Checkpoint

A checkpoint is a class and method marker, and it is used when you want a piece of code, even if executed by several independent processes, to be executed only once.

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❇ Introduction

If you need to know if a piece of code has already been executed by another process, then this is the perfect library for you. A checkpoint is a class and method marker, and it is used when you want a piece of code, even if executed by several independent processes, to be executed only once.

❓ How to use

1. Add one of the options below to the pom.xml file:

Using Maven Central (recomended):

<dependency>
  <groupId>io.github.wniemiec-task-java</groupId>
  <artifactId>checkpoint</artifactId>
  <version>LATEST</version>
</dependency>

Using GitHub Packages:

<dependency>
  <groupId>wniemiec.task.java</groupId>
  <artifactId>checkpoint</artifactId>
  <version>LATEST</version>
</dependency>

2. Run

$ mvn install

3. Use it

[...]

import wniemiec.task.java.Checkpoint;

[...]

public class CheckpointExample {

[...]

Checkpoint checkpoint = new Checkpoint(tmpDir, "checkpoint-example");

System.out.println("Trying to access piece of code...");

if (checkpoint.isEnabled()) {
	System.out.println("Piece of code already executed");
}
else {
	System.out.println("Piece of code executed for the first time");
	checkpoint.enable();
}

System.out.println("...");

while (true) {
}

[...]

Process one

$ java CheckpointExample
Trying to access piece of code...
Piece of code executed for the first time
...

Process two

$ java CheckpointExample
Trying to access piece of code...
Piece of code already executed
...

📖 Documentation

Property	Parameter type	Return type	Description	Default parameter value
enable	void	void	Starts a new checkpoint	-
disable	void	void	Disables checkpoint	-
exists	void	boolean	Checks if a checkpoint was created.	-
isEnabled	void	boolean	Checks if the checkpoint is active.	-
delete	void	void	Checks if the checkpoint is active.	-

🚩 Changelog

Details about each version are documented in the releases section.

🤝 Contribute!

See the documentation on how you can contribute to the project here.

📁 Files

/

Name	Type	Description
dist	Directory	Released versions
docs	Directory	Documentation files
src	Directory	Source files