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/**
* Copyright (C) 2008 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/>.
*/
#include <sstream>
#include <string>
#include <vector>
#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/auth/privilege.h"
#include "mongo/db/jsobj.h"
#include "mongo/db/commands.h"
#include "mongo/db/instance.h"
#include "mongo/db/matcher.h"
#include "mongo/db/repl/oplog.h"
namespace mongo {
class ApplyOpsCmd : public Command {
public:
virtual bool slaveOk() const { return false; }
virtual LockType locktype() const { return WRITE; }
virtual bool lockGlobally() const { return true; } // SERVER-4328 todo : is global ok or does this take a long time? i believe multiple ns used so locking individually requires more analysis
ApplyOpsCmd() : Command( "applyOps" ) {}
virtual void help( stringstream &help ) const {
help << "internal (sharding)\n{ applyOps : [ ] , preCondition : [ { ns : ... , q : ... , res : ... } ] }";
}
virtual void addRequiredPrivileges(const std::string& dbname,
const BSONObj& cmdObj,
std::vector<Privilege>* out) {
// applyOps can do pretty much anything, so require all privileges.
out->push_back(Privilege(AuthorizationManager::WILDCARD_RESOURCE_NAME,
getGlobalAuthorizationManager()->getAllUserActions()));
}
virtual bool run(const string& dbname, BSONObj& cmdObj, int, string& errmsg, BSONObjBuilder& result, bool fromRepl) {
if ( cmdObj.firstElement().type() != Array ) {
errmsg = "ops has to be an array";
return false;
}
BSONObj ops = cmdObj.firstElement().Obj();
{
// check input
BSONObjIterator i( ops );
while ( i.more() ) {
BSONElement e = i.next();
if ( e.type() == Object )
continue;
errmsg = "op not an object: ";
errmsg += e.fieldName();
return false;
}
}
if ( cmdObj["preCondition"].type() == Array ) {
BSONObjIterator i( cmdObj["preCondition"].Obj() );
while ( i.more() ) {
BSONObj f = i.next().Obj();
BSONObj realres = db.findOne( f["ns"].String() , f["q"].Obj() );
Matcher m( f["res"].Obj() );
if ( ! m.matches( realres ) ) {
result.append( "got" , realres );
result.append( "whatFailed" , f );
errmsg = "pre-condition failed";
return false;
}
}
}
// apply
int num = 0;
int errors = 0;
BSONObjIterator i( ops );
BSONArrayBuilder ab;
const bool alwaysUpsert = cmdObj.hasField("alwaysUpsert") ?
cmdObj["alwaysUpsert"].trueValue() : true;
while ( i.more() ) {
BSONElement e = i.next();
const BSONObj& temp = e.Obj();
Client::Context ctx(temp["ns"].String());
bool failed = applyOperation_inlock(temp, false, alwaysUpsert);
ab.append(!failed);
if ( failed )
errors++;
num++;
}
result.append( "applied" , num );
result.append( "results" , ab.arr() );
if ( ! fromRepl ) {
// We want this applied atomically on slaves
// so we re-wrap without the pre-condition for speed
string tempNS = str::stream() << dbname << ".$cmd";
// TODO: possibly use mutable BSON to remove preCondition field
// once it is available
BSONObjIterator iter(cmdObj);
BSONObjBuilder cmdBuilder;
while (iter.more()) {
BSONElement elem(iter.next());
if (strcmp(elem.fieldName(), "preCondition") != 0) {
cmdBuilder.append(elem);
}
}
logOp("c", tempNS.c_str(), cmdBuilder.done());
}
return errors == 0;
}
DBDirectClient db;
} applyOpsCmd;
}
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