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.
62 lines
2.1 KiB
Java
62 lines
2.1 KiB
Java
/*
|
|
* Copyright 2012 The Netty Project
|
|
*
|
|
* The Netty Project licenses this file to you under the Apache License,
|
|
* version 2.0 (the "License"); you may not use this file except in compliance
|
|
* with the License. You may obtain a copy of the License at:
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*/
|
|
package org.jboss.netty.example.factorial;
|
|
|
|
import org.jboss.netty.buffer.ChannelBuffer;
|
|
import org.jboss.netty.buffer.ChannelBuffers;
|
|
import org.jboss.netty.channel.Channel;
|
|
import org.jboss.netty.channel.ChannelHandlerContext;
|
|
import org.jboss.netty.handler.codec.oneone.OneToOneEncoder;
|
|
|
|
import java.math.BigInteger;
|
|
|
|
/**
|
|
* Encodes a {@link Number} into the binary representation prepended with
|
|
* a magic number ('F' or 0x46) and a 32-bit length prefix. For example, 42
|
|
* will be encoded to { 'F', 0, 0, 0, 1, 42 }.
|
|
*/
|
|
public class NumberEncoder extends OneToOneEncoder {
|
|
|
|
@Override
|
|
protected Object encode(ChannelHandlerContext ctx, Channel channel, Object msg) {
|
|
if (!(msg instanceof Number)) {
|
|
// Ignore what this encoder can't encode.
|
|
return msg;
|
|
}
|
|
|
|
// Convert to a BigInteger first for easier implementation.
|
|
BigInteger v;
|
|
if (msg instanceof BigInteger) {
|
|
v = (BigInteger) msg;
|
|
} else {
|
|
v = new BigInteger(String.valueOf(msg));
|
|
}
|
|
|
|
// Convert the number into a byte array.
|
|
byte[] data = v.toByteArray();
|
|
int dataLength = data.length;
|
|
|
|
// Construct a message.
|
|
ChannelBuffer buf = ChannelBuffers.dynamicBuffer();
|
|
buf.writeByte((byte) 'F'); // magic number
|
|
buf.writeInt(dataLength); // data length
|
|
buf.writeBytes(data); // data
|
|
|
|
// Return the constructed message.
|
|
return buf;
|
|
}
|
|
}
|