1. The background

One of the most common complaints about Spring component scanning and auto-weaving is that it’s hard to see how the components in your application are assembled. Is there a way to look inside your application, understand its behavior, and check its health? We’ll learn about Spring Boot’s Actuator. It provides many production-level features, such as monitoring and scaling Spring Boot applications

2. Enable the physical

To enable this, you need to add a dependency

compile 'org.springframework.boot:spring-boot-starter-actuator'
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Only a small number of health nodes are enabled by default. To see more, we can turn more on during debugging by modifying the configuration file:

management:
  endpoints:
    web:
      exposure:
        include: "*"
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Note: The formal environment must be closed.

At this time, open the web site: http://localhost:8080/actuator, you can see the following:

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2. Common use actuator endpoint

Let’s start with a bit of analysis of the popular actuator endpoint

1) Get Bean assembly report /beans

To understand the Spring context in your application, the most important endpoint is/Beans. It returns a JSON document describing each Bean in context, including its Java type and any other beans injected.

Path: http://localhost:8080/actuator/beans

You can see something like the following:

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2) Indicate health status /health

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3) Environment variable /env

The /env endpoint generates a list of all environment attributes available to the application

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4) Environment variables /mappings

The/Mappings endpoint provides such a list of all endpoints published by an application.

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5) Measure the situation

Taking a snapshot of the runtime metrics can be helpful in assessing the health of your application. Actuator provides a series of endpoints that allow you to quickly inspect your app while it’s running.

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Taking a snapshot of the runtime metrics can be helpful in assessing the health of your application. Actuator 7 provides a series of endpoints that allow you to quickly inspect your app while it’s running

3. Learn more

The Actuator contains many descriptive nodes, listed as follows:

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Reference 3.

Docs. Spring. IO/spring – the boot…

www.jianshu.com/p/d5943e303…