342 lines
9.4 KiB
C++
342 lines
9.4 KiB
C++
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//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1991 - 2000.
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//
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// File: CHANGES.CXX
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//
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// Contents: Table of changes
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//
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// Classes: CChange CPartQueue
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//
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// History: 29-Mar-91 BartoszM Created
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//
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//----------------------------------------------------------------------------
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#include <pch.cxx>
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#pragma hdrstop
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#include <glbconst.hxx>
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#include "indxact.hxx"
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#include "changes.hxx"
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#define CI_PRIORITY_INVALID CI_PRIORITIES
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//+---------------------------------------------------------------------------
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//
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// Member: CChange::CChange, public
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//
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// Arguments: [storage] -- physical storage
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//
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// History: 29-Mar-91 BartoszM Created
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//
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//----------------------------------------------------------------------------
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CChange::CChange (
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WORKID wid,
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PStorage& storage,
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CCiFrameworkParams & frmwrkParams ) :
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_frmwrkParams( frmwrkParams ),
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_queue( wid, storage, PStorage::ePrimChangeLog, frmwrkParams ),
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_secQueue( wid, storage, PStorage::eSecChangeLog, frmwrkParams )
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{
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Win4Assert( sizeof(FILETIME) == sizeof(LONGLONG) );
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GetSystemTimeAsFileTime( (FILETIME *) &_ftLast );
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CChange::LokEmpty, public
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//
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// Synopsis: Initializes changes object so it looks new/empty
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//
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// Notes: ResMan LOCKED
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//
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// History: 15-Nov-94 DwightKr Created
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//
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//----------------------------------------------------------------------------
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void CChange::LokEmpty()
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{
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_queue.LokEmpty();
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_secQueue.LokEmpty();
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CChange::LokCompact, public
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//
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// Synopsis: Frees memory not currently in use.
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//
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// Notes: ResMan LOCKED
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//
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// History: 19-May-92 BartoszM Created
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//
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//----------------------------------------------------------------------------
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void CChange::LokCompact()
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{
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CChange::LokGetPendingUpdates
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//
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// Synopsis: Like QueryPendingUpdates, but doesn't remove documents from
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// queue, and doesn't require a transaction (no deserialization).
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//
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// Arguments: [aWid] -- Workids returned here.
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// [cWid] -- INPUT: Maximum number of entries to fetch.
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// OUTPUT: Number of entries fetched.
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//
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// Returns: TRUE if all change entries were processed.
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//
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// History: 15-Nov-94 KyleP Created
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//
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// Notes: ResMan LOCKED
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//
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//----------------------------------------------------------------------------
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BOOL CChange::LokGetPendingUpdates( WORKID * aWid, unsigned & cWid )
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{
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if ( _queue.IsEmpty() && _secQueue.IsEmpty() )
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{
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cWid = 0;
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return TRUE;
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}
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else
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{
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const unsigned cMax = cWid;
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unsigned cPrim = 0; // count of wids from primary
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unsigned cSec = 0; // count of wids from secondary
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BOOL fSuccess = TRUE;
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if ( !_queue.IsEmpty() )
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{
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cPrim = cMax;
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fSuccess = _queue.Get(aWid, cPrim);
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}
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if ( fSuccess && !_secQueue.IsEmpty() )
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{
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Win4Assert( cPrim <= cMax );
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cSec = cMax-cPrim;
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fSuccess = _secQueue.Get( aWid+cPrim, cSec );
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}
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Win4Assert( cPrim + cSec <= cMax );
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cWid = cPrim+cSec;
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return fSuccess;
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}
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CChange::LokQueryPendingUpdates
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//
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// Synopsis: Checks update queues, returns list of documents
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//
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// Arguments: [xact] -- transaction
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// [maxDocs] -- maximum # of updates acceptable
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// [docList] -- (returned) list of documents,
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// initially empty.
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//
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// Returns: An array of document descriptors (or NULL)
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//
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// History: 25-Sept-91 BartoszM Created
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//
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// Notes: ResMan LOCKED
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//
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//----------------------------------------------------------------------------
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void CChange::LokQueryPendingUpdates (
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CChangeTrans & xact,
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unsigned maxDocs,
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CDocList& docList )
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{
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ciDebugOut (( DEB_ITRACE, "Query Pending Updates\n" ));
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if ( !_queue.IsEmpty() )
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{
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_queue.Extract( xact, maxDocs, docList );
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}
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else
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{
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docList.LokSetCount(0);
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return;
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}
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CChange::LokDone, public
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//
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// Synopsis: After creating a volatile index marks
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// entries in table done. Stores actual index id.
