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First cut of hooking Alfresco JavaScript into jBPM process definition.

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git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@3486 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261
This commit is contained in:
David Caruana
2006-08-11 18:01:56 +00:00
parent 17ab601380
commit cddf5ac2ab
4 changed files with 256 additions and 6 deletions
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9
source/java/org/alfresco/repo/jscript/RhinoScriptService.java
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@@ -38,6 +38,7 @@ import org.alfresco.service.namespace.QName;
import org.apache.log4j.Logger;
import org.mozilla.javascript.Context;
import org.mozilla.javascript.ImporterTopLevel;
import org.mozilla.javascript.NativeJavaObject;
import org.mozilla.javascript.Scriptable;
import org.mozilla.javascript.ScriptableObject;
@@ -252,6 +253,12 @@ public class RhinoScriptService implements ScriptService
// execute the script
Object result = cx.evaluateReader(scope, reader, "AlfrescoScript", 1, null);
// extract java object result if wrapped by rhinoscript
if (result != null && result.getClass().equals(NativeJavaObject.class))
{
result = Context.jsToJava(result, Object.class);
}
return result;
}
catch (Throwable err)
@@ -260,7 +267,7 @@ public class RhinoScriptService implements ScriptService
}
finally
{
cx.exit();
Context.exit();
if (logger.isDebugEnabled())
{

211
source/java/org/alfresco/repo/workflow/jbpm/AlfrescoJavaScript.java Normal file
View File

@@ -0,0 +1,211 @@
/*
* Copyright (C) 2005 Alfresco, Inc.
*
* Licensed under the Mozilla Public License version 1.1
* with a permitted attribution clause. You may obtain a
* copy of the License at
*
* http://www.alfresco.org/legal/license.txt
*
* 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.alfresco.repo.workflow.jbpm;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.alfresco.service.ServiceRegistry;
import org.alfresco.service.cmr.repository.ScriptService;
import org.dom4j.Element;
import org.jbpm.context.def.VariableAccess;
import org.jbpm.context.exe.ContextInstance;
import org.jbpm.graph.exe.ExecutionContext;
import org.jbpm.graph.exe.Token;
import org.jbpm.jpdl.xml.JpdlXmlReader;
import org.springframework.beans.factory.BeanFactory;
import org.xml.sax.InputSource;
/**
* A jBPM Action Handler for executing Alfresco Script
*
* The configuration of this action is as follows:
* <script language="javascript">
* <expression>
* the script to execute
* </expression>
* <variable name="watcha" access="write"/>
* </script>
*
* It's exactly the same as jBPM's own script configuration.
*
* @author davidc
*/
public class AlfrescoJavaScript extends JBPMSpringActionHandler
{
private static final long serialVersionUID = -2908748080671212745L;
private static JpdlXmlReader jpdlReader = new JpdlXmlReader((InputSource)null);
private ScriptService scriptService;
private Element script;
/* (non-Javadoc)
* @see org.alfresco.repo.workflow.jbpm.JBPMSpringActionHandler#initialiseHandler(org.springframework.beans.factory.BeanFactory)
*/
@Override
protected void initialiseHandler(BeanFactory factory)
{
scriptService = (ScriptService)factory.getBean(ServiceRegistry.SCRIPT_SERVICE.getLocalName());
}
/* (non-Javadoc)
* @see org.jbpm.graph.def.ActionHandler#execute(org.jbpm.graph.exe.ExecutionContext)
*/
@SuppressWarnings("unchecked")
public void execute(ExecutionContext executionContext) throws Exception
{
// extract action configuration
String expression = null;
List<VariableAccess> variableAccesses = null;
if (script.isTextOnly())
{
expression = script.getTextTrim();
}
else
{
variableAccesses = jpdlReader.readVariableAccesses(script);
expression = script.element("expression").getTextTrim();
}
// construct script arguments and execute
Map<String, Object> inputMap = createInputMap(executionContext, variableAccesses);
Object result = scriptService.executeScriptString(expression, inputMap);
// map script return variable to process context
VariableAccess returnVariable = getWritableVariable(variableAccesses);
if (returnVariable != null)
{
ContextInstance contextInstance = executionContext.getContextInstance();
Token token = executionContext.getToken();
contextInstance.setVariable(returnVariable.getVariableName(), result, token);
}
}
/**
* Construct map of arguments to pass to script
*
* Based on the <variable> elements of the action configuration.
*
* @param executionContext the execution context
* @param variableAccesses the variable configuration
* @return the map of script arguments
*/
@SuppressWarnings("unchecked")
public Map<String, Object> createInputMap(ExecutionContext executionContext, List<VariableAccess> variableAccesses)
{
Map<String, Object> inputMap = new HashMap<String, Object>();
// initialise process variables
Token token = executionContext.getToken();
inputMap.put("executionContext", executionContext);
inputMap.put("token", token);
if (executionContext.getNode() != null)
{
inputMap.put("node", executionContext.getNode());
}
if (executionContext.getTask() != null)
{
inputMap.put("task", executionContext.getTask());
}
if (executionContext.getTaskInstance() != null)
{
inputMap.put("taskInstance", executionContext.getTaskInstance());
}
// if no readable variableInstances are specified,
ContextInstance contextInstance = executionContext.getContextInstance();
if (!hasReadableVariable(variableAccesses))
{
// copy all the variableInstances of the context into the interpreter
Map<String, Object> variables = contextInstance.getVariables(token);
if (variables != null)
{
for (Map.Entry entry : variables.entrySet())
{
String variableName = (String) entry.getKey();
Object variableValue = entry.getValue();
inputMap.put(variableName, variableValue);
}
}
}
else
{
// copy the specified variableInstances into the interpreterz
for (VariableAccess variableAccess : variableAccesses)
{
if (variableAccess.isReadable())
{
String variableName = variableAccess.getVariableName();
String mappedName = variableAccess.getMappedName();
Object variableValue = contextInstance.getVariable(variableName, token);
inputMap.put(mappedName, variableValue);
}
}
}
return inputMap;
}
/**
* Determine if there are variables to read from the process context
*
* @param variableAccesses the variables configuration
* @return true => there are variables to read
*/
private boolean hasReadableVariable(List<VariableAccess> variableAccesses)
{
if (variableAccesses != null)
{
for (VariableAccess variableAccess : variableAccesses)
{
if (variableAccess.isReadable())
{
return true;
}
}
}
return false;
}
/**
* Determine if there is a variable to write back to the process context
*
* @param variableAccesses the variables configuration
* @return true => there is a variable to write
*/
private VariableAccess getWritableVariable(List<VariableAccess> variableAccesses)
{
if (variableAccesses != null)
{
for (VariableAccess variableAccess : variableAccesses)
{
if (variableAccess.isWritable())
{
return variableAccess;
}
}
}
return null;
}
}

