Java tutorial
/* Licensed 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.activiti.explorer.ui.process; import java.io.InputStream; import java.net.URL; import java.util.ArrayList; import java.util.List; import javax.xml.stream.XMLInputFactory; import javax.xml.stream.XMLStreamReader; import org.activiti.bpmn.converter.BpmnXMLConverter; import org.activiti.bpmn.model.BpmnModel; import org.activiti.bpmn.model.GraphicInfo; import org.activiti.engine.ManagementService; import org.activiti.engine.ProcessEngines; import org.activiti.engine.RepositoryService; import org.activiti.engine.impl.jobexecutor.TimerActivateProcessDefinitionHandler; import org.activiti.engine.impl.jobexecutor.TimerSuspendProcessDefinitionHandler; import org.activiti.engine.impl.persistence.entity.JobEntity; import org.activiti.engine.repository.Deployment; import org.activiti.engine.repository.ProcessDefinition; import org.activiti.engine.runtime.Job; import org.activiti.explorer.Constants; import org.activiti.explorer.ExplorerApp; import org.activiti.explorer.I18nManager; import org.activiti.explorer.Messages; import org.activiti.explorer.ui.mainlayout.ExplorerLayout; import org.activiti.explorer.util.XmlUtil; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import com.vaadin.terminal.ExternalResource; import com.vaadin.terminal.StreamResource; import com.vaadin.ui.ComponentContainer; import com.vaadin.ui.Embedded; import com.vaadin.ui.HorizontalLayout; import com.vaadin.ui.Label; import com.vaadin.ui.Panel; import com.vaadin.ui.VerticalLayout; import com.vaadin.ui.themes.Reindeer; /** * @author Frederik Heremans * @author Joram Barrez */ public class ProcessDefinitionInfoComponent extends VerticalLayout { private static final long serialVersionUID = 1L; protected static final Logger LOGGER = LoggerFactory.getLogger(ProcessDefinitionInfoComponent.class); // Services protected transient RepositoryService repositoryService; protected transient ManagementService managementService; protected I18nManager i18nManager; // Members protected ProcessDefinition processDefinition; protected Deployment deployment; // UI protected HorizontalLayout timeDetails; protected VerticalLayout processImageContainer; public ProcessDefinitionInfoComponent(ProcessDefinition processDefinition, Deployment deployment) { super(); this.repositoryService = ProcessEngines.getDefaultProcessEngine().getRepositoryService(); this.managementService = ProcessEngines.getDefaultProcessEngine().getManagementService(); this.i18nManager = ExplorerApp.get().getI18nManager(); this.processDefinition = processDefinition; this.deployment = deployment; addStyleName(ExplorerLayout.STYLE_DETAIL_BLOCK); initSuspensionStateInformation(); initImage(); } protected void initSuspensionStateInformation() { List<Job> jobs = managementService.createJobQuery().processDefinitionId(processDefinition.getId()) .orderByJobDuedate().asc().list(); List<JobEntity> suspensionStateJobs = new ArrayList<JobEntity>(); // TODO: this is a hack (ie the cast to JobEntity)... we must clean this in the engine! for (Job job : jobs) { JobEntity jobEntity = (JobEntity) job; if (jobEntity.getJobHandlerType().equals(TimerSuspendProcessDefinitionHandler.TYPE) || jobEntity.getJobHandlerType().equals(TimerActivateProcessDefinitionHandler.TYPE)) { suspensionStateJobs.add(jobEntity); } } if (!suspensionStateJobs.isEmpty()) { // Header Label suspensionStateTitle = new Label( i18nManager.getMessage(Messages.PROCESS_HEADER_SUSPENSION_STATE)); suspensionStateTitle.addStyleName(ExplorerLayout.STYLE_H3); addComponent(suspensionStateTitle); addEmptySpace(this); // Actual suspend/activation jobs for (JobEntity jobEntity : suspensionStateJobs) { if (jobEntity.getJobHandlerType().equals(TimerSuspendProcessDefinitionHandler.TYPE)) { Label suspendLabel = new