SERVER-43713 SERVER-43715 Create DistCache abstraction, use it in ReadWriteConcernDefaults

4 files changed, 85 insertions, 0 deletions

diff --git a/src/mongo/embedded/SConscript b/src/mongo/embedded/SConscript
index 09da019b4a8..49baf7939e9 100644
--- a/src/mongo/embedded/SConscript
+++ b/src/mongo/embedded/SConscript
@@ -75,6 +75,7 @@ env.Library(
         'periodic_runner_embedded.cpp',
         'process_interface_factory_embedded.cpp',
         'read_concern_embedded.cpp',
+        'read_write_concern_defaults_cache_lookup_embedded.cpp',
         'replication_coordinator_embedded.cpp',
         'service_entry_point_embedded.cpp',
         'transaction_coordinator_factory_embedded.cpp',
diff --git a/src/mongo/embedded/embedded.cpp b/src/mongo/embedded/embedded.cpp
index 14df124c6c6..69911b0fa21 100644
--- a/src/mongo/embedded/embedded.cpp
+++ b/src/mongo/embedded/embedded.cpp
@@ -62,6 +62,7 @@
 #include "mongo/db/ttl.h"
 #include "mongo/embedded/index_builds_coordinator_embedded.h"
 #include "mongo/embedded/periodic_runner_embedded.h"
+#include "mongo/embedded/read_write_concern_defaults_cache_lookup_embedded.h"
 #include "mongo/embedded/replication_coordinator_embedded.h"
 #include "mongo/embedded/service_entry_point_embedded.h"
 #include "mongo/logger/log_component.h"
@@ -270,6 +271,8 @@ ServiceContext* initialize(const char* yaml_config) {
         boost::filesystem::remove_all(storageGlobalParams.dbpath + "/_tmp/");
     }
 
+    ReadWriteConcernDefaults::create(serviceContext, readWriteConcernDefaultsCacheLookupEmbedded);
+
     auto startupOpCtx = serviceContext->makeOperationContext(&cc());
 
     bool canCallFCVSetIfCleanStartup =
diff --git a/src/mongo/embedded/read_write_concern_defaults_cache_lookup_embedded.cpp b/src/mongo/embedded/read_write_concern_defaults_cache_lookup_embedded.cpp
new file mode 100644
index 00000000000..316056e684b
--- /dev/null
+++ b/src/mongo/embedded/read_write_concern_defaults_cache_lookup_embedded.cpp
@@ -0,0 +1,39 @@
+/**
+ *    Copyright (C) 2019-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/embedded/read_write_concern_defaults_cache_lookup_embedded.h"
+
+namespace mongo {
+
+boost::optional<RWConcernDefault> readWriteConcernDefaultsCacheLookupEmbedded(
+    OperationContext* opCtx) {
+    return boost::none;
+}
+
+}  // namespace mongo
diff --git a/src/mongo/embedded/read_write_concern_defaults_cache_lookup_embedded.h b/src/mongo/embedded/read_write_concern_defaults_cache_lookup_embedded.h
new file mode 100644
index 00000000000..d9fb9e2dbca
--- /dev/null
+++ b/src/mongo/embedded/read_write_concern_defaults_cache_lookup_embedded.h
@@ -0,0 +1,42 @@
+/**
+ *    Copyright (C) 2019-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/db/read_write_concern_defaults.h"
+
+namespace mongo {
+
+/**
+ * A function which handles looking up RWConcernDefault values on embedded.
+ */
+boost::optional<RWConcernDefault> readWriteConcernDefaultsCacheLookupEmbedded(
+    OperationContext* opCtx);
+
+}  // namespace mongo