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//
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// Arguments: [xact] -- transaction
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// [iid] -- index id
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// [docList] -- array of document descriptors
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//
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// History: 26-Apr-91 BartoszM Created
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//
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// Notes: ResMan LOCKED
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//
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//----------------------------------------------------------------------------
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void CChange::LokDone ( CChangeTrans & xact, INDEXID iid, CDocList& docList )
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{
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ciDebugOut (( DEB_ITRACE, "Changes: Done\n" ));
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int cDoc = docList.Count();
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//
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// Look for PENDING or PREEMPTED documents, which must be reindexed.
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//
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for ( int i = 0; i < cDoc; i++ )
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{
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STATUS status = docList.Status(i);
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if ( status == PREEMPTED || status == PENDING )
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{
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_queue.Append( xact,
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docList.Wid(i),
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docList.Usn(i),
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docList.VolumeId(i),
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CI_UPDATE_OBJ,
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docList.Retries(i),
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docList.SecQRetries(i)
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);
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}
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}
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CChange::LokRemoveIndexes, public
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//
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// Synopsis: Remove entries from the table after volatile indexes
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// have been merged away.
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//
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// Arguments: [cIndexes] -- count of index ids
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// [aIndexIds] -- array of index ids
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//
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// History: 26-Apr-91 BartoszM Created
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// 14-May-91 BartoszM Implemented
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//
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// Notes: ResMan LOCKED
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//
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//----------------------------------------------------------------------------
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void CChange::LokRemoveIndexes (
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CTransaction& xact,
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unsigned cIndexes,
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INDEXID aIndexIds[] )
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{
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ciDebugOut (( DEB_ITRACE, "Changes: Remove Indexes\n" ));
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CChange::LokAddToSecQueue
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//
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// Synopsis: Adds the document to the secondary change queue.
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//
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// Arguments: [xact] -- Change transaction
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// [wid] -- Workid
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// [volumeId] -- Volume id
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// [cSecQRetries] -- Sec Q Retry Count
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//
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// History: 5-08-96 srikants Created
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//
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//----------------------------------------------------------------------------
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void CChange::LokAddToSecQueue( CChangeTrans & xact, WORKID wid, VOLUMEID volumeId, ULONG cSecQRetries )
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{
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USN usn = 0;
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ULONG action = CI_UPDATE_OBJ;
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ciDebugOut(( DEB_TRACE,
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"Refiling wid %d (0x%X) to secondary queue\n", wid, wid ));
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SCODE sc = _secQueue.Append( xact,
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wid,
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usn,
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volumeId,
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action,
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1, // retries (reset for sharing viol)
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cSecQRetries
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);
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if ( S_OK != sc )
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{
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ciDebugOut(( DEB_ERROR, "LokAddToSecQueue returned 0x%X\n", sc ));
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}
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CChange::LokRefileSecQueue
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//
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// Synopsis: Moves items from seconday queue to primary queue
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//
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// Arguments: [xact] - Change transaction
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//
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// History: 5-08-96 srikants Created
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//
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//----------------------------------------------------------------------------
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void CChange::LokRefileSecQueue( CChangeTrans & xact )
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{
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// convert the retry interval from minutes into 100s of nano seconds
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const LONGLONG eXferInterval =
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_frmwrkParams.GetFilterRetryInterval() * 60 * 1000 * 10000;
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LONGLONG ftNow;
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GetSystemTimeAsFileTime( (FILETIME *) &ftNow );
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LONGLONG llDelta = ftNow - _ftLast;
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if ( llDelta > 0 && !_secQueue.IsEmpty() )
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{
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if ( llDelta < eXferInterval )
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return;
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CDocList docList;
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while ( !_secQueue.IsEmpty() )
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{
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docList.LokClear();
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_secQueue.Extract( xact, CI_MAX_DOCS_IN_WORDLIST, docList );
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for ( unsigned i = 0; i < docList.Count(); i++ )
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{
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ciDebugOut(( DEB_TRACE,
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"Transferring wid %d (0x%X) from secondary to primary queue\n",
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docList.Wid(i),
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docList.Wid(i) ));
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_queue.Append ( xact,
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docList.Wid(i),
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docList.Usn(i),
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docList.VolumeId(i),
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CI_UPDATE_OBJ,
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docList.Retries(i),
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docList.SecQRetries(i) );
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}
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}
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_secQueue.LokEmpty();
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}
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_ftLast = ftNow;
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}
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