org.apache.derby.impl.store.raw.data
Class InitPageOperation
java.lang.Object
org.apache.derby.impl.store.raw.data.PageBasicOperation
org.apache.derby.impl.store.raw.data.PhysicalPageOperation
org.apache.derby.impl.store.raw.data.InitPageOperation
- All Implemented Interfaces:
- java.io.Externalizable, Formatable, Loggable, RePreparable, java.io.Serializable, TypedFormat, Undoable
- public final class InitPageOperation
- extends PhysicalPageOperation
This operation initializes the page that is being allocated,
this operation does not change the alloc page information.
- See Also:
- Serialized Form
Format ID | LOGOP_INIT_PAGE
the formatId is written by FormatIdOutputStream when this object is
written out by writeObject |
Purpose | initialized a page |
Upgrade | |
Disk Layout | PhysicalPageOperation the superclass
nextRecordId(CompressedInt) the next recordId this page should give out
initFlag(CompressedInt) initialization flag: reuse, overflow
pageformat(int) the page's formatId
OptionalData none |
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 |
Method Summary |
void |
doMe(Transaction xact,
LogInstant instant,
LimitObjectInput in)
Mark the page as valid, and clear out any crud from the page |
protected BasePage |
getPageForLoadTran(Transaction xact)
If we are in load tran, this page may not exist for the container yet.
|
int |
getTypeFormatId()
Return my format identifier. |
void |
readExternal(java.io.ObjectInput in)
Read this in |
void |
restoreMe(Transaction xact,
BasePage undoPage,
LogInstant CLRInstant,
LimitObjectInput in)
restore the before image of the page |
java.lang.String |
toString()
|
void |
undoMe(Transaction xact,
BasePage undoPage,
LogInstant CLRInstant,
LimitObjectInput in)
Mark the page as free |
void |
writeExternal(java.io.ObjectOutput out)
Write this out. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
nextRecordId
protected int nextRecordId
initFlag
protected int initFlag
pageFormatId
protected int pageFormatId
pageOffset
protected long pageOffset
reuse
protected boolean reuse
overflowPage
protected boolean overflowPage
InitPageOperation
public InitPageOperation(BasePage page,
int flag,
int formatid,
long offset)
throws StandardException
InitPageOperation
public InitPageOperation()
writeExternal
public void writeExternal(java.io.ObjectOutput out)
throws java.io.IOException
- Write this out.
- Specified by:
writeExternal
in interface java.io.Externalizable
- Overrides:
writeExternal
in class PageBasicOperation
- Throws:
java.io.IOException
- error writing to log stream
readExternal
public void readExternal(java.io.ObjectInput in)
throws java.io.IOException,
java.lang.ClassNotFoundException
- Read this in
- Specified by:
readExternal
in interface java.io.Externalizable
- Overrides:
readExternal
in class PageBasicOperation
- Throws:
java.io.IOException
- error reading from log stream
java.lang.ClassNotFoundException
- log stream corrupted
getTypeFormatId
public int getTypeFormatId()
- Return my format identifier.
- Returns:
- The identifier. (A UUID stuffed in an array
of 16 bytes).
doMe
public void doMe(Transaction xact,
LogInstant instant,
LimitObjectInput in)
throws StandardException,
java.io.IOException
- Mark the page as valid, and clear out any crud from the page
- Parameters:
xact
- the Transactioninstant
- the log instant of this operationin
- optional data
- Throws:
java.io.IOException
- Can be thrown by any of the methods of ObjectInput.
StandardException
- Standard Cloudscape policy.- See Also:
Loggable.doMe(org.apache.derby.iapi.store.raw.Transaction, org.apache.derby.iapi.store.raw.log.LogInstant, org.apache.derby.iapi.services.io.LimitObjectInput)
getPageForLoadTran
protected BasePage getPageForLoadTran(Transaction xact)
throws StandardException
- 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.
- Overrides:
getPageForLoadTran
in class PageBasicOperation
- Throws:
StandardException
- Standard Cloudscape policy.
undoMe
public void undoMe(Transaction xact,
BasePage undoPage,
LogInstant CLRInstant,
LimitObjectInput in)
throws StandardException,
java.io.IOException
- Mark the page as free
- Specified by:
undoMe
in class PhysicalPageOperation
- 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
- Thrown by methods I call
java.io.IOException
- Thrown by methods I call- See Also:
PhysicalPageOperation.undoMe(org.apache.derby.iapi.store.raw.Transaction, org.apache.derby.impl.store.raw.data.BasePage, org.apache.derby.iapi.store.raw.log.LogInstant, org.apache.derby.iapi.services.io.LimitObjectInput)
restoreMe
public void restoreMe(Transaction xact,
BasePage undoPage,
LogInstant CLRInstant,
LimitObjectInput in)
throws StandardException,
java.io.IOException
- restore the before image of the page
- Specified by:
restoreMe
in class PageBasicOperation
- 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 Cloudscape Error Policy
java.io.IOException
- problem reading the complete log record from the
input stream
toString
public java.lang.String toString()
- Overrides:
toString
in class PageBasicOperation
Apache Derby V10.1 Engine Documentation - Copyright © 1997,2005 The Apache Software Foundation or its licensors, as applicable.