Class ContainerBasicOperation
- All Implemented Interfaces:
Externalizable
,Serializable
,Formatable
,TypedFormat
,Loggable
- Direct Known Subclasses:
ContainerOperation
,ContainerUndoOperation
- See Also:
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Field Summary
FieldsModifier and TypeFieldDescriptionprotected RawContainerHandle
protected ContainerKey
private long
private boolean
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
ConstructorsModifierConstructorDescriptionprotected
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Method Summary
Modifier and TypeMethodDescriptionprotected RawContainerHandle
findContainer
(Transaction tran) Open the container with this segmentId and containerId.protected RawContainerHandle
Subclass (e.g., ContainerOperation) that wishes to do something abou missing container in load tran should override this method to return the recreated containerthe default for prepared log is always null for all the operations that don't have optionalData.int
group()
A space operation is a RAWSTORE log recordboolean
needsRedo
(Transaction xact) Determine if the operation should be reapplied in recovery redo.void
void
releaseResource
(Transaction tran) Release any resource that was acquired for doMe for rollback or recovery redo.toString()
void
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.services.io.TypedFormat
getTypeFormatId
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Field Details
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containerVersion
private long containerVersion -
containerId
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containerHdl
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foundHere
private transient boolean foundHere
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Constructor Details
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ContainerBasicOperation
- Throws:
StandardException
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ContainerBasicOperation
public ContainerBasicOperation()
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Method Details
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writeExternal
- Specified by:
writeExternal
in interfaceExternalizable
- Throws:
IOException
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readExternal
- Specified by:
readExternal
in interfaceExternalizable
- Throws:
IOException
ClassNotFoundException
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getPreparedLog
the default for prepared log is always null for all the operations that don't have optionalData. If an operation has optional data, the operation need to prepare the optional data for this method. Space Operation has no optional data to write out- Specified by:
getPreparedLog
in interfaceLoggable
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releaseResource
Description copied from interface:Loggable
Release any resource that was acquired for doMe for rollback or recovery redo. This resource is acquired in either generateUndo (if this is a compensation operation during run time rollback or recovery rollback) or in needsRedo (if this is during recovery redo). The run time transaction context should have all the resource already acquird for run time roll forward, so there is no need to releaseResource during run time roll forward. This method must be safe to be called multiple times.- Specified by:
releaseResource
in interfaceLoggable
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group
public int group()A space operation is a RAWSTORE log record -
findContainer
Open the container with this segmentId and containerId. This method should only be called if the container has already been created.- Throws:
StandardException
- the container cannot be found or cannot be opened.
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findContainerForRedoRecovery
protected RawContainerHandle findContainerForRedoRecovery(RawTransaction tran) throws StandardException Subclass (e.g., ContainerOperation) that wishes to do something abou missing container in load tran should override this method to return the recreated container- Throws:
StandardException
- Standard Derby error policy
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needsRedo
Description copied from interface:Loggable
Determine if the operation should be reapplied in recovery redo. If redo is needed, acquire any resource that is necessary for the loggable's doMe method. These need to be released in the releaseResource method.The sequence of events in recovery redo of a Loggable operation is:
- Get the loggable operation. If loggable.needsRedo is false, then no need to redo this operation.
- If loggable.needsRedo is true, all the resources necessary for applying the doMe is acquired in needsRedo.
- If the loggable is actually a compensation operation, then the logging system will find the undoable operation that needs to be undone, call compensation.setUndoOp with the undoable operation.
- The recovery system then calls loggable.doMe, which re-applies the loggable operation, or re-applies the compensation operation
- The recovery system then calls loggable.releaseResource.
- Specified by:
needsRedo
in interfaceLoggable
- Parameters:
xact
- The transaction trying to redo this operation- Returns:
- true if operation needs redoing, false if not.
- Throws:
StandardException
- Standard Derby error policy- See Also:
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toString
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