How to change dependent jar at runtime in a Spring application without restarting the application itself?

user_3706616 0
Viewed 119

Context

Let's say we have a Spring app (spring.jar) dependent on lib.jar. This jar would have a method String getData(). This method would return the letter "A".

We would run the spring app with the following command:

java -cp "spring.jar:lib.jar" Main

After the spring application starts successfully, we can test it and surely we see that Spring shows the letter 'A' from the lib.jar.

The Question

Is there anyway to override the lib.jar (that will return now the letter 'B') and have this reflected in the spring server without restarting it?

runtime dependencies spring java
1 Answers

In the pom.xml file add the spring dev tools dependency. This allows you run the application after any changes without restarting the application

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<version>2.3.12.RELEASE</version>
</dependency>
user_164332330
Related