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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 org.jboss.netty.channel.ChannelEvent;
19  import org.jboss.netty.channel.ChannelHandlerContext;
20  import org.jboss.netty.channel.ChannelStateEvent;
21  import org.jboss.netty.channel.ExceptionEvent;
22  import org.jboss.netty.channel.MessageEvent;
23  import org.jboss.netty.channel.SimpleChannelUpstreamHandler;
24  import org.jboss.netty.example.localtime.LocalTimeProtocol.Continent;
25  import org.jboss.netty.example.localtime.LocalTimeProtocol.DayOfWeek;
26  import org.jboss.netty.example.localtime.LocalTimeProtocol.LocalTime;
27  import org.jboss.netty.example.localtime.LocalTimeProtocol.LocalTimes;
28  import org.jboss.netty.example.localtime.LocalTimeProtocol.Location;
29  import org.jboss.netty.example.localtime.LocalTimeProtocol.Locations;
30  
31  import java.util.Calendar;
32  import java.util.TimeZone;
33  
34  import static java.util.Calendar.*;
35  
36  public class LocalTimeServerHandler extends SimpleChannelUpstreamHandler {
37  
38      @Override
39      public void handleUpstream(ChannelHandlerContext ctx, ChannelEvent e) throws Exception {
40          if (e instanceof ChannelStateEvent) {
41              System.err.println(e);
42          }
43          super.handleUpstream(ctx, e);
44      }
45  
46      @Override
47      public void messageReceived(ChannelHandlerContext ctx, MessageEvent e) {
48  
49          Locations locations = (Locations) e.getMessage();
50          long currentTime = System.currentTimeMillis();
51  
52          LocalTimes.Builder builder = LocalTimes.newBuilder();
53          for (Location l: locations.getLocationList()) {
54              TimeZone tz = TimeZone.getTimeZone(toString(l.getContinent()) + '/' + l.getCity());
55              Calendar calendar = getInstance(tz);
56              calendar.setTimeInMillis(currentTime);
57  
58              builder.addLocalTime(LocalTime.newBuilder().
59                      setYear(calendar.get(YEAR)).
60                      setMonth(calendar.get(MONTH) + 1).
61                      setDayOfMonth(calendar.get(DAY_OF_MONTH)).
62                      setDayOfWeek(DayOfWeek.valueOf(calendar.get(DAY_OF_WEEK))).
63                      setHour(calendar.get(HOUR_OF_DAY)).
64                      setMinute(calendar.get(MINUTE)).
65                      setSecond(calendar.get(SECOND)).build());
66          }
67  
68          e.getChannel().write(builder.build());
69      }
70  
71      @Override
72      public void exceptionCaught(ChannelHandlerContext ctx, ExceptionEvent e) {
73          e.getCause().printStackTrace();
74          e.getChannel().close();
75      }
76  
77      private static String toString(Continent c) {
78          return c.name().charAt(0) + c.name().toLowerCase().substring(1);
79      }
80  }