How to set system property using gradle?

Question

I was wondering if it's possible to set a system property, for a Java application, using Gradle?

I tried using gradle.properties file and defining a property as

systemProp.name = my name

but then when I try to get that property from a Java application using

System.getProperty("name")

that property is not found.

build.gradle and gradle.properties are in root folder of the project.

This is what my build.gradle looks like:

apply plugin: 'war'
apply plugin: 'appengine'

buildscript {
    repositories {
        mavenCentral()
    }

    dependencies {
        classpath 'com.google.appengine:gradle-appengine-plugin:1.8.6'
    }
}

appengine {
    httpPort = 8081
}

repositories {
    mavenCentral()
}

dependencies {
    compile group: 'com.google.inject', name: 'guice', version: '3.0'
    compile group: 'com.google.inject.extensions', name: 'guice-servlet', version: '3.0'
    compile group: 'javax.servlet', name: 'servlet-api', version: '2.5'
    compile group: 'org.hibernate', name: 'hibernate-entitymanager', version: '4.2.0.Final'
    compile group: 'mysql', name: 'mysql-connector-java', version: '5.1.27'
    compile 'com.google.protobuf:protobuf-java:2.5.0'
    compile 'com.google.appengine:appengine-api-1.0-sdk:1.8.6'
    compile 'com.google.template:soy:2012-12-21'
    compile 'org.json:json:20090211'
}

And this is what my build.properties look like:

systemProp.firstName=Marko
systemProp.lastName=Vuksanovic

This is part of an AppEngine application and I run it using the following command:

gradle appengineRun

How does your build code look like that runs the Java app? Please post your `build.gradle`. — Benjamin Muschko, Dec 18 '13 at 17:07

score 14 · Answer 1 · answered Sep 09 '16 at 23:38

14

This is how I do it, setting props for Selenide test framework:

test {
    systemProperty "browser", "chrome"
    systemProperty "webdriver.chrome.driver", "$projectDir/drivers/chromedriver"
}

answered Sep 09 '16 at 23:38

djangofan

28,471
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score 13 · Answer 2 · answered Jun 25 '15 at 18:29

13

I just stumbled on this for use with the gradle application plugin. Add to the run task. Works great:

run {   
    systemProperties['MYPROP'] = '/my/prop/value'
}

answered Jun 25 '15 at 18:29

Fred Toth

213
2
11

7

This doesn't work for me, getting `> Could not find method run() for arguments [build_3q2qbgis9k2n97muogsnwks4i$_run_closure5@3172da27]` – birgersp Jun 02 '17 at 13:38
@birgersp The answer mentions `gradle application plugin`. Just add this plugin to your `build.gradle`. – VadimBelov Dec 12 '20 at 12:00

score 9 · Answer 3 · edited Dec 20 '20 at 10:25

9

This is what worked for me (using Kotlin DSL):

tasks.withType<JavaExec> {
        systemProperty("key", "value")
}

edited Dec 20 '20 at 10:25

Adrian Mole

49,934
160
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answered Dec 20 '20 at 09:40

shduke

91
1
6

kukido · Accepted Answer · 2013-12-19T04:50:42.937

The system property set in gradle.properties will be available only in JVM where Gradle is running.

From gradle-appengine-plugin documentation:

appengineRun: Starts a local development server running your project code.

jvmFlags: The JVM flags to pass on to the local development server.

If you need your system properties to be available in app engine, which is separate JVM, you should use jvmFlags property.

Explicitly:

appengine {
    jvmFlags = ['-DfirstName=Marko', '-DlastName=Vuksanovic']
}

With gradle.properties:

appengine {
    jvmFlags = ['-DfirstName=$firstName', '-DlastName=$lastName']
}

How to set system property using gradle?

4 Answers4

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