java.lang.Object
- org.apache.derby.impl.store.raw.data.ContainerBasicOperation
- - org.apache.derby.impl.store.raw.data.ContainerUndoOperation

All Implemented Interfaces:

java.io.Externalizable, java.io.Serializable, Formatable, TypedFormat, Compensation, Loggable
```
public class ContainerUndoOperation
extends ContainerBasicOperation
implements Compensation
```
A Container undo operation rolls back the change of a Container operation

See Also:

Serialized Form

Field Summary

Fields
Modifier and Type Field Description

private ContainerOperation undoOp
- Fields inherited from class org.apache.derby.impl.store.raw.data.ContainerBasicOperation
  containerHdl, containerId
- 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

Constructor Summary

Constructors
Constructor	Description
`ContainerUndoOperation()`
`ContainerUndoOperation(RawContainerHandle hdl, ContainerOperation op)`	Set up a Container undo operation during run time rollback

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`doMe(Transaction xact, LogInstant instant, LimitObjectInput in)`	Apply the undo operation, in this implementation of the RawStore, it can only call the undoMe method of undoOp
`int`	`getTypeFormatId()`	Return my format identifier.
`int`	`group()`	A space operation is a RAWSTORE log record
`void`	`readExternal(java.io.ObjectInput in)`
`void`	`releaseResource(Transaction xact)`	Release any resource that was acquired for doMe for rollback or recovery redo.
`void`	`setUndoOp(Undoable op)`	Set up a Container undo operation during recovery redo.
`void`	`writeExternal(java.io.ObjectOutput out)`

Methods inherited from class org.apache.derby.impl.store.raw.data.ContainerBasicOperation
findContainer, findContainerForRedoRecovery, getPreparedLog, needsRedo, toString

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
getPreparedLog, needsRedo

- Field Detail
  - undoOp
```
private transient ContainerOperation undoOp
```
- Constructor Detail
  - ContainerUndoOperation
```
public ContainerUndoOperation(RawContainerHandle hdl,
                              ContainerOperation op)
                       throws StandardException
```
    Set up a Container undo operation during run time rollback
    
    Throws:
    
    StandardException - container Handle is not active
  - ContainerUndoOperation
```
public ContainerUndoOperation()
```
- Method Detail
  - writeExternal
```
public void writeExternal(java.io.ObjectOutput out)
                   throws java.io.IOException
```
    Specified by:
    
    writeExternal in interface java.io.Externalizable
    
    Overrides:
    
    writeExternal in class ContainerBasicOperation
    
    Throws:
    
    java.io.IOException
  - readExternal
```
public void readExternal(java.io.ObjectInput in)
                  throws java.io.IOException,
                         java.lang.ClassNotFoundException
```
    Specified by:
    
    readExternal in interface java.io.Externalizable
    
    Overrides:
    
    readExternal in class ContainerBasicOperation
    
    Throws:
    
    java.io.IOException - cannot read log record from log stream
    
    java.lang.ClassNotFoundException - cannot read ByteArray object
  - getTypeFormatId
```
public int getTypeFormatId()
```
    Return my format identifier.
    
    Specified by:
    
    getTypeFormatId in interface TypedFormat
    
    Returns:
    
    The identifier. (A UUID stuffed in an array of 16 bytes).
  - setUndoOp
```
public void setUndoOp(Undoable op)
```
    Set up a Container undo operation during recovery redo.
    
    Specified by:
    
    setUndoOp in interface Compensation
    
    Parameters:
    
    op - the Undoable operation
    
    See Also:
    
    Loggable.needsRedo(org.apache.derby.iapi.store.raw.Transaction)
  - doMe
```
public final void doMe(Transaction xact,
                       LogInstant instant,
                       LimitObjectInput in)
                throws StandardException,
                       java.io.IOException
```
    Apply the undo operation, in this implementation of the RawStore, it can only call the undoMe method of undoOp
    
    Specified by:
    
    doMe in interface Loggable
    
    Parameters:
    
    xact - the Transaction that is doing the rollback
    
    instant - the log instant of this compenstaion operation
    
    in - optional data
    
    Throws:
    
    java.io.IOException - Can be thrown by any of the methods of ObjectInput.
    
    StandardException - Standard Derby error policy.
    
    See Also:
    
    ContainerOperation.generateUndo(org.apache.derby.iapi.store.raw.Transaction, org.apache.derby.iapi.services.io.LimitObjectInput)
  - releaseResource
```
public void releaseResource(Transaction xact)
```
    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 interface Loggable
    
    Overrides:
    
    releaseResource in class ContainerBasicOperation
  - group
```
public int group()
```
    Description copied from class: ContainerBasicOperation
    
    A space operation is a RAWSTORE log record
    
    Specified by:
    
    group in interface Loggable
    
    Overrides:
    
    group in class ContainerBasicOperation

Class ContainerUndoOperation

Field Summary

Fields inherited from class org.apache.derby.impl.store.raw.data.ContainerBasicOperation

Fields inherited from interface org.apache.derby.iapi.store.raw.Loggable

Constructor Summary

Method Summary

Methods inherited from class org.apache.derby.impl.store.raw.data.ContainerBasicOperation

Methods inherited from class java.lang.Object

Methods inherited from interface org.apache.derby.iapi.store.raw.Loggable

Field Detail

undoOp

Constructor Detail

ContainerUndoOperation

ContainerUndoOperation

Method Detail

writeExternal

readExternal

getTypeFormatId

setUndoOp

doMe

releaseResource

group