Class HeapController
- java.lang.Object
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- org.apache.derby.impl.store.access.conglomerate.GenericController
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- org.apache.derby.impl.store.access.conglomerate.GenericConglomerateController
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- org.apache.derby.impl.store.access.heap.HeapController
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- All Implemented Interfaces:
ConglomerateController
,ConglomPropertyQueryable
public class HeapController extends GenericConglomerateController implements ConglomerateController
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Field Summary
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Fields inherited from class org.apache.derby.impl.store.access.conglomerate.GenericController
open_conglom
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Fields inherited from interface org.apache.derby.iapi.store.access.ConglomerateController
LOCK_INS, LOCK_INS_PREVKEY, LOCK_READ, LOCK_UPD, LOCK_UPDATE_LOCKS, ROWISDUPLICATE
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Constructor Summary
Constructors Constructor Description HeapController()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description private RecordHandle
doInsert(DataValueDescriptor[] row)
Insert a new row into the heap.OpenConglomerate
getOpenConglomerate()
Public Methods of XXXX class:protected void
getRowPositionFromRowLocation(RowLocation row_loc, RowPosition pos)
Protected concrete impl of abstract methods of GenericConglomerateController class:protected Page
getUserPageNoWait(long pageno)
protected Page
getUserPageWait(long pageno)
int
insert(DataValueDescriptor[] row)
Public Methods of This class:void
insertAndFetchLocation(DataValueDescriptor[] row, RowLocation templateRowLocation)
insert row and fetch it's row location in one operation.protected long
load(TransactionManager xact_manager, Heap heap, boolean createConglom, RowLocationRetRowSource rowSource)
boolean
lockRow(long page_num, int record_id, int lock_operation, boolean wait, int lock_duration)
Lock the given record id/page num pair.protected boolean
lockRow(RecordHandle rh, int lock_oper, boolean wait, int lock_duration)
boolean
lockRow(RowLocation loc, int lock_operation, boolean wait, int lock_duration)
Lock the given row location.protected boolean
lockRowAtSlotNoWaitExclusive(RecordHandle rh)
RowLocation
newRowLocationTemplate()
Return a row location object of the correct type to be used in calls to insertAndFetchLocation.protected boolean
purgeCommittedDeletes(Page page)
Check and purge committed deleted rows on a page.protected void
queueDeletePostCommitWork(RowPosition pos)
protected void
removePage(Page page)
void
unlockRowAfterRead(RowLocation loc, boolean forUpdate, boolean row_qualified)
UnLock the given row location.-
Methods inherited from class org.apache.derby.impl.store.access.conglomerate.GenericConglomerateController
close, closeForEndTransaction, delete, fetch, fetch, replace
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Methods inherited from class org.apache.derby.impl.store.access.conglomerate.GenericController
checkConsistency, debugConglomerate, getEstimatedRowCount, getInternalTablePropertySet, getOpenConglom, getSpaceInfo, getTableProperties, init, isKeyed, isTableLocked, setEstimatedRowCount
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface org.apache.derby.iapi.store.access.ConglomerateController
checkConsistency, close, closeForEndTransaction, debugConglomerate, delete, fetch, fetch, getSpaceInfo, isKeyed, replace
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Methods inherited from interface org.apache.derby.iapi.store.access.ConglomPropertyQueryable
getInternalTablePropertySet, getTableProperties
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Method Detail
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getRowPositionFromRowLocation
protected final void getRowPositionFromRowLocation(RowLocation row_loc, RowPosition pos) throws StandardException
Protected concrete impl of abstract methods of GenericConglomerateController class:- Overrides:
getRowPositionFromRowLocation
in classGenericController
- Throws:
StandardException
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queueDeletePostCommitWork
protected void queueDeletePostCommitWork(RowPosition pos) throws StandardException
- Overrides:
queueDeletePostCommitWork
in classGenericController
- Throws:
StandardException
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purgeCommittedDeletes
protected final boolean purgeCommittedDeletes(Page page) throws StandardException
Check and purge committed deleted rows on a page.- Parameters:
page
- A non-null, latched page must be passed in. If all rows on page are purged, then page will be removed and latch released.- Returns:
- true, if no purging has been done on page, and thus latch can be released before end transaction. Otherwise the latch on the page can not be released before commit.
- Throws:
StandardException
- Standard exception policy.
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doInsert
private RecordHandle doInsert(DataValueDescriptor[] row) throws StandardException
Insert a new row into the heap.Overflow policy: The current heap access method implements an algorithm that optimizes for fetch efficiency vs. space efficiency. A row will not be over flowed unless it is bigger than a page. If it is bigger than a page then it's initial part will be placed on a page and then subsequent parts will be overflowed to other pages.
- Parameters:
row
- The row to insert.- Returns:
- The record handle of the inserted row.
- Throws:
StandardException
- Standard exception policy.
