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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;
import java.io.StringWriter;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.UndeclaredThrowableException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.jbi.component.ComponentContext;
import javax.jbi.messaging.DeliveryChannel;
import javax.jbi.messaging.ExchangeStatus;
import javax.jbi.messaging.MessageExchange;
import javax.jbi.messaging.NormalizedMessage;
import javax.jbi.messaging.MessageExchange.Role;
import javax.jbi.servicedesc.ServiceEndpoint;
import javax.xml.bind.JAXBContext;
import org.apache.servicemix.common.Endpoint;
import org.apache.servicemix.common.ExchangeProcessor;
import org.apache.servicemix.jbi.jaxp.StringSource;
import org.apache.tuscany.core.context.EntryPointContext;
import org.apache.tuscany.model.assembly.ConfiguredReference;
import org.apache.tuscany.model.assembly.ConfiguredService;
import org.apache.tuscany.model.assembly.EntryPoint;
/**
*
* @author gnodet
* @version $Revision$
* @org.apache.xbean.XBean element="endpoint" description="A sca endpoint"
*
*/
public class ScaEndpoint extends Endpoint implements ExchangeProcessor {
protected ServiceEndpoint activated;
protected EntryPoint entryPoint;
protected Map<Class, Method> methodMap;
protected JAXBContext jaxbContext;
protected DeliveryChannel channel;
public ScaEndpoint(EntryPoint entryPoint) {
this.entryPoint = entryPoint;
}
public Role getRole() {
return Role.PROVIDER;
}
public void activate() throws Exception {
logger = this.serviceUnit.getComponent().getLogger();
ComponentContext ctx = this.serviceUnit.getComponent().getComponentContext();
activated = ctx.activateEndpoint(service, endpoint);
channel = ctx.getDeliveryChannel();
// Get the target service
ConfiguredReference referenceValue = entryPoint.getConfiguredReference();
ConfiguredService targetServiceEndpoint = referenceValue.getTargetConfiguredServices().get(0);
// Get the business interface
Class serviceInterface = targetServiceEndpoint.getService().getServiceContract().getInterface();
List<Class> classes = new ArrayList<Class>();
methodMap = new HashMap<Class, Method>();
for (Method mth : serviceInterface.getMethods()) {
Class[] params = mth.getParameterTypes();
if (params.length != 1) {
throw new IllegalStateException("Supports only methods with one parameter");
}
methodMap.put(params[0], mth);
classes.add(mth.getReturnType());
classes.add(params[0]);
}
jaxbContext = JAXBContext.newInstance(classes.toArray(new Class[0]));
}
public void deactivate() throws Exception {
ServiceEndpoint ep = activated;
activated = null;
ComponentContext ctx = this.serviceUnit.getComponent().getComponentContext();
ctx.deactivateEndpoint(ep);
}
public ExchangeProcessor getProcessor() {
return this;
}
public void process(MessageExchange exchange) throws Exception {
if (exchange.getStatus() == ExchangeStatus.DONE) {
return;
} else if (exchange.getStatus() == ExchangeStatus.ERROR) {
return;
}
Object input = jaxbContext.createUnmarshaller().unmarshal(exchange.getMessage("in").getContent());
Method method = methodMap.get(input.getClass());
if (method == null) {
throw new IllegalStateException("Could not determine invoked web method");
}
boolean oneWay = method.getReturnType() == null;
Object output;
try {
EntryPointContext entryPointContext = (EntryPointContext) ((ScaServiceUnit) serviceUnit)
.getTuscanyRuntime().getModuleContext().getContext(entryPoint.getName());
InvocationHandler handler = (InvocationHandler) entryPointContext.getImplementationInstance();
output = handler.invoke(null, method, new Object[] { input });
} catch (UndeclaredThrowableException e) {
throw e;
} catch (RuntimeException e) {
throw e;
} catch (Error e) {
throw e;
} catch (Exception e) {
throw e;
} catch (Throwable e) {
throw new RuntimeException(e);
}
if (oneWay) {
exchange.setStatus(ExchangeStatus.DONE);
channel.send(exchange);
} else {
NormalizedMessage msg = exchange.createMessage();
exchange.setMessage(msg, "out");
StringWriter writer = new StringWriter();
jaxbContext.createMarshaller().marshal(output, writer);
msg.setContent(new StringSource(writer.toString()));
channel.send(exchange);
}
}
public void start() throws Exception {
}
public void stop() throws Exception {
}
}
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