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The Core Camel Java DSL based router
/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.camel.impl;
import org.apache.camel.NoFactoryAvailableException;
import org.apache.camel.Processor;
import org.apache.camel.model.ProcessorDefinition;
import org.apache.camel.spi.FactoryFinder;
import org.apache.camel.spi.ProcessorFactory;
import org.apache.camel.spi.RouteContext;
/**
* Default {@link ProcessorFactory} that supports using 3rd party Camel components to implement the EIP {@link Processor}.
*
* The component should use the {@link FactoryFinder} SPI to specify a file with the name of the EIP model in the
* directory of {@link #RESOURCE_PATH}. The file should contain a property with key class that refers
* to the name of the {@link ProcessorFactory} the Camel component implement, which gets called for creating
* the {@link Processor}s for the EIP.
*
* The Hystrix EIP is such an example where {@link org.apache.camel.model.HystrixDefinition} is implemented
* in the camel-hystrix component.
*/
public class DefaultProcessorFactory implements ProcessorFactory {
public static final String RESOURCE_PATH = "META-INF/services/org/apache/camel/model/";
@Override
public Processor createChildProcessor(RouteContext routeContext, ProcessorDefinition definition, boolean mandatory) throws Exception {
String name = definition.getClass().getSimpleName();
FactoryFinder finder = routeContext.getCamelContext().getFactoryFinder(RESOURCE_PATH);
try {
if (finder != null) {
Object object = finder.newInstance(name);
if (object != null && object instanceof ProcessorFactory) {
ProcessorFactory pc = (ProcessorFactory) object;
return pc.createChildProcessor(routeContext, definition, mandatory);
}
}
} catch (NoFactoryAvailableException e) {
// ignore there is no custom factory
}
return null;
}
@Override
public Processor createProcessor(RouteContext routeContext, ProcessorDefinition definition) throws Exception {
String name = definition.getClass().getSimpleName();
FactoryFinder finder = routeContext.getCamelContext().getFactoryFinder(RESOURCE_PATH);
try {
if (finder != null) {
Object object = finder.newInstance(name);
if (object != null && object instanceof ProcessorFactory) {
ProcessorFactory pc = (ProcessorFactory) object;
return pc.createProcessor(routeContext, definition);
}
}
} catch (NoFactoryAvailableException e) {
// ignore there is no custom factory
}
return null;
}
}