Interface TransactionId
- All Superinterfaces:
Externalizable
,Formatable
,Serializable
,TypedFormat
- All Known Implementing Classes:
XactId
A transaction identifier that is only unique within a raw store, do not
ever pass this out of raw store. During reboot, all transaction Ids that
have ever generated a log record will not be reused.
However, if you put away the transaction Id of a read only transaction,
then the is no guarentee that the transactionId won't be reused when the
system reboots. It is much safer to store away the ExternalTrasanctionId
rather than the transactionId.
The equals() method for TransactionId implements by value equality.
MT - immutable
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Method Summary
Modifier and TypeMethodDescriptionint
Return the maximum number of bytes the transactionId will take to store using writeExternal.Methods inherited from interface java.io.Externalizable
readExternal, writeExternal
Methods inherited from interface org.apache.derby.iapi.services.io.TypedFormat
getTypeFormatId
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Method Details
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getMaxStoredSize
int getMaxStoredSize()Return the maximum number of bytes the transactionId will take to store using writeExternal.
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