StatusWith<DiskLoc> Collection::updateDocument( const DiskLoc& oldLocation,
const BSONObj& objNew,
bool enforceQuota,
OpDebug* debug ) {
Record* oldRecord = _recordStore->recordFor( oldLocation );
BSONObj objOld( oldRecord->accessed()->data() );
if ( objOld.hasElement( "_id" ) ) {
BSONElement oldId = objOld["_id"];
BSONElement newId = objNew["_id"];
if ( oldId != newId )
return StatusWith<DiskLoc>( ErrorCodes::InternalError,
"in Collection::updateDocument _id mismatch",
13596 );
}
if ( ns().coll() == "system.users" ) {
// XXX - andy and spencer think this should go away now
V2UserDocumentParser parser;
Status s = parser.checkValidUserDocument(objNew);
if ( !s.isOK() )
return StatusWith<DiskLoc>( s );
}
/* duplicate key check. we descend the btree twice - once for this check, and once for the actual inserts, further
below. that is suboptimal, but it's pretty complicated to do it the other way without rollbacks...
*/
OwnedPointerMap<IndexDescriptor*,UpdateTicket> updateTickets;
IndexCatalog::IndexIterator ii = _indexCatalog.getIndexIterator( true );
while ( ii.more() ) {
IndexDescriptor* descriptor = ii.next();
IndexAccessMethod* iam = _indexCatalog.getIndex( descriptor );
InsertDeleteOptions options;
options.logIfError = false;
options.dupsAllowed =
!(KeyPattern::isIdKeyPattern(descriptor->keyPattern()) || descriptor->unique())
|| ignoreUniqueIndex(descriptor);
UpdateTicket* updateTicket = new UpdateTicket();
updateTickets.mutableMap()[descriptor] = updateTicket;
Status ret = iam->validateUpdate(objOld, objNew, oldLocation, options, updateTicket );
if ( !ret.isOK() ) {
return StatusWith<DiskLoc>( ret );
}
}
if ( oldRecord->netLength() < objNew.objsize() ) {
// doesn't fit, have to move to new location
if ( _details->isCapped() )
return StatusWith<DiskLoc>( ErrorCodes::InternalError,
"failing update: objects in a capped ns cannot grow",
10003 );
moveCounter.increment();
_details->paddingTooSmall();
// unindex old record, don't delete
// this way, if inserting new doc fails, we can re-index this one
_cursorCache.invalidateDocument(oldLocation, INVALIDATION_DELETION);
_indexCatalog.unindexRecord( objOld, oldLocation, true );
if ( debug ) {
if (debug->nmoved == -1) // default of -1 rather than 0
debug->nmoved = 1;
else
debug->nmoved += 1;
}
StatusWith<DiskLoc> loc = _insertDocument( objNew, enforceQuota );
if ( loc.isOK() ) {
// insert successful, now lets deallocate the old location
// remember its already unindexed
_recordStore->deleteRecord( oldLocation );
}
else {
// new doc insert failed, so lets re-index the old document and location
_indexCatalog.indexRecord( objOld, oldLocation );
}
return loc;
}
_infoCache.notifyOfWriteOp();
_details->paddingFits();
if ( debug )
debug->keyUpdates = 0;
ii = _indexCatalog.getIndexIterator( true );
while ( ii.more() ) {
IndexDescriptor* descriptor = ii.next();
IndexAccessMethod* iam = _indexCatalog.getIndex( descriptor );
int64_t updatedKeys;
Status ret = iam->update(*updateTickets.mutableMap()[descriptor], &updatedKeys);
if ( !ret.isOK() )
return StatusWith<DiskLoc>( ret );
if ( debug )
debug->keyUpdates += updatedKeys;
}
// Broadcast the mutation so that query results stay correct.
_cursorCache.invalidateDocument(oldLocation, INVALIDATION_MUTATION);
// update in place
int sz = objNew.objsize();
memcpy(getDur().writingPtr(oldRecord->data(), sz), objNew.objdata(), sz);
return StatusWith<DiskLoc>( oldLocation );
}
BSONObj Collection::docFor( const DiskLoc& loc ) {
Record* rec = getExtentManager()->recordFor( loc );
return BSONObj::make( rec->accessed() );
}
BSONObj Collection::docFor( const DiskLoc& loc ) {
Record* rec = _recordStore->recordFor( loc );
return BSONObj( rec->accessed()->data() );
}