Java tutorial
/*! * This program is free software; you can redistribute it and/or modify it under the * terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software * Foundation. * * You should have received a copy of the GNU Lesser General Public License along with this * program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html * or from the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. * * 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 Lesser General Public License for more details. * * Copyright (c) 2002-2013 Pentaho Corporation.. All rights reserved. */ package org.pentaho.platform.web.servlet; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.pentaho.actionsequence.dom.IActionDefinition; import org.pentaho.platform.api.engine.IActionParameter; import org.pentaho.platform.api.engine.IActionSequence; import org.pentaho.platform.api.engine.ICreateFeedbackParameterCallback; import org.pentaho.platform.api.engine.IMimeTypeListener; import org.pentaho.platform.api.engine.IOutputHandler; import org.pentaho.platform.api.engine.IParameterProvider; import org.pentaho.platform.api.engine.IPentahoRequestContext; import org.pentaho.platform.api.engine.IPentahoSession; import org.pentaho.platform.api.engine.IRuntimeContext; import org.pentaho.platform.api.engine.ISystemSettings; import org.pentaho.platform.api.repository.IContentItem; import org.pentaho.platform.api.repository2.unified.RepositoryFilePermission; import org.pentaho.platform.engine.core.solution.ActionInfo; import org.pentaho.platform.engine.core.system.PentahoRequestContextHolder; import org.pentaho.platform.engine.core.system.PentahoSystem; import org.pentaho.platform.engine.services.ActionSequenceJCRHelper; import org.pentaho.platform.engine.services.actionsequence.ActionParameterSource; import org.pentaho.platform.util.web.SimpleUrlFactory; import org.pentaho.platform.web.http.HttpOutputHandler; import org.pentaho.platform.web.http.request.HttpRequestParameterProvider; import javax.servlet.ServletException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.ParserConfigurationException; import javax.xml.transform.TransformerConfigurationException; import javax.xml.transform.TransformerException; import javax.xml.transform.TransformerFactory; import javax.xml.transform.TransformerFactoryConfigurationError; import javax.xml.transform.dom.DOMSource; import javax.xml.transform.stream.StreamResult; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.OutputStream; import java.io.StringWriter; import java.util.HashMap; import java.util.List; import java.util.Map; public class SolutionEngineInteractivityService extends ServletBase { private static final Log logger = LogFactory.getLog(SolutionEngineInteractivityService.class); protected Map xformFields = new HashMap(); public Log getLogger() { return SolutionEngineInteractivityService.logger; } public SolutionEngineInteractivityService() { super(); } protected boolean doMessages(final HttpServletRequest request) { return "true".equalsIgnoreCase(request.getParameter("debug")); //$NON-NLS-1$ //$NON-NLS-2$ } protected void handleActionRequest(final HttpServletRequest request, final HttpServletResponse response, final HttpOutputHandler outputHandler, final HttpServletRequestHandler requestHandler, IParameterProvider requestParameters, ByteArrayOutputStream outputStream, final IContentItem contentItem) throws ServletException, IOException { IRuntimeContext runtime = null; try { final org.w3c.dom.Document document = DocumentBuilderFactory.newInstance().newDocumentBuilder() .newDocument(); final org.w3c.dom.Element root = document.createElement("action_sequence_info"); document.appendChild(root); requestHandler.setCreateFeedbackParameterCallback(new ICreateFeedbackParameterCallback() { public void createFeedbackParameter(IRuntimeContext runtimeContext, String fieldName, String displayName, String hint, Object defaultValues, List values, Map dispNames, String displayStyle, boolean optional, boolean visible) { org.w3c.dom.Element parameterElement = document.createElement("parameter"); parameterElement.setAttribute("name", fieldName); parameterElement.setAttribute("display-name", displayName); parameterElement.setAttribute("display-style", displayStyle); parameterElement.setAttribute("hint", "" + hint); parameterElement.setAttribute("optional", "" + optional); parameterElement.setAttribute("visible", "" + visible); try { IActionParameter actionParameter = runtimeContext.getInputParameter(fieldName); if (actionParameter != null) { List variables = actionParameter.getVariables(); for (int i = 0; variables != null && i < variables.size(); i++) { Object var = variables.get(i); if (var instanceof ActionParameterSource) { String sourceName = ((ActionParameterSource) var).getSourceName(); String sourceValue = ((ActionParameterSource) var).getValue(); parameterElement.setAttribute("source-name", "" + sourceName); parameterElement.setAttribute("source-value", "" + sourceValue); } else { System.out.println(var); } } } } catch (Exception npe) { //ignore } root.appendChild(parameterElement); if (values != null) { org.w3c.dom.Element valuesElement = document.createElement("values"); for (Object value : values) { org.w3c.dom.Element valueElement = document.createElement("value"); valueElement.setAttribute("value", "" + value); if (dispNames != null && dispNames.containsKey(value)) { valueElement.setAttribute("display-name", "" + dispNames.get(value)); } valuesElement.appendChild(valueElement); } parameterElement.appendChild(valuesElement); } if (defaultValues != null) { org.w3c.dom.Element valuesElement = document.createElement("selected-values"); if (defaultValues instanceof List) { for (Object value : (List) defaultValues) { org.w3c.dom.Element valueElement = document.createElement("value"); valueElement.setAttribute("value", "" + value); valuesElement.appendChild(valueElement); } } else { org.w3c.dom.Element valueElement = document.createElement("value"); valueElement.setAttribute("value", "" + defaultValues); valuesElement.appendChild(valueElement); } parameterElement.appendChild(valuesElement); } } }); runtime = requestHandler.handleActionRequest(0, 0); root.setAttribute("is-prompt-pending", "" + runtime.isPromptPending()); DOMSource source = new DOMSource(document); StreamResult result = new StreamResult(new StringWriter()); TransformerFactory.newInstance().newTransformer().transform(source, result); String theXML = result.getWriter().toString(); response.setContentType("text/xml"); response.getOutputStream().write(theXML.getBytes()); response.getOutputStream().close(); } catch (ParserConfigurationException e) { e.printStackTrace(); } catch (TransformerConfigurationException e) { e.printStackTrace(); } catch (TransformerException e) { e.printStackTrace(); } catch (TransformerFactoryConfigurationError e) { e.printStackTrace(); } finally { if (runtime != null) { runtime.dispose(); } } if (contentItem != null) { contentItem.closeOutputStream(); } } protected void setupRequestHandler(final HttpServletRequest request, final HttpServletRequestHandler requestHandler) { String prompt = request.getParameter("prompt"); //$NON-NLS-1$ String actionPath = request.getParameter("path"); //$NON-NLS-1$ String processId = this.getClass().getName(); String instanceId = request.getParameter("instance-id"); //$NON-NLS-1$ requestHandler.setInstanceId(instanceId); requestHandler.setProcessId(processId); requestHandler.setActionPath(actionPath); requestHandler.setForcePrompt((prompt != null) && prompt.equalsIgnoreCase("yes")); //$NON-NLS-1$ } protected void setupOutputHandler(final HttpOutputHandler outputHandler, final IParameterProvider requestParameters) { int outputPreference = IOutputHandler.OUTPUT_TYPE_DEFAULT; outputHandler.setOutputPreference(outputPreference); } protected HttpServletRequestHandler getRequestHandler(final HttpServletRequest request, final HttpServletResponse response, final IPentahoSession userSession, final IParameterProvider requestParameters, final OutputStream outputStream, final HttpOutputHandler outputHandler, final SimpleUrlFactory urlFactory) throws ServletException, IOException { HttpServletRequestHandler requestHandler = new HttpServletRequestHandler(userSession, null, request, outputHandler, urlFactory); setupRequestHandler(request, requestHandler, requestParameters, userSession); return requestHandler; } protected HttpOutputHandler createOutputHandler(final HttpServletResponse response, final OutputStream outputStream) { return new HttpOutputHandler(response, outputStream, true); } @Override protected void doGet(final HttpServletRequest request, final HttpServletResponse response) throws ServletException, IOException { PentahoSystem.systemEntryPoint(); try { IPentahoSession userSession = getPentahoSession(request); ByteArrayOutputStream outputStream = new ByteArrayOutputStream(); String solutionName = request.getParameter("solution"); //$NON-NLS-1$ String actionPath = request.getParameter("path"); //$NON-NLS-1$ String actionName = request.getParameter("action"); //$NON-NLS-1$ IActionSequence actionSequence = new ActionSequenceJCRHelper().getActionSequence( ActionInfo.buildSolutionPath(solutionName, actionPath, actionName), PentahoSystem.loggingLevel, RepositoryFilePermission.READ); String fileName = null; if (actionSequence != null) { String title = actionSequence.getTitle(); if ((title != null) && (title.length() > 0)) { fileName = title; } else { String sequenceName = actionSequence.getSequenceName(); if ((sequenceName != null) && (sequenceName.length() > 0)) { fileName = sequenceName; } else { List actionDefinitionsList = actionSequence.getActionDefinitionsAndSequences(); int i = 0; boolean done = false; while ((actionDefinitionsList.size() > i) && !done) { IActionDefinition actionDefinition = (IActionDefinition) actionDefinitionsList.get(i); String componentName = actionDefinition.getComponentName(); if ((componentName != null) && (componentName.length() > 0)) { fileName = componentName; done = true; } else { i++; } } } } } IPentahoRequestContext requestContext = PentahoRequestContextHolder.getRequestContext(); HttpOutputHandler outputHandler = createOutputHandler(response, outputStream); outputHandler.setSession(userSession); IMimeTypeListener listener = new HttpMimeTypeListener(request, response); listener.setName(fileName); outputHandler.setMimeTypeListener(listener); SimpleUrlFactory urlFactory = new SimpleUrlFactory( requestContext.getContextPath() + "SolutionEngineInteractivityService?"); //$NON-NLS-1$ IParameterProvider requestParameters = new HttpRequestParameterProvider(request); setupOutputHandler(outputHandler, requestParameters); HttpServletRequestHandler requestHandler = getRequestHandler(request, response, userSession, requestParameters, outputStream, outputHandler, urlFactory); handleActionRequest(request, response, outputHandler, requestHandler, requestParameters, outputStream, null); } finally { PentahoSystem.systemExitPoint(); } } @Override protected void doPost(final HttpServletRequest request, final HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } protected void setupRequestHandler(final HttpServletRequest request, final HttpServletRequestHandler requestHandler, final IParameterProvider requestParameters, final IPentahoSession userSession) { this.setupRequestHandler(request, requestHandler); // first take a secondary action String actionName = requestParameters.getStringParameter("action2", null); //$NON-NLS-1$ if (actionName == null) { // now look for a primary action actionName = requestParameters.getStringParameter("action", null); //$NON-NLS-1$ } ISystemSettings systemSettings = PentahoSystem.getSystemSettings(); String defaultParameterXsl = systemSettings.getSystemSetting("default-parameter-xsl", "DefaultParameterForm.xsl"); //$NON-NLS-1$ //$NON-NLS-2$ requestHandler.setParameterXsl(defaultParameterXsl); } }