1 files changed, 78 insertions, 0 deletions
diff --git a/src/mongo/db/s/config_server_op_observer.cpp b/src/mongo/db/s/config_server_op_observer.cpp
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+++ b/src/mongo/db/s/config_server_op_observer.cpp
@@ -0,0 +1,78 @@
+/**
+ *    Copyright (C) 2018 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.
+ */
+
+#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kSharding
+
+#include "mongo/platform/basic.h"
+
+#include "mongo/db/s/config_server_op_observer.h"
+
+#include "mongo/db/s/config/sharding_catalog_manager.h"
+#include "mongo/s/catalog/type_config_version.h"
+#include "mongo/s/cluster_identity_loader.h"
+
+namespace mongo {
+
+ConfigServerOpObserver::ConfigServerOpObserver() = default;
+
+ConfigServerOpObserver::~ConfigServerOpObserver() = default;
+
+void ConfigServerOpObserver::onDelete(OperationContext* opCtx,
+                                      const NamespaceString& nss,
+                                      OptionalCollectionUUID uuid,
+                                      StmtId stmtId,
+                                      bool fromMigrate,
+                                      const boost::optional<BSONObj>& deletedDoc) {
+    if (nss == VersionType::ConfigNS) {
+        if (!repl::ReplicationCoordinator::get(opCtx)->getMemberState().rollback()) {
+            uasserted(40302, "cannot delete config.version document while in --configsvr mode");
+        } else {
+            // Throw out any cached information related to the cluster ID.
+            ShardingCatalogManager::get(opCtx)->discardCachedConfigDatabaseInitializationState();
+            ClusterIdentityLoader::get(opCtx)->discardCachedClusterId();
+        }
+    }
+}
+
+repl::OpTime ConfigServerOpObserver::onDropCollection(OperationContext* opCtx,
+                                                      const NamespaceString& collectionName,
+                                                      OptionalCollectionUUID uuid) {
+    if (collectionName == VersionType::ConfigNS) {
+        if (!repl::ReplicationCoordinator::get(opCtx)->getMemberState().rollback()) {
+            uasserted(40303, "cannot drop config.version document while in --configsvr mode");
+        } else {
+            // Throw out any cached information related to the cluster ID.
+            ShardingCatalogManager::get(opCtx)->discardCachedConfigDatabaseInitializationState();
+            ClusterIdentityLoader::get(opCtx)->discardCachedClusterId();
+        }
+    }
+
+    return {};
+}
+
+}  // namespace mongo