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/*
* 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.servicemix.sca.handler;
import java.io.ByteArrayOutputStream;
import java.lang.reflect.Method;
import javax.jbi.messaging.DeliveryChannel;
import javax.jbi.messaging.ExchangeStatus;
import javax.jbi.messaging.InOut;
import javax.jbi.messaging.NormalizedMessage;
import javax.xml.bind.JAXBContext;
import org.apache.servicemix.jbi.jaxp.StringSource;
import org.apache.servicemix.sca.ScaServiceUnit;
import org.apache.servicemix.sca.assembly.JbiBinding;
import org.apache.tuscany.model.assembly.ExternalService;
public class ExternalJbiServiceClient {
private ExternalService externalService;
private JbiBinding jbiBinding;
private ScaServiceUnit serviceUnit;
/**
* Constructs a new ExternalWebServiceClient.
*
* @param externalService
* @param wsBinding
*/
public ExternalJbiServiceClient(ExternalService externalService) {
this.serviceUnit = ScaServiceUnit.getCurrentScaServiceUnit();
this.externalService = externalService;
this.jbiBinding = (JbiBinding) this.externalService.getBindings().get(0);
}
/**
* Invoke an operation on the external Web service.
*
* @param method
* @param args
* @return
*/
public Object invoke(Method method, Object[] args) {
if (args == null || args.length != 1) {
throw new IllegalStateException("args should have exactly one object");
}
try {
Object payload = args[0];
Class inputClass = method.getParameterTypes()[0];
Class outputClass = method.getReturnType();
JAXBContext context = JAXBContext.newInstance(inputClass, outputClass);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
context.createMarshaller().marshal(payload, baos);
DeliveryChannel channel = serviceUnit.getComponent().getComponentContext().getDeliveryChannel();
// TODO: in-only case ?
// TODO: interface based routing ?
// TODO: explicit endpoint selection ?
InOut inout = channel.createExchangeFactory().createInOutExchange();
inout.setService(jbiBinding.getServiceName());
NormalizedMessage in = inout.createMessage();
inout.setInMessage(in);
in.setContent(new StringSource(baos.toString()));
boolean sent = channel.sendSync(inout);
// TODO: check for error ?
NormalizedMessage out = inout.getOutMessage();
Object response = context.createUnmarshaller().unmarshal(out.getContent());
inout.setStatus(ExchangeStatus.DONE);
channel.send(inout);
return response;
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}
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