ba28679775
Motivation:
The examples have not been updated since long time ago, showing various
issues fixed in this commit.
Modifications:
- Overall simplification to reduce LoC
- Use system properties to get options instead of parsing args.
- Minimize option validation
- Just use System.out/err instead of Logger
- Do not pass config as parameters - just access it directly
- Move the main logic to main(String[]) instead of creating a new
instance meaninglessly
- Update netty-build-21 to make checkstyle not complain
- Remove 'throws Exception' clause if possible
- Line wrap at 120 (previously at 80)
- Add an option to enable SSL for most examples
- Use ChannelFuture.sync() instead of await()
- Use System.out for the actual result. Use System.err otherwise.
- Delete examples that are not very useful:
- websocket/html5
- websocketx/sslserver
- localecho/multithreaded
- Add run-example.sh which simplifies launching an example from command
line
Result:
Shorter and simpler examples. A user can focus more on what it actually
does than miscellaneous stuff. A user can launch an example very
easily.
116 lines
4.0 KiB
Java
116 lines
4.0 KiB
Java
/*
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* Copyright 2012 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package org.jboss.netty.example.localtime;
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import org.jboss.netty.channel.Channel;
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import org.jboss.netty.channel.ChannelEvent;
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import org.jboss.netty.channel.ChannelHandlerContext;
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import org.jboss.netty.channel.ChannelStateEvent;
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import org.jboss.netty.channel.ExceptionEvent;
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import org.jboss.netty.channel.MessageEvent;
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import org.jboss.netty.channel.SimpleChannelUpstreamHandler;
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import org.jboss.netty.example.localtime.LocalTimeProtocol.Continent;
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import org.jboss.netty.example.localtime.LocalTimeProtocol.LocalTime;
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import org.jboss.netty.example.localtime.LocalTimeProtocol.LocalTimes;
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import org.jboss.netty.example.localtime.LocalTimeProtocol.Location;
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import org.jboss.netty.example.localtime.LocalTimeProtocol.Locations;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.Formatter;
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import java.util.List;
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import java.util.concurrent.BlockingQueue;
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import java.util.concurrent.LinkedBlockingQueue;
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import java.util.regex.Pattern;
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public class LocalTimeClientHandler extends SimpleChannelUpstreamHandler {
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private static final Pattern DELIM = Pattern.compile("/");
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// Stateful properties
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private volatile Channel channel;
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private final BlockingQueue<LocalTimes> answer = new LinkedBlockingQueue<LocalTimes>();
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public List<String> getLocalTimes(Collection<String> cities) {
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Locations.Builder builder = Locations.newBuilder();
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for (String c: cities) {
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String[] components = DELIM.split(c);
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builder.addLocation(Location.newBuilder().
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setContinent(Continent.valueOf(components[0].toUpperCase())).
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setCity(components[1]).build());
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}
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channel.write(builder.build());
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LocalTimes localTimes;
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boolean interrupted = false;
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for (;;) {
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try {
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localTimes = answer.take();
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break;
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} catch (InterruptedException e) {
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interrupted = true;
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}
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}
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if (interrupted) {
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Thread.currentThread().interrupt();
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}
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List<String> result = new ArrayList<String>();
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for (LocalTime lt: localTimes.getLocalTimeList()) {
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result.add(
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new Formatter().format(
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"%4d-%02d-%02d %02d:%02d:%02d %s",
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lt.getYear(),
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lt.getMonth(),
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lt.getDayOfMonth(),
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lt.getHour(),
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lt.getMinute(),
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lt.getSecond(),
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lt.getDayOfWeek().name()).toString());
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}
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return result;
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}
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@Override
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public void handleUpstream(ChannelHandlerContext ctx, ChannelEvent e) throws Exception {
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if (e instanceof ChannelStateEvent) {
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System.err.println(e);
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}
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super.handleUpstream(ctx, e);
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}
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@Override
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public void channelOpen(ChannelHandlerContext ctx, ChannelStateEvent e) throws Exception {
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channel = e.getChannel();
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super.channelOpen(ctx, e);
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}
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@Override
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public void messageReceived(ChannelHandlerContext ctx, final MessageEvent e) {
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answer.add((LocalTimes) e.getMessage());
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}
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@Override
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public void exceptionCaught(ChannelHandlerContext ctx, ExceptionEvent e) {
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e.getCause().printStackTrace();
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e.getChannel().close();
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}
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}
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