def withTransaction(callback: (EntityManager) => Any) = {
    val entityManager = entityFactory.createEntityManager()
    try {
      entityManager.getTransaction.begin()
      callback(entityManager)
      entityManager.getTransaction.commit()
    } finally {
      entityManager.close()
    }
  }

<property name="hibernate.connection.provider_class" value="com.zaxxer.hikari.hibernate.HikariConnectionProvider" />
<property name="hibernate.hikari.minimumIdle" value="30" />
<property name="hibernate.hikari.maximumPoolSize" value="5" />
<property name="hibernate.hikari.idleTimeout" value="30000" />
<property name="hibernate.hikari.connectionTimeout" value="300000000" />
<property name="hibernate.hikari.dataSourceClassName" value="com.mysql.jdbc.jdbc2.optional.MysqlDataSource" />
<property name="hibernate.hikari.dataSource.url" value="jdbc:mysql://--" />
<property name="hibernate.hikari.dataSource.user" value="--" />
<property name="hibernate.hikari.dataSource.password" value="--" />