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authorKaloian Manassiev <kaloian.manassiev@mongodb.com>2016-07-06 13:54:16 -0400
committerKaloian Manassiev <kaloian.manassiev@mongodb.com>2016-07-08 17:18:46 -0400
commit71c38ae1c608e1fa4abd9c8d8642508b87d333e5 (patch)
tree4462e263bcec66cc2fb898402b29c875f8449e05 /src/mongo/db/read_concern.h
parent8aa68afc0ec5043d13c2d0a131974c0ac6da7e6d (diff)
downloadmongo-71c38ae1c608e1fa4abd9c8d8642508b87d333e5.tar.gz
SERVER-24939 Pull read concern extract, check and wait to separate utility
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+/**
+ * Copyright (C) 2016 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.
+ */
+
+#pragma once
+
+namespace mongo {
+
+class BSONObj;
+class OperationContext;
+class Status;
+template <typename T>
+class StatusWith;
+
+namespace repl {
+class ReadConcernArgs;
+}
+
+/**
+ * Given the specified command and whether it supports read concern, returns an effective read
+ * concern which should be used.
+ */
+StatusWith<repl::ReadConcernArgs> extractReadConcern(OperationContext* txn,
+ const BSONObj& cmdObj,
+ bool supportsReadConcern);
+
+/**
+ * Given the specified read concern arguments, performs checks that the read concern can actually be
+ * satisfied given the current state of the server and if so calls into the replication subsystem to
+ * perform the wait.
+ */
+Status waitForReadConcern(OperationContext* txn, const repl::ReadConcernArgs& readConcernArgs);
+
+} // namespace mongo