| /* |
| * 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.lenya.workflow.impl; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.apache.avalon.excalibur.pool.Poolable; |
| import org.apache.avalon.framework.logger.AbstractLogEnabled; |
| import org.apache.avalon.framework.service.ServiceException; |
| import org.apache.avalon.framework.service.ServiceManager; |
| import org.apache.avalon.framework.service.Serviceable; |
| import org.apache.lenya.cms.cocoon.source.SourceUtil; |
| import org.apache.lenya.workflow.Workflow; |
| import org.apache.lenya.workflow.WorkflowEngine; |
| import org.apache.lenya.workflow.WorkflowException; |
| import org.apache.lenya.workflow.WorkflowManager; |
| import org.apache.lenya.workflow.Workflowable; |
| import org.w3c.dom.Document; |
| |
| /** |
| * Workflow manager implementation. |
| * |
| * @version $Id: WorkflowManagerImpl.java 179751 2005-06-03 09:13:35Z andreas $ |
| */ |
| public class WorkflowManagerImpl extends AbstractLogEnabled implements WorkflowManager, |
| Serviceable, Poolable { |
| |
| private Map uri2workflow = new HashMap(); |
| |
| /** |
| * @see org.apache.lenya.workflow.WorkflowManager#invoke(org.apache.lenya.workflow.Workflowable, |
| * java.lang.String, boolean) |
| */ |
| public void invoke(Workflowable workflowable, String event, boolean force) |
| throws WorkflowException { |
| if (hasWorkflow(workflowable)) { |
| WorkflowEngine engine = new WorkflowEngineImpl(); |
| Workflow workflow = getWorkflowSchema(workflowable); |
| |
| if (force && !engine.canInvoke(workflowable, workflow, event)) { |
| throw new WorkflowException("The event [" + event |
| + "] cannot be invoked on the document [" + workflowable + "]"); |
| } |
| engine.invoke(workflowable, workflow, event); |
| } |
| } |
| |
| /** |
| * @see org.apache.lenya.workflow.WorkflowManager#invoke(org.apache.lenya.workflow.Workflowable, |
| * java.lang.String) |
| */ |
| public void invoke(Workflowable workflowable, String event) throws WorkflowException { |
| invoke(workflowable, event, true); |
| } |
| |
| /** |
| * @see org.apache.lenya.workflow.WorkflowManager#canInvoke(org.apache.lenya.workflow.Workflowable, |
| * java.lang.String) |
| */ |
| public boolean canInvoke(Workflowable workflowable, String event) { |
| boolean canInvoke = true; |
| try { |
| if (hasWorkflow(workflowable)) { |
| Workflow workflow = getWorkflowSchema(workflowable); |
| WorkflowEngine engine = new WorkflowEngineImpl(); |
| canInvoke = engine.canInvoke(workflowable, workflow, event); |
| } |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| return canInvoke; |
| } |
| |
| protected ServiceManager manager; |
| |
| /** |
| * @see org.apache.avalon.framework.service.Serviceable#service(org.apache.avalon.framework.service.ServiceManager) |
| */ |
| public void service(ServiceManager manager) throws ServiceException { |
| this.manager = manager; |
| } |
| |
| /** |
| * @see org.apache.lenya.workflow.WorkflowManager#getWorkflowSchema(org.apache.lenya.workflow.Workflowable) |
| */ |
| public Workflow getWorkflowSchema(Workflowable workflowable) throws WorkflowException { |
| WorkflowImpl workflow = null; |
| |
| try { |
| String uri = workflowable.getWorkflowSchemaURI(); |
| getLogger().debug("Workflow URI: " + uri); |
| if (uri != null) { |
| workflow = (WorkflowImpl) this.uri2workflow.get(uri); |
| if (workflow == null) { |
| Document document = SourceUtil.readDOM(uri, this.manager); |
| if (document == null) { |
| throw new WorkflowException("Could not read workflow schema from URI [" |
| + uri + "]!"); |
| } |
| WorkflowBuilder builder = new WorkflowBuilder(getLogger()); |
| workflow = builder.buildWorkflow(uri, document); |
| this.uri2workflow.put(uri, workflow); |
| } |
| } |
| } catch (final Exception e) { |
| throw new WorkflowException(e); |
| } |
| |
| return workflow; |
| } |
| |
| /** |
| * @see org.apache.lenya.workflow.WorkflowManager#hasWorkflow(org.apache.lenya.workflow.Workflowable) |
| */ |
| public boolean hasWorkflow(Workflowable workflowable) { |
| return workflowable.getWorkflowSchemaURI() != null; |
| } |
| |
| } |