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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.
*/
#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kSharding
#include <boost/none_t.hpp>
#include "mongo/platform/basic.h"
#include "mongo/s/client/shard_local.h"
#include "mongo/base/status.h"
#include "mongo/base/status_with.h"
#include "mongo/client/remote_command_targeter.h"
#include "mongo/db/curop.h"
#include "mongo/db/dbdirectclient.h"
#include "mongo/db/repl/repl_client_info.h"
#include "mongo/db/repl/repl_set_config.h"
#include "mongo/db/repl/replication_coordinator.h"
#include "mongo/rpc/get_status_from_command_result.h"
#include "mongo/rpc/unique_message.h"
#include "mongo/util/log.h"
#include "mongo/util/scopeguard.h"
namespace mongo {
ShardLocal::ShardLocal(const ShardId& id) : Shard(id), _rsLocalClient() {
// Currently ShardLocal only works for config servers. If we ever start using ShardLocal on
// shards we'll need to consider how to handle shards.
invariant(serverGlobalParams.clusterRole == ClusterRole::ConfigServer);
}
const ConnectionString ShardLocal::getConnString() const {
return repl::ReplicationCoordinator::get(getGlobalServiceContext())
->getConfig()
.getConnectionString();
}
std::shared_ptr<RemoteCommandTargeter> ShardLocal::getTargeter() const {
MONGO_UNREACHABLE;
};
const ConnectionString ShardLocal::originalConnString() const {
// Return the local connection string here as this method is only used for updating the
// ShardRegistry and we don't need a mapping from hosts in the replica set config to the shard
// for local shards.
return ConnectionString::forLocal();
}
void ShardLocal::updateReplSetMonitor(const HostAndPort& remoteHost,
const Status& remoteCommandStatus) {
MONGO_UNREACHABLE;
}
void ShardLocal::updateLastCommittedOpTime(LogicalTime lastCommittedOpTime) {
MONGO_UNREACHABLE;
}
LogicalTime ShardLocal::getLastCommittedOpTime() const {
MONGO_UNREACHABLE;
}
std::string ShardLocal::toString() const {
return getId().toString() + ":<local>";
}
bool ShardLocal::isRetriableError(ErrorCodes::Error code, RetryPolicy options) {
if (options == RetryPolicy::kNoRetry) {
return false;
}
if (options == RetryPolicy::kIdempotent) {
return code == ErrorCodes::WriteConcernFailed;
} else {
invariant(options == RetryPolicy::kNotIdempotent);
return false;
}
}
StatusWith<Shard::CommandResponse> ShardLocal::_runCommand(OperationContext* opCtx,
const ReadPreferenceSetting& unused,
const std::string& dbName,
Milliseconds maxTimeMSOverrideUnused,
const BSONObj& cmdObj) {
return _rsLocalClient.runCommandOnce(opCtx, dbName, cmdObj);
}
StatusWith<Shard::QueryResponse> ShardLocal::_exhaustiveFindOnConfig(
OperationContext* opCtx,
const ReadPreferenceSetting& readPref,
const repl::ReadConcernLevel& readConcernLevel,
const NamespaceString& nss,
const BSONObj& query,
const BSONObj& sort,
boost::optional<long long> limit) {
return _rsLocalClient.queryOnce(opCtx, readPref, readConcernLevel, nss, query, sort, limit);
}
Status ShardLocal::createIndexOnConfig(OperationContext* opCtx,
const NamespaceString& ns,
const BSONObj& keys,
bool unique) {
invariant(ns.db() == "config" || ns.db() == "admin");
try {
DBDirectClient client(opCtx);
IndexSpec index;
index.addKeys(keys);
index.unique(unique);
client.createIndex(ns.toString(), index);
} catch (const DBException& e) {
return e.toStatus();
}
return Status::OK();
}
} // namespace mongo
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