Telnet Command Extension

Extension Description

All servers support telnet access for manual intervention.

Extension Interface

org.apache.dubbo.remoting.telnet.TelnetHandler

Extension Configuration

<dubbo:protocol telnet="xxx,yyy" />
<!-- Default value setting, when <dubbo:protocol> does not configure the telnet attribute, use this configuration -->
<dubbo:provider telnet="xxx,yyy" />

Known Extensions

• org.apache.dubbo.remoting.telnet.support.ClearTelnetHandler
• org.apache.dubbo.remoting.telnet.support.ExitTelnetHandler
• org.apache.dubbo.remoting.telnet.support.HelpTelnetHandler
• org.apache.dubbo.remoting.telnet.support.StatusTelnetHandler
• org.apache.dubbo.rpc.dubbo.telnet.ListTelnetHandler
• org.apache.dubbo.rpc.dubbo.telnet.ChangeTelnetHandler
• org.apache.dubbo.rpc.dubbo.telnet.CurrentTelnetHandler
• org.apache.dubbo.rpc.dubbo.telnet.InvokeTelnetHandler
• org.apache.dubbo.rpc.dubbo.telnet.TraceTelnetHandler
• org.apache.dubbo.rpc.dubbo.telnet.CountTelnetHandler
• org.apache.dubbo.rpc.dubbo.telnet.PortTelnetHandler

Extension Example

Maven project structure:

src
 |-main
    |-java
        |-com
            |-xxx
                |-XxxTelnetHandler.java (implements TelnetHandler interface)
    |-resources
        |-META-INF
            |-dubbo
                |-org.apache.dubbo.remoting.telnet.TelnetHandler (plain text file, content: xxx=com.xxx.XxxTelnetHandler)

XxxTelnetHandler.java:

package com.xxx;
 
import org.apache.dubbo.remoting.telnet.TelnetHandler;
 
@Help(parameter="...", summary="...", detail="...")
 
public class XxxTelnetHandler implements TelnetHandler {
    public String telnet(Channel channel, String message) throws RemotingException {
        // ...
    }
}

META-INF/dubbo/org.apache.dubbo.remoting.telnet.TelnetHandler:

xxx=com.xxx.XxxTelnetHandler

Command Usage

telnet 127.0.0.1 20880
dubbo> xxx args