Spring - Refactoring - move Einheit konstant Konfiguration (application.properties)

Question

Was ist der beste Weg von Code konstant zu bewegen:

@Entity 
public abstract class Post { 

    ... 

    private static final int HOTPOST_LIKE_TRESHOLD = 6; 

    ... 

    public long increaseLikeCounter() { 
     likesCount++; 

     if (likesCount >= HOTPOST_LIKE_TRESHOLD) { 
     this.setStatus(HOT); 
     } 

     return likesCount; 
    } 

    ... 

} 

zur Konfigurationsdatei Frühling verwenden? (d. h. Spring Boot application.properties)

Die Operation ist nun in der Post-Klasse gekapselt, und es ist OK für mich, HOTPOST_LIKE_TRESHOLD von der Klasse wegzubewegen, aber ich möchte die likeCounter-Methode dort beibehalten, wo sie ist.

Answer 1

Änderung Post an:

@Entity 
public abstract class Post { 

    ... 

    protected abstract Integer getHotpostLikeTreshold();  
    ... 

    public long increaseLikeCounter() { 
     likesCount++; 

     if (likesCount >= getHotpostLikeTreshold()) { 
     this.setStatus(HOT); 
     } 

     return likesCount; 
    } 
    ... 

} 

dann die Klasse erweitern, zum Beispiel:

public class SimplePost extends Post { 

@Value("${simplePost.hotpostLikeTreshold}") 
private Integer hotpostLikeTreshold; 

@Override 
protected Integer getHotpostLikeTreshold(){ 
    return hotpostLikeTreshold; 
} 
... 

in Ihrem application.properties hinzufügen

simplePost.hotpostLikeTreshold = 6 

EDIT:

use a Service and getters setters: 

@Service 
public class SimplePostService{ 

    // wire your property in 
    @Value("${simplePost.hotpostLikeTreshold}") 
    private Integer hotpostLikeTreshold; 

    public Post savePost(...){ 
     Post post = new SimplePost(); // you create your post with 'new' 
     ... 
     // set your property 
     post.setHotpostLikeTreshold(this.hotpostLikeTreshold); 
     ... 
     // save your entity 
     SimplePostDAO.save(post); 
    } 

}