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/**
* Copyright (C) 2022-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 "mongo/db/s/range_deleter_service_op_observer.h"
#include "mongo/db/catalog_raii.h"
#include "mongo/db/persistent_task_store.h"
#include "mongo/db/s/collection_sharding_runtime.h"
#include "mongo/db/s/range_deleter_service.h"
#include "mongo/db/s/range_deletion_task_gen.h"
#include "mongo/db/update/update_oplog_entry_serialization.h"
#include "mongo/logv2/log.h"
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kShardingRangeDeleter
namespace mongo {
namespace {
// Small hack used to be able to retrieve the full removed document in the `onDelete` method
const auto deletedDocumentDecoration = OperationContext::declareDecoration<BSONObj>();
void registerTaskWithOngoingQueriesOnOpLogEntryCommit(OperationContext* opCtx,
const RangeDeletionTask& rdt) {
opCtx->recoveryUnit()->onCommit([opCtx, rdt](boost::optional<Timestamp>) {
try {
AutoGetCollection autoColl(opCtx, rdt.getNss(), MODE_IS);
auto waitForActiveQueriesToComplete =
CollectionShardingRuntime::assertCollectionLockedAndAcquireShared(opCtx,
rdt.getNss())
->getOngoingQueriesCompletionFuture(rdt.getCollectionUuid(), rdt.getRange())
.semi();
(void)RangeDeleterService::get(opCtx)->registerTask(
rdt, std::move(waitForActiveQueriesToComplete));
} catch (const DBException& ex) {
if (ex.code() != ErrorCodes::NotYetInitialized &&
!ErrorCodes::isA<ErrorCategory::NotPrimaryError>(ex.code())) {
LOGV2_WARNING(7092800,
"No error different from `NotYetInitialized` or `NotPrimaryError` "
"category is expected to be propagated to the range deleter "
"observer. Range deletion task not registered.",
"error"_attr = redact(ex),
"task"_attr = rdt);
}
}
});
}
} // namespace
RangeDeleterServiceOpObserver::RangeDeleterServiceOpObserver() = default;
RangeDeleterServiceOpObserver::~RangeDeleterServiceOpObserver() = default;
void RangeDeleterServiceOpObserver::onInserts(OperationContext* opCtx,
const CollectionPtr& coll,
std::vector<InsertStatement>::const_iterator begin,
std::vector<InsertStatement>::const_iterator end,
bool fromMigrate) {
if (coll->ns() == NamespaceString::kRangeDeletionNamespace) {
for (auto it = begin; it != end; ++it) {
auto deletionTask = RangeDeletionTask::parse(
IDLParserContext("RangeDeleterServiceOpObserver"), it->doc);
if (!deletionTask.getPending() || !*(deletionTask.getPending())) {
registerTaskWithOngoingQueriesOnOpLogEntryCommit(opCtx, deletionTask);
}
}
}
}
void RangeDeleterServiceOpObserver::onUpdate(OperationContext* opCtx,
const OplogUpdateEntryArgs& args) {
if (args.coll->ns() == NamespaceString::kRangeDeletionNamespace) {
const bool pendingFieldIsRemoved = [&] {
return update_oplog_entry::isFieldRemovedByUpdate(
args.updateArgs->update, RangeDeletionTask::kPendingFieldName) ==
update_oplog_entry::FieldRemovedStatus::kFieldRemoved;
}();
const bool pendingFieldUpdatedToFalse = [&] {
const auto newValueForPendingField = update_oplog_entry::extractNewValueForField(
args.updateArgs->update, RangeDeletionTask::kPendingFieldName);
return (!newValueForPendingField.eoo() && newValueForPendingField.Bool() == false);
}();
if (pendingFieldIsRemoved || pendingFieldUpdatedToFalse) {
auto deletionTask = RangeDeletionTask::parse(
IDLParserContext("RangeDeleterServiceOpObserver"), args.updateArgs->updatedDoc);
registerTaskWithOngoingQueriesOnOpLogEntryCommit(opCtx, deletionTask);
}
}
}
void RangeDeleterServiceOpObserver::aboutToDelete(OperationContext* opCtx,
const CollectionPtr& coll,
BSONObj const& doc) {
if (coll->ns() == NamespaceString::kRangeDeletionNamespace) {
deletedDocumentDecoration(opCtx) = doc;
}
}
void RangeDeleterServiceOpObserver::onDelete(OperationContext* opCtx,
const CollectionPtr& coll,
StmtId stmtId,
const OplogDeleteEntryArgs& args) {
if (coll->ns() == NamespaceString::kRangeDeletionNamespace) {
const auto& deletedDoc = deletedDocumentDecoration(opCtx);
auto deletionTask =
RangeDeletionTask::parse(IDLParserContext("RangeDeleterServiceOpObserver"), deletedDoc);
try {
RangeDeleterService::get(opCtx)->deregisterTask(deletionTask.getCollectionUuid(),
deletionTask.getRange());
} catch (const DBException& ex) {
dassert(ex.code() == ErrorCodes::NotYetInitialized,
str::stream() << "No error different from `NotYetInitialized` is expected "
"to be propagated to the range deleter observer. Got error: "
<< ex.toStatus());
}
}
}
} // namespace mongo
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