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authorA. Jesse Jiryu Davis <jesse@mongodb.com>2019-09-04 12:24:50 +0000
committerevergreen <evergreen@mongodb.com>2019-09-04 12:24:50 +0000
commit0031fa41177db46789e411895a5bcd33b2847ed5 (patch)
tree3df9f7d75b34942aba828dc46c63c773eafbb24e /src/mongo/db/repl/applier_helpers.h
parent03c012864560206b7d8716584cbe96b4de0235cc (diff)
downloadmongo-0031fa41177db46789e411895a5bcd33b2847ed5.tar.gz
SERVER-42993 Convert static oplog application funcs to free funcs
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-/**
- * Copyright (C) 2018-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.
- */
-
-
-#pragma once
-
-#include "mongo/base/status_with.h"
-#include "mongo/db/repl/multiapplier.h"
-#include "mongo/db/repl/sync_tail.h"
-
-namespace mongo {
-namespace repl {
-
-/**
- * Collection of helper functions and classes for oplog application.
- */
-class ApplierHelpers {
-public:
- using OperationPtrs = MultiApplier::OperationPtrs;
-
- /**
- * Sorts the oplog entries by namespace, so that entries from the same namespace will be next to
- * each other in the list.
- */
- static void stableSortByNamespace(OperationPtrs* oplogEntryPointers);
-
- class InsertGroup;
-};
-
-/**
- * Groups consecutive insert operations on the same namespace and applies the combined operation
- * as a single oplog entry.
- * Advances the the MultiApplier::OperationPtrs iterator if the grouped insert is applied
- * successfully.
- */
-class ApplierHelpers::InsertGroup {
- InsertGroup(const InsertGroup&) = delete;
- InsertGroup& operator=(const InsertGroup&) = delete;
-
-public:
- using ConstIterator = OperationPtrs::const_iterator;
- using Mode = OplogApplication::Mode;
-
- InsertGroup(OperationPtrs* ops, OperationContext* opCtx, Mode mode);
-
- /**
- * Attempts to group insert operations starting at 'iter'.
- * If the grouped insert is applied successfully, returns the iterator to the last standalone
- * insert operation included in the applied grouped insert.
- */
- StatusWith<ConstIterator> groupAndApplyInserts(ConstIterator oplogEntriesIterator);
-
-private:
- // _doNotGroupBeforePoint is used to prevent retrying bad group inserts by marking the final op
- // of a failed group and not allowing further group inserts until that op has been processed.
- ConstIterator _doNotGroupBeforePoint;
-
- // Used for constructing search bounds when grouping inserts.
- ConstIterator _end;
-
- // Passed to _syncApply when applying grouped inserts.
- OperationContext* _opCtx;
- Mode _mode;
-};
-
-} // namespace repl
-} // namespace mongo