JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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How to declare a task that depends on other task?


You can declare tasks that depend on other tasks. All you need to do is, use dependsOn keyword to declare dependent tasks. The dependent tasks will be executed first before executing requested task. Look at below example, how we have declared build task dependency with test task:

task test << {
        println 'i am a test task'
}
task build(dependsOn: test) << {
        println "i am build depends on test"
}

Run command gradle build on command-line:

java2novice$ gradle build
:test
i am a test task
:build
i am build depends on test

BUILD SUCCESSFUL

Total time: 1.701 secs

How to declare if your task depends on multiple tasks? It's simple, you can declare multiple tasks seperated by comma, and enclosed with in '[]', here is an example how to declare multiple dependencies:

task clean << {
        println 'i am a clean task'
}
task test << {
        println 'i am a test task'
}
task build(dependsOn: [clean, test]) << {
        println "i am build depends on test"
}

Run command gradle build on command-line:

java2novice$ gradle build
:clean
i am a clean task
:test
i am a test task
:build
i am build depends on test

BUILD SUCCESSFUL

Total time: 2.657 secs

Reference: Gradle Documentation

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Gradle configuration examples

  1. Gradle Installation Steps
  2. What is gradle project and task
  3. What is build.gradle file?
  4. How to avoid gradle log messages?
  5. How to define default tasks in Gradle?
  6. How to list all gradle tasks?
  7. How to list gradle project properties?
  8. How to declare a task that depends on other task?
  9. How to create dynamic tasks in Gradle?
  10. How to exclude a task in gradle?
  11. How to create java project in gradle?
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Preemptive scheduling Vs Time slicing?
Preemptive scheduling: The highest priority task executes until it enters the waiting or dead states or a higher priority task comes into existence.

Time slicing: A task executes for a predefined slice of time and then reenters the pool of ready tasks. The scheduler then determines which task should execute next, based on priority and other factors.
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About Author

I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment.

If you come across any mistakes or bugs, please email me to [email protected].

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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java™ Platform Standard Ed. 8 - API Specification | Java is registered trademark of Oracle.
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