SpringBoot四大神器之Actuator的使用小结

序

Spring Boot有四大神器，分别是auto-configuration、starters、cli、actuator，本文主要讲actuator。actuator是spring boot提供的对应用系统的自省和监控的集成功能，可以对应用系统进行配置查看、相关功能统计等。

spring-boot-starter-actuator模块的实现对于实施微服务的中小团队来说，可以有效地减少监控系统在采集应用指标时的开发量。当然，它也并不是万能的，有时候我们也需要对其做一些简单的扩展来帮助我们实现自身系统个性化的监控需求。下面，在本文中，我们将详解的介绍一些关于spring-boot-starter-actuator模块的内容，包括它的原生提供的端点以及一些常用的扩展和配置方式。

使用actuator

添加依赖

    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>

主要暴露的功能

/autoconfig

{
  "positiveMatches": {
    "AuditAutoConfiguration.AuditEventRepositoryConfiguration": [
      {
        "condition": "OnBeanCondition","message": "@ConditionalOnMissingBean (types: org.springframework.boot.actuate.audit.AuditEventRepository; SearchStrategy: all) found no beans"
      }
    ]
  },"negativeMatches": {
    "CacheStatisticsAutoConfiguration": [
      {
        "condition": "OnBeanCondition","message": "@ConditionalOnBean (types: org.springframework.cache.CacheManager; SearchStrategy: all) found no beans"
      }
    ]
  }
}

/configprops

{
  "management.health.status.CONFIGURATION_PROPERTIES": {
    "prefix": "management.health.status","properties": {
      "order": null
    }
  },"multipart.CONFIGURATION_PROPERTIES": {
    "prefix": "multipart","properties": {
      "enabled": false,"maxRequestSize": "10Mb","location": null,"fileSizeThreshold": "0","maxFileSize": "1Mb"
    }
  },"environmentEndpoint": {
    "prefix": "endpoints.env","properties": {
      "id": "env","enabled": true,"sensitive": true
    }
  }
}

/beans

[
  {
    "context": "application:8080","parent": null,"beans": [
      {
        "bean": "appMain","scope": "singleton","type": "com.xixicat.AppMain$$EnhancerBySpringCGLIB$$29382b14","resource": "null","dependencies": [ ]
      },{
        "bean": "videoInfoMapper","type": "com.xixicat.dao.VideoInfoMapper","resource": "file [/Users/xixicat/workspace/video-uber/target/classes/com/xixicat/dao/VideoInfoMapper.class]","dependencies": [
          "sqlSessionFactory"
        ]
      }
    ]
  }
]

/dump

[
  {
    "threadName": "Signal Dispatcher","threadId": 4,"blockedTime": -1,"blockedCount": 0,"waitedTime": -1,"waitedCount": 0,"lockName": null,"lockOwnerId": -1,"lockOwnerName": null,"inNative": false,"suspended": false,"threadState": "RUNNABLE","stackTrace": [ ],"lockedMonitors": [ ],"lockedSynchronizers": [ ],"lockInfo": null
  },{
    "threadName": "Reference Handler","threadId": 2,"blockedCount": 217,"waitedCount": 9,"lockName": "java.lang.ref.Reference$Lock@45de945","threadState": "WAITING","stackTrace": [
      {
        "methodName": "wait","fileName": "Object.java","lineNumber": -2,"className": "java.lang.Object","nativeMethod": true
      },{
        "methodName": "wait","lineNumber": 503,"nativeMethod": false
      },{
        "methodName": "run","fileName": "Reference.java","lineNumber": 133,"className": "java.lang.ref.Reference$ReferenceHandler","nativeMethod": false
      }
    ],"lockInfo": {
      "className": "java.lang.ref.Reference$Lock","identityHashCode": 73263429
    }
  }
]