21
source/java/org/alfresco/repo/workflow/jbpm/JBPMEngineTest.java
View File

@@ -59,7 +59,7 @@ public class JBPMEngineTest extends BaseSpringTest
WorkflowDefinition testWorkflowDef;
NodeRef testNodeRef;
//@Override
protected void onSetUpInTransaction() throws Exception
{
@@ -308,6 +308,7 @@ public class JBPMEngineTest extends BaseSpringTest
WorkflowDefinition workflowDef = getTestDefinition();
Map<QName, Serializable> parameters = new HashMap<QName, Serializable>();
parameters.put(QName.createQName(NamespaceService.DEFAULT_URI, "reviewer"), "admin");
parameters.put(QName.createQName(NamespaceService.DEFAULT_URI, "testNode"), testNodeRef);
WorkflowPath path = workflowComponent.startWorkflow(workflowDef.id, parameters);
assertNotNull(path);
assertNotNull(path);
@@ -331,6 +332,7 @@ public class JBPMEngineTest extends BaseSpringTest
WorkflowDefinition workflowDef = getTestDefinition();
Map<QName, Serializable> parameters = new HashMap<QName, Serializable>();
parameters.put(QName.createQName(NamespaceService.DEFAULT_URI, "reviewer"), "admin");
parameters.put(QName.createQName(NamespaceService.DEFAULT_URI, "testNode"), testNodeRef);
WorkflowPath path = workflowComponent.startWorkflow(workflowDef.id, parameters);
assertNotNull(path);
assertNotNull(path);
@@ -359,7 +361,22 @@ public class JBPMEngineTest extends BaseSpringTest
assertEquals(WorkflowTaskState.IN_PROGRESS, tasks1.get(0).state);
WorkflowTask updatedTask = taskComponent.endTask(tasks1.get(0).id, null);
assertNotNull(updatedTask);
assertEquals(WorkflowTaskState.COMPLETED, updatedTask.state);
}
public void testScript()
{
WorkflowDefinition workflowDef = getTestDefinition();
Map<QName, Serializable> parameters = new HashMap<QName, Serializable>();
parameters.put(QName.createQName(NamespaceService.DEFAULT_URI, "reviewer"), "admin");
parameters.put(QName.createQName(NamespaceService.DEFAULT_URI, "testNode"), testNodeRef);
WorkflowPath path = workflowComponent.startWorkflow(workflowDef.id, parameters);
assertNotNull(path);
List<WorkflowTask> tasks1 = workflowComponent.getTasksForWorkflowPath(path.id);
assertNotNull(tasks1);
assertEquals(1, tasks1.size());
WorkflowTask updatedTask = taskComponent.endTask(tasks1.get(0).id, path.node.transitions[0]);
assertNotNull(updatedTask);
}

21
source/java/org/alfresco/repo/workflow/jbpm/test_processdefinition.xml
View File

@@ -9,8 +9,22 @@
<variable name="testNode" access="write,required" />
</controller>
</task>
<transition name="" to="Review"></transition>
<transition name="end" to="end"></transition>
<transition name="" to="Review">
<action class="org.alfresco.repo.workflow.jbpm.AlfrescoJavaScript">
<script>
<expression>
function result()
{
return ("Process instance = " + executionContext.processInstance.id + ", testNode children = " + testNode.children.length);
}
result();
</expression>
<variable name="scriptResult" access="write"/>
</script>
</action>
</transition>
<transition name="end" to="end">
</transition>
</start-state>
<swimlane name="Reviewer">
<assignment actor-id="#{reviewer}"></assignment>
@@ -20,6 +34,7 @@
<script>
System.out.println("the reviewer is " + reviewer);
System.out.println("node " + testNode.name + " contains " + testNode.children.length + " children");
System.out.println("scriptResult = " + scriptResult);
</script>
</event>
<task name="Review" duedate="1 business day" blocking="true" swimlane="Reviewer">
@@ -27,7 +42,7 @@
<variable name="comment" access="read,write,required"></variable>
</controller>
</task>
<transition name="" to="publish"></transition>
<transition name="" to="end"></transition>
</task-node>
<end-state name="end"></end-state>
</process-definition>