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    1   /*
    2    * Copyright 2012 The Netty Project
    3    *
    4    * The Netty Project licenses this file to you under the Apache License,
    5    * version 2.0 (the "License"); you may not use this file except in compliance
    6    * with the License. You may obtain a copy of the License at:
    7    *
    8    *   http://www.apache.org/licenses/LICENSE-2.0
    9    *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
    12   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
    13   * License for the specific language governing permissions and limitations
    14   * under the License.
    15   */
    16  package org.jboss.netty.example.localtime;
    17
    18  import static java.util.Calendar.*;
    19
    20  import java.util.Calendar;
    21  import java.util.TimeZone;
    22  import java.util.logging.Level;
    23  import java.util.logging.Logger;
    24
    25  import org.jboss.netty.channel.ChannelEvent;
    26  import org.jboss.netty.channel.ChannelHandlerContext;
    27  import org.jboss.netty.channel.ChannelStateEvent;
    28  import org.jboss.netty.channel.ExceptionEvent;
    29  import org.jboss.netty.channel.MessageEvent;
    30  import org.jboss.netty.channel.SimpleChannelUpstreamHandler;
    31  import org.jboss.netty.example.localtime.LocalTimeProtocol.Continent;
    32  import org.jboss.netty.example.localtime.LocalTimeProtocol.DayOfWeek;
    33  import org.jboss.netty.example.localtime.LocalTimeProtocol.LocalTime;
    34  import org.jboss.netty.example.localtime.LocalTimeProtocol.LocalTimes;
    35  import org.jboss.netty.example.localtime.LocalTimeProtocol.Location;
    36  import org.jboss.netty.example.localtime.LocalTimeProtocol.Locations;
    37
    38  public class LocalTimeServerHandler extends SimpleChannelUpstreamHandler {
    39
    40      private static final Logger logger = Logger.getLogger(
    41              LocalTimeServerHandler.class.getName());
    42
    43      @Override
    44      public void handleUpstream(
    45              ChannelHandlerContext ctx, ChannelEvent e) throws Exception {
    46          if (e instanceof ChannelStateEvent) {
    47              logger.info(e.toString());
    48          }
    49          super.handleUpstream(ctx, e);
    50      }
    51
    52      @Override
    53      public void messageReceived(
    54              ChannelHandlerContext ctx, MessageEvent e) {
    55
    56          Locations locations = (Locations) e.getMessage();
    57          long currentTime = System.currentTimeMillis();
    58
    59          LocalTimes.Builder builder = LocalTimes.newBuilder();
    60          for (Location l: locations.getLocationList()) {
    61              TimeZone tz = TimeZone.getTimeZone(
    62                      toString(l.getContinent()) + '/' + l.getCity());
    63              Calendar calendar = Calendar.getInstance(tz);
    64              calendar.setTimeInMillis(currentTime);
    65
    66              builder.addLocalTime(LocalTime.newBuilder().
    67                      setYear(calendar.get(YEAR)).
    68                      setMonth(calendar.get(MONTH) + 1).
    69                      setDayOfMonth(calendar.get(DAY_OF_MONTH)).
    70                      setDayOfWeek(DayOfWeek.valueOf(calendar.get(DAY_OF_WEEK))).
    71                      setHour(calendar.get(HOUR_OF_DAY)).
    72                      setMinute(calendar.get(MINUTE)).
    73                      setSecond(calendar.get(SECOND)).build());
    74          }
    75
    76          e.getChannel().write(builder.build());
    77      }
    78
    79      @Override
    80      public void exceptionCaught(
    81              ChannelHandlerContext ctx, ExceptionEvent e) {
    82          logger.log(
    83                  Level.WARNING,
    84                  "Unexpected exception from downstream.",
    85                  e.getCause());
    86          e.getChannel().close();
    87      }
    88
    89      private static String toString(Continent c) {
    90          return "" + c.name().charAt(0) + c.name().toLowerCase().substring(1);
    91      }
    92  }