Java tutorial
/** * Copyright 2007-2010 ? * All rights reserved. * * This library is free software; you can redistribute it and/or modify it under the * terms of the GNU Lesser General Public License v3 as published by the Free Software * Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License along * with this library; if not, see http://www.gnu.org/licenses/lgpl.html. * */ package org.fireflow.service.callback; import java.util.HashMap; import java.util.List; import java.util.Map; import javax.annotation.Resource; import javax.script.ScriptException; import javax.xml.namespace.QName; import javax.xml.parsers.ParserConfigurationException; import javax.xml.transform.Source; import javax.xml.transform.Transformer; import javax.xml.transform.TransformerException; import javax.xml.transform.TransformerFactory; import javax.xml.transform.dom.DOMResult; import javax.xml.transform.dom.DOMSource; import javax.xml.ws.Provider; import javax.xml.ws.Service; import javax.xml.ws.ServiceMode; import javax.xml.ws.WebServiceContext; import javax.xml.ws.WebServiceException; import javax.xml.ws.WebServiceProvider; import org.apache.commons.lang.StringUtils; import org.fireflow.client.WorkflowQuery; import org.fireflow.client.WorkflowSession; import org.fireflow.client.WorkflowSessionFactory; import org.fireflow.client.WorkflowStatement; import org.fireflow.client.impl.WorkflowSessionLocalImpl; import org.fireflow.client.query.Restrictions; import org.fireflow.engine.context.RuntimeContext; import org.fireflow.engine.entity.runtime.ActivityInstance; import org.fireflow.engine.entity.runtime.ActivityInstanceProperty; import org.fireflow.engine.entity.runtime.ActivityInstanceState; import org.fireflow.engine.entity.runtime.ProcessInstance; import org.fireflow.engine.exception.InvalidOperationException; import org.fireflow.engine.exception.WorkflowProcessNotFoundException; import org.fireflow.engine.modules.instancemanager.ActivityInstanceManager; import org.fireflow.engine.modules.ousystem.impl.FireWorkflowSystem; import org.fireflow.engine.modules.script.ScriptContextVariableNames; import org.fireflow.engine.modules.script.ScriptEngineHelper; import org.fireflow.model.InvalidModelException; import org.fireflow.model.binding.Assignment; import org.fireflow.model.binding.ServiceBinding; import org.fireflow.model.data.Expression; import org.firesoa.common.schema.DOMInitializer; import org.springframework.transaction.TransactionException; import org.springframework.transaction.TransactionStatus; import org.springframework.transaction.support.TransactionCallback; import org.springframework.transaction.support.TransactionTemplate; import org.w3c.dom.Document; /** * ?WebService * @author ? nychen2000@163.com * Fire Workflow www.firesoa.com www.fireflow.org * */ @WebServiceProvider() @ServiceMode(value = Service.Mode.PAYLOAD) public class ProcessServiceProvider implements Provider<Source> { protected static final TransformerFactory transformerFactory = TransformerFactory.newInstance(); @Resource protected WebServiceContext wsContext; protected RuntimeContext workflowRuntimeContext = null; protected CallbackService callbackService = null; protected ServiceBinding serviceBinding = null; protected TransactionTemplate transactionTemplate = null; protected boolean startNewProcess = false; protected String processId = null; protected String processType = null; // protected Integer processVersion = null; /** * @return the transactionTemplate */ public TransactionTemplate getTransactionTemplate() { return transactionTemplate; } /** * @param transactionTemplate the transactionTemplate to set */ public void setTransactionTemplate(TransactionTemplate transactionTemplate) { this.transactionTemplate = transactionTemplate; } public ServiceBinding getServiceBinding() { return serviceBinding; } public void setServiceBinding(ServiceBinding serviceBinding) { this.serviceBinding = serviceBinding; } public void setWorkflowRuntimeContext(RuntimeContext ctx) { this.workflowRuntimeContext = ctx; } public RuntimeContext getWorkflowRuntimeContext() { return this.workflowRuntimeContext; } public CallbackService getCallbackService() { return callbackService; } public void setCallbackService(CallbackService callbackService) { this.callbackService = callbackService; } public ProcessServiceProvider() { } public boolean isStartNewProcess() { return startNewProcess; } public void setStartNewProcess(boolean startNewProcess) { this.startNewProcess = startNewProcess; } public String getProcessId() { return