/env

{
 profiles: [],server.ports: {
  local.server.port: 8080
 },servletContextInitParams: {},systemProperties: {
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 },systemEnvironment: {
  TERM: "xterm-256color",ZSH: "/Users/xixicat/.oh-my-zsh",GVM_BROKER_SERVICE: "http://release.gvm.io",GRIFFON_HOME: "/Users/xixicat/.gvm/griffon/current",JAVA_MAIN_CLASS_763: "org.codehaus.plexus.classworlds.launcher.Launcher",JAVA_HOME: "/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home",SHLVL: "1",MAVEN_CMD_LINE_ARGS: " spring-boot:run",__CF_USER_TEXT_ENCODING: "0x1F5:0x19:0x34",GROOVY_HOME: "/Users/xixicat/.gvm/groovy/current",XPC_FLAGS: "0x0",GVM_INIT: "true",JBAKE_HOME: "/Users/xixicat/.gvm/jbake/current",PWD: "/Users/xixicat/workspace/video-uber",GVM_DIR: "/Users/xixicat/.gvm",GVM_VERSION: "2.4.3",MAVEN_PROJECTBASEDIR: "/Users/xixicat/workspace/video-uber",LOGNAME: "xixicat",SSH_AUTH_SOCK: "/private/tmp/com.apple.launchd.93xr1duECQ/Listeners",SPRINGBOOT_HOME: "/Users/xixicat/.gvm/springboot/current",GAIDEN_HOME: "/Users/xixicat/.gvm/gaiden/current",LAZYBONES_HOME: "/Users/xixicat/.gvm/lazybones/current",OLDPWD: "/Users/xixicat/workspace/video-uber",SHELL: "/bin/zsh",JBOSSFORGE_HOME: "/Users/xixicat/.gvm/jbossforge/current",LC_CTYPE: "zh_CN.UTF-8",TMPDIR: "/var/folders/tl/xkf4nr61033gd6lk5d3llz080000gn/T/",GVM_SERVICE: "http://api.gvmtool.net",GVM_PLATFORM: "Darwin",CLASSPATH: ".:/Users/xixicat/.m2/repository/co/paralleluniverse/quasar-core/0.7.2/quasar-core-0.7.2.jar",GLIDE_HOME: "/Users/xixicat/.gvm/glide/current",PATH: "/Users/xixicat/.gvm/vertx/current/bin:/Users/xixicat/.gvm/springboot/current/bin:/Users/xixicat/.gvm/lazybones/current/bin:/Users/xixicat/.gvm/jbossforge/current/bin:/Users/xixicat/.gvm/jbake/current/bin:/Users/xixicat/.gvm/groovyserv/current/bin:/Users/xixicat/.gvm/groovy/current/bin:/Users/xixicat/.gvm/griffon/current/bin:/Users/xixicat/.gvm/grails/current/bin:/Users/xixicat/.gvm/gradle/current/bin:/Users/xixicat/.gvm/glide/current/bin:/Users/xixicat/.gvm/gaiden/current/bin:/Users/xixicat/.gvm/crash/current/bin:/Users/xixicat/.gvm/asciidoctorj/current/bin:/Users/xixicat/bin:/usr/local/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/git/bin:/Users/xixicat/devtool/maven-3.3.3/bin:/Users/xixicat/devtool/gradle-2.6/bin:/Users/xixicat/devtool/android-sdk/platform-tools",GRADLE_HOME: "/Users/xixicat/.gvm/gradle/current",GROOVYSERV_HOME: "/Users/xixicat/.gvm/groovyserv/current",GRAILS_HOME: "/Users/xixicat/.gvm/grails/current",USER: "xixicat",LESS: "-R",PAGER: "less",HOME: "/Users/xixicat",CRASH_HOME: "/Users/xixicat/.gvm/crash/current",XPC_SERVICE_NAME: "0",VERTX_HOME: "/Users/xixicat/.gvm/vertx/current",GVM_BROADCAST_SERVICE: "http://cast.gvm.io",Apple_PubSub_Socket_Render: "/private/tmp/com.apple.launchd.y6fNwP8Sk6/Render",LSCOLORS: "Gxfxcxdxbxegedabagacad",ASCIIDOCTORJ_HOME: "/Users/xixicat/.gvm/asciidoctorj/current"
 },applicationConfig: [classpath: /application.properties]: {
  pool.acquireIncrement: "1",pool.minPoolSize: "5",pool.initialPoolSize: "1",database.username: "root",pool.maxIdleTime: "60",database.url: "jdbc:mysql://127.0.0.1:3307/video_uber?autoReconnect=true&useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull",spring.jackson.dateFormat: "yyyy-MM-dd'T'HH:mm:ss",database.slave.username: "root",spring.jackson.serialization.write - dates - as - timestamps: "false",pool.idleTimeout: "30000",database.slave.url: "jdbc:mysql://127.0.0.1:3307/demo?autoReconnect=true&useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull",server.port: "8080",database.slave.password: "******",database.password: "******",database.driverClassName: "com.mysql.jdbc.Driver",pool.maxPoolSize: "50",database.dataSourceClassName: "com.mysql.jdbc.jdbc2.optional.MysqlDataSource"
 }
}

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