Network Transport Extension

<!-- Server and client use the same transport implementation -->
<dubbo:protocol transporter="xxx" /> 
<!-- Server and client use different transport implementations -->
<dubbo:protocol server="xxx" client="xxx" /> 
<!-- Default settings, used when <dubbo:protocol> does not configure transporter/server/client attributes -->
<dubbo:provider transporter="xxx" server="xxx" client="xxx" />

src
 |-main
    |-java
        |-com
            |-xxx
                |-XxxTransporter.java (implements Transporter interface)
                |-XxxServer.java (implements Server interface)
                |-XxxClient.java (implements Client interface)
    |-resources
        |-META-INF
            |-dubbo
                |-org.apache.dubbo.remoting.Transporter (plain text file, contents: xxx=com.xxx.XxxTransporter)

package com.xxx;
 
import org.apache.dubbo.remoting.Transporter;
 
public class XxxTransporter implements Transporter {
    public Server bind(URL url, ChannelHandler handler) throws RemotingException {
        return new XxxServer(url, handler);
    }
    public Client connect(URL url, ChannelHandler handler) throws RemotingException {
        return new XxxClient(url, handler);
    }
}

package com.xxx;
 
import org.apache.dubbo.remoting.transport.transporter.AbstractServer;
 
public class XxxServer extends AbstractServer {
    public XxxServer(URL url, ChannelHandler handler) throws RemotingException{
        super(url, handler);
    }
    protected void doOpen() throws Throwable {
        // ...
    }
    protected void doClose() throws Throwable {
        // ...
    }
    public Collection<Channel> getChannels() {
        // ...
    }
    public Channel getChannel(InetSocketAddress remoteAddress) {
        // ...
    }
}

package com.xxx;
 
import org.apache.dubbo.remoting.transport.transporter.AbstractClient;
 
public class XxxClient extends AbstractClient {
    public XxxServer(URL url, ChannelHandler handler) throws RemotingException{
        super(url, handler);
    }
    protected void doOpen() throws Throwable {
        // ...
    }
    protected void doClose() throws Throwable {
        // ...
    }
    protected void doConnect() throws Throwable {
        // ...
    }
    public Channel getChannel() {
        // ...
    }
}

xxx=com.xxx.XxxTransporter