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/* commands.cpp
db "commands" (sent via db.$cmd.findOne(...))
*/
/**
*
* 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 "stdafx.h"
#include "query.h"
#include "pdfile.h"
#include "jsobj.h"
#include "../util/builder.h"
#include <time.h>
#include "introspect.h"
#include "btree.h"
#include "../util/lruishmap.h"
#include "json.h"
#include "repl.h"
#include "commands.h"
#include "../scripting/engine.h"
namespace mongo {
const int edebug=0;
bool dbEval(const char *ns, BSONObj& cmd, BSONObjBuilder& result, string& errmsg) {
BSONElement e = cmd.firstElement();
assert( e.type() == Code || e.type() == CodeWScope || e.type() == String );
const char *code = 0;
switch ( e.type() ) {
case String:
case Code:
code = e.valuestr();
break;
case CodeWScope:
code = e.codeWScopeCode();
break;
default:
assert(0);
}
assert( code );
if ( ! globalScriptEngine ) {
errmsg = "db side execution is disabled";
return false;
}
auto_ptr<Scope> s( globalScriptEngine->createScope() );
ScriptingFunction f = s->createFunction(code);
if ( f == 0 ) {
errmsg = (string)"compile failed: " + s->getError();
return false;
}
if ( e.type() == CodeWScope )
s->init( e.codeWScopeScopeData() );
s->localConnect( database->name.c_str() );
BSONObj args;
{
BSONElement argsElement = cmd.findElement("args");
if ( argsElement.type() == Array ) {
args = argsElement.embeddedObject();
if ( edebug ) {
out() << "args:" << args.toString() << endl;
out() << "code:\n" << code << endl;
}
}
}
int res;
{
Timer t;
res = s->invoke(f,args, 10 * 60 * 1000);
int m = t.millis();
if ( m > 100 ) {
out() << "dbeval slow, time: " << dec << m << "ms " << ns << endl;
if ( m >= 1000 ) log() << code << endl;
else OCCASIONALLY log() << code << endl;
}
}
if ( res ) {
result.append("errno", (double) res);
errmsg = "invoke failed: ";
errmsg += s->getError();
return false;
}
int type = s->type("return");
if ( type == Object )
result.append("retval", s->getObject("return"));
else if ( type == Array )
result.appendArray("retval", s->getObject("return"));
else if ( type == NumberDouble )
result.append("retval", s->getNumber("return"));
else if ( type == String )
result.append("retval", s->getString("return").c_str());
else if ( type == Bool )
result.appendBool("retval", s->getBoolean("return"));
else if ( type == jstNULL || type == Undefined )
result.appendNull("retval");
else {
stringstream temp;
temp << "can't handle return type from db.eval:";
temp << type;
uassert( temp.str() , 0 );
}
return true;
}
class CmdEval : public Command {
public:
virtual bool slaveOk() {
return false;
}
CmdEval() : Command("$eval") { }
bool run(const char *ns, BSONObj& cmdObj, string& errmsg, BSONObjBuilder& result, bool fromRepl) {
return dbEval(ns, cmdObj, result, errmsg);
}
} cmdeval;
} // namespace mongo
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