diff options
Diffstat (limited to 'sca-java-2.x/tags/2.0.1-RC1/modules/implementation-bpel-runtime/src/main/java/org/apache/tuscany/sca/implementation/bpel/ode/provider/BPELInvoker.java')
| -rw-r--r-- | sca-java-2.x/tags/2.0.1-RC1/modules/implementation-bpel-runtime/src/main/java/org/apache/tuscany/sca/implementation/bpel/ode/provider/BPELInvoker.java | 286 |
1 files changed, 286 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0.1-RC1/modules/implementation-bpel-runtime/src/main/java/org/apache/tuscany/sca/implementation/bpel/ode/provider/BPELInvoker.java b/sca-java-2.x/tags/2.0.1-RC1/modules/implementation-bpel-runtime/src/main/java/org/apache/tuscany/sca/implementation/bpel/ode/provider/BPELInvoker.java new file mode 100644 index 0000000000..4a99fe705c --- /dev/null +++ b/sca-java-2.x/tags/2.0.1-RC1/modules/implementation-bpel-runtime/src/main/java/org/apache/tuscany/sca/implementation/bpel/ode/provider/BPELInvoker.java @@ -0,0 +1,286 @@ +/* + * 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.provider; + +import java.lang.reflect.InvocationTargetException; +import java.util.concurrent.Future; +import java.util.concurrent.TimeUnit; + +import javax.transaction.SystemException; +import javax.transaction.TransactionManager; +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.MyRoleMessageExchange; +import org.apache.ode.bpel.iapi.MessageExchange.Status; +import org.apache.ode.utils.DOMUtils; +import org.apache.ode.utils.GUID; +import org.apache.tuscany.sca.assembly.Base; +import org.apache.tuscany.sca.assembly.EndpointReference; +import org.apache.tuscany.sca.implementation.bpel.ode.EmbeddedODEServer; +import org.apache.tuscany.sca.interfacedef.Interface; +import org.apache.tuscany.sca.interfacedef.Operation; +import org.apache.tuscany.sca.interfacedef.wsdl.WSDLInterface; +import org.apache.tuscany.sca.invocation.Invoker; +import org.apache.tuscany.sca.invocation.Message; +import org.apache.tuscany.sca.runtime.RuntimeComponent; +import org.apache.tuscany.sca.runtime.RuntimeComponentService; +import org.w3c.dom.Document; +import org.w3c.dom.Element; + +/** + * Implements a target invoker for BPEL component implementations. + * + * The target invoker is responsible for dispatching invocations to the particular + * component implementation logic. In this example we are simply delegating the + * CRUD operation invocations to the corresponding methods on our fake + * resource manager. + * + * @version $Rev$ $Date$ + */ +public class BPELInvoker implements Invoker { + private final static long TIME_OUT = 10000L; + + protected final Log __log = LogFactory.getLog(getClass()); + + private EmbeddedODEServer odeServer; + private TransactionManager txMgr; + + private RuntimeComponentService service; + private Operation operation; + private QName bpelServiceName; + private String bpelOperationName; + private Part bpelOperationInputPart; + private Part bpelOperationOutputPart; + private RuntimeComponent component; + // Marks if this service has a callback interface + private Boolean isCallback = false; + private EndpointReference callbackEPR; + + public BPELInvoker(RuntimeComponent component, RuntimeComponentService service, Operation operation, + EmbeddedODEServer odeServer, TransactionManager txMgr) { + this.service = service; + this.component = component; + this.operation = operation; + this.bpelOperationName = operation.getName(); + this.odeServer = odeServer; + this.txMgr = txMgr; + this.isCallback = serviceHasCallback( service ); + + initializeInvocation(); + } // end method BPELInvoker + + private boolean serviceHasCallback( RuntimeComponentService service ) { + if(service.getInterfaceContract().getCallbackInterface() != null) return true; + return false; + } // end method serviceHasCallback + + private void initializeInvocation() { + + __log.debug("Initializing BPELInvoker"); + + Interface interfaze = operation.getInterface(); + if(interfaze instanceof WSDLInterface){ + WSDLInterface wsdlInterface = null; + wsdlInterface = (WSDLInterface) interfaze; + + // Fetch the service name from the service object - including the componentURI guarantees a unique service name + String componentURI = component.getURI(); + bpelServiceName = new QName( Base.SCA11_TUSCANY_NS, componentURI + service.getName() ); + + bpelOperationInputPart = (Part) wsdlInterface.getPortType().getOperation(bpelOperationName,null,null).getInput().getMessage().getParts().values().iterator().next(); + bpelOperationOutputPart = (Part) wsdlInterface.getPortType().getOperation(bpelOperationName,null,null).getOutput().getMessage().getParts().values().iterator().next(); + } + } // end method initializeInvocation + + public Message invoke(Message msg) { + try { + if( isCallback ) { + // Extract the callback endpoint metadata + callbackEPR = msg.getFrom(); + } // end if + Object[] args = msg.getBody(); + Object resp = doTheWork(args); + msg.setBody(resp); + } catch (InvocationTargetException e) { + msg.setFaultBody(e.getCause()); + } + return msg; + } + + public Object doTheWork(Object[] args) throws InvocationTargetException { + Element response = null; + + if(! (operation.getInterface() instanceof WSDLInterface)) { + throw new InvocationTargetException(null,"Unsupported service contract"); + } + + org.apache.ode.bpel.iapi.MyRoleMessageExchange mex = null; + Future<?