package com.manning.nettyinaction.chapter4;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelFutureListener;
import io.netty.util.CharsetUtil;
import java.util.concurrent.Executor;
import java.util.concurrent.Executors;
/**
* Listing 4.5 and 4.6 of <i>Netty in Action</i>
*
* @author <a href="mailto:nmaurer@redhat.com">Norman Maurer</a>
*/
public class ChannelOperationExamples {
/**
* Listing 4.5
*/
public static void writingToChannel() {
Channel channel = null; // Get the channel reference from somewhere
ByteBuf buf = Unpooled.copiedBuffer("your data", CharsetUtil.UTF_8);
ChannelFuture cf = channel.write(buf);
cf.addListener(new ChannelFutureListener() {
@Override
public void operationComplete(ChannelFuture future) {
if (future.isSuccess()) {
System.out.println("Write successful");
} else {
System.err.println("Write error");
future.cause().printStackTrace();
}
}
});
}
/**
* Listing 4.6
*/
public static void writingToChannelManyThreads() {
final Channel channel = null; // Get the channel reference from somewhere
final ByteBuf buf = Unpooled.copiedBuffer("your data",
CharsetUtil.UTF_8);
Runnable writer = new Runnable() {
@Override
public void run() {
channel.write(buf.duplicate());
}
};
Executor executor = Executors.newCachedThreadPool();
// write in one thread
executor.execute(writer);
// write in another thread
executor.execute(writer);
}
}