Java tutorial
/* * Copyright (c) Immotronic, 2013 * * Contributors: * * Lionel Balme (lbalme@immotronic.fr) * Kevin Planchet (kplanchet@immotronic.fr) * * This file is part of snp-modbus, a component of the UBIKIT project. * * This software is a computer program whose purpose is to host third- * parties applications that make use of sensor and actuator networks. * * This software is governed by the CeCILL-C license under French law and * abiding by the rules of distribution of free software. You can use, * modify and/ or redistribute the software under the terms of the CeCILL-C * license as circulated by CEA, CNRS and INRIA at the following URL * As a counterpart to the access to the source code and rights to copy, * "http://www.cecill.info". * * As a counterpart to the access to the source code and rights to copy, * modify and redistribute granted by the license, users are provided only * with a limited warranty and the software's author, the holder of the * economic rights, and the successive licensors have only limited * liability. * * In this respect, the user's attention is drawn to the risks associated * with loading, using, modifying and/or developing or reproducing the * software by the user in light of its specific status of free software, * that may mean that it is complicated to manipulate, and that also * therefore means that it is reserved for developers and experienced * professionals having in-depth computer knowledge. Users are therefore * encouraged to load and test the software's suitability as regards their * requirements in conditions enabling the security of their systems and/or * data to be ensured and, more generally, to use and operate it in the * same conditions as regards security. * * The fact that you are presently reading this means that you have had * knowledge of the CeCILL-C license and that you accept its terms. * * CeCILL-C licence is fully compliant with the GNU Lesser GPL v2 and v3. * */ package fr.immotronic.ubikit.pems.modbus.impl; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.json.JSONException; import org.json.JSONObject; import org.ubikit.AbstractPhysicalEnvironmentModelEvent; import org.ubikit.Logger; import org.ubikit.pem.event.ItemAddedEvent; import org.ubikit.pem.event.ItemAddingFailedEvent; import org.ubikit.tools.http.WebApiCommons; import fr.immotronic.ubikit.pems.modbus.DeviceProfile; public class APIServlet extends HttpServlet { private static final long serialVersionUID = -6372127057898997808L; private final PemLauncher pemLauncher; public APIServlet(PemLauncher pemLauncher) { this.pemLauncher = pemLauncher; } @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { String[] pathInfo = req.getPathInfo().split("/"); // Expected path info is /command/command_param_1/command_param_2/...etc. // Notes: if the request is valid (e.g. looks like /command/command_params), // pathInfo[0] contains an empty string, // pathInfo[1] contains "command", // pathInfo[2] and next each contains a command parameter. Command parameters are "/"-separated. if (pathInfo != null && pathInfo.length > 1) { } resp.getWriter().write(WebApiCommons.errorMessage(WebApiCommons.Errors.invalid_query)); } @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { String[] pathInfo = req.getPathInfo().split("/"); // Expected path info is /command/command_param_1/command_param_2/...etc. // Notes: if the request is valid (e.g. looks like /command/command_params), // pathInfo[0] contains an empty string, // pathInfo[1] contains "command", // pathInfo[2] and next each contains a command parameter. Command parameters are "/"-separated. if (pathInfo != null && pathInfo.length > 1) { if (pathInfo[1].equals("add")) { try { DeviceProfile profile = DeviceProfile.valueOf(req.getParameter("deviceProfile")); JSONObject properties = new JSONObject(req.getParameter("properties")); AbstractPhysicalEnvironmentModelEvent addingResponseEvent = pemLauncher.createNewDevice(profile, req.getParameter("unitID"), req.getParameter("customName"), req.getParameter("location"), properties, Integer.parseInt(req.getParameter("autoReadingFrequency"))); if (addingResponseEvent != null) { if (addingResponseEvent instanceof ItemAddedEvent) { JSONObject o = new JSONObject(); try { o.put("deviceUID", addingResponseEvent.getSourceItemUID()); } catch (JSONException e) { Logger.error(LC.gi(), this, "doPost/addDevice: While building the response object."); resp.getWriter() .write(WebApiCommons.errorMessage(WebApiCommons.Errors.internal_error)); return; } resp.getWriter().write(WebApiCommons.okMessage(o)); return; } else if (addingResponseEvent instanceof ItemAddingFailedEvent) { ItemAddingFailedEvent e = (ItemAddingFailedEvent) addingResponseEvent; resp.getWriter().write(WebApiCommons.errorMessage(e.getReason(), e.getErrorCode())); return; } } else { Logger.error(LC.gi(), this, "doPost/addDevice: While building the response object."); resp.getWriter().write(WebApiCommons.errorMessage(WebApiCommons.Errors.internal_error)); return; } } catch (JSONException e) { Logger.error(LC.gi(), this, "doPost/addDevice: Error when reading device specific properties."); resp.getWriter().write(WebApiCommons.errorMessage(WebApiCommons.Errors.internal_error)); return; } catch (NumberFormatException e) { Logger.error(LC.gi(), this, "doPost/addDevice: Automatic Reading Frequency is not an Integer."); resp.getWriter().write(WebApiCommons.errorMessage("FREQUENCY_IS_NOT_A_NUMBER", WebApiCommons.Errors.invalid_query)); return; } } } resp.getWriter().write(WebApiCommons.errorMessage(WebApiCommons.Errors.invalid_query)); } }