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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.tuscany.sca.implementation.bpel.ode;
import java.util.concurrent.Callable;
import javax.wsdl.Part;
import javax.xml.namespace.QName;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.ode.bpel.iapi.Message;
import org.apache.ode.bpel.iapi.MessageExchange;
import org.apache.ode.bpel.iapi.PartnerRoleMessageExchange;
import org.apache.ode.bpel.iapi.Scheduler;
import org.apache.ode.utils.DOMUtils;
import org.apache.tuscany.sca.interfacedef.Operation;
import org.apache.tuscany.sca.interfacedef.wsdl.WSDLInterface;
import org.apache.tuscany.sca.runtime.RuntimeComponent;
import org.apache.tuscany.sca.runtime.RuntimeComponentReference;
import org.apache.tuscany.sca.runtime.RuntimeWire;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
/**
* Helper Class to handle invocation to Tuscany Component References
*
* @version $Rev$ $Date$
*/
public class ODEExternalService {
protected final Log __log = LogFactory.getLog(getClass());
private EmbeddedODEServer _server;
private Scheduler _sched;
public ODEExternalService(EmbeddedODEServer server) {
this._server = server;
this._sched = _server.getScheduler();
}
public void invoke(final PartnerRoleMessageExchange partnerRoleMessageExchange) {
boolean isTwoWay =
partnerRoleMessageExchange.getMessageExchangePattern() == org.apache.ode.bpel.iapi.MessageExchange.MessageExchangePattern.REQUEST_RESPONSE;
if (isTwoWay) {
// Defer the invoke until the transaction commits.
_sched.registerSynchronizer(new Scheduler.Synchronizer() {
public void beforeCompletion() {
}
public void afterCompletion(boolean success) {
// If the TX is rolled back, then we don't send the request.
if (!success)
return;
// The invocation must happen in a separate thread, holding
// on the afterCompletion
// blocks other operations that could have been listed there
// as well.
_server.getExecutor().submit(new Callable<Object>() {
public Object call() throws Exception {
try {
// do execution
if(! (partnerRoleMessageExchange.getChannel() instanceof TuscanyPRC)) {
throw new IllegalArgumentException("Channel should be an instance of TuscanyPRC");
}
TuscanyPRC channel = (TuscanyPRC) partnerRoleMessageExchange.getChannel();
RuntimeComponent tuscanyRuntimeComponent = _server.getTuscanyRuntimeComponent(channel.getProcessName());
RuntimeComponentReference runtimeComponentReference =
(RuntimeComponentReference)tuscanyRuntimeComponent.getReferences().get(0);
RuntimeWire runtimeWire =
runtimeComponentReference.getRuntimeWire(runtimeComponentReference.getBindings().get(0));
// convert operations
Operation operation =
findOperation(partnerRoleMessageExchange.getOperation().getName(), runtimeComponentReference);
/*
This is how a request looks like (payload is wrapped with extra info)
<?xml version="1.0" encoding="UTF-8"?>
<message>
<parameters>
<getGreetings xmlns="http://greetings">
<message xmlns="http://helloworld">Luciano</message>
</getGreetings>
</parameters>
</message>
*/
Element msg = partnerRoleMessageExchange.getRequest().getMessage();
if (msg != null) {
String xml = DOMUtils.domToString(msg);
String payload =
DOMUtils.domToString(getPayload(partnerRoleMessageExchange.getRequest()));
if(__log.isDebugEnabled()) {
__log.debug("Starting invocation of SCA Reference");
__log.debug(">>> Original message: " + xml);
__log.debug(">>> Payload: " + payload);
}
Object[] args = new Object[] {getPayload(partnerRoleMessageExchange.getRequest())};
Object result = null;
boolean success = false;
try {
result = runtimeWire.invoke(operation, args);
success = true;
} catch (Exception e) {
partnerRoleMessageExchange.replyWithFailure(MessageExchange.FailureType.OTHER,
e.getMessage(),
null);
}
if(__log.isDebugEnabled()) {
