Log Framework Adaptation and Runtime Management

Adapt to the log framework in Dubbo and support dynamic switching of the log framework used at runtime

Feature description

Adaptation of log frameworks. Since 2.2.1, dubbo has built-in adaptation of log4j, slf4j, jcl, and jdk log frameworks.

Log framework runtime management, starting from 3.0.10, dubbo-qos runtime management supports query log configuration and dynamically modify the used log framework and log level.

The log configuration modified by dubbo-qos is not stored persistently, and will become invalid after the application is restarted.

scenes to be used

How to use

Log framework adaptation

The logging output policy can be explicitly configured in the following ways

1. Command line

java -Ddubbo.application.logger=log4j

2. Specify in dubbo.properties

dubbo.application.logger=log4j

3. Configuration in dubbo.xml

<dubbo:application logger="log4j" />

For custom extensions, please refer to Log Adapter Extension

Logging framework runtime management

1. Query log configuration

Command: loggerInfo

example

> telnet 127.0.0.1 22222
> loggerInfo

output

Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
   ___ __ __ ___ ___ ____
  / _ \ / / / // _ ) / _ ) / __ \
 / // // /_/ // _ |/ _ |/ /_/ /
/____/ \____//____//____/ \____/
dubbo>loggerInfo
Available logger adapters: [jcl, jdk, log4j, slf4j]. Current Adapter: [log4j]. Log level: INFO

2. Modify log level

Command: switchLogLevel {level}

level: ALL, TRACE, DEBUG, INFO, WARN, ERROR, OFF

example

> telnet 127.0.0.1 22222
> switchLogLevel WARN

output

Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
   ___ __ __ ___ ___ ____
  / _ \ / / / // _ ) / _ ) / __ \
 / // // /_/ // _ |/ _ |/ /_/ /
/____/ \____//____//____/ \____/
dubbo>loggerInfo
Available logger adapters: [jcl, jdk, log4j, slf4j]. Current Adapter: [log4j]. Log level: INFO
dubbo>switchLogLevel WARN
OK
dubbo>loggerInfo
Available logger adapters: [jcl, jdk, log4j, slf4j]. Current Adapter: [log4j]. Log level: WARN```

3. Modify the log output framework

Command: switchLogger {loggerAdapterName}

loggerAdapterName: slf4j, jcl, log4j, jdk, log4j2

example

> telnet 127.0.0.1 22222
> switchLogger slf4j

output

Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
   ___ __ __ ___ ___ ____
  / _ \ / / / // _ ) / _ ) / __ \
 / // // /_/ // _ |/ _ |/ /_/ /
/____/ \____//____//____/ \____/
dubbo>loggerInfo
Available logger adapters: [jcl, slf4j, log4j, jdk]. Current Adapter: [log4j]. Log level: INFO
dubbo>switchLogger slf4j
OK
dubbo>loggerInfo
Available logger adapters: [jcl, slf4j, log4j, jdk]. Current Adapter: [slf4j]. Log level: INFO
Last modified September 10, 2024: Fix link (4bf72710e12)