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jfibers's Introduction

jfibers

Simple coroutines/fibers implementations through bytecode instrumentation.

Getting Started

TODO

How It Works

jfibers-maven-plugin looks for and instruments all classes with methods which have Fiber<T> as a return type and methods body with either an instruction
INVOKEVIRTUAL com.github.rostmyr.jfibers.Fiber result (Fiber<T>/T/Future<T>)Fiber<T>
or INVOKEVIRTUAL com.github.rostmyr.jfibers.Fiber nothing ()Fiber<Void>.

Here are a few examples

Before Instrumentation

public class MyClass {
  private UserService userService;
  
  public void Fiber<String> updateUserPhone(long userId, String phone) {
    User user = call(userService.getUser(userId));
    user.setPhone(phone);
    user = call(userService.saveUser(user));
    return result(user);
  }
}

After Instrumentation

public class MyClass {
  private UserService userService;
  
  public void Fiber<String> updateUserPhone(long userId, String phone) {
    return new updateUserPhone_Fiber(userId, phone);
  }
  
  protected int updateUserPhone_FiberUpdate(updateUserPhone_Fiber fiber) {
    switch(fiber.getState()) {
      TODO
    }
  }
  
  public class updateUserPhone_Fiber extends Fiber<String> {
    public long userId;
    public String phone;

    public callMethodChain_Fiber(long userId, String phone) {
      this.userId = userId;
      this.phone = phone;
    }

    public int update() {
      return TestFiberModel.this.callMethodChain_FiberUpdate(this);
    }
  }
}

Inspired By

http://ssw.jku.at/General/Staff/LS/coro/
https://github.com/vsilaev/tascalate-javaflow
https://www.youtube.com/watch?v=_Z8R9NmH0i4

jfibers's People

Contributors

rostmyr avatar taluks avatar

Watchers

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