spring framework show sql parameters

See the binding parameters in JPA query – java logs

see binding parameters in jpa query

What would the world look like if log was not created for us – I ask, and you say nothing! You right, there is also another world :)

Getting back from the crazy thoughts, there is a config spring allows us to see the SQL statements that the JPA is doing behind the scenes..

In you application.yml file


Will show the sql statements on your logs. But it will show with ? for the values used.

To see those values also along with the query add the following on the application file.


That is it!

JSF App slow with JPA connection

If you are working on Java Persistence API JPA on tomcat or any other web server this would be happening if you have multiple threads going off for connections.

The rule of thumb shall be to have one EntityManagerFactory and get EntityManagers out of it. Hence we would have one factory but multiple products that would take care of closing and managing them selves.

What are the signs:

1. Do you instantiate Persistence.createEntityManagerFactory(“name”) from multiple places?
2. What do you see on Process when you run

ps -aux | grep tomcat

Do you see multiple instances

If either or both of the above have yes, then here is the solution.

The first thing have single instance of ManagerFactory

package com.enderase.persistence;

import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;

* Singlton implementation for EntityManagerFactory
* @author Kaleb Woldearegay<kaleb@gullele.com>
public class HibernateUtil {
private static final EntityManagerFactory entityManagerFactory;

static {
try {
entityManagerFactory = Persistence.createEntityManagerFactory("jpa");
} catch (Throwable exception) {
//log your error here
throw new ExceptionInInitializerError(exception);

public static EntityManagerFactory getEntityManager() {
return entityManagerFactory;

Then make sure you are taking care of the instances of the EntityManagers that are created from the factory using

EntityManagerFactory entityManagerFactory = HibernateUtil.getEntityManager();
EntityManager em = entityManagerFactory.createEntityManager();

Make sure to close them appropriately after using them

This should pretty much take care of the problem