Top Description Fields Constructors Methods
org.apache.derby.impl.store.raw.data

public final Class InitPageOperation

extends PhysicalPageOperation
Class Inheritance
Imports
org.apache.derby.impl.store.raw.data.BasePage, org.apache.derby.shared.common.sanity.SanityManager, org.apache.derby.iapi.services.io.FormatIdUtil, .StoredFormatIds, .CompressedNumber, .LimitObjectInput, org.apache.derby.shared.common.error.StandardException, org.apache.derby.iapi.store.raw.RecordHandle, .Page, .Transaction, org.apache.derby.iapi.store.raw.log.LogInstant, java.io.OutputStream, .ObjectOutput, .ObjectInput, .IOException
This operation initializes the page that is being allocated, this operation does not change the alloc page information. 





Field Summary




Modifier and TypeField and Description

protected int
initFlag




protected int
nextRecordId




protected boolean
overflowPage




protected int
pageFormatId




protected long
pageOffset




protected boolean
reuse










Constructor Summary




AccessConstructor and Description

pack-priv
InitPageOperation(BasePage page, int flag, int formatid, long offset)




public
InitPageOperation()










Method Summary




Modifier and TypeMethod and Description

public void
doMe(Transaction 
the Transaction
xact, LogInstant 
the log instant of this operation
instant, LimitObjectInput 
optional data
in)
Implements org.apache.derby.iapi.store.raw.Loggable.doMe.


Mark the page as valid, and clear out any crud from the page



protected BasePage
getPageForRedoRecovery(Transaction xact)
Overrides org.apache.derby.impl.store.raw.data.PageBasicOperation.getPageForRedoRecovery.


If we are in load tran, this page may not exist for the container yet.



public int
getTypeFormatId()
Implements org.apache.derby.iapi.services.io.TypedFormat.getTypeFormatId.


Return my format identifier.



public void
readExternal(ObjectInput 
the stream to read data from in order to restore the object
in)
Overrides org.apache.derby.impl.store.raw.data.PageBasicOperation.readExternal.


Implements java.io.Externalizable.readExternal.


Read this in



public void
restoreMe(Transaction 
the Transaction doing the rollback
xact, BasePage 
the page to rollback changes on
undoPage, LogInstant 
the log instant of this (PageUndo) operation
CLRInstant, LimitObjectInput 
optional data for the rollback operation
in)
Implements abstract org.apache.derby.impl.store.raw.data.PageBasicOperation.restoreMe.


restore the before image of the page



public String
toString()
Overrides org.apache.derby.impl.store.raw.data.PageBasicOperation.toString.


Returns a string representation of the object.



public void
undoMe(Transaction 
the Transaction doing the rollback
xact, BasePage 
the page to rollback changes on
undoPage, LogInstant 
the log instant of this (PageUndo) operation
CLRInstant, LimitObjectInput 
optional data for the rollback operation
in)
Implements abstract org.apache.derby.impl.store.raw.data.PhysicalPageOperation.undoMe.


Mark the page as free



public void
writeExternal(ObjectOutput 
the stream to write the object to
out)
Overrides org.apache.derby.impl.store.raw.data.PageBasicOperation.writeExternal.


Implements java.io.Externalizable.writeExternal.


Write this out.







Inherited from org.apache.derby.impl.store.raw.data.PhysicalPageOperation:


generateUndo







Field Detail




initFlagback to summary

protected int initFlag






nextRecordIdback to summary

protected int nextRecordId






overflowPageback to summary

protected boolean overflowPage






pageFormatIdback to summary

protected int pageFormatId






pageOffsetback to summary

protected long pageOffset






reuseback to summary

protected boolean reuse








Constructor Detail




InitPageOperationback to summary

pack-priv InitPageOperation(BasePage page, int flag, int formatid, long offset) throws StandardException






InitPageOperationback to summary

public InitPageOperation()








Method Detail




doMeback to summary

public void doMe(Transaction xact, LogInstant instant, LimitObjectInput in) throws StandardException, IOException
Implements org.apache.derby.iapi.store.raw.Loggable.doMe.

Mark the page as valid, and clear out any crud from the page



Parameters



xact:Transaction
Doc from org.apache.derby.iapi.store.raw.Loggable.doMe.

the Transaction

instant:LogInstant
Doc from org.apache.derby.iapi.store.raw.Loggable.doMe.

the log instant of this operation

in:LimitObjectInput
Doc from org.apache.derby.iapi.store.raw.Loggable.doMe.

optional data



Exceptions



StandardException:
Standard Derby policy.