processId; } public void setProcessId(String processId) { this.processId = processId; } public String getProcessType() { return processType; } public void setProcessType(String processType) { this.processType = processType; } // public Integer getProcessVersion() { // return processVersion; // } // public void setProcessVersion(Integer processVersion) { // this.processVersion = processVersion; // } public Source invoke(Source request) { Expression correlation = callbackService.getCorrelation(); final QName responseRootElementQName = new QName(callbackService.getTargetNamespaceUri(), this.serviceBinding.getOperationName() + "Response"); //?? /* try{ Transformer transformer = transformerFactory.newTransformer(); transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8"); transformer.setOutputProperty(OutputKeys.INDENT, "yes"); transformer.setOutputProperty( "{http://xml.apache.org/xslt}indent-amount", "2"); ByteArrayOutputStream outputStream = new ByteArrayOutputStream(); // transformer.transform() XML Source? Result transformer.transform(request, new StreamResult( outputStream)); System.out.println( outputStream.toString()); }catch(Exception e){ e.printStackTrace(); } */ final Document requestDOM; try { Transformer transformer = transformerFactory.newTransformer(); DOMResult domResult = new DOMResult(); transformer.transform(request, domResult); requestDOM = (Document) domResult.getNode();//reuqestDOM } catch (TransformerException e) { throw new WebServiceException("Can NOT transform request to DOM.", e); } final WorkflowSession session = WorkflowSessionFactory.createWorkflowSession(workflowRuntimeContext, FireWorkflowSystem.getInstance()); if (!startNewProcess) {//? if (correlation == null || StringUtils.isEmpty(correlation.getBody())) { throw new WebServiceException( "The correlation can NOT be empty; the callbackservice is " + callbackService.getName()); } //1?serviceIdservice versioncandidate activityInstance WorkflowQuery<ActivityInstance> query = session.createWorkflowQuery(ActivityInstance.class); List<ActivityInstance> candidates = query .add(Restrictions.eq(ActivityInstanceProperty.SERVICE_ID, callbackService.getId())) .add(Restrictions.eq(ActivityInstanceProperty.SERVICE_VERSION, callbackService.getVersion())) .add(Restrictions.eq(ActivityInstanceProperty.STATE, ActivityInstanceState.RUNNING)).list(); //2??correlation //correlationbool?processVars.var1==xpath(requestDom,'method1Request/id') ProcessInstance theProcessInstance = null; ActivityInstance theActivityInstance = null; if (candidates != null && candidates.size() > 0) { for (ActivityInstance activityInstance : candidates) { ProcessInstance processInstance = activityInstance.getProcessInstance(session); ((WorkflowSessionLocalImpl) session).setCurrentProcessInstance(processInstance); ((WorkflowSessionLocalImpl) session).setCurrentActivityInstance(activityInstance); Map<String, Object> varContext = ScriptEngineHelper.fulfillScriptContext(session, workflowRuntimeContext, processInstance, activityInstance); varContext.put(ScriptContextVariableNames.INPUTS, requestDOM); Object result = ScriptEngineHelper.evaluateExpression(workflowRuntimeContext, correlation, varContext); if (result != null && (result instanceof Boolean)) { if ((Boolean) result) { theActivityInstance = activityInstance; theProcessInstance = processInstance; break; } } } } final ActivityInstance theMatchedActivityInstance = theActivityInstance;//?activityInstance final ProcessInstance theMatchedProcessInstance = theProcessInstance; if (theMatchedActivityInstance != null) { //1?currentProcessInstanceCurrentActivityInstance ((WorkflowSessionLocalImpl) session).setCurrentActivityInstance(theMatchedActivityInstance); ((WorkflowSessionLocalImpl) session).setCurrentProcessInstance(theMatchedProcessInstance); try { this.transactionTemplate.execute(new TransactionCallback() { public Object doInTransaction(TransactionStatus status) { //2???? List<Assignment> inputAssignments_ = serviceBinding.getInputAssignments(); Map<String, Object> scriptContext = new HashMap<String, Object>(); scriptContext.put(ScriptContextVariableNames.INPUTS, requestDOM); try { ScriptEngineHelper.assignOutputToVariable(session, workflowRuntimeContext, theMatchedProcessInstance, theMatchedActivityInstance, inputAssignments_, scriptContext); } catch (ScriptException e) { throw new RuntimeException( "Can NOT assign inputs to process instance varialbes,the callback service is " + callbackService.getName(), e); } //3?closeActivity? ActivityInstanceManager