Log Framework Adaptation and Runtime Management
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
