SERVER-22611 Sharding catalog cache refactor

1 files changed, 0 insertions, 146 deletions

diff --git a/src/mongo/s/config.h b/src/mongo/s/config.h
deleted file mode 100644
index bbd63cf3b3b..00000000000
--- a/src/mongo/s/config.h
+++ /dev/null
@@ -1,146 +0,0 @@
-/**
- *    Copyright (C) 2008-2015 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
-
-#include <string>
-
-#include "mongo/db/repl/optime.h"
-#include "mongo/platform/atomic_word.h"
-#include "mongo/s/shard_id.h"
-#include "mongo/stdx/mutex.h"
-
-namespace mongo {
-
-class ChunkManager;
-struct CollectionInfo;
-class DatabaseType;
-class OperationContext;
-
-/**
- * Represents the cache entry for a database.
- */
-class DBConfig {
-public:
-    DBConfig(const DatabaseType& dbt, repl::OpTime configOpTime);
-    ~DBConfig();
-
-    /**
-     * The name of the database which this entry caches.
-     */
-    const std::string& name() const {
-        return _name;
-    }
-
-    ShardId getPrimaryId();
-
-    /**
-     * Returns whether 'enableSharding' has been called for this database.
-     */
-    bool isShardingEnabled() const {
-        return _shardingEnabled;
-    }
-
-    /**
-     * Removes the specified namespace from the set of collections under this database entry so that
-     * from then onwards it will be treated as unsharded.
-     *
-     * Note that this method doesn't do any writes to the config metadata, but simply drops the
-     * specified namespace from the cache.
-     */
-    void markNSNotSharded(const std::string& ns);
-
-    /**
-     * @return whether or not the 'ns' collection is partitioned
-     */
-    bool isSharded(const std::string& ns);
-
-    std::shared_ptr<ChunkManager> getChunkManager(OperationContext* opCtx,
-                                                  const std::string& ns,
-                                                  bool reload = false,
-                                                  bool forceReload = false);
-    std::shared_ptr<ChunkManager> getChunkManagerIfExists(OperationContext* opCtx,
-                                                          const std::string& ns,
-                                                          bool reload = false,
-                                                          bool forceReload = false);
-
-    /**
-     * Returns true if it is successful at loading the DBConfig, false if the database is not found,
-     * and throws on all other errors.
-     */
-    bool load(OperationContext* opCtx);
-
-protected:
-    typedef std::map<std::string, CollectionInfo> CollectionInfoMap;
-    typedef AtomicUInt64::WordType Counter;
-
-    /**
-     * Returns true if it is successful at loading the DBConfig, false if the database is not found,
-     * and throws on all other errors.
-     * Also returns true without reloading if reloadIteration is not equal to the _reloadCount.
-     * This is to avoid multiple threads attempting to reload do duplicate work.
-     */
-    bool _loadIfNeeded(OperationContext* opCtx, Counter reloadIteration);
-
-    // All member variables are labeled with one of the following codes indicating the
-    // synchronization rules for accessing them.
-    //
-    // (L) Must hold _lock for access.
-    // (S) Self synchronizing, no explicit locking needed.
-    //
-    // Mutex lock order:
-    // _hitConfigServerLock -> _lock
-    //
-
-    // Name of the database which this entry caches
-    const std::string _name;
-
-    // Whether sharding is enabled for this database
-    const bool _shardingEnabled;
-
-    // Primary shard id
-    ShardId _primaryId;  // (L)
-
-    // Set of collections and lock to protect access
-    stdx::mutex _lock;
-    CollectionInfoMap _collections;  // (L)
-
-    // OpTime of config server when the database definition was loaded.
-    repl::OpTime _configOpTime;  // (L)
-
-    // Ensures that only one thread at a time loads collection configuration data from
-    // the config server
-    stdx::mutex _hitConfigServerLock;
-
-    // Increments every time this performs a full reload. Since a full reload can take a very
-    // long time for very large clusters, this can be used to minimize duplicate work when multiple
-    // threads tries to perform full rerload at roughly the same time.
-    AtomicUInt64 _reloadCount;  // (S)
-};
-
-}  // namespace mongo