如何在Spring Boot项目中将application.properties的环境属性转换为logback.groovy？ [英] How to get Environment properties from application.properties into logback.groovy in Spring Boot project?

问题描述

尝试将 application.properties / application.yml 中定义的属性注入到 中的 logback.groovy 脚本中> Spring Boot 项目。

我不能在Groovy脚本中注入 Environment 或 ApplicationContext 。

是否有任何解决方法？

我不是 寻找像 System.getProperty（'spring.profiles.active'） $ b

src / main / resources / logback.groovy



  import org.springframework.core.env.Environment 
 
 @Inject private Environment env; //这不起作用。如何让env在这里？ 
 printlnspring.profiles.active：$ {env.getProperty（'spring.profiles.active'）}
 
 appender（STDOUT，ConsoleAppender）{
编码器（PatternLayoutEncoder）{
 pattern =％green（％d {HH：mm：ss.SSS}）[％thread]％highlight（％ -  5level）％cyan（％logger {36}） - ％msg％ （spring.profiles.active）？。equalsIgnoreCase（prod））{
 root INFO ，[STDOUT，FILE] 
} else {
 root INFO，[STDOUT] 
} 
  

src / main / resources / application.yml



  --- 
 spring：
 profiles：
 active：development 
  




解决方案

logback.groovy需要非常早地进行评估，否则加载spring配置，实例化bean等的代码无法记录任何内容。这就是为什么 @Inject 无法工作。

我看到2个选项：

1. 您可以轻松地在logback.groovy中加载 application.properties ，但采用Spring提供的所有配置覆盖机制并不是微不足道的事情


2. 创建一个spring bean，用于在初始化时更改logback配置程序
   
   

另一种方法是外部化使用 -Dlogback.configurationFile = / path / to / config.groovy 生成logback配置。将配置文件放在众所周知的位置（如 / etc / my-app ）可以轻松更改生产日志级别，而无需重新部署（或重新启动）。

Trying to inject properties defined in application.properties/application.yml into logback.groovy script in Spring Boot project.

I cannot Inject Environment or ApplicationContext into groovy scripts.

Are there any workarounds?

I am not looking for solutions like System.getProperty('spring.profiles.active')

src/main/resources/logback.groovy

import org.springframework.core.env.Environment

@Inject private Environment env; //this is not working. how to get env here?
println "spring.profiles.active : ${env.getProperty('spring.profiles.active')}"

appender("STDOUT", ConsoleAppender) {
    encoder(PatternLayoutEncoder) {
        pattern = "%green(%d{HH:mm:ss.SSS}) [%thread] %highlight(%-5level) %cyan(%logger{36}) - %msg%n"
    }
}

if(System.getProperty("spring.profiles.active")?.equalsIgnoreCase("prod")) {
    root INFO, ["STDOUT", "FILE"]
} else {
    root INFO, ["STDOUT"]
}

src/main/resources/application.yml

---
spring:
    profiles:
        active: development

解决方案

logback.groovy needs to be evaluated very early because otherwise the code for loading the spring configuration, instantiating beans, etc. could not log anything. That's why @Inject can't work.

I see 2 options:

1. You could easily load application.properties in logback.groovy, but it's far from trivial to take all the configuration override mechanisms that spring provides into account
2. Create a spring bean that changes the logback configuration programmaticaly when initialized

A different approach is to externalize the logback configuration on production with -Dlogback.configurationFile=/path/to/config.groovy. Putting the config file in a well known location (like /etc/my-app) makes it easy to change log levels in production without re-deploying (or even re-starting).

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