> onhold = null; + + //Process the BPEL process invocation + Long processID = 0L; + try { + txMgr.begin(); + mex = odeServer.getBpelServer().getEngine().createMessageExchange(new GUID().toString(), + bpelServiceName, + bpelOperationName); + //TODO - this will not be true for OneWay operations - need to handle those + mex.setProperty("isTwoWay", "true"); + onhold = mex.invoke(createInvocationMessage(mex, args)); + + txMgr.commit(); + // Deal with callback cases - store the callback metadata by process instance ID + if( isCallback ) { + processID = odeServer.getProcessIDFromMex(mex.getMessageExchangeId()); + // Store the callback metadata for this invocation + odeServer.saveCallbackMetadata( processID, service.getName(), callbackEPR ); + } // end if + } catch (Exception e) { + try { + txMgr.rollback(); + } catch (SystemException se) { + + } + throw new InvocationTargetException(e, "Error invoking BPEL process : " + e.getMessage()); + } // end try + + // Waiting until the reply is ready in case the engine needs to continue in a different thread + if (onhold != null) { + try { + //add timeout to avoid blocking when there is a exception/failure + onhold.get(TIME_OUT, TimeUnit.MILLISECONDS); + } catch (Exception e) { + throw new InvocationTargetException(e,"Error invoking BPEL process : " + e.getMessage()); + } // end try + } // end if + + //Process the BPEL invocation response + try { + txMgr.begin(); + // Reloading the mex in the current transaction, otherwise we can't + // be sure we have the "freshest" one. + mex = (MyRoleMessageExchange)odeServer.getBpelServer().getEngine().getMessageExchange(mex.getMessageExchangeId()); + + Status status = mex.getStatus(); + + switch (status) { + case FAULT: + if (__log.isDebugEnabled()) + __log.debug("Fault response message: " + mex.getFault()); + throw new ODEInvocationException("FAULT received from BPEL process : " + mex.getFault() + + " " + + mex.getFaultExplanation()); + case ASYNC: + case RESPONSE: + //process the method invocation result + response = processResponse(mex.getResponse().getMessage()); + if (__log.isDebugEnabled()) + __log.debug("Response message " + response); + break; + case FAILURE: + if (__log.isDebugEnabled()) + __log.debug("Failure response message: " + mex.getFault()); + break; + default: + throw new ODEInvocationException("FAILURE received from BPEL process : " + mex.getStatus() + " - " + mex.getFault()); + } // end switch + + txMgr.commit(); + // end of transaction two + } catch (Exception e) { + try { + txMgr.rollback(); + } catch (SystemException se) { + + } + throw new InvocationTargetException(e, "Error retrieving BPEL process invocation status : " + e.getMessage()); + } // end try + + // Cleanup the ODE MessageExchange object + //mex.release(); + + return response; + } + + /** + * Create BPEL Invocation message + * + * BPEL invocation message like : + * <message> + * <TestPart> + * <hello xmlns="http://tuscany.apache.org/implementation/bpel/example/helloworld.wsdl">Hello</hello> + * </TestPart> + * </message> + * @param args + * @return + */ + private org.apache.ode.bpel.iapi.Message createInvocationMessage(org.apache.ode.bpel.iapi.MyRoleMessageExchange mex, Object[] args) { + Document dom = DOMUtils.newDocument(); + + Element contentMessage = dom.createElement("message"); + Element contentPart = dom.createElement(bpelOperationInputPart.getName()); + Element payload = null; + + // TODO handle WSDL input messages with multiple Parts... + //TUSCANY-2321 - Properly handling Document or Element types + if(args[0] instanceof Document) { + payload = (Element) ((Document) args[0]).getFirstChild(); + } else { + payload = (Element) args[0]; + } + + contentPart.appendChild(dom.importNode(payload, true)); + contentMessage.appendChild(contentPart); + dom.appendChild(contentMessage); + + if (__log.isDebugEnabled()) { + __log.debug("Creating invocation message:"); + __log.debug(">> args.....: " + DOMUtils.domToString(payload)); + __log.debug(">> message..:" + DOMUtils.domToString(dom.getDocumentElement())); + } + + org.apache.ode.bpel.iapi.Message request = mex.createMessage(new QName("", "")); + request.setMessage(dom.getDocumentElement()); + + return request; + } + + /** + * Process BPEL response + * + * <message> + * <TestPart> + * <hello xmlns="http://tuscany.apache.org/implementation/bpel/example/helloworld.wsdl">World</hello> + * </TestPart> + * </message> + * + * @param response + * @return + */ + private Element processResponse(Element response) { + return (Element) DOMUtils.findChildByName(response, new QName("",bpelOperationOutputPart.getName())).getFirstChild(); + + // MJE, 12/06/2009 - changed to return the message without the PART wrapper element, since this element is not + // transmitted in the SOAP messages on the wire + } // end method processResponse +} // end class BPELInvoker |