com.persistit

Interface ReadOnlyExchange

All Known Implementing Classes:

Exchange

public interface ReadOnlyExchange

Methods of the Exchange class that are safe to use within a Exchange.TraverseVisitor.

Method Summary

Modifier and Type	Method and Description
long	getChangeCount() Return the count of structural changes committed to the Tree on which this Exchange operates.
Key	getKey() Return the Key associated with this Exchange.
Persistit	getPersistitInstance() Return the Persistit instance from which this Exchange was created.
Transaction	getTransaction() The transaction context for this Exchange.
Tree	getTree() Return the Tree on which this Exchange operates.
Value	getValue() Return the Value associated with this Exchange.
Volume	getVolume() Return the Volume containing the data accessed by this Exchange.

Method Detail

getKey

Key getKey()

Return the Key associated with this Exchange.

Returns:

This Key.

getValue

Value getValue()

Return the Value associated with this Exchange.

Returns:

The Value.

getVolume

Volume getVolume()

Return the Volume containing the data accessed by this Exchange.

Returns:

The Volume.

getTree

Tree getTree()

Return the Tree on which this Exchange operates.

Returns:

The Tree

getPersistitInstance

Persistit getPersistitInstance()

Return the Persistit instance from which this Exchange was created.

Returns:

The Persistit instance.

getChangeCount

long getChangeCount()

Return the count of structural changes committed to the Tree on which this Exchange operates. This count includes changes committed by all Threads, including the current one. A structural change is one in which at least one key is inserted or deleted. Replacement of an existing value is not counted.

Returns:

The change count

getTransaction

Transaction getTransaction()

The transaction context for this Exchange. By default, this is the transaction context of the current thread, and by default, all Exchanges created by a thread share the same transaction context.

Returns:

The Transaction context for this thread.