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/**
* Copyright (C) 2017 MongoDB 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::kIndex
#include "mongo/platform/basic.h"
#include "mongo/db/catalog/index_catalog.h"
#include "mongo/db/index/index_descriptor.h"
namespace mongo {
IndexCatalog::IndexIterator::IndexIterator(OperationContext* opCtx,
IndexCatalogEntryContainer::const_iterator beginIterator,
IndexCatalogEntryContainer::const_iterator endIterator,
bool includeUnfinishedIndexes)
: _includeUnfinishedIndexes(includeUnfinishedIndexes),
_opCtx(opCtx),
_iterator(beginIterator),
_endIterator(endIterator),
_start(true),
_prev(nullptr),
_next(nullptr) {}
bool IndexCatalog::IndexIterator::more() {
if (_start) {
_advance();
_start = false;
}
return _next != nullptr;
}
IndexDescriptor* IndexCatalog::IndexIterator::next() {
if (!more())
return nullptr;
_prev = _next;
_advance();
return _prev->descriptor();
}
IndexAccessMethod* IndexCatalog::IndexIterator::accessMethod(const IndexDescriptor* desc) {
invariant(desc == _prev->descriptor());
return _prev->accessMethod();
}
IndexCatalogEntry* IndexCatalog::IndexIterator::catalogEntry(const IndexDescriptor* desc) {
invariant(desc == _prev->descriptor());
return _prev;
}
void IndexCatalog::IndexIterator::_advance() {
_next = nullptr;
while (_iterator != _endIterator) {
IndexCatalogEntry* entry = _iterator->get();
++_iterator;
if (!_includeUnfinishedIndexes) {
if (auto minSnapshot = entry->getMinimumVisibleSnapshot()) {
if (auto mySnapshot = _opCtx->recoveryUnit()->getPointInTimeReadTimestamp()) {
if (mySnapshot < minSnapshot) {
// This index isn't finished in my snapshot.
continue;
}
}
}
if (!entry->isReady(_opCtx))
continue;
}
_next = entry;
return;
}
}
} // namespace mongo
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