Package com.isomorphic.jpa

Class EMF

java.lang.Object
com.isomorphic.jpa.EMF
public class EMF extends Object
Singleton factory for EntityManager and transaction with helper methods.

Configuration is read from server.properties file. Value of property jpa.emfProvider specifies actual implementation. Methods hiding EntityManager and transaction object initialization are used by JPADataSource:

  • getEntityManager
  • returnEntityManager
  • getTransaction
  • commitTransaction
  • rollbackTransaction

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final String
    EMF_PROVIDER
    Name of sub property for JPA EMF provider implementation.
    static final String
    JPA_EMF_PROVIDER
    Name of property for JPA EMF provider implementation.
    static final String
    JPA_PREFIX
    Name of prefix for JPA EMF provider block.
    static final String
    TRANSACTION_ATTR
    Attribute name for RPCManager.

  • Method Summary

    Modifier and Type
    Method
    Description
    static void
    commitTransaction(Object tx)
    Commits specified transaction.
    static void
    commitTransaction(String configName, Object tx)
    Commits specified transaction.
    static jakarta.persistence.EntityManagerFactory
    get()
    Returns EntityManagerFactory.
    static jakarta.persistence.EntityManagerFactory
    get(String configName)
    Returns EntityManagerFactory.
    static jakarta.persistence.EntityManager
    getEntityManager()
    Returns EntityManager for persistence operations.
    static jakarta.persistence.EntityManager
    getEntityManager(String configName)
    Returns EntityManager for persistence operations.
    static Object
    getTransaction(jakarta.persistence.EntityManager em)
    Returns started transaction.
    static Object
    getTransaction(String configName, jakarta.persistence.EntityManager em)
    Returns started transaction.
    static void
    returnEntityManager(jakarta.persistence.EntityManager em)
    Closes EntityManager.
    static void
    returnEntityManager(String configName, jakarta.persistence.EntityManager em)
    Closes EntityManager.
    static void
    rollbackTransaction(Object tx)
    Rolls back specified transaction.
    static void
    rollbackTransaction(String configName, Object tx)
    Rolls back specified transaction.

  • Field Details

    • JPA_PREFIX

      public static final String JPA_PREFIX
      Name of prefix for JPA EMF provider block.
      See Also:

    • EMF_PROVIDER

      public static final String EMF_PROVIDER
      Name of sub property for JPA EMF provider implementation.
      See Also:

    • JPA_EMF_PROVIDER

      public static final String JPA_EMF_PROVIDER
      Name of property for JPA EMF provider implementation.
      See Also:

    • TRANSACTION_ATTR

      public static final String TRANSACTION_ATTR
      Attribute name for RPCManager. Under this attribute current transaction is stored.
      See Also:

  • Method Details

    • get

      public static jakarta.persistence.EntityManagerFactory get()
      Returns EntityManagerFactory. Using default configuration.
      Returns:
      EntityManagerFactory or null.

    • get

      public static jakarta.persistence.EntityManagerFactory get(String configName)
      Returns EntityManagerFactory.
      Parameters:
      configName - String configuration name. Default provider is used if null or empty string is passed.
      Returns:
      EntityManagerFactory or null.

    • getEntityManager

      public static jakarta.persistence.EntityManager getEntityManager() throws jakarta.persistence.PersistenceException
      Returns EntityManager for persistence operations. Using default configuration.
      Returns:
      EntityManager for persistence operations.
      Throws:
      jakarta.persistence.PersistenceException - if unable to acquire EntityManager.

    • getEntityManager

      public static jakarta.persistence.EntityManager getEntityManager(String configName) throws jakarta.persistence.PersistenceException
      Returns EntityManager for persistence operations.
      Parameters:
      configName - String configuration name. Default provider is used if null or empty string is passed.
      Returns:
      EntityManager for persistence operations.
      Throws:
      jakarta.persistence.PersistenceException - if unable to acquire EntityManager.

    • returnEntityManager

      public static void returnEntityManager(jakarta.persistence.EntityManager em)
      Closes EntityManager. Using default configuration.
      Parameters:
      em - EntityManager which should be closed.

    • returnEntityManager

      public static void returnEntityManager(String configName, jakarta.persistence.EntityManager em)
      Closes EntityManager.
      Parameters:
      configName - String configuration name. Default provider is used if null or empty string is passed.
      em - EntityManager which should be closed.

    • getTransaction

      public static Object getTransaction(jakarta.persistence.EntityManager em) throws Exception
      Returns started transaction. Using default configuration.
      Parameters:
      em - EntityManager needed if joining to existing transaction or starting transaction locally.
      Returns:
      Object Already started transaction for persistence operations.
      Throws:
      Exception - if unable to acquire or open transaction.

    • getTransaction

      public static Object getTransaction(String configName, jakarta.persistence.EntityManager em) throws Exception
      Returns started transaction.
      Parameters:
      configName - String configuration name. Default provider is used if null or empty string is passed.
      em - EntityManager needed if joining to existing transaction or starting transaction locally.
      Returns:
      Object Already started transaction for persistence operations.
      Throws:
      Exception - if unable to acquire or open transaction.

    • commitTransaction

      public static void commitTransaction(Object tx) throws Exception
      Commits specified transaction. Using default configuration.
      Parameters:
      tx - Object transaction to be commited.
      Throws:
      Exception - occured while committing transaction.

    • commitTransaction

      public static void commitTransaction(String configName, Object tx) throws Exception
      Commits specified transaction.
      Parameters:
      configName - String configuration name. Default provider is used if null or empty string is passed.
      tx - Object transaction to be commited.
      Throws:
      Exception - occured while committing transaction.

    • rollbackTransaction

      public static void rollbackTransaction(Object tx)
      Rolls back specified transaction. Using default configuration.
      Parameters:
      tx - Object transaction to be rolled back.

    • rollbackTransaction

      public static void rollbackTransaction(String configName, Object tx)
      Rolls back specified transaction.
      Parameters:
      configName - String configuration name. Default provider is used if null or empty string is passed.
      tx - Object transaction to be rolled back.