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## 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
`JdbcTransactionObjectSupport()`

Method Summary
`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`

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