IOException:
Can be thrown by any of the methods of ObjectInput.



See Also

org.apache.derby.iapi.store.raw.Loggable#doMe








getPageForRedoRecoveryback to summary

protected BasePage getPageForRedoRecovery(Transaction xact) throws StandardException
Overrides org.apache.derby.impl.store.raw.data.PageBasicOperation.getPageForRedoRecovery.

If we are in load tran, this page may not exist for the container yet.
We need to create it first.

This routine is called as the last resort of find page, the container
handle has already been found and it is not dropped.



Exceptions



StandardException:
Standard Derby policy.










getTypeFormatIdback to summary

public int getTypeFormatId()
Implements org.apache.derby.iapi.services.io.TypedFormat.getTypeFormatId.

Return my format identifier.



Returns:int
Doc from org.apache.derby.iapi.services.io.TypedFormat.getTypeFormatId.

The identifier. (A UUID stuffed in an array
of 16 bytes).








readExternalback to summary

public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException
Overrides org.apache.derby.impl.store.raw.data.PageBasicOperation.readExternal.

Implements java.io.Externalizable.readExternal.

Read this in



Parameters



in:ObjectInput
Doc from java.io.Externalizable.readExternal.

the stream to read data from in order to restore the object



Exceptions



IOException:
error reading from log stream

ClassNotFoundException:
log stream corrupted










restoreMeback to summary

public void restoreMe(Transaction xact, BasePage undoPage, LogInstant CLRInstant, LimitObjectInput in) throws StandardException, IOException
Implements abstract org.apache.derby.impl.store.raw.data.PageBasicOperation.restoreMe.

restore the before image of the page



Parameters



xact:Transaction
Doc from org.apache.derby.impl.store.raw.data.PageBasicOperation.restoreMe.

the Transaction doing the rollback

undoPage:BasePage
Doc from org.apache.derby.impl.store.raw.data.PageBasicOperation.restoreMe.

the page to rollback changes on

CLRInstant:LogInstant
Doc from org.apache.derby.impl.store.raw.data.PageBasicOperation.restoreMe.

the log instant of this (PageUndo) operation

in:LimitObjectInput
Doc from org.apache.derby.impl.store.raw.data.PageBasicOperation.restoreMe.

optional data for the rollback operation



Exceptions



StandardException:
Standard Derby Error Policy

IOException:
problem reading the complete log record from the input stream










toStringback to summary

public String toString()
Overrides org.apache.derby.impl.store.raw.data.PageBasicOperation.toString.

Doc from java.lang.Object.toString.

Returns a string representation of the object. 
	
Satisfying this method's contract implies a non-null
result must be returned.



Returns:String
a string representation of the object








undoMeback to summary

public void undoMe(Transaction xact, BasePage undoPage, LogInstant CLRInstant, LimitObjectInput in) throws StandardException, IOException
Implements abstract org.apache.derby.impl.store.raw.data.PhysicalPageOperation.undoMe.

Mark the page as free



Parameters



xact:Transaction
Doc from org.apache.derby.impl.store.raw.data.PhysicalPageOperation.undoMe.

the Transaction doing the rollback

undoPage:BasePage
Doc from org.apache.derby.impl.store.raw.data.PhysicalPageOperation.undoMe.

the page to rollback changes on

CLRInstant:LogInstant
Doc from org.apache.derby.impl.store.raw.data.PhysicalPageOperation.undoMe.

the log instant of this (PageUndo) operation

in:LimitObjectInput
Doc from org.apache.derby.impl.store.raw.data.PhysicalPageOperation.undoMe.

optional data for the rollback operation



Exceptions



StandardException:
Thrown by methods I call

IOException:
Thrown by methods I call



See Also

PhysicalPageOperation#undoMe








writeExternalback to summary

public void writeExternal(ObjectOutput out) throws IOException
Overrides org.apache.derby.impl.store.raw.data.PageBasicOperation.writeExternal.

Implements java.io.Externalizable.writeExternal.

Write this out.



Parameters



out:ObjectOutput
Doc from java.io.Externalizable.writeExternal.

the stream to write the object to



Exceptions



IOException:
error writing to log stream