[jboss-user] [Beginners Corner] - our Own Contraints @UserName
I wrote my own constraints @username If Username is registered and it is already present
in the database , I should dispaly Username Already Exists , I wrote the code , but I am
getting the below exception .
1.Exception during request processing:
Caused by java.lang.IllegalStateException with message: "Could not commit
transaction"
2.Caused by javax.transaction.RollbackException with message:
"[com.arjuna.ats.internal.jta.transaction.arjunacore.commitwhenaborted]
[com.arjuna.ats.internal.jta.transaction.arjunacore.commitwhenaborted] Can't commit
because the transaction is in aborted state"
------------------
Code:UserName.java
--------------------
package com.manam.mortgage.entity;
import java.lang.annotation.Documented;
import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.METHOD;
import java.lang.annotation.Retention;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
import java.lang.annotation.Target;
import org.hibernate.validator.Validator;
import org.hibernate.validator.ValidatorClass;
@Documented
@ValidatorClass(UserNameValidator.class)
@Target({METHOD, FIELD})
@Retention(RUNTIME)
public @interface UserName {
String tablename();
String columnname();
String message() default "validator.user";
}
----------------------
UserNaemValidator.java
---------------------
package com.manam.mortgage.entity;
import java.io.Serializable;
import java.util.List;
import org.hibernate.validator.Validator;
import javax.persistence.EntityManager;
import javax.persistence.NoResultException;
import javax.persistence.Query;
import org.hibernate.validator.PropertyConstraint;
import org.jboss.seam.Component;
import org.jboss.seam.annotations.In;
public class UserNameValidator implements Validator, Serializable {
private String tablename;
private String columnname;
@In EntityManager entityManager;
private UserName parameters;
public void initialize(UserName parameters) {
this.parameters = parameters;
this.tablename=parameters.tablename();
this.columnname = parameters.columnname();
}
public boolean isValid(Object v){
if(v==null)
return true;
String fieldvalue=(String)v;
System.out.println("****************************");
System.out.println("column name:"+columnname);
System.out.println("field vale:"+fieldvalue);
System.out.println("table name:"+tablename);
Query
q=((EntityManager)Component.getInstance("entityManager")).createQuery("from
" +tablename+ " where " +columnname+ " =:fieldvalue ");
q.setParameter("fieldvalue",fieldvalue);
try{
q.getSingleResult();
return true;
}catch(final NoResultException e){
System.out.println("Not Exists Boss ........");
return false;
}
}
}
Please help me any body, Thanking you.
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