org.springframework.jdbc.datasource

## Class JdbcTransactionObjectSupport

- java.lang.Object
- - org.springframework.jdbc.datasource.JdbcTransactionObjectSupport

- All Implemented Interfaces:
    SavepointManager, SmartTransactionObject

      public abstract class JdbcTransactionObjectSupport
      extends Object
      implements SavepointManager, SmartTransactionObject

  Convenient base class for JDBC-aware transaction objects. Can contain a `ConnectionHolder`, and implements the `SavepointManager` interface based on that ConnectionHolder.

  Allows for programmatic management of JDBC 3.0 `Savepoints`. Spring's `DefaultTransactionStatus` will automatically delegate to this, as it autodetects transaction objects that implement the SavepointManager interface.

  Note that savepoints are only supported for drivers which support JDBC 3.0 or higher.

  Since:
    1.1
  Author:
    Juergen Hoeller

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `JdbcTransactionObjectSupport()`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `Object` | `createSavepoint()` This implementation creates a JDBC 3.0 Savepoint and returns it.
    `void` | `flush()` Flush the underlying sessions to the datastore, if applicable: for example, all affected Hibernate/JPA sessions.
    `ConnectionHolder` | `getConnectionHolder()`
    `protected ConnectionHolder` | `getConnectionHolderForSavepoint()`
    `Integer` | `getPreviousIsolationLevel()`
    `boolean` | `hasConnectionHolder()`
    `boolean` | `isSavepointAllowed()`
    `void` | `releaseSavepoint(Object savepoint)` This implementation releases the given JDBC 3.0 Savepoint.
    `void` | `rollbackToSavepoint(Object savepoint)` This implementation rolls back to the given JDBC 3.0 Savepoint.
    `void` | `setConnectionHolder(ConnectionHolder connectionHolder)`
    `void` | `setPreviousIsolationLevel(Integer previousIsolationLevel)`
    `void` | `setSavepointAllowed(boolean savepointAllowed)`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

    - ### Methods inherited from interface org.springframework.transaction.support.SmartTransactionObject

      `isRollbackOnly`

- - ### Constructor Detail

    - #### JdbcTransactionObjectSupport

          public JdbcTransactionObjectSupport()

  - ### Method Detail

    - #### setConnectionHolder

          public void setConnectionHolder(ConnectionHolder connectionHolder)

    - #### getConnectionHolder

          public ConnectionHolder getConnectionHolder()

    - #### hasConnectionHolder

          public boolean hasConnectionHolder()

    - #### setPreviousIsolationLevel

          public void setPreviousIsolationLevel(Integer previousIsolationLevel)

    - #### getPreviousIsolationLevel

          public Integer getPreviousIsolationLevel()

    - #### setSavepointAllowed

          public void setSavepointAllowed(boolean savepointAllowed)

    - #### isSavepointAllowed

          public boolean isSavepointAllowed()

    - #### flush

          public void flush()

      Description copied from interface: `SmartTransactionObject`
      Flush the underlying sessions to the datastore, if applicable: for example, all affected Hibernate/JPA sessions.
      Specified by:
        `flush` in interface `SmartTransactionObject`

    - #### createSavepoint

          public Object createSavepoint()
                                 throws TransactionException

      This implementation creates a JDBC 3.0 Savepoint and returns it.
      Specified by:
        `createSavepoint` in interface `SavepointManager`
      Returns:
        a savepoint object, to be passed into rollbackToSavepoint or releaseSavepoint
      Throws:
        `NestedTransactionNotSupportedException` - if the underlying transaction does not support savepoints
        `TransactionException` - if the savepoint could not be created, for example because the transaction is not in an appropriate state
      See Also:
        `Connection.setSavepoint()`

    - #### rollbackToSavepoint

          public void rollbackToSavepoint(Object savepoint)
                                   throws TransactionException

      This implementation rolls back to the given JDBC 3.0 Savepoint.
      Specified by:
        `rollbackToSavepoint` in interface `SavepointManager`
      Parameters:
        `savepoint` - the savepoint to roll back to
      Throws:
        `NestedTransactionNotSupportedException` - if the underlying transaction does not support savepoints
        `TransactionException` - if the rollback failed
      See Also:
        `Connection.rollback(java.sql.Savepoint)`

    - #### releaseSavepoint

          public void releaseSavepoint(Object savepoint)
                                throws TransactionException

      This implementation releases the given JDBC 3.0 Savepoint.
      Specified by:
        `releaseSavepoint` in interface `SavepointManager`
      Parameters:
        `savepoint` - the savepoint to release
      Throws:
        `NestedTransactionNotSupportedException` - if the underlying transaction does not support savepoints
        `TransactionException` - if the release failed
      See Also:
        `Connection.releaseSavepoint(java.sql.Savepoint)`

    - #### getConnectionHolderForSavepoint

          protected ConnectionHolder getConnectionHolderForSavepoint()
                                                              throws TransactionException

      Throws:
        `TransactionException`