/* * Copyright (c) 2002-2003 by OpenSymphony * All rights reserved. */package com.opensymphony.workflow.config;import com.opensymphony.workflow.FactoryException;import com.opensymphony.workflow.loader.*;import java.io.ByteArrayInputStream;import java.io.IOException;import java.net.MalformedURLException;import java.net.URL;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;/** * @author Hani Suleiman Date: Dec 17, 2004 Time: 12:21:44 PM */public class WorkflowFactoryServlet extends HttpServlet {    //~ Instance fields ////////////////////////////////////////////////////////    private WorkflowFactory factory;    //~ Methods ////////////////////////////////////////////////////////////////    public void init() throws ServletException {        DefaultConfiguration config = new DefaultConfiguration();        URL url = null;        String configFile = getInitParameter("config");        if (configFile != null) {            try {                url = new URL(configFile);            } catch (MalformedURLException e) {                try {                    url = getServletContext().getResource(configFile);                } catch (MalformedURLException e1) {                    e1.printStackTrace();                }            }        }        try {            config.load(url);        } catch (FactoryException e) {            throw new ServletException("Unable to create workflow factory", e);        }        this.factory = config.getFactory();    }    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {        String command = req.getParameter("command");        String docId = req.getParameter("docId");        if ("layout".equals(command)) {            Object layout = factory.getLayout(docId);            if (layout != null) {                resp.setContentType("text/plain");                resp.getWriter().write(layout.toString());            }        } else if ("workflow".equals(command)) {            try {                WorkflowDescriptor descriptor = factory.getWorkflow(docId);                resp.setContentType("text/xml");                descriptor.writeXML(resp.getWriter(), 0);            } catch (FactoryException e) {                e.printStackTrace(resp.getWriter());                resp.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);            }        }    }    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {        String command = req.getParameter("command");        String docId = req.getParameter("docId");        String data = req.getParameter("data");        if ("layout".equals(command)) {            factory.setLayout(docId, data.toString());        } else if ("workflow".equals(command)) {            boolean replace = "true".equals(req.getParameter("replace"));            try {                WorkflowDescriptor descriptor = WorkflowLoader.load(new ByteArrayInputStream(data.getBytes()), false);                factory.saveWorkflow(docId, descriptor, replace);            } catch (Exception e) {                e.printStackTrace(resp.getWriter());                resp.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);            }        }    }}