SERVER-58960 Add benchmarks to measure the overhead from ShardingWriteRouter on the write codepath

1 files changed, 61 insertions, 0 deletions

diff --git a/src/mongo/s/catalog_cache_mock.cpp b/src/mongo/s/catalog_cache_mock.cpp
new file mode 100644
index 00000000000..706b6a836d8
--- /dev/null
+++ b/src/mongo/s/catalog_cache_mock.cpp
@@ -0,0 +1,61 @@
+/**
+ *    Copyright (C) 2021-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/s/catalog_cache_mock.h"
+#include "mongo/db/service_context.h"
+#include "mongo/s/catalog_cache_loader_mock.h"
+
+namespace mongo {
+
+const Status CatalogCacheMock::kChunkManagerInternalErrorStatus = {
+    ErrorCodes::InternalError, "Mocked catalog cache received unexpected chunks manager"};
+
+
+CatalogCacheMock::CatalogCacheMock(ServiceContext* serviceContext, CatalogCacheLoaderMock& loader)
+    : CatalogCache(serviceContext, loader) {}
+
+StatusWith<ChunkManager> CatalogCacheMock::getCollectionRoutingInfo(OperationContext* opCtx,
+                                                                    const NamespaceString& nss,
+                                                                    bool allowLocks) {
+    return _swChunkManagerReturnValue;
+}
+
+void CatalogCacheMock::setChunkManagerReturnValue(StatusWith<ChunkManager> statusWithChunks) {
+    _swChunkManagerReturnValue = statusWithChunks;
+}
+void CatalogCacheMock::clearChunkManagerReturnValue() {
+    _swChunkManagerReturnValue = kChunkManagerInternalErrorStatus;
+}
+
+std::unique_ptr<CatalogCacheMock> CatalogCacheMock::make() {
+    auto catalogCacheLoader = std::make_unique<CatalogCacheLoaderMock>();
+    auto serviceContext = ServiceContext::make();
+    return std::make_unique<CatalogCacheMock>(serviceContext.get(), *catalogCacheLoader);
+}
+}  // namespace mongo