StatusWith<CompactStats> compactCollection(OperationContext* opCtx,
Collection* collection,
const CompactOptions* compactOptions) {
dassert(opCtx->lockState()->isCollectionLockedForMode(collection->ns(), MODE_X));
DisableDocumentValidation validationDisabler(opCtx);
auto recordStore = collection->getRecordStore();
auto indexCatalog = collection->getIndexCatalog();
if (!recordStore->compactSupported())
return StatusWith<CompactStats>(ErrorCodes::CommandNotSupported,
str::stream()
<< "cannot compact collection with record store: "
<< recordStore->name());
if (recordStore->compactsInPlace()) {
CompactStats stats;
Status status = recordStore->compact(opCtx);
if (!status.isOK())
return StatusWith<CompactStats>(status);
// Compact all indexes (not including unfinished indexes)
status = indexCatalog->compactIndexes(opCtx);
if (!status.isOK())
return StatusWith<CompactStats>(status);
return StatusWith<CompactStats>(stats);
}
if (indexCatalog->numIndexesInProgress(opCtx))
return StatusWith<CompactStats>(ErrorCodes::BadValue,
"cannot compact when indexes in progress");
std::vector<BSONObj> indexSpecs;
{
std::unique_ptr<IndexCatalog::IndexIterator> ii(
indexCatalog->getIndexIterator(opCtx, false));
while (ii->more()) {
const IndexDescriptor* descriptor = ii->next()->descriptor();
// Compact always creates the new index in the foreground.
const BSONObj spec =
descriptor->infoObj().removeField(IndexDescriptor::kBackgroundFieldName);
const BSONObj key = spec.getObjectField("key");
const Status keyStatus =
index_key_validate::validateKeyPattern(key, descriptor->version());
if (!keyStatus.isOK()) {
return StatusWith<CompactStats>(
ErrorCodes::CannotCreateIndex,
str::stream() << "Cannot compact collection due to invalid index " << spec
<< ": "
<< keyStatus.reason()
<< " For more info see"
<< " http://dochub.mongodb.org/core/index-validation");
}
indexSpecs.push_back(spec);
}
}
// Give a chance to be interrupted *before* we drop all indexes.
opCtx->checkForInterrupt();
{
// note that the drop indexes call also invalidates all clientcursors for the namespace,
// which is important and wanted here
WriteUnitOfWork wunit(opCtx);
log() << "compact dropping indexes";
indexCatalog->dropAllIndexes(opCtx, true);
wunit.commit();
}
CompactStats stats;
MultiIndexBlock indexer;
indexer.ignoreUniqueConstraint(); // in compact we should be doing no checking
// The 'indexer' could throw, so ensure build cleanup occurs.
ON_BLOCK_EXIT([&] { indexer.cleanUpAfterBuild(opCtx, collection); });
Status status =
indexer.init(opCtx, collection, indexSpecs, MultiIndexBlock::kNoopOnInitFn).getStatus();
if (!status.isOK())
return StatusWith<CompactStats>(status);
status = recordStore->compact(opCtx);
if (!status.isOK())
return StatusWith<CompactStats>(status);
log() << "starting index commits";
status = indexer.dumpInsertsFromBulk(opCtx);
if (!status.isOK())
return StatusWith<CompactStats>(status);
{
WriteUnitOfWork wunit(opCtx);
status = indexer.commit(opCtx,
collection,
MultiIndexBlock::kNoopOnCreateEachFn,
MultiIndexBlock::kNoopOnCommitFn);
if (!status.isOK()) {
return StatusWith<CompactStats>(status);
}
wunit.commit();
}
return StatusWith<CompactStats>(stats);
}
