Spring Boot Actuator – Application Monitoring Made Easy

Spring Boot Actuator helps you manage and monitor your applications using various way like HTTP, JMX and SSH. It allows you to monitor various aspects of your application.
Actuator exposes various endpoint to provides different details about environment and application. Following are the endpoints exposed.

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All the endpoint can be accessed using <host>:port/endpoint for e.g.  http://localhost:8080/info , http://localhost:8080/health
1.actuator – This display all the endpoint available. This is disabled by default though. To enable this you need to add spring-hateoas dependency in your application pom.xml
<dependency>
<groupId>org.springframework.hateoas</groupId>
<artifactId>spring-hateoas</artifactId>
</dependency>
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2.autoconfig – This display auto-configuration report for your application
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3.beans – Display all beans in your application
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4.configprops – Display the configuration properties that are defined by the @ConfigurationProperties beans.
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5.docs –  Display documentation for spring actuator. Need acutator-docs dependency in application pom.xml
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-actuator-docs</artifactId>
</dependency>
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6.dump – Display thread dump. For e.g. running thread, stacktrace etc.
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7.env – Display all the properties from the Spring’s ConfigurableEnvironment.
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8.health – Display application health information like status, diskspace etc.
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9.metrics – Display metrics of the current application. For e.g. memory used, memory available, uptime of your application, number of threads etc.
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10.info – display information about application. Custom value can be configured in application.properties file. See example below.
info.app.name=Spring Boot Web Actuator Application
info.app.description=This is an example of the Actuator module
info.app.version=1.0.0
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11.mappings – Display all the mapping for RequestMapping.
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12.trace – Display trace information. For e.g. request made.
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13.flyway – Display information about database migration scripts
14.liquidbase – Display liquidbase database migration if applied. To enable this endpoint add following liquibase-core  dependency in your application pom.xml
<dependency>
<groupId>org.liquibase</groupId>
<artifactId>liquibase-core</artifactId>
</dependency>
15.logfile – Returns the contents of the logfile. Logfile should be specified in application.properties file usinf logging.file or logging.path
16.shutdown – Shutdown application. By default it is not enabled.  To enable this endpoint add following in application.properties
endpoints.shutdown.enabled=true