bool dbEval(const char *ns, BSONObj& cmd, BSONObjBuilder& result, string& errmsg) {
BSONElement e = cmd.firstElement();
uassert( "eval needs Code" , 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->getPooledScope( ns );
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;
}
s->append( result , "retval" , "return" );
return true;
}
bool Cloner::go(const char *masterHost, string& errmsg, const string& fromdb, bool logForRepl, bool slaveOk, bool useReplAuth, bool snapshot) {
massert( "useReplAuth is not written to replication log", !useReplAuth || !logForRepl );
string todb = cc().database()->name;
stringstream a,b;
a << "localhost:" << cmdLine.port;
b << "127.0.0.1:" << cmdLine.port;
bool masterSameProcess = ( a.str() == masterHost || b.str() == masterHost );
if ( masterSameProcess ) {
if ( fromdb == todb && cc().database()->path == dbpath ) {
// guard against an "infinite" loop
/* if you are replicating, the local.sources config may be wrong if you get this */
errmsg = "can't clone from self (localhost).";
return false;
}
}
/* todo: we can put these releases inside dbclient or a dbclient specialization.
or just wait until we get rid of global lock anyway.
*/
string ns = fromdb + ".system.namespaces";
list<BSONObj> toClone;
{
dbtemprelease r;
auto_ptr<DBClientCursor> c;
{
if ( !masterSameProcess ) {
auto_ptr< DBClientConnection > c( new DBClientConnection() );
if ( !c->connect( masterHost, errmsg ) )
return false;
if( !replAuthenticate(c.get()) )
return false;
conn = c;
} else {
conn.reset( new DBDirectClient() );
}
c = conn->query( ns.c_str(), BSONObj(), 0, 0, 0, slaveOk ? Option_SlaveOk : 0 );
}
if ( c.get() == 0 ) {
errmsg = "query failed " + ns;
return false;
}
while ( c->more() ){
BSONObj collection = c->next();
log(2) << "\t cloner got " << collection << endl;
BSONElement e = collection.findElement("name");
if ( e.eoo() ) {
string s = "bad system.namespaces object " + collection.toString();
massert(s.c_str(), false);
}
assert( !e.eoo() );
assert( e.type() == String );
const char *from_name = e.valuestr();
if( strstr(from_name, ".system.") ) {
/* system.users is cloned -- but nothing else from system. */
if( legalClientSystemNS( from_name , true ) == 0 ){
log(2) << "\t\t not cloning because system collection" << endl;
continue;
}
}
else if( strchr(from_name, '$') ) {
// don't clone index namespaces -- we take care of those separately below.
log(2) << "\t\t not cloning because has $ " << endl;
continue;
}
toClone.push_back( collection.getOwned() );
}
}
for ( list<BSONObj>::iterator i=toClone.begin(); i != toClone.end(); i++ ){
{
dbtemprelease r;
}
BSONObj collection = *i;
log(2) << " really will clone: " << collection << endl;
const char * from_name = collection["name"].valuestr();
BSONObj options = collection.getObjectField("options");
/* change name "<fromdb>.collection" -> <todb>.collection */
const char *p = strchr(from_name, '.');
assert(p);
string to_name = todb + p;
{
string err;
const char *toname = to_name.c_str();
userCreateNS(toname, options, err, logForRepl);
}
log(1) << "\t\t cloning " << from_name << " -> " << to_name << endl;
Query q;
if( snapshot )
q.snapshot();
copy(from_name, to_name.c_str(), false, logForRepl, masterSameProcess, slaveