Class DeleteOperation
java.lang.Object
org.apache.derby.impl.store.raw.data.PageBasicOperation
org.apache.derby.impl.store.raw.data.LogicalPageOperation
org.apache.derby.impl.store.raw.data.DeleteOperation
- All Implemented Interfaces:
Externalizable
,Serializable
,Formatable
,TypedFormat
,Loggable
,LogicalUndoable
,RePreparable
,Undoable
Represents a delete (or undelete) of a record in a page.
- See Also:
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Field Summary
FieldsFields inherited from class org.apache.derby.impl.store.raw.data.LogicalPageOperation
recordId, undo
Fields inherited from class org.apache.derby.impl.store.raw.data.PageBasicOperation
containerHdl, foundHere, page
Fields inherited from interface org.apache.derby.iapi.store.raw.Loggable
ABORT, BI_LOG, CHECKSUM, COMMIT, COMPENSATION, FILE_RESOURCE, FIRST, LAST, PREPARE, RAWSTORE, XA_NEEDLOCK
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Constructor Summary
ConstructorsConstructorDescriptionDeleteOperation
(RawTransaction t, BasePage page, int slot, int recordId, boolean delete, LogicalUndo undo) -
Method Summary
Modifier and TypeMethodDescriptionvoid
doMe
(Transaction xact, LogInstant instant, LimitObjectInput in) Mark the record as deleted on the page.the default for optional data is set to null.int
Return my format identifier.void
Read this invoid
restoreLoggedRow
(Object[] row, LimitObjectInput in) Restore the row stored in the optional data of the log record.void
restoreMe
(Transaction xact, BasePage undoPage, LogInstant CLRinstant, LimitObjectInput in) restore the before image of the pagetoString()
void
undoMe
(Transaction xact, BasePage undoPage, int undoRecordId, LogInstant CLRInstant, LimitObjectInput in) Mark the record as not deleted, and then fix up the in-memory copy of the page.void
Write this out.private void
if logical undo, writes out the row that was deletedMethods inherited from class org.apache.derby.impl.store.raw.data.LogicalPageOperation
generateUndo, getContainer, getRecordHandle, reclaimPrepareLocks, resetRecordHandle
Methods inherited from class org.apache.derby.impl.store.raw.data.PageBasicOperation
findpage, getPage, getPageForRedoRecovery, getPageId, getPageVersion, group, needsRedo, releaseResource, resetPageNumber
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
Methods inherited from interface org.apache.derby.iapi.store.raw.Loggable
group, needsRedo, releaseResource
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Field Details
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doMeSlot
protected int doMeSlot -
delete
protected boolean delete -
preparedLog
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Constructor Details
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DeleteOperation
DeleteOperation(RawTransaction t, BasePage page, int slot, int recordId, boolean delete, LogicalUndo undo) throws StandardException - Throws:
StandardException
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DeleteOperation
public DeleteOperation()
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Method Details
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writeExternal
Write this out.- Specified by:
writeExternal
in interfaceExternalizable
- Overrides:
writeExternal
in classLogicalPageOperation
- Throws:
IOException
- error writing to log stream
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readExternal
Read this in- Specified by:
readExternal
in interfaceExternalizable
- Overrides:
readExternal
in classLogicalPageOperation
- Throws:
IOException
- error reading from log streamClassNotFoundException
- log stream corrupted
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getTypeFormatId
public int getTypeFormatId()Return my format identifier.- Returns:
- The identifier. (A UUID stuffed in an array of 16 bytes).
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doMe
public void doMe(Transaction xact, LogInstant instant, LimitObjectInput in) throws StandardException, IOException Mark the record as deleted on the page.- Parameters:
xact
- the Transactioninstant
- the log instant of this operationin
- optional data- Throws:
IOException
- Can be thrown by any of the methods of ObjectInput.StandardException
- Standard Derby policy.- See Also:
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undoMe
public void undoMe(Transaction xact, BasePage undoPage, int undoRecordId, LogInstant CLRInstant, LimitObjectInput in) throws StandardException, IOException Mark the record as not deleted, and then fix up the in-memory copy of the page. All logical undo logic has already been taken care of by generateUndo.- Specified by:
undoMe
in classLogicalPageOperation
- Parameters:
xact
- the Transaction doing the rollbackundoPage
- the page to rollback changes onundoRecordId
- the recordId to rollback changes onCLRInstant
- the log instant of this (PageUndo) operationin
- optional data for the rollback operation- Throws:
StandardException
- Thrown by methods I callIOException
- Thrown by methods I call- See Also:
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restoreLoggedRow
public void restoreLoggedRow(Object[] row, LimitObjectInput in) throws StandardException, IOException Restore the row stored in the optional data of the log record.- Parameters:
row
- an IN/OUT parameter, caller passed in the row with the correct column number and type, the log operation will restore the row with the optional data stored in the log record.- Throws:
IOException
- error reading from log streamStandardException
- Standard Derby error policy- See Also:
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restoreMe
public void restoreMe(Transaction xact, BasePage undoPage, LogInstant CLRinstant, LimitObjectInput in) throws StandardException, IOException restore the before image of the page- Specified by:
restoreMe
in classPageBasicOperation
- Parameters:
xact
- the Transaction doing the rollbackundoPage
- the page to rollback changes onCLRinstant
- the log instant of this (PageUndo) operationin
- optional data for the rollback operation- Throws:
StandardException
- Standard Derby Error PolicyIOException
- problem reading the complete log record from the input stream
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getPreparedLog
Description copied from class:PageBasicOperation
the default for optional data is set to null. If an operation has optional data, the operation need to prepare the optional data for this method. WARNING: If a log operation extends this class, and the operation has optional data, it MUST overwrite this method to return a ByteArray that contains the optional data.- Specified by:
getPreparedLog
in interfaceLoggable
- Overrides:
getPreparedLog
in classPageBasicOperation
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writeOptionalDataToBuffer
if logical undo, writes out the row that was deleted- Throws:
IOException
- Can be thrown by any of the methods of ObjectOutputStandardException
- Standard Derby policy.
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toString
- Overrides:
toString
in classPageBasicOperation
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