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/**
* Copyright (C) 2020-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* 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
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* 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 Server Side 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.
*/
#include <fmt/format.h>
#include "mongo/db/active_index_builds.h"
#include "mongo/db/catalog/index_builds_manager.h"
#include "mongo/logv2/log.h"
#include <boost/iterator/transform_iterator.hpp>
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kStorage
namespace mongo {
ActiveIndexBuilds::~ActiveIndexBuilds() {
invariant(_allIndexBuilds.empty());
}
void ActiveIndexBuilds::waitForAllIndexBuildsToStopForShutdown(OperationContext* opCtx) {
stdx::unique_lock<Latch> lk(_mutex);
// All index builds should have been signaled to stop via the ServiceContext.
if (_allIndexBuilds.empty()) {
return;
}
auto indexBuildToUUID = [](const auto& indexBuild) { return indexBuild.first; };
auto begin = boost::make_transform_iterator(_allIndexBuilds.begin(), indexBuildToUUID);
auto end = boost::make_transform_iterator(_allIndexBuilds.end(), indexBuildToUUID);
LOGV2(4725201,
"Waiting until the following index builds are finished",
"indexBuilds"_attr = logv2::seqLog(begin, end));
// Wait for all the index builds to stop.
auto pred = [this]() { return _allIndexBuilds.empty(); };
_indexBuildsCondVar.wait(lk, pred);
}
void ActiveIndexBuilds::assertNoIndexBuildInProgress() const {
stdx::unique_lock<Latch> lk(_mutex);
if (!_allIndexBuilds.empty()) {
auto firstIndexBuild = _allIndexBuilds.cbegin()->second;
uasserted(ErrorCodes::BackgroundOperationInProgressForDatabase,
fmt::format("cannot perform operation: there are currently {} index builds "
"running. Found index build: {}",
_allIndexBuilds.size(),
firstIndexBuild->buildUUID.toString()));
}
}
void ActiveIndexBuilds::waitUntilAnIndexBuildFinishes(OperationContext* opCtx) {
stdx::unique_lock<Latch> lk(_mutex);
if (_allIndexBuilds.empty()) {
return;
}
const auto generation = _indexBuildsCompletedGen;
opCtx->waitForConditionOrInterrupt(
_indexBuildsCondVar, lk, [&] { return _indexBuildsCompletedGen != generation; });
}
void ActiveIndexBuilds::sleepIndexBuilds_forTestOnly(bool sleep) {
stdx::unique_lock<Latch> lk(_mutex);
_sleepForTest = sleep;
}
void ActiveIndexBuilds::verifyNoIndexBuilds_forTestOnly() const {
stdx::unique_lock<Latch> lk(_mutex);
invariant(_allIndexBuilds.empty());
}
void ActiveIndexBuilds::awaitNoIndexBuildInProgressForCollection(OperationContext* opCtx,
const UUID& collectionUUID,
IndexBuildProtocol protocol) {
stdx::unique_lock<Latch> lk(_mutex);
auto noIndexBuildsPred = [&, this]() {
auto indexBuilds = _filterIndexBuilds_inlock(lk, [&](const auto& replState) {
return collectionUUID == replState.collectionUUID && protocol == replState.protocol;
});
return indexBuilds.empty();
};
opCtx->waitForConditionOrInterrupt(_indexBuildsCondVar, lk, noIndexBuildsPred);
}
void ActiveIndexBuilds::awaitNoIndexBuildInProgressForCollection(OperationContext* opCtx,
const UUID& collectionUUID) {
stdx::unique_lock<Latch> lk(_mutex);
auto pred = [&, this]() {
auto indexBuilds = _filterIndexBuilds_inlock(
lk, [&](const auto& replState) { return collectionUUID == replState.collectionUUID; });
return indexBuilds.empty();
};
_indexBuildsCondVar.wait(lk, pred);
}
