060 @Override 061 public Processor createProcessor(RouteContext routeContext, ProcessorDefinition<?> definition) throws Exception { 062 String name = definition.getClass().getSimpleName(); 063 FactoryFinder finder = routeContext.getCamelContext().getFactoryFinder(RESOURCE_PATH); 064 try { 065 if (finder != null) { 066 Object object = finder.newInstance(name); 067 if (object instanceof ProcessorFactory) { 068 ProcessorFactory pc = (ProcessorFactory) object; 069 return pc.createProcessor(routeContext, definition); 070 } 071 } 072 } catch (NoFactoryAvailableException e) { 073 // ignore there is no custom factory 074 } 075 076 return null; 077 } 078}