SERVER-28793 unit tests for ShardServerCatalogCacheLoader in primary mode

1 files changed, 137 insertions, 0 deletions

diff --git a/src/mongo/db/s/catalog_cache_loader_mock.cpp b/src/mongo/db/s/catalog_cache_loader_mock.cpp
new file mode 100644
index 00000000000..d5dbe15c50e
--- /dev/null
+++ b/src/mongo/db/s/catalog_cache_loader_mock.cpp
@@ -0,0 +1,137 @@
+/**
+ *    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.
+ */
+
+#include "mongo/platform/basic.h"
+
+#include "mongo/db/s/catalog_cache_loader_mock.h"
+
+#include "mongo/db/operation_context.h"
+#include "mongo/s/catalog/type_chunk.h"
+#include "mongo/s/catalog/type_collection.h"
+#include "mongo/stdx/thread.h"
+
+namespace mongo {
+
+using CollectionAndChangedChunks = CatalogCacheLoader::CollectionAndChangedChunks;
+
+namespace {
+
+/**
+ * Constructs the options for the loader thread pool.
+ */
+ThreadPool::Options makeDefaultThreadPoolOptions() {
+    ThreadPool::Options options;
+    options.poolName = "CatalogCacheLoaderMock";
+    options.minThreads = 0;
+    options.maxThreads = 1;
+
+    // Ensure all threads have a client.
+    options.onCreateThread = [](const std::string& threadName) {
+        Client::initThread(threadName.c_str());
+    };
+
+    return options;
+}
+
+}  // namespace
+
+CatalogCacheLoaderMock::CatalogCacheLoaderMock() : _threadPool(makeDefaultThreadPoolOptions()) {
+    _threadPool.startup();
+}
+
+CatalogCacheLoaderMock::~CatalogCacheLoaderMock() {
+    _threadPool.shutdown();
+    _threadPool.join();
+}
+
+void CatalogCacheLoaderMock::initializeReplicaSetRole(bool isPrimary) {
+    MONGO_UNREACHABLE;
+}
+
+void CatalogCacheLoaderMock::onStepDown() {
+    MONGO_UNREACHABLE;
+}
+
+void CatalogCacheLoaderMock::onStepUp() {
+    MONGO_UNREACHABLE;
+}
+
+void CatalogCacheLoaderMock::notifyOfCollectionVersionUpdate(const NamespaceString& nss) {
+    MONGO_UNREACHABLE;
+}
+
+Status CatalogCacheLoaderMock::waitForCollectionVersion(OperationContext* opCtx,
+                                                        const NamespaceString& nss,
+                                                        const ChunkVersion& version) {
+    MONGO_UNREACHABLE;
+}
+
+std::shared_ptr<Notification<void>> CatalogCacheLoaderMock::getChunksSince(
+    const NamespaceString& nss,
+    ChunkVersion version,
+    stdx::function<void(OperationContext*, StatusWith<CollectionAndChangedChunks>)> callbackFn) {
+
+    auto notify = std::make_shared<Notification<void>>();
+
+    uassertStatusOK(_threadPool.schedule([ this, notify, callbackFn ]() noexcept {
+        auto opCtx = Client::getCurrent()->makeOperationContext();
+
+        auto swCollAndChunks = [&]() -> StatusWith<CollectionAndChangedChunks> {
+            try {
+                uassertStatusOK(_swCollectionReturnValue);
+                uassertStatusOK(_swChunksReturnValue);
+
+                return CollectionAndChangedChunks{
+                    _swCollectionReturnValue.getValue().getEpoch(),
+                    _swCollectionReturnValue.getValue().getKeyPattern().toBSON(),
+                    _swCollectionReturnValue.getValue().getDefaultCollation(),
+                    _swCollectionReturnValue.getValue().getUnique(),
+                    _swChunksReturnValue.getValue()};
+            } catch (const DBException& ex) {
+                return ex.toStatus();
+            }
+        }();
+
+        callbackFn(opCtx.get(), std::move(swCollAndChunks));
+        notify->set();
+    }));
+
+    return notify;
+}
+
+void CatalogCacheLoaderMock::setCollectionRefreshReturnValue(
+    StatusWith<CollectionType> statusWithCollectionType) {
+    _swCollectionReturnValue = std::move(statusWithCollectionType);
+}
+
+void CatalogCacheLoaderMock::setChunkRefreshReturnValue(
+    StatusWith<std::vector<ChunkType>> statusWithChunks) {
+    _swChunksReturnValue = std::move(statusWithChunks);
+}
+
+}  // namespace mongo