spring - 为什么我会得到这个 "CONDITION EVALUATION DELTA"输出？

Question

我在我的服务器上进行了一些更改，但我不知道这些更改中的哪些会导致此日志输出:

==========================
CONDITION EVALUATION DELTA
==========================


Positive matches:
-----------------

    None


Negative matches:
-----------------

   SpringBootWebSecurityConfiguration:
      Did not match:
         - @ConditionalOnMissingBean (types: org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter; SearchStrategy: all) found beans of type 'org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter' org.springframework.security.oauth2.config.annotation.web.configuration.AuthorizationServerSecurityConfiguration, org.springframework.security.oauth2.config.annotation.web.configuration.ResourceServerConfiguration, webSecurityConfig (OnBeanCondition)
      Matched:
         - @ConditionalOnClass found required class 'org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter' (OnClassCondition)
         - found 'session' scope (OnWebApplicationCondition)

   UserDetailsServiceAutoConfiguration:
      Did not match:
         - @ConditionalOnMissingBean (types: org.springframework.security.authentication.AuthenticationManager,org.springframework.security.authentication.AuthenticationProvider,org.springframework.security.core.userdetails.UserDetailsService; SearchStrategy: all) found beans of type 'org.springframework.security.authentication.AuthenticationManager' authenticationManager and found beans of type 'org.springframework.security.core.userdetails.UserDetailsService' appUserDetailsService and found beans of type 'org.springframework.security.authentication.AuthenticationProvider' daoAuthenticationProvider (OnBeanCondition)
      Matched:
         - @ConditionalOnClass found required class 'org.springframework.security.authentication.AuthenticationManager' (OnClassCondition)

   WebSecurityEnablerConfiguration:
      Did not match:
         - @ConditionalOnMissingBean (names: springSecurityFilterChain; SearchStrategy: all) found beans named springSecurityFilterChain (OnBeanCondition)
      Matched:
         - found 'session' scope (OnWebApplicationCondition)


Exclusions:
-----------

    None


Unconditional classes:
----------------------

    None

这真的没有告诉我任何事情。

它甚至意味着什么？是不是有什么东西坏了，因为服务器仍然工作正常。

Answer 1

条件评估增量是 Spring Boot 的 DevTools 的一个特性。它在 the documentation 中描述如下:

By default, each time your application restarts, a report showing the condition evaluation delta is logged. The report shows the changes to your application’s auto-configuration as you make changes such as adding or removing beans and setting configuration properties.

在您的问题中显示的情况下，对影响安全自动配置的安全相关 bean 进行了一些更改。没有什么坏掉的。输出试图帮助您了解您对应用程序所做的更改如何影响其自动配置。

如果您愿意，您可以关闭 delta 的日志记录。为此，请设置以下属性:

spring.devtools.restart.log-condition-evaluation-delta=false