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// s_only.cpp
/* Copyright 2009 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.
*/
#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kSharding
#include "mongo/platform/basic.h"
#include <tuple>
#include "mongo/db/auth/authorization_manager.h"
#include "mongo/db/auth/authorization_manager_global.h"
#include "mongo/db/auth/authorization_session.h"
#include "mongo/db/client.h"
#include "mongo/db/commands.h"
#include "mongo/db/service_context.h"
#include "mongo/db/stats/counters.h"
#include "mongo/rpc/metadata.h"
#include "mongo/rpc/reply_builder_interface.h"
#include "mongo/rpc/request_interface.h"
#include "mongo/s/cluster_last_error_info.h"
#include "mongo/util/assert_util.h"
#include "mongo/util/concurrency/thread_name.h"
#include "mongo/util/log.h"
namespace mongo {
using std::string;
using std::stringstream;
bool isMongos() {
return true;
}
/** When this callback is run, we record a shard that we've used for useful work
* in an operation to be read later by getLastError()
*/
void usingAShardConnection(const std::string& addr) {
ClusterLastErrorInfo::get(cc()).addShardHost(addr);
}
// called into by the web server. For now we just translate the parameters
// to their old style equivalents.
void Command::execCommand(OperationContext* txn,
Command* command,
const rpc::RequestInterface& request,
rpc::ReplyBuilderInterface* replyBuilder) {
int queryFlags = 0;
BSONObj cmdObj;
std::tie(cmdObj, queryFlags) = uassertStatusOK(
rpc::downconvertRequestMetadata(request.getCommandArgs(), request.getMetadata()));
std::string db = request.getDatabase().rawData();
BSONObjBuilder result;
execCommandClientBasic(txn,
command,
*txn->getClient(),
queryFlags,
request.getDatabase().rawData(),
cmdObj,
result);
replyBuilder->setCommandReply(result.done()).setMetadata(rpc::makeEmptyMetadata());
}
void Command::execCommandClientBasic(OperationContext* txn,
Command* c,
ClientBasic& client,
int queryOptions,
const char* ns,
BSONObj& cmdObj,
BSONObjBuilder& result) {
std::string dbname = nsToDatabase(ns);
if (cmdObj.getBoolField("help")) {
stringstream help;
help << "help for: " << c->name << " ";
c->help(help);
result.append("help", help.str());
appendCommandStatus(result, true, "");
return;
}
Status status = _checkAuthorization(c, &client, dbname, cmdObj);
if (!status.isOK()) {
appendCommandStatus(result, status);
return;
}
c->_commandsExecuted.increment();
if (c->shouldAffectCommandCounter()) {
globalOpCounters.gotCommand();
}
std::string errmsg;
bool ok = false;
try {
ok = c->run(txn, dbname, cmdObj, queryOptions, errmsg, result);
} catch (const DBException& e) {
result.resetToEmpty();
const int code = e.getCode();
// Codes for StaleConfigException
if (code == ErrorCodes::RecvStaleConfig || code == ErrorCodes::SendStaleConfig) {
throw;
}
errmsg = e.what();
result.append("code", code);
}
if (!ok) {
c->_commandsFailed.increment();
}
appendCommandStatus(result, ok, errmsg);
}
void Command::runAgainstRegistered(OperationContext* txn,
const char* ns,
BSONObj& jsobj,
BSONObjBuilder& anObjBuilder,
int queryOptions) {
// It should be impossible for this uassert to fail since there should be no way to get
// into this function with any other collection name.
uassert(16618,
"Illegal attempt to run a command against a namespace other than $cmd.",
nsToCollectionSubstring(ns) == "$cmd");
BSONElement e = jsobj.firstElement();
std::string commandName = e.fieldName();
Command* c = e.type() ? Command::findCommand(commandName) : NULL;
if (!c) {
Command::appendCommandStatus(
anObjBuilder, false, str::stream() << "no such cmd: " << commandName);
anObjBuilder.append("code", ErrorCodes::CommandNotFound);
Command::unknownCommands.increment();
return;
}
execCommandClientBasic(txn, c, cc(), queryOptions, ns, jsobj, anObjBuilder);
}
void Command::registerError(OperationContext* txn, const DBException& exception) {}
} // namespace mongo
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