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/*
* This file is part of rasdaman community.
*
* Rasdaman community is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Rasdaman community 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with rasdaman community. If not, see <http://www.gnu.org/licenses/>.
*
* Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009 Peter Baumann /
rasdaman GmbH.
*
* For more information please see <http://www.rasdaman.org>
* or contact Peter Baumann via <baumann@rasdaman.com>.
*/
package petascope.wcst.server.servlet;
//~--- non-JDK imports --------------------------------------------------------
import petascope.wcst.server.*;
import petascope.ConfigManager;
import org.apache.commons.io.FileUtils;
//~--- JDK imports ------------------------------------------------------------
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import petascope.wcps.server.core.DbMetadataSource;
import petascope.wcs.server.exceptions.WCSException;
/** Servlet interface for the WCS-Transactional server.
*
* @author Andrei Aiordachioaie
*/
public class wcstServlet extends HttpServlet {
private String defaultHtmlResponse;
private String relativeServletHtmlPath = "/templates/wcst-servlet.html";
private String servletHtmlPath;
private String relativeSettingsPath = "/settings.properties";
private WcstServer server;
private DbMetadataSource metadataSource;
@Override
public void init() throws ServletException {
// Initialize the configuration manager. Now all classes can read the settings.
String settingsPath = getServletContext().getRealPath(relativeSettingsPath);
ConfigManager config = ConfigManager.getInstance(settingsPath, getServletContext().getRealPath("/"));
try {
metadataSource = new DbMetadataSource(
ConfigManager.METADATA_DRIVER, ConfigManager.METADATA_URL,
ConfigManager.METADATA_USER, ConfigManager.METADATA_PASS, false);
} catch (Exception e) {
throw new ServletException("Metadata Database Error.", e);
}
// Initialize the WCS-T server with proper metadata
try {
server = new WcstServer(metadataSource);
} catch (WCSException e) {
throw new ServletException(e);
}
// Load the servlet HTML response
servletHtmlPath = getServletContext().getRealPath(relativeServletHtmlPath);
try {
defaultHtmlResponse = FileUtils.readFileToString(new File(servletHtmlPath));
} catch (IOException e) {
throw new ServletException(e);
}
}
/**
* Handles the HTTP <code>GET</code> method.
* @param request wcstServlet request
* @param response wcstServlet response
* @throws ServletException if a wcstServlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
System.out.println("WCS-T: invoked with GET");
printUsage(response);
}
/**
* Handles the HTTP <code>POST</code> method.
* @param request wcstServlet request
* @param response wcstServlet response
* @throws ServletException if a wcstServlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// Select the operation
int op = -1;
if (request.getParameter("TransactionXML") != null) {
op = 4;
}
// Convert the WCS request into a WCPS request
try {
// initialize WebService operation arguments here
String inputXml, outputXml;
PrintWriter out;
switch (op) {
case 4:
inputXml = request.getParameter("TransactionXML");
outputXml = server.Transaction(inputXml);
out = new PrintWriter(response.getOutputStream());
out.write(outputXml);
out.flush();
break;
default:
throw new Exception("No valid operation specified !");
}
} catch (Exception e) {
e.printStackTrace();
throw new ServletException("WCS-T servlet error !", e);
}
}
/**
* Returns a short description of the wcstServlet.
* @return a String containing wcstServlet description
*/
@Override
public String getServletInfo() {
return "WCS-T Extension. Petascope version " + ConfigManager.PETASCOPE_VERSION;
}
private void printUsage(HttpServletResponse response) throws IOException {
System.out.println("WCS-T: returning usage message");
response.setContentType("text/html; charset=utf-8");
PrintWriter out = new PrintWriter(response.getOutputStream());
out.println(defaultHtmlResponse);
out.close();
System.out.println("WCS-T: done nothing");
}
}
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