From ad0e368eeedb0454e1dd398bd84c23cbfbd692f8 Mon Sep 17 00:00:00 2001 From: lresende Date: Mon, 2 Nov 2009 22:23:40 +0000 Subject: Moving das tags git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@832150 13f79535-47bb-0310-9956-ffa450edef68 --- .../apache/tuscany/samples/web/CommandServlet.java | 160 +++++++++++++++++++++ 1 file changed, 160 insertions(+) create mode 100644 das-java/tags/1.0-incubating-beta1-rc3/samples/sample-ajax-das/src/main/java/org/apache/tuscany/samples/web/CommandServlet.java (limited to 'das-java/tags/1.0-incubating-beta1-rc3/samples/sample-ajax-das/src/main/java/org/apache/tuscany/samples/web/CommandServlet.java') diff --git a/das-java/tags/1.0-incubating-beta1-rc3/samples/sample-ajax-das/src/main/java/org/apache/tuscany/samples/web/CommandServlet.java b/das-java/tags/1.0-incubating-beta1-rc3/samples/sample-ajax-das/src/main/java/org/apache/tuscany/samples/web/CommandServlet.java new file mode 100644 index 0000000000..26a1f468a7 --- /dev/null +++ b/das-java/tags/1.0-incubating-beta1-rc3/samples/sample-ajax-das/src/main/java/org/apache/tuscany/samples/web/CommandServlet.java @@ -0,0 +1,160 @@ +/* + * 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.tuscany.samples.web; + +import java.io.IOException; + +import javax.servlet.http.HttpServlet; +import javax.servlet.RequestDispatcher; +import javax.servlet.ServletConfig; +import javax.servlet.ServletException; +import javax.servlet.http.HttpServletRequest; +import javax.servlet.http.HttpServletResponse; + +import org.apache.tuscany.das.rdb.dbconfig.DBInitializer; +/** + * This is generic servlet where based on serviceName, it will call the speciliazed processor to + * process request and obtain response. This servlet can be used in any web sample, just needs to + * pass appropriate serviceProcessorClassName and rest is generic + * + */ +public class CommandServlet extends HttpServlet { + final static long serialVersionUID = 1221332432; + /* + * (non-Java-doc) + * + * @see javax.servlet.http.HttpServlet#HttpServlet() + */ + public CommandServlet() { + super(); + } + + public static void refreshDB() throws ServletException { + try{ + DBInitializer dbInitializer = new DBInitializer("AjaxDBConfig.xml"); + dbInitializer.refreshDatabaseData(); + }catch(Exception e){ + e.printStackTrace(); + ServletException se = new ServletException(e.getMessage()); + throw se; + } + } + + public void init(ServletConfig config) throws ServletException { + refreshDB(); + } + + /* + * (non-Java-doc) + * + * @see javax.servlet.http.HttpServlet#doGet(HttpServletRequest arg0, + * HttpServletResponse arg1) + */ + protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { + doTask(request, response); + } + + /* + * (non-Java-doc) + * + * @see javax.servlet.http.HttpServlet#doPost(HttpServletRequest arg0, + * HttpServletResponse arg1) + */ + protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { + doTask(request, response); + } + + /**Invoke passed service and return result + * + * @param req + * @param resp + * @throws ServletException + * @throws IOException + */ + public void doTask(HttpServletRequest req, HttpServletResponse resp) + throws ServletException, IOException { + String textContentType= "text/text"; + String xmlContentType= "text/xml"; + + String refreshRequest = req.getParameter("refreshDB"); + if(refreshRequest != null && refreshRequest.equals("yes")){ + { + try{ + refreshDB(); + }catch(ServletException e){ + throw e; + } + } + this.writeResponse(resp, "Refreshed database!", textContentType); + } + else{ + String serviceName = req.getParameter("serviceName");//e.g. DASQueryProcessor + String qry = req.getParameter("Query");//e.g. query:xxx, command:yyy + String configFile = req.getParameter("configFile");//name of DAS config file + + try{ + ServiceProcessor serviceClassInst = null; + //so any subclass of abstract ServiceProcessor can be used + Object obj = Class.forName(serviceName).newInstance(); + + if(obj instanceof ServiceProcessor){ + serviceClassInst = (ServiceProcessor)obj; + } + + String result = serviceClassInst.execute(qry, configFile); + this.writeResponse(resp, result, xmlContentType); + }catch(Exception e){ + this.writeResponse(resp, e.getMessage(), textContentType); + e.printStackTrace(); + } + } + } + + /**Write response in required content type to servlet response + * + * @param resp + * @param output + * @param contentType + * @throws IOException + */ + public void writeResponse(HttpServletResponse resp, String output, String contentType) throws IOException { + resp.setContentType(contentType);//"text/text", "text/xml" + resp.setHeader("Cache-Control", "no-cache"); + resp.getWriter().write(output); + } + + // Utility methods + + public void gotoURL(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, String url) throws ServletException, IOException { + url = response.encodeURL(url); + RequestDispatcher dispatcher = getServletContext().getRequestDispatcher(url); + dispatcher.forward(request, response); + } + + public void redirectURL(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, String url) throws ServletException, IOException { + url = response.encodeURL(request.getContextPath() + url); + response.sendRedirect(url); + } + + public void forwardURL(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, String url) throws ServletException, IOException { + url = response.encodeURL(url); + RequestDispatcher dispatch = getServletContext().getRequestDispatcher(url); + dispatch.forward(request, response); + } +} -- cgit v1.2.3