com.linuxbox.enkive.web.VersionServlet.java Source code

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Here is the source code for com.linuxbox.enkive.web.VersionServlet.java

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/*******************************************************************************
 * Copyright 2013 The Linux Box Corporation.
 *
 * This file is part of Enkive CE (Community Edition).
 *
 * Enkive CE is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of
 * the License, or (at your option) any later version.
 *
 * Enkive CE 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public
 * License along with Enkive CE. If not, see
 * <http://www.gnu.org/licenses/>.
 *******************************************************************************/
package com.linuxbox.enkive.web;

import static com.linuxbox.enkive.web.WebConstants.VERSION_LOCAL;
import static com.linuxbox.enkive.web.WebConstants.VERSION_REMOTE;
import static com.linuxbox.enkive.web.WebConstants.VERSION_UPGRADE;

import java.io.IOException;

import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.json.JSONException;
import org.json.JSONObject;

import com.linuxbox.enkive.ProductInfo;
import com.linuxbox.enkive.administration.AdministrationService;
import com.linuxbox.enkive.exception.EnkiveServletException;
import com.linuxbox.util.Version;

/**
 * This webscript is run when a user wants to see the current local and upstream
 * versions of Enkive
 */
public class VersionServlet extends EnkiveServlet {
    /**
     * 
     */
    private static final long serialVersionUID = 1226107681645083623L;

    protected static final Log LOGGER = LogFactory.getLog("com.linuxbox.enkive.webscripts.version");

    protected AdministrationService adminService;

    @Override
    public void init(ServletConfig config) throws ServletException {
        super.init(config);
        this.adminService = getAdministrationService();
    }

    public void doGet(HttpServletRequest req, HttpServletResponse res) throws IOException {
        JSONObject jsonResult = new JSONObject();
        Version version = adminService.getVersion();
        try {
            jsonResult.put(VERSION_LOCAL, ProductInfo.VERSION.toString());
            if (version != null) {
                jsonResult.put(VERSION_REMOTE, version.toString());
                jsonResult.put(VERSION_UPGRADE, !version.equals(ProductInfo.VERSION));
            } else {
                jsonResult.put(VERSION_REMOTE, "Unknown");
                jsonResult.put(VERSION_UPGRADE, false);
            }

            res.getWriter().write(jsonResult.toString());
        } catch (JSONException e) {
            respondError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, null, res);
            throw new EnkiveServletException("Unable to serialize JSON", e);
        }
    }
}