Boost Java Spring Boot Performance with Mica-Log4j2’s Asynchronous Logging

Feature Introduction

Separate log configurations for environments dev, test, ontest, prod.

High‑performance asynchronous logging based on Disruptor.

In non‑dev environments, replace System.out and System.err with log calls to improve performance.

Dependency Coordinates

Maven

<dependency>
    <groupId>net.dreamlu</groupId>
    <artifactId>mica-log4j2</artifactId>
</dependency>

Gradle

implementation "net.dreamlu:mica-log4j2"

System Configuration

Configuration item LOGGING_PATH defaults to the directory next to the JAR; it specifies the log directory and reads the system environment variable.

Rules

Logs are written to info.log and error.log respectively.

Note: In Spring Boot Admin monitoring, the default displayed file is info.log.

Custom Log Level

logging:
  level:
    org.xxx.xxx: error

Custom Log Configuration

Place each environment’s log configuration under resources/log:

resources
    └── log
        ├── log4j2_dev.xml
        ├── log4j2_ontest.xml
        ├── log4j2_prod.xml
        └── log4j2_test.xml

Open Source Recommendations

Spring Boot microservice toolkit – Mica: https://gitee.com/596392912/mica pig – powerful microservice framework: https://gitee.com/log4j/pig SpringBlade – complete production solution: https://gitee.com/smallc/SpringBlade

Join the “如梦技术” Spring QQ group 479710041 for more information.