__log.debug("SCA Reference invocation finished");
__log.debug(">>> Result : " + DOMUtils.domToString((Element)result));
}
if (!success) {
return null;
}
// two way invocation
// process results based on type of message
// invocation
// Message response =
// createResponseMessage(partnerRoleMessageExchange,
// (Element) result);
// partnerRoleMessageExchange.reply(response);
replyTwoWayInvocation(partnerRoleMessageExchange.getMessageExchangeId(),
operation,
(Element)result);
}
} catch (Throwable t) {
// some error
String errmsg =
"Error sending message (mex=" + partnerRoleMessageExchange + "): " + t.getMessage();
__log.error(errmsg, t);
/*replyWithFailure(partnerRoleMessageExchange.getMessageExchangeId(),
MessageExchange.FailureType.COMMUNICATION_ERROR,
errmsg,
null);*/
}
return null;
}
});
}
});
partnerRoleMessageExchange.replyAsync();
} else {
/** one-way case * */
_server.getExecutor().submit(new Callable<Object>() {
public Object call() throws Exception {
// do reply
// operationClient.execute(false);
return null;
}
});
partnerRoleMessageExchange.replyOneWayOk();
}
}
/**
* Find the SCA Reference operation
*
* @param operationName
* @param runtimeComponentReference
* @return
*/
private Operation findOperation(String operationName, RuntimeComponentReference runtimeComponentReference) {
Operation reseultOperation = null;
for(Operation operation : runtimeComponentReference.getInterfaceContract().getInterface().getOperations()) {
if (operationName.equalsIgnoreCase(operation.getName())) {
reseultOperation = operation;
break;
}
}
return reseultOperation;
}
/**
* Get paylod from a given ODEMessage
* @param odeMessage
* @return
*/
private Element getPayload(Message odeMessage) {
Element payload = null;
Element parameters = odeMessage.getPart("parameters");
if (parameters != null && parameters.hasChildNodes()) {
payload = (Element)parameters.getFirstChild();
}
return payload;
}
private void replyTwoWayInvocation(final String odeMexId, final Operation operation, final Element result) {
// ODE MEX needs to be invoked in a TX.
try {
_server.getScheduler().execIsolatedTransaction(new Callable<Void>() {
public Void call() throws Exception {
PartnerRoleMessageExchange odeMex = null;
try {
odeMex = (PartnerRoleMessageExchange)_server.getBpelServer().getEngine().getMessageExchange(odeMexId);
if (odeMex != null) {
Message response = createResponseMessage(odeMex, operation, (Element)result);
odeMex.reply(response);
}
} catch (Exception ex) {
String errmsg = "Unable to process response: " + ex.getMessage();
if (odeMex != null) {
odeMex.replyWithFailure(MessageExchange.FailureType.OTHER, errmsg, null);
}
}
return null;
}
});
} catch (Exception ex) {
ex.printStackTrace();
}
}
private Message createResponseMessage(PartnerRoleMessageExchange partnerRoleMessageExchange,
Operation operation,
Element invocationResult) {
Document dom = DOMUtils.newDocument();
String operationName = operation.getName();
Part bpelOperationOutputPart =
(Part)((WSDLInterface)operation.getInterface()).getPortType().getOperation(operationName, null, null)
.getOutput().getMessage().getParts().values().iterator().next();
Element contentMessage = dom.createElement("message");
Element contentPart = dom.createElement(bpelOperationOutputPart.getName());
contentPart.appendChild(dom.importNode(invocationResult, true));
contentMessage.appendChild(contentPart);
dom.appendChild(contentMessage);
if(__log.isDebugEnabled()) {
__log.debug("Creating result message:");
__log.debug(">>>" + DOMUtils.domToString(dom.getDocumentElement()));
}
QName id = partnerRoleMessageExchange.getOperation().getOutput().getMessage().getQName();
Message response = partnerRoleMessageExchange.createMessage(id);
response.setMessage(dom.getDocumentElement());
return response;
}
}
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