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// collection_info_cache.cpp
/**
* Copyright (C) 2013 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kStorage
#include "mongo/platform/basic.h"
#include "mongo/db/catalog/collection_info_cache.h"
#include "mongo/db/catalog/collection.h"
#include "mongo/db/concurrency/d_concurrency.h"
#include "mongo/db/fts/fts_spec.h"
#include "mongo/db/index/index_descriptor.h"
#include "mongo/db/index_legacy.h"
#include "mongo/db/query/plan_cache.h"
#include "mongo/util/debug_util.h"
#include "mongo/util/log.h"
namespace mongo {
CollectionInfoCache::CollectionInfoCache( Collection* collection )
: _collection( collection ),
_keysComputed( false ),
_planCache(new PlanCache(collection->ns().ns())),
_querySettings(new QuerySettings()) { }
void CollectionInfoCache::reset( OperationContext* txn ) {
LOG(1) << _collection->ns().ns() << ": clearing plan cache - collection info cache reset";
clearQueryCache();
_keysComputed = false;
computeIndexKeys( txn );
// query settings is not affected by info cache reset.
// index filters should persist throughout life of collection
}
void CollectionInfoCache::computeIndexKeys( OperationContext* txn ) {
_indexedPaths.clear();
IndexCatalog::IndexIterator i = _collection->getIndexCatalog()->getIndexIterator(txn, true);
while (i.more()) {
IndexDescriptor* descriptor = i.next();
if (descriptor->getAccessMethodName() != IndexNames::TEXT) {
BSONObj key = descriptor->keyPattern();
BSONObjIterator j(key);
while (j.more()) {
BSONElement e = j.next();
_indexedPaths.addPath(e.fieldName());
}
}
else {
fts::FTSSpec ftsSpec(descriptor->infoObj());
if (ftsSpec.wildcard()) {
_indexedPaths.allPathsIndexed();
}
else {
for (size_t i = 0; i < ftsSpec.numExtraBefore(); ++i) {
_indexedPaths.addPath(ftsSpec.extraBefore(i));
}
for (fts::Weights::const_iterator it = ftsSpec.weights().begin();
it != ftsSpec.weights().end();
++it) {
_indexedPaths.addPath(it->first);
}
for (size_t i = 0; i < ftsSpec.numExtraAfter(); ++i) {
_indexedPaths.addPath(ftsSpec.extraAfter(i));
}
// Any update to a path containing "language" as a component could change the
// language of a subdocument. Add the override field as a path component.
_indexedPaths.addPathComponent(ftsSpec.languageOverrideField());
}
}
}
_keysComputed = true;
}
void CollectionInfoCache::notifyOfWriteOp() {
if (NULL != _planCache.get()) {
_planCache->notifyOfWriteOp();
}
}
void CollectionInfoCache::clearQueryCache() {
if (NULL != _planCache.get()) {
_planCache->clear();
}
}
PlanCache* CollectionInfoCache::getPlanCache() const {
return _planCache.get();
}
QuerySettings* CollectionInfoCache::getQuerySettings() const {
return _querySettings.get();
}
}
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