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## org.springframework.transaction.support
Class ResourceHolderSupport

    java.lang.Object
      org.springframework.transaction.support.ResourceHolderSupport

All Implemented Interfaces:
  ResourceHolder

Direct Known Subclasses:
  ConnectionHolder, ConnectionHolder, EntityManagerHolder, JmsResourceHolder, PersistenceManagerHolder, SessionHolder, SessionHolder

    public abstract class ResourceHolderSupport

extends Object
implements ResourceHolder

Convenient base class for resource holders.

Features rollback-only support for nested transactions. Can expire after a certain number of seconds or milliseconds, to determine transactional timeouts.

Since:
  02.02.2004
Author:
  Juergen Hoeller
See Also:
  `DataSourceTransactionManager.doBegin(java.lang.Object, org.springframework.transaction.TransactionDefinition)`, `DataSourceUtils.applyTransactionTimeout(java.sql.Statement, javax.sql.DataSource)`

Constructor Summary
`ResourceHolderSupport()`

Method Summary
`void` | `clear()` Clear the transactional state of this resource holder.
`Date` | `getDeadline()` Return the expiration deadline of this object.
`long` | `getTimeToLiveInMillis()` Return the time to live for this object in milliseconds.
`int` | `getTimeToLiveInSeconds()` Return the time to live for this object in seconds.
`boolean` | `hasTimeout()` Return whether this object has an associated timeout.
`boolean` | `isOpen()` Return whether there are still open references to this holder.
`boolean` | `isRollbackOnly()` Return whether the resource transaction is marked as rollback-only.
`boolean` | `isSynchronizedWithTransaction()` Return whether the resource is synchronized with a transaction.
`boolean` | `isVoid()` Determine whether this holder is considered as 'void', i.e.
`void` | `released()` Decrease the reference count by one because the holder has been released (i.e.
`void` | `requested()` Increase the reference count by one because the holder has been requested (i.e.
`void` | `reset()` Reset this resource holder - transactional state as well as reference count.
`void` | `setRollbackOnly()` Mark the resource transaction as rollback-only.
`void` | `setSynchronizedWithTransaction(boolean synchronizedWithTransaction)` Mark the resource as synchronized with a transaction.
`void` | `setTimeoutInMillis(long millis)` Set the timeout for this object in milliseconds.
`void` | `setTimeoutInSeconds(int seconds)` Set the timeout for this object in seconds.
`void` | `unbound()` Notify this holder that it has been unbound from transaction synchronization.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### ResourceHolderSupport

    public ResourceHolderSupport()

Method Detail

### setSynchronizedWithTransaction

    public void setSynchronizedWithTransaction(boolean synchronizedWithTransaction)

  Mark the resource as synchronized with a transaction.

### isSynchronizedWithTransaction

    public boolean isSynchronizedWithTransaction()

  Return whether the resource is synchronized with a transaction.

### setRollbackOnly

    public void setRollbackOnly()

  Mark the resource transaction as rollback-only.

### isRollbackOnly

    public boolean isRollbackOnly()

  Return whether the resource transaction is marked as rollback-only.

### setTimeoutInSeconds

    public void setTimeoutInSeconds(int seconds)

  Set the timeout for this object in seconds.

  Parameters:
    `seconds` - number of seconds until expiration

### setTimeoutInMillis

    public void setTimeoutInMillis(long millis)

  Set the timeout for this object in milliseconds.

  Parameters:
    `millis` - number of milliseconds until expiration

### hasTimeout

    public boolean hasTimeout()

  Return whether this object has an associated timeout.

### getDeadline

    public Date getDeadline()

  Return the expiration deadline of this object.

  Returns:
    the deadline as Date object

### getTimeToLiveInSeconds

    public int getTimeToLiveInSeconds()

  Return the time to live for this object in seconds. Rounds up eagerly, e.g. 9.00001 still to 10.

  Returns:
    number of seconds until expiration
  Throws:
    `TransactionTimedOutException` - if the deadline has already been reached

### getTimeToLiveInMillis

    public long getTimeToLiveInMillis()
                               throws TransactionTimedOutException

  Return the time to live for this object in milliseconds.

  Returns:
    number of millseconds until expiration
  Throws:
    `TransactionTimedOutException` - if the deadline has already been reached

### requested

    public void requested()

  Increase the reference count by one because the holder has been requested (i.e. someone requested the resource held by it).

### released

    public void released()

  Decrease the reference count by one because the holder has been released (i.e. someone released the resource held by it).

### isOpen

    public boolean isOpen()

  Return whether there are still open references to this holder.

### clear

    public void clear()

  Clear the transactional state of this resource holder.

### reset

    public void reset()

  Reset this resource holder - transactional state as well as reference count.

  Specified by:
    `reset` in interface `ResourceHolder`

### unbound

    public void unbound()

  Description copied from interface: `ResourceHolder`
  Notify this holder that it has been unbound from transaction synchronization.

  Specified by:
    `unbound` in interface `ResourceHolder`

### isVoid

    public boolean isVoid()

  Description copied from interface: `ResourceHolder`
  Determine whether this holder is considered as 'void', i.e. as a leftover from a previous thread.

  Specified by:
    `isVoid` in interface `ResourceHolder`

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