Package org.apache.derby.iapi.store.raw

Interface ScanHandle

All Known Implementing Classes:

FlushedScanHandle

public interface ScanHandle

Inteface for scanning the log from outside the RawStore.

Method Summary

Modifier and Type	Method	Description
void	close()	Close this scan.
int	getGroup()	Get the group for the current log record.
DatabaseInstant	getInstant()	Get the DatabaseInstant for the current log record.
Loggable	getLoggable()	Get the Loggable associated with the currentLogRecord
java.io.InputStream	getOptionalData()	Get an InputStream for reading the optional data associated with the current log record.
java.lang.Object	getTransactionId()	Get the TransactionId for the current log record.
boolean	next()	Position to the next log record.

Method Detail

next

boolean next()
      throws StandardException

Position to the next log record.

Returns:

true if the log contains a next flushed log record and false otherwise. If this returns false it is incorrect to make any of the other calls on this interface.

Throws:

StandardException - Oops

getGroup

int getGroup()
      throws StandardException

Get the group for the current log record.

Throws:

StandardException - Oops

getLoggable

Loggable getLoggable()
              throws StandardException

Get the Loggable associated with the currentLogRecord

Throws:

StandardException - Oops

getOptionalData

java.io.InputStream getOptionalData()
                             throws StandardException

Get an InputStream for reading the optional data associated with the current log record. This may only be called once per log record.

Throws:

StandardException - Oops

getInstant

DatabaseInstant getInstant()
                    throws StandardException

Get the DatabaseInstant for the current log record.

Throws:

StandardException - Oops

getTransactionId

java.lang.Object getTransactionId()
                           throws StandardException

Get the TransactionId for the current log record.

Throws:

StandardException - Oops

close

void close()

Close this scan.