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What is Spring Actuator? What are its advantages?

Deepika Sahu answered on December 24, 2022 Popularity 2/10 Helpfulness 1/10

answer What is Spring Actuator? What are its advantages?

What is Spring Actuator? What are its advantages?

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ring Actuator is another cool Spring Boot feature which allows seeing inside a running application.

Yes, you read it correctly.
It allows you to see inside an application.
Since Spring Boot is all about auto-configuration it makes debugging difficult and at some point in time, you want to know which beans are created in Spring's Application Context and how Controllers are mapped. 
Spring Actuator provides all that information.

It provides several endpoints e.g. a REST endpoint to retrieve this kind of information over the web.
It also provides a lot of insight and metrics about application health e.g. CPU and memory usage, number of threads etc.

It also comes with a remote shell which you can use to securely go inside Spring Boot application and run some command to expose the same set of data. 
You can even use JMX to control this behavior at runtime.

Btw, it's important to secure your Spring Actuator endpoints because it exposes a lot of confidential information and a potentially dangerous one-two. 
For example, by using /showdown endpoint you can kill a Spring Boot application.

But, don't worry. You can use Spring Security to secure Spring Actuator endpoints.

Read more: https://www.java67.com/2018/06/top-15-spring-boot-interview-questions-answers-java-jee-programmers.html#ixzz7oQ2jwWEn

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Contributed on Dec 24 2022

Deepika Sahu

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What is Spring Actuator? What are its advantages?

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