如果 function 已正确运行，则返回 true

Question

so I have a functions called Single<List<Settings>> runUpgrade(Context context) in a class called UpgradeHelper where Single is imported from import io.reactivex.Single . I need to check in my ContentProvider if the runUpgrade(Context context) method was successful in executing the upgrade and return true if it was otherwise return false .

I have created another boolean function called boolean checkUpgradeSuccess() but I am confused as to how I can check for the success of the upgrade?

My code for the checkUpgradeSuccess() is as follows so far, but I don't know how to move forward:

private boolean checkMigrationSuccess(){
       UpgradeHelper uHelper = new UpgradeHelper();
       
       uHelper.runUpgrade(getContext());

        return true;
    }

Any help or advice will be highly appreciated.

Answer 1

runUpgrade method should return result info such as success, error etc about upgrade status. Also i highly recommend to separate the methods as migrate and checkStatus because you may need to check the status many times after migration.

 private isSuccess:Boolean = false;

 private boolean migrate(){
           UpgradeHelper uHelper = new UpgradeHelper();
           isSuccess = uHelper.runUpgrade(getContext());
        }

 private boolean checkStatus(){
   return isSuccess;
} 

Answer 2

How about working with exceptions? Create your own xxxExcption and put your code in

try {
    ...
} catch (Exception e) {
    ...
}