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.
85 lines
2.9 KiB
Java
85 lines
2.9 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.objectecho;
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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.ChannelState;
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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 java.util.ArrayList;
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import java.util.List;
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import java.util.concurrent.atomic.AtomicLong;
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/**
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* Handler implementation for the object echo client. It initiates the
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* ping-pong traffic between the object echo client and server by sending the
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* first message to the server.
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*/
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public class ObjectEchoClientHandler extends SimpleChannelUpstreamHandler {
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private final List<Integer> firstMessage;
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private final AtomicLong transferredMessages = new AtomicLong();
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/**
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* Creates a client-side handler.
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*/
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public ObjectEchoClientHandler(int firstMessageSize) {
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if (firstMessageSize <= 0) {
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throw new IllegalArgumentException("firstMessageSize: " + firstMessageSize);
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}
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firstMessage = new ArrayList<Integer>(firstMessageSize);
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for (int i = 0; i < firstMessageSize; i ++) {
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firstMessage.add(i);
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}
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}
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public long getTransferredMessages() {
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return transferredMessages.get();
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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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((ChannelStateEvent) e).getState() != ChannelState.INTEREST_OPS) {
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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 channelConnected(ChannelHandlerContext ctx, ChannelStateEvent e) {
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// Send the first message if this handler is a client-side handler.
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e.getChannel().write(firstMessage);
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}
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@Override
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public void messageReceived(ChannelHandlerContext ctx, MessageEvent e) {
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// Echo back the received object to the server.
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transferredMessages.incrementAndGet();
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e.getChannel().write(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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