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我试图实现自定义注释,因为它写在这个post,但出了点问题。当我试图在dataBase中坚持我的实体时,它会用我的自定义注释来无限检查字段。我使用wildfly 9.0.2无限检查自定义JSR303注释
代码:
实体:
@Entity
@Table(name = "users")
@NamedQueries({
@NamedQuery(name = User.FIND_BY_LOGIN_AND_USERNAME,query = "SELECT u FROM User u WHERE u.userName = :username and u.password = :password"),
@NamedQuery(name = User.FIND_USER_BY_USERNAME,query = "SELECT u FROM User u WHERE u.userName = :username")
})
public class User implements Serializable{
public static final String FIND_BY_LOGIN_AND_USERNAME = "findByLoginAndPassword";
public static final String FIND_USER_BY_USERNAME = "findUserByUsername";
@Id
@GeneratedValue
private Long id;
@NotNull
@Size(min = 3,max = 64,message = "{model.User.login.message}")
@Username
@Column(name = "user_name",nullable = false,unique = true)
private String userName;
//...other fields...
//...constructors, getters and setters...
}
译注:
@Constraint(validatedBy = UsernameValidator.class)
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.FIELD,ElementType.METHOD,ElementType.ANNOTATION_TYPE})
public @interface Username {
String message() default "Username already exists";
Class<?>[] groups() default {};
Class<? extends Payload>[] payload() default {};
}
验证:
public class UsernameValidator implements ConstraintValidator<Username, String> {
@Inject
UserManager userManager;
@Override
public void initialize(Username constraintAnnotation) {
}
@Override
public boolean isValid(String username, ConstraintValidatorContext context) {
boolean isValid = !userManager.userExist(username);
return isValid;
}
}
的UserManager:
@Stateless
public class UserManager {
@PersistenceContext(unitName = "MySqlPU")
EntityManager em;
public void persist(User user){
em.persist(user);
}
public User findUserByLoginAndPassword(String username, String password) {
try {
return em.createNamedQuery(User.FIND_BY_LOGIN_AND_USERNAME, User.class)
.setParameter("username",username)
.setParameter("password",password)
.getSingleResult();
} catch (NoResultException e){
return null;
}
}
public boolean userExist(String username) {
try {
em.createNamedQuery(User.FIND_USER_BY_USERNAME, User.class)
.setParameter("username", username)
.getSingleResult();
} catch (NoResultException e) {
return false;
}
return true;
}
}
链接server.log(snip2code)
预先感谢您!
你说你正在进入一个无限循环。这是否意味着你必须杀死这个过程?或者,此错误是否出现在持久存储的日志中,并且服务器继续运行? – Hardy
服务器停止响应,我所能做的就是终止服务器进程。 –
@MaxMax JPA规范指出,不要在entitylistener中调用另一个db调用,否则会导致无限循环。我想这也适用于约束验证,因为它们也在jpa事务中执行,另一个db调用将导致再次调用相同的约束验证程序。 – maress