SyncAsync.java

SyncAsync.java

//Given below definitions implement MySyncApiImpl.operation and MySyncApiImpl.cancelOperation methods. 
//Send me a link to github repo or a gist with your implementation.

public interface Callback {
  void onSuccess(int result);
}

public interface ErrorCallback {
  void onError(MyApiException error);
}

public interface Cancellable { 
  void cancel(); 
}

public class MyApiException extends Exception {}

public interface MyAsyncApi {
  Cancellable operation(int param, Callback onSuccess, ErrorCallback onError);
}

public class MySyncApiImpl {
  public MySyncApiImpl(MyAsyncApi api) {
      this.api = api;
  }
  
  /**
  * Runs MyAsyncApi.operation and blocks until it finishes. Throws IllegalStateException if called while operation is running.
  */
  public int operation(int param) throws MyApiException {
     //Please implement this method using this.api
  }
  
  /**
  * Cancel most recent operation started with 'operation' method.
  * Return true of operation was cancelled and false otherwise.
  */
  public boolean cancelOperation() {
    //Cancel the running operation.
  }
}