Delete records from more than 1 year ago

Question

I\'m saving twitter tweets in my database with spring JPA Repositories. The date of the tweet is saved as Datetime in the MySQL db. Now I want to delete all tweets that are

Answer 1

For this you need 2 steps. First of all you need a method that will take as a parameter the date of which you want to delete the messages and you dont need tha @Query annotation at all.

So in your repository you must have something like

    @Modifying
    public void deleteByCreatedAtBefore(Date expiryDate);

Now in your service method, you will calculate the Date and pass it on like this

    public void performTweetCleanup(){
       //calculate date
       Calendar cal = Calendar.getInstance();
       Date today = cal.getTime();
       cal.add(Calendar.YEAR, -1);
       Date previousYear = cal.getTime();

       //call the method
       MyTweeterRepository.deleteByCreatedAtBefore(previousYear);
     }