actInstMgr = workflowRuntimeContext.getEngineModule( ActivityInstanceManager.class, theMatchedProcessInstance.getProcessType()); actInstMgr.onServiceCompleted(session, theMatchedActivityInstance); return null; } }); } catch (TransactionException e) { throw new WebServiceException(e); } //4? try { Map<String, Object> allTheVars = ScriptEngineHelper.fulfillScriptContext(session, workflowRuntimeContext, theMatchedProcessInstance, theMatchedActivityInstance); List<Assignment> outputAssignments = serviceBinding.getOutputAssignments(); Document doc = DOMInitializer.generateDocument(callbackService.getXmlSchemaCollection(), responseRootElementQName); allTheVars.put(ScriptContextVariableNames.OUTPUTS, doc); Map<String, Object> tmp = ScriptEngineHelper.resolveAssignments(workflowRuntimeContext, outputAssignments, allTheVars); Document resultDOM = (Document) tmp.get(ScriptContextVariableNames.OUTPUTS); return new DOMSource(resultDOM); } catch (ScriptException e) { throw new WebServiceException( "Can NOT assign process instance varialbes to output,the callback service is " + callbackService.getName(), e); } catch (ParserConfigurationException e) { throw new WebServiceException( "Can NOT init output DOM,the callback service is " + callbackService.getName(), e); } } else { throw new WebServiceException( "Process instance NOT found for the conditions as follows,service id='" + callbackService.getId() + "' and service version='" + callbackService.getVersion() + "' and correlation='" + correlation.getBody() + "'"); } } else {//?? //1????bizId final Map<String, Object> processVars; final String bizId; try { List<Assignment> inputAssignments_ = serviceBinding.getInputAssignments(); Map<String, Object> scriptContext = new HashMap<String, Object>(); scriptContext.put(ScriptContextVariableNames.INPUTS, requestDOM); Map<String, Object> temp = ScriptEngineHelper.resolveAssignments(workflowRuntimeContext, inputAssignments_, scriptContext); processVars = (Map<String, Object>) temp.get(ScriptContextVariableNames.PROCESS_VARIABLES); Map<String, Object> varContext = new HashMap<String, Object>(); varContext.put(ScriptContextVariableNames.INPUTS, requestDOM); Object result = ScriptEngineHelper.evaluateExpression(workflowRuntimeContext, correlation, varContext); bizId = result == null ? null : result.toString(); } catch (ScriptException e) { throw new WebServiceException( "Can NOT assign inputs to process instance varialbes,the callback service is " + callbackService.getName(), e); } //2??? ProcessInstance processInstance = null; try { processInstance = (ProcessInstance) transactionTemplate.execute(new TransactionCallback() { public Object doInTransaction(TransactionStatus status) { WorkflowStatement stmt = session.createWorkflowStatement(processType); ProcessInstance procInst = null; try { procInst = stmt.startProcess(processId, bizId, processVars); } catch (InvalidModelException e1) { throw new RuntimeException("Start process instance error! The callback service is " + callbackService.getName() + "; the process is " + processId, e1); } catch (WorkflowProcessNotFoundException e1) { throw new RuntimeException("Start process instance error! The callback service is " + callbackService.getName() + "; the process is " + processId, e1); } catch (InvalidOperationException e1) { throw new RuntimeException("Start process instance error! The callback service is " + callbackService.getName() + "; the process is " + processId, e1); } return procInst; } }); } catch (TransactionException e) { throw new WebServiceException(e); } //3? try { Map<String, Object> allTheVars = ScriptEngineHelper.fulfillScriptContext(session, workflowRuntimeContext, processInstance, null); List<Assignment> outputAssignments = serviceBinding.getOutputAssignments(); // ?DOM Document doc = DOMInitializer.generateDocument(callbackService.getXmlSchemaCollection(), responseRootElementQName); allTheVars.put(ScriptContextVariableNames.OUTPUTS, doc); Map<String, Object> tmp = ScriptEngineHelper.resolveAssignments(workflowRuntimeContext, outputAssignments, allTheVars); Document resultDOM = (Document) tmp.get(ScriptContextVariableNames.OUTPUTS); return new DOMSource(resultDOM); } catch (ScriptException e) { throw new WebServiceException( "Can NOT assign process instance varialbes to output,the callback service is " + callbackService.getName(), e); } catch (ParserConfigurationException e) { throw new WebServiceException( "Can NOT init output DOM,the callback service is " + callbackService.getName(), e); } } } }