StatusWith<std::shared_ptr<ReplIndexBuildState>> ActiveIndexBuilds::getIndexBuild(
const UUID& buildUUID) const {
stdx::unique_lock<Latch> lk(_mutex);
auto it = _allIndexBuilds.find(buildUUID);
if (it == _allIndexBuilds.end()) {
return {ErrorCodes::NoSuchKey, str::stream() << "No index build with UUID: " << buildUUID};
}
return it->second;
}
void ActiveIndexBuilds::unregisterIndexBuild(
IndexBuildsManager* indexBuildsManager,
std::shared_ptr<ReplIndexBuildState> replIndexBuildState) {
stdx::unique_lock<Latch> lk(_mutex);
invariant(_allIndexBuilds.erase(replIndexBuildState->buildUUID));
LOGV2_DEBUG(4656004,
1,
"Index build: unregistering",
"buildUUID"_attr = replIndexBuildState->buildUUID,
"collectionUUID"_attr = replIndexBuildState->collectionUUID);
indexBuildsManager->unregisterIndexBuild(replIndexBuildState->buildUUID);
_indexBuildsCompletedGen++;
_indexBuildsCondVar.notify_all();
}
std::vector<std::shared_ptr<ReplIndexBuildState>> ActiveIndexBuilds::filterIndexBuilds(
IndexBuildFilterFn indexBuildFilter) const {
stdx::unique_lock<Latch> lk(_mutex);
return _filterIndexBuilds_inlock(lk, indexBuildFilter);
}
std::vector<std::shared_ptr<ReplIndexBuildState>> ActiveIndexBuilds::_filterIndexBuilds_inlock(
WithLock lk, IndexBuildFilterFn indexBuildFilter) const {
std::vector<std::shared_ptr<ReplIndexBuildState>> indexBuilds;
for (auto pair : _allIndexBuilds) {
auto replState = pair.second;
if (!indexBuildFilter(*replState)) {
continue;
}
indexBuilds.push_back(replState);
}
return indexBuilds;
}
void ActiveIndexBuilds::awaitNoBgOpInProgForDb(OperationContext* opCtx, StringData db) {
stdx::unique_lock<Latch> lk(_mutex);
auto indexBuildFilter = [db](const auto& replState) { return db == replState.dbName; };
auto pred = [&, this]() {
auto dbIndexBuilds = _filterIndexBuilds_inlock(lk, indexBuildFilter);
return dbIndexBuilds.empty();
};
_indexBuildsCondVar.wait(lk, pred);
}
Status ActiveIndexBuilds::registerIndexBuild(
std::shared_ptr<ReplIndexBuildState> replIndexBuildState) {
stdx::unique_lock<Latch> lk(_mutex);
// Check whether any indexes are already being built with the same index name(s). (Duplicate
// specs will be discovered by the index builder.)
auto pred = [&](const auto& replState) {
return replIndexBuildState->collectionUUID == replState.collectionUUID;
};
auto collIndexBuilds = _filterIndexBuilds_inlock(lk, pred);
for (auto existingIndexBuild : collIndexBuilds) {
for (const auto& name : replIndexBuildState->indexNames) {
if (existingIndexBuild->indexNames.end() !=
std::find(existingIndexBuild->indexNames.begin(),
existingIndexBuild->indexNames.end(),
name)) {
return existingIndexBuild->onConflictWithNewIndexBuild(*replIndexBuildState, name);
}
}
}
invariant(_allIndexBuilds.emplace(replIndexBuildState->buildUUID, replIndexBuildState).second);
_indexBuildsCondVar.notify_all();
return Status::OK();
}
size_t ActiveIndexBuilds::getActiveIndexBuilds() const {
stdx::unique_lock<Latch> lk(_mutex);
return _allIndexBuilds.size();
}
void ActiveIndexBuilds::appendBuildInfo(const UUID& buildUUID, BSONObjBuilder* builder) const {
stdx::unique_lock<Latch> lk(_mutex);
auto it = _allIndexBuilds.find(buildUUID);
if (it == _allIndexBuilds.end()) {
return;
}
it->second->appendBuildInfo(builder);
}
void ActiveIndexBuilds::sleepIfNecessary_forTestOnly() const {
stdx::unique_lock<Latch> lk(_mutex);
while (_sleepForTest) {
lk.unlock();
sleepmillis(100);
lk.lock();
}
}
} // namespace mongo
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