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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.
*/
#include "mongo/platform/basic.h"
#include "mongo/s/sharding_raii.h"
#include "mongo/base/status_with.h"
#include "mongo/s/catalog/catalog_cache.h"
#include "mongo/s/catalog/sharding_catalog_client.h"
#include "mongo/s/chunk_manager.h"
#include "mongo/s/grid.h"
namespace mongo {
using std::shared_ptr;
ScopedShardDatabase::ScopedShardDatabase(std::shared_ptr<DBConfig> db) : _db(db) {
invariant(_db);
}
ScopedShardDatabase::~ScopedShardDatabase() = default;
StatusWith<ScopedShardDatabase> ScopedShardDatabase::getExisting(OperationContext* txn,
StringData dbName) {
auto dbStatus = Grid::get(txn)->catalogCache()->getDatabase(txn, dbName.toString());
if (!dbStatus.isOK()) {
return {dbStatus.getStatus().code(),
str::stream() << "Database " << dbName << " was not found due to "
<< dbStatus.getStatus().toString()};
}
return {ScopedShardDatabase(std::move(dbStatus.getValue()))};
}
StatusWith<ScopedShardDatabase> ScopedShardDatabase::getOrCreate(OperationContext* txn,
StringData dbName) {
auto dbStatus = getExisting(txn, dbName);
if (dbStatus.isOK()) {
return dbStatus;
}
if (dbStatus == ErrorCodes::NamespaceNotFound) {
auto statusCreateDb =
Grid::get(txn)->catalogClient(txn)->createDatabase(txn, dbName.toString());
if (statusCreateDb.isOK() || statusCreateDb == ErrorCodes::NamespaceExists) {
return getExisting(txn, dbName);
}
return statusCreateDb;
}
return dbStatus.getStatus();
}
ScopedChunkManager::ScopedChunkManager(ScopedShardDatabase db, std::shared_ptr<ChunkManager> cm)
: _db(std::move(db)), _cm(std::move(cm)) {}
ScopedChunkManager::~ScopedChunkManager() = default;
StatusWith<ScopedChunkManager> ScopedChunkManager::refreshAndGet(OperationContext* txn,
const NamespaceString& nss) {
auto scopedDbStatus = ScopedShardDatabase::getExisting(txn, nss.db());
if (!scopedDbStatus.isOK()) {
return scopedDbStatus.getStatus();
}
auto scopedDb = std::move(scopedDbStatus.getValue());
try {
std::shared_ptr<ChunkManager> cm =
scopedDb.db()->getChunkManager(txn, nss.ns(), true, false);
if (!cm) {
return {ErrorCodes::NamespaceNotSharded,
str::stream() << "Collection " << nss.ns()
<< " does not exist or is not sharded."};
}
if (cm->getChunkMap().empty()) {
return {ErrorCodes::NamespaceNotSharded,
str::stream() << "Collection " << nss.ns()
<< " is marked as sharded, but does not have any chunks. This "
"most likely indicates a corrupted metadata or "
"partially completed 'shardCollection' command."};
}
return {ScopedChunkManager(std::move(scopedDb), std::move(cm))};
} catch (const AssertionException& e) {
return e.toStatus();
}
}
} // namespace mongo
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