1 files changed, 82 insertions, 0 deletions
diff --git a/src/mongo/db/write_concern.h b/src/mongo/db/write_concern.h
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+++ b/src/mongo/db/write_concern.h
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+/**
+ *    Copyright (C) 2013 10gen 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
+
+#include "mongo/db/write_concern_options.h"
+
+namespace mongo {
+
+    /**
+     * Verifies that a WriteConcern is valid for this particular host.
+     */
+    Status validateWriteConcern( const WriteConcernOptions& writeConcern );
+
+    struct WriteConcernResult {
+        WriteConcernResult() {
+            reset();
+        }
+
+        void reset() {
+            syncMillis = -1;
+            fsyncFiles = -1;
+            wTimedOut = false;
+            wTime = -1;
+            err = "";
+        }
+
+        void appendTo( const WriteConcernOptions& writeConcern, BSONObjBuilder* result ) const;
+
+        int syncMillis;
+        int fsyncFiles;
+
+        bool wTimedOut;
+        int wTime;
+        vector<BSONObj> writtenTo;
+
+        string err; // this is the old err field, should deprecate
+    };
+
+    /**
+     * Blocks until the database is sure the specified user write concern has been fulfilled, or
+     * returns an error status if the write concern fails.  Does no validation of the input write
+     * concern, it is an error to pass this function an invalid write concern for the host.
+     *
+     * Takes a user write concern as well as the replication opTime the write concern applies to -
+     * if this opTime.isNull() no replication-related write concern options will be enforced.
+     *
+     * Returns result of the write concern if successful.
+     * Returns NotMaster if the host steps down while waiting for replication
+     * Returns UnknownReplWriteConcern if the wMode specified was not enforceable
+     */
+    Status waitForWriteConcern( const WriteConcernOptions& writeConcern,
+                                const OpTime& replOpTime,
+                                WriteConcernResult* result );
+
+
+} // namespace mongo