Label( i18nManager.getMessage(Messages.PROCESS_SCHEDULED_SUSPEND, Constants.DEFAULT_TIME_FORMATTER.format(jobEntity.getDuedate())), Label.CONTENT_XHTML); addComponent(suspendLabel); } else if (jobEntity.getJobHandlerType().equals(TimerActivateProcessDefinitionHandler.TYPE)) { Label suspendLabel = new Label( i18nManager.getMessage(Messages.PROCESS_SCHEDULED_ACTIVATE, Constants.DEFAULT_TIME_FORMATTER.format(jobEntity.getDuedate())), Label.CONTENT_XHTML); addComponent(suspendLabel); } } } addEmptySpace(this); } protected void initImage() { processImageContainer = new VerticalLayout(); Label processTitle = new Label(i18nManager.getMessage(Messages.PROCESS_HEADER_DIAGRAM)); processTitle.addStyleName(ExplorerLayout.STYLE_H3); processImageContainer.addComponent(processTitle); boolean didDrawImage = false; if (ExplorerApp.get().isUseJavascriptDiagram()) { try { final InputStream definitionStream = repositoryService.getResourceAsStream( processDefinition.getDeploymentId(), processDefinition.getResourceName()); XMLInputFactory xif = XmlUtil.createSafeXmlInputFactory(); XMLStreamReader xtr = xif.createXMLStreamReader(definitionStream); BpmnModel bpmnModel = new BpmnXMLConverter().convertToBpmnModel(xtr); if (!bpmnModel.getFlowLocationMap().isEmpty()) { int maxX = 0; int maxY = 0; for (String key : bpmnModel.getLocationMap().keySet()) { GraphicInfo graphicInfo = bpmnModel.getGraphicInfo(key); double elementX = graphicInfo.getX() + graphicInfo.getWidth(); if (maxX < elementX) { maxX = (int) elementX; } double elementY = graphicInfo.getY() + graphicInfo.getHeight(); if (maxY < elementY) { maxY = (int) elementY; } } Panel imagePanel = new Panel(); // using panel for scrollbars imagePanel.addStyleName(Reindeer.PANEL_LIGHT); imagePanel.setWidth(100, UNITS_PERCENTAGE); imagePanel.setHeight(100, UNITS_PERCENTAGE); URL explorerURL = ExplorerApp.get().getURL(); URL url = new URL(explorerURL.getProtocol(), explorerURL.getHost(), explorerURL.getPort(), explorerURL.getPath().replace("/ui", "") + "diagram-viewer/index.html?processDefinitionId=" + processDefinition.getId()); Embedded browserPanel = new Embedded("", new ExternalResource(url)); browserPanel.setType(Embedded.TYPE_BROWSER); browserPanel.setWidth(maxX + 350 + "px"); browserPanel.setHeight(maxY + 220 + "px"); HorizontalLayout panelLayout = new HorizontalLayout(); panelLayout.setSizeUndefined(); imagePanel.setContent(panelLayout); imagePanel.addComponent(browserPanel); processImageContainer.addComponent(imagePanel); didDrawImage = true; } } catch (Exception e) { LOGGER.error("Error loading process diagram component", e); } } if (didDrawImage == false) { StreamResource diagram = null; // Try generating process-image stream if (processDefinition.getDiagramResourceName() != null) { diagram = new ProcessDefinitionImageStreamResourceBuilder().buildStreamResource(processDefinition, repositoryService); } if (diagram != null) { Embedded embedded = new Embedded(null, diagram); embedded.setType(Embedded.TYPE_IMAGE); embedded.setSizeUndefined(); Panel imagePanel = new Panel(); // using panel for scrollbars imagePanel.addStyleName(Reindeer.PANEL_LIGHT); imagePanel.setWidth(100, UNITS_PERCENTAGE); imagePanel.setHeight(100, UNITS_PERCENTAGE); HorizontalLayout panelLayout = new HorizontalLayout(); panelLayout.setSizeUndefined(); imagePanel.setContent(panelLayout); imagePanel.addComponent(embedded); processImageContainer.addComponent(imagePanel); didDrawImage = true; } } if (didDrawImage == false) { Label noImageAvailable = new Label(i18nManager.getMessage(Messages.PROCESS_NO_DIAGRAM)); processImageContainer.addComponent(noImageAvailable); } addComponent(processImageContainer); } protected void addEmptySpace(ComponentContainer container) { Label emptySpace = new Label(" ", Label.CONTENT_XHTML); emptySpace.setSizeUndefined(); container.addComponent(emptySpace); } }