Pass Dynamic Port from Gradle boot:run of an application

Question

I am having an application, which is running on some port(ex-8080) now when I start this application using gradlew I want to pass dynamic port to start the application?

./gradlew :testApplication:bootRun

is there anyway to pass the dynamic port here??

Possible duplicate of [How to change the port of a Spring Boot application using Gradle?](https://stackoverflow.com/questions/47198100/how-to-change-the-port-of-a-spring-boot-application-using-gradle) — Helder Pereira, Dec 12 '20 at 13:37

score 4 · Answer 1 · edited Oct 23 '19 at 18:57

4

Add the following to build.gradle so that we can pass parameters to gradlew along to the underlying java command:

bootRun {
    if (project.hasProperty('args')) {
        args project.args.split(',')
    }
}

Pass the arguments you would normally send to a java command (in this case, overriding the server.port) as -Pargs to gradlew:

/gradlew :testApplication:bootRun -Pargs="--server.port=8081"

What is here:

When you run java with arguments --server.port=8081, Spring Boot will override default property (e.g. Spring Boot will ignore your port in properties file, it will use value from command line
-Pargs is the way to ask bootRun to command line arguments. See details here.

See also the same question for maven.

edited Oct 23 '19 at 18:57

Chris Trevarthen

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answered Nov 17 '18 at 13:58

Manushin Igor

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2

Thanks for the info, -Pargs is not considering, I added the below things and it started working. bootRun { systemProperties = System.properties } and then passed -Dserver.port=8081 and It started working. I have another question , Can I able to modify the custom value specified in application.properties by passing the argument in gradlew bootRun? example in application.properties there is a variable call test.url="http:localhost:8081"now I am running the gradlew :testApplication:bootRun and here I wanna modify the content of test.url, is this possible? – Ashwini Jha Nov 17 '18 at 16:19

Guilherme Alencar · Answer 2 · 2019-06-04T19:18:48.580

1

I couldn't pass the port directly.

But if you want a workaround, do the following:

Build the application with gradle build.
Navigate in your project and open the directory build/libs
Now you have to see the jar of your project and then run this command java -jar yourJarProject.jar --server.port=8081.

edited Jun 04 '19 at 19:18

answered Apr 16 '19 at 18:12

Guilherme Alencar

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Pass Dynamic Port from Gradle boot:run of an application

2 Answers2