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.
84 lines
3.2 KiB
Java
84 lines
3.2 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.bootstrap.ClientBootstrap;
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import org.jboss.netty.channel.Channel;
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import org.jboss.netty.channel.ChannelFuture;
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import org.jboss.netty.channel.socket.nio.NioClientSocketChannelFactory;
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import org.jboss.netty.handler.ssl.SslContext;
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import org.jboss.netty.handler.ssl.util.InsecureTrustManagerFactory;
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import java.net.InetSocketAddress;
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import java.util.Arrays;
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import java.util.List;
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import java.util.concurrent.Executors;
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/**
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* Sends a list of continent/city pairs to a {@link LocalTimeServer} to
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* get the local times of the specified cities.
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*/
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public final class LocalTimeClient {
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static final boolean SSL = System.getProperty("ssl") != null;
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static final String HOST = System.getProperty("host", "127.0.0.1");
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static final int PORT = Integer.parseInt(System.getProperty("port", "8463"));
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static final List<String> CITIES = Arrays.asList(System.getProperty(
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"cities", "Asia/Seoul,Europe/Berlin,America/Los_Angeles").split(","));
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public static void main(String[] args) throws Exception {
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// Configure SSL.
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final SslContext sslCtx;
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if (SSL) {
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sslCtx = SslContext.newClientContext(InsecureTrustManagerFactory.INSTANCE);
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} else {
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sslCtx = null;
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}
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ClientBootstrap bootstrap = new ClientBootstrap(
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new NioClientSocketChannelFactory(
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Executors.newCachedThreadPool(),
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Executors.newCachedThreadPool()));
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try {
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// Configure the event pipeline factory.
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bootstrap.setPipelineFactory(new LocalTimeClientPipelineFactory(sslCtx));
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// Make a new connection.
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ChannelFuture connectFuture = bootstrap.connect(new InetSocketAddress(HOST, PORT));
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// Wait until the connection is made successfully.
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Channel channel = connectFuture.sync().getChannel();
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// Get the handler instance to initiate the request.
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LocalTimeClientHandler handler = channel.getPipeline().get(LocalTimeClientHandler.class);
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// Request and get the response.
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List<String> response = handler.getLocalTimes(CITIES);
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// Close the connection.
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channel.close().sync();
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// Print the response at last but not least.
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for (int i = 0; i < CITIES.size(); i ++) {
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System.out.format("%28s: %s%n", CITIES.get(i), response.get(i));
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}
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} finally {
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// Shut down all thread pools to exit.
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bootstrap.releaseExternalResources();
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}
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}
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}
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