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load
protected long load(TransactionManager xact_manager, Heap heap, boolean createConglom, RowLocationRetRowSource rowSource) throws StandardException
- Throws:
StandardException
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lockRow
protected boolean lockRow(RecordHandle rh, int lock_oper, boolean wait, int lock_duration) throws StandardException
- Throws:
StandardException
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getUserPageNoWait
protected Page getUserPageNoWait(long pageno) throws StandardException
- Throws:
StandardException
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getUserPageWait
protected Page getUserPageWait(long pageno) throws StandardException
- Throws:
StandardException
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lockRowAtSlotNoWaitExclusive
protected boolean lockRowAtSlotNoWaitExclusive(RecordHandle rh) throws StandardException
- Throws:
StandardException
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removePage
protected void removePage(Page page) throws StandardException
- Throws:
StandardException
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insert
public int insert(DataValueDescriptor[] row) throws StandardException
Public Methods of This class:- Specified by:
insert
in interfaceConglomerateController
- Parameters:
row
- The row to insert into the conglomerate. The stored representations of the row's columns are copied into a new row somewhere in the conglomerate.- Returns:
- Returns 0 if insert succeeded. Returns ConglomerateController.ROWISDUPLICATE if conglomerate supports uniqueness checks and has been created to disallow duplicates, and the row inserted had key columns which were duplicate of a row already in the table. Other insert failures will raise StandardException's.
- Throws:
StandardException
- Standard exception policy.- See Also:
RowUtil
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insertAndFetchLocation
public void insertAndFetchLocation(DataValueDescriptor[] row, RowLocation templateRowLocation) throws StandardException
Description copied from interface:ConglomerateController
insert row and fetch it's row location in one operation.Insert a row into the conglomerate, and store its location in the provided destination row location. The row location must be of the correct type for this conglomerate (a new row location of the correct type can be obtained from newRowLocationTemplate()).
- Specified by:
insertAndFetchLocation
in interfaceConglomerateController
- Parameters:
row
- The row to insert into the conglomerate. The stored representations of the row's columns are copied into a new row somewhere in the conglomerate.templateRowLocation
- The rowlocation to read the inserted row location into.- Throws:
StandardException
- Standard exception policy.- See Also:
RowUtil
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lockRow
public boolean lockRow(RowLocation loc, int lock_operation, boolean wait, int lock_duration) throws StandardException
Lock the given row location.Should only be called by access.
This call can be made on a ConglomerateController that was opened for locking only.
RESOLVE (mikem) - move this call to ConglomerateManager so it is obvious that non-access clients should not call this.
- Specified by:
lockRow
in interfaceConglomerateController
- Parameters:
loc
- The "RowLocation" which describes the exact row to lock.wait
- Should the lock call wait to be granted?lock_operation
- For what operation are we requesting the lock, this should be one of the following 4 options: LOCK_READ [read lock], (LOCK_INS | LOCK_UPD) [ lock for insert], (LOCK_INSERT_PREVKEY | LOCK_UPD) [lock for previous key to insert], (LOCK_UPD) [lock for delete or replace] (LOCK_UPD | LOCK_UPDATE_LOCKS) [lock scan for update, will upgrade lock later if actual update is take place]lock_duration
- If set to TransactionManager.LOCK_INSTANT_DURATION, then lock will be released immediately after being granted.- Returns:
- true if lock was granted, only can be false if wait was false.
- Throws:
StandardException
- Standard exception policy.
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unlockRowAfterRead
public void unlockRowAfterRead(RowLocation loc, boolean forUpdate, boolean row_qualified) throws StandardException
UnLock the given row location.Should only be called by access.
This call can be made on a ConglomerateController that was opened for locking only.
RESOLVE (mikem) - move this call to ConglomerateManager so it is obvious that non-access clients should not call this.
- Specified by:
unlockRowAfterRead
in interfaceConglomerateController
- Parameters:
loc
- The "RowLocation" which describes the row to unlock.forUpdate
- Row was previously Locked the record for read or update.row_qualified
- Row was qualified and returned to the user.- Throws:
StandardException
- Standard exception policy.
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lockRow
public boolean lockRow(long page_num, int record_id, int lock_operation, boolean wait, int lock_duration) throws StandardException
Lock the given record id/page num pair.Should only be called by access, to lock "special" locks formed from the Recordhandle.* reserved constants for page specific locks.
This call can be made on a ConglomerateController that was opened for locking only.
RESOLVE (mikem) - move this call to ConglomerateManager so it is obvious that non-access clients should not call this.
- Specified by:
lockRow
in interfaceConglomerateController
- Parameters:
page_num
- Page number of row to lock.record_id
- Record id of row on page_num to lock.lock_operation
- Desc of what to lock for, ie. update, insert ...wait
- Should the lock call wait to be granted?lock_duration
- If set to TransactionManager.LOCK_INSTANT_DURATION, then lock will be released immediately after being granted.- Returns:
- true if lock was granted, only can be false if wait was false.
- Throws:
StandardException
- Standard exception policy.
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newRowLocationTemplate
public RowLocation newRowLocationTemplate() throws StandardException
Description copied from interface:ConglomerateController
Return a row location object of the correct type to be used in calls to insertAndFetchLocation.- Specified by:
newRowLocationTemplate
in interfaceConglomerateController
- Overrides:
newRowLocationTemplate
in classGenericController
- Throws:
StandardException
- Standard exception policy.
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getOpenConglomerate
public OpenConglomerate getOpenConglomerate()
Public Methods of XXXX class:
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