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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.
*/
#include "mongo/db/commands/write_commands/write_commands.h"
#include "mongo/base/init.h"
#include "mongo/bson/mutable/document.h"
#include "mongo/bson/mutable/element.h"
#include "mongo/db/commands/write_commands/batch_executor.h"
#include "mongo/db/commands/write_commands/write_commands_common.h"
#include "mongo/db/curop.h"
#include "mongo/db/json.h"
#include "mongo/db/lasterror.h"
#include "mongo/db/server_parameters.h"
#include "mongo/db/stats/counters.h"
namespace mongo {
namespace {
MONGO_INITIALIZER(RegisterWriteCommands)(InitializerContext* context) {
// Leaked intentionally: a Command registers itself when constructed.
new CmdInsert();
new CmdUpdate();
new CmdDelete();
return Status::OK();
}
} // namespace
// This is set in rs.cpp when the replica set is initialized, and is stored in dbcommands.cpp
// for now. See dbcommands.cpp
extern BSONObj* getLastErrorDefault;
WriteCmd::WriteCmd( const StringData& name, BatchedCommandRequest::BatchType writeType ) :
Command( name ), _writeType( writeType ) {
}
void WriteCmd::redactTooLongLog( mutablebson::Document* cmdObj, const StringData& fieldName ) {
namespace mmb = mutablebson;
mmb::Element root = cmdObj->root();
mmb::Element field = root.findFirstChildNamed( fieldName );
// If the cmdObj is too large, it will be a "too big" message given by CachedBSONObj.get()
if ( !field.ok() ) {
return;
}
// Redact the log if there are more than one documents or operations.
if ( field.countChildren() > 1 ) {
field.setValueInt( field.countChildren() );
}
}
// Slaves can't perform writes.
bool WriteCmd::slaveOk() const { return false; }
bool WriteCmd::isWriteCommandForConfigServer() const { return false; }
Status WriteCmd::checkAuthForCommand( ClientBasic* client,
const std::string& dbname,
const BSONObj& cmdObj ) {
Status status( auth::checkAuthForWriteCommand( client->getAuthorizationSession(),
_writeType,
NamespaceString( parseNs( dbname, cmdObj ) ),
cmdObj ));
// TODO: Remove this when we standardize GLE reporting from commands
if ( !status.isOK() ) {
setLastError( status.code(), status.reason().c_str() );
}
return status;
}
// Write commands are counted towards their corresponding opcounters, not command opcounters.
bool WriteCmd::shouldAffectCommandCounter() const { return false; }
bool WriteCmd::run(TransactionExperiment* txn,
const string& dbName,
BSONObj& cmdObj,
int options,
string& errMsg,
BSONObjBuilder& result,
bool fromRepl) {
// Can't be run on secondaries (logTheOp() == false, slaveOk() == false).
dassert( !fromRepl );
BatchedCommandRequest request( _writeType );
BatchedCommandResponse response;
if ( !request.parseBSON( cmdObj, &errMsg ) || !request.isValid( &errMsg ) ) {
return appendCommandStatus( result, Status( ErrorCodes::FailedToParse, errMsg ) );
}
// Note that this is a runCommmand, and therefore, the database and the collection name
// are in different parts of the grammar for the command. But it's more convenient to
// work with a NamespaceString. We built it here and replace it in the parsed command.
// Internally, everything work with the namespace string as opposed to just the
// collection name.
NamespaceString nss(dbName, request.getNS());
request.setNS(nss.ns());
BSONObj defaultWriteConcern;
// This is really bad - it's only safe because we leak the defaults by overriding them with
// new defaults and because we never reset to an empty default.
// TODO: fix this for sane behavior where we query repl set object
if ( getLastErrorDefault ) defaultWriteConcern = *getLastErrorDefault;
WriteBatchExecutor writeBatchExecutor(txn,
defaultWriteConcern,
&cc(),
&globalOpCounters,
lastError.get());
writeBatchExecutor.executeBatch( request, &response );
result.appendElements( response.toBSON() );
return response.getOk();
}
CmdInsert::CmdInsert() :
WriteCmd( "insert", BatchedCommandRequest::BatchType_Insert ) {
}
void CmdInsert::redactForLogging( mutablebson::Document* cmdObj ) {
redactTooLongLog( cmdObj, StringData( "documents", StringData::LiteralTag() ) );
}
void CmdInsert::help( stringstream& help ) const {
help << "insert documents";
}
CmdUpdate::CmdUpdate() :
WriteCmd( "update", BatchedCommandRequest::BatchType_Update ) {
}
void CmdUpdate::redactForLogging( mutablebson::Document* cmdObj ) {
redactTooLongLog( cmdObj, StringData( "updates", StringData::LiteralTag() ) );
}
void CmdUpdate::help( stringstream& help ) const {
help << "update documents";
}
CmdDelete::CmdDelete() :
WriteCmd( "delete", BatchedCommandRequest::BatchType_Delete ) {
}
void CmdDelete::redactForLogging( mutablebson::Document* cmdObj ) {
redactTooLongLog( cmdObj, StringData( "deletes", StringData::LiteralTag() ) );
}
void CmdDelete::help( stringstream& help ) const {
help << "delete documents";
}
} // namespace mongo
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