/*
* Copyright 2013 Red Hat Inc. and/or its affiliates and other contributors.
*
* Licensed 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.switchyard.component.camel.mqtt.deploy;
import javax.xml.namespace.QName;
import org.apache.camel.Exchange;
import org.apache.camel.Processor;
import org.apache.camel.model.RouteDefinition;
import org.switchyard.ServiceDomain;
import org.switchyard.common.camel.SwitchYardCamelContext;
import org.switchyard.common.type.Classes;
import org.switchyard.component.camel.common.CamelConstants;
import org.switchyard.component.camel.common.handler.InboundHandler;
import org.switchyard.component.camel.common.handler.MessageComposerProcessor;
import org.switchyard.component.camel.common.handler.OperationSelectorProcessor;
import org.switchyard.component.camel.mqtt.model.CamelMqttBindingModel;
import org.switchyard.runtime.event.ExchangeCompletionEvent;
/**
* Inbound handler for MQTT binding. Set applicationContextClassLoader in CamelContext as a TCCL
* as MQTT consumer runs with other class loader, causes issues. See https://issues.jboss.org/browse/SWITCHYARD-2220
*/
public class CamelMqttInboundHandler extends InboundHandler<CamelMqttBindingModel> {
private static final String ORIGINAL_CLASS_LOADER = "org.switchyard.component.camel.mqtt.deploy.CamelMqttInboundHandler.originalClassLoader";
/**
* Sole constructor.
*
* @param camelBindingModel The CamelBindingModel.
* @param camelContext The camel context instance.
* @param serviceName The target service name.
* @param domain the service domain.
*/
public CamelMqttInboundHandler(CamelMqttBindingModel camelBindingModel,
SwitchYardCamelContext camelContext, QName serviceName, ServiceDomain domain) {
super(camelBindingModel, camelContext, serviceName, domain);
}
@Override
protected RouteDefinition createRouteDefinition() {
final RouteDefinition route = new RouteDefinition();
route.routeId(getRouteId()).from(getComponentUri().toString());
addTransactionPolicy(route)
.doTry()
// SWITCHYARD-2220 - MQTT consumer needs TCCL to be set manually
.process(new Processor() {
@Override
public void process(Exchange exchange) throws Exception {
ClassLoader appClassLoader = exchange.getContext().getApplicationContextClassLoader();
ClassLoader origCl = Classes.setTCCL(appClassLoader);
exchange.setProperty(ORIGINAL_CLASS_LOADER, origCl);
}
})
.setProperty(ExchangeCompletionEvent.GATEWAY_NAME).simple(getBindingModel().getName(), String.class)
.setProperty(CamelConstants.APPLICATION_NAMESPACE).constant(getServiceName().getNamespaceURI())
.process(new MessageComposerProcessor(getBindingModel()))
.process(new OperationSelectorProcessor(getServiceName(), getBindingModel()))
.to(getSwitchyardEndpointUri())
.doFinally()
.process(new Processor() {
@Override
public void process(Exchange exchange) throws Exception {
ClassLoader origCl = exchange.getProperty(ORIGINAL_CLASS_LOADER, ClassLoader.class);
if (origCl != null) {
Classes.setTCCL(origCl);
}
}
});
return route;
}
}