我想写一个netty通道的原始字节。我认为我可以这样做,首先创建一个ChannelBuffer,用字节填充(例如来自Kryo序列化程序),然后将该ChannelBuffer写入netty Channel。写一个ChannelBuffer到一个Netty通道抛出java.io.NotSerializableException
下面是相关的代码,在那里我只是填一些字节到一个在ChannelBuffer类型的构造函数,并试图在连接到发送:
/**
* Handler implementation for the object echo client. It initiates the
* ping-pong traffic between the object echo client and server by sending the
* first message to the server.
*/
public class ObjectEchoClientHandler extends SimpleChannelUpstreamHandler {
private final ChannelBuffer firstMessage;
/**
* Creates a client-side handler.
*/
public ObjectEchoClientHandler(int firstMessageSize) {
if (firstMessageSize <= 0) {
throw new IllegalArgumentException(
"firstMessageSize: " + firstMessageSize);
}
firstMessage = ChannelBuffers.buffer(8192);
for (int i = 0; i < firstMessageSize; i++) {
firstMessage.writeByte(i % 256);
}
}
@Override
public void channelConnected(
ChannelHandlerContext ctx, ChannelStateEvent e) {
// Send the first message if this handler is a client-side handler.
// e.getChannel().write(firstMessage);
Channels.write(ctx, e.getFuture(), firstMessage);
}
}
这似乎并没有工作,因为它会引发此异常:
java.io.NotSerializableException: org.jboss.netty.buffer.BigEndianHeapChannelBuffer
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1164)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
at org.jboss.netty.handler.codec.serialization.ObjectEncoder.encode(ObjectEncoder.java:80)
at org.jboss.netty.handler.codec.oneone.OneToOneEncoder.handleDownstream(OneToOneEncoder.java:61)
at org.jboss.netty.channel.Channels.write(Channels.java:626)
at org.jboss.netty.channel.Channels.write(Channels.java:587)
at ca.gsimard.spacecraft.client.ObjectEchoClientHandler.channelConnected(ObjectEchoClientHandler.java:83)
at ca.gsimard.spacecraft.client.ObjectEchoClientHandler.handleUpstream(ObjectEchoClientHandler.java:75)
at org.jboss.netty.channel.Channels.fireChannelConnected(Channels.java:227)
at org.jboss.netty.channel.socket.nio.NioWorker$RegisterTask.run(NioWorker.java:784)
at org.jboss.netty.channel.socket.nio.NioWorker.processRegisterTaskQueue(NioWorker.java:250)
at org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:192)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
我敢肯定,这是死的小事,也许这样做的错误的方式,因为我似乎无法找到任何人谁了同样的错误,因为这。我现在使用Netty 3.3.0。
我可以通过创建一个正确大小的byte []并将ChannelBuffer的内容复制到它来工作,但我希望有一个更直接的解决方案来避免无用的字节复制。
byte[] array = new byte[firstMessage.writerIndex()];
firstMessage.readBytes(array);
e.getChannel().write(array);
感谢您的指点!
现在,我浏览netty的源代码和文档,这一切都很有意义。谢谢 ! – gsimard