I want to run my main
method via gradle task
This is how I run via the cmd:
java -cp RTMonitor.jar com.bla.MainRunner first_arg
how should it be written in gradle?
run { args += ['java -cp RTMonitor.jar com.bla.MainRunner first_arg'] }
Update
I have tried
task myRun(type: JavaExec) { classpath configurations.main main = "com.bla.runners.StatsLogGenerator" args "arg1", "arg2" }
and I got:
Error:(71, 0) Could not find property 'main' on configuration container.
the I have tried: task myRun(type: JavaExec) { classpath "configurations.main" main = "com.bla.runners.StatsLogGenerator" args "arg1", "arg2" }
and i got an error:
FAILURE: Build failed with an exception. 17:49:21.855 [ERROR] [org.gradle.BuildExceptionReporter] 17:49:21.856 [ERROR] [org.gradle.BuildExceptionReporter] * What went wrong: 17:49:21.856 [ERROR] [org.gradle.BuildExceptionReporter] Execution failed for task ':myRun'. 17:49:21.856 [ERROR] [org.gradle.BuildExceptionReporter] > Process 'command '/Library/Java/JavaVirtualMachines/jdk1.8.0_25.jdk/Contents/Home/bin/java'' finished with non-zero exit value 1 17:49:21.864 [ERROR] [org.gradle.BuildExceptionReporter] 17:49:21.865 [ERROR] [org.gradle.BuildExceptionReporter] * Exception is: 17:49:21.866 [ERROR] [org.gradle.BuildExceptionReporter] org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':myRun'. 17:49:21.867 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:69) 17:49:21.882 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.process.internal.DefaultExecHandle$ExecResultImpl.assertNormalExitValue(DefaultExecHandle.java:361) 17:49:21.882 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.process.internal.DefaultJavaExecAction.execute(DefaultJavaExecAction.java:31)
but when I run via Intellij, every thig works OK
If you want it to be a separate process that you can call repeatedly using the same process, it seems more like a daemon or service. Gradle's JavaExec merely supports the equivalent of calling the java command from the shell. That is, it will run the main method of the class you specify once.
The easiest is probably to use application plugin. Add apply plugin: 'application'
to your build.gradle and set mainClassName = com.bla.MainRunner
. To add arguments to your main class modify the run task and edit the args property
run { args += 'first_arg' }
Classpath is taken automatically from main sourceSet, if you want different one, you can edit classpath property of the run task.
If you need more customization, you can define your own task of type JavaExec like this
task myRun(type: JavaExec) { classpath sourceSets.main.runtimeClasspath main = "com.bla.MainRunner" args "arg1", "arg2" }
task run(type: JavaExec) { group = 'Run' // <-- change the name as per your need description = 'Small description what this run will do' classpath sourceSets.main.runtimeClasspath // <-- Don't change this main = "com.mypackage.myclassNameContaingMainMethod" args "arg1", "arg2" }
This is a independent registered task and can also have group and description and other properties of task.
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