org.emergent.plumber.InfoServlet.java Source code

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Here is the source code for org.emergent.plumber.InfoServlet.java

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/*
 * Copyright 2011 Patrick Woodworth
 *
 * Licensed 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.emergent.plumber;

import org.json.JSONException;
import org.json.JSONObject;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Timestamp;

/**
 * @author Patrick Woodworth
 */
public class InfoServlet extends AbstractSyncServlet {

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String msg = "";
        try {
            msg = getMsg(req);
        } catch (SQLException e) {
            log(e.getMessage(), e);
        }

        if (msg != null) {
            resp.setContentType("application/json");
            PrintWriter writer = resp.getWriter();
            log("infocolresp: " + msg);
            writer.append(msg);
        } else {
            resp.sendError(404);
        }
    }

    protected String getMsg(HttpServletRequest req) throws SQLException {
        String username = (String) req.getAttribute(ATTRIB_USERNAME_KEY);
        Connection conn = null;
        PreparedStatement st = null;
        ResultSet rs = null;
        try {
            conn = getDatabaseConnection(req);
            st = conn.prepareStatement("SELECT E.engine, MAX(E.modified)" + " FROM WeaveUser U, EngineWbo E"
                    + " WHERE U.userid = E.userid" + " AND U.username = ?" + " GROUP BY E.engine");
            st.setString(1, username);
            rs = st.executeQuery();

            JSONObject retvalObj = new JSONObject();
            while (rs.next()) {
                String id = rs.getString(1);
                Timestamp modified = rs.getTimestamp(2);
                long mod = modified.getTime();
                double modDouble = MiscUtil.toWeaveTimestampDouble(mod);
                retvalObj.put(id, modDouble);
            }
            return retvalObj.toString();
        } catch (JSONException e) {
            throw new SQLException(e);
        } finally {
            MiscUtil.close(rs);
            MiscUtil.close(st);
            MiscUtil.close(conn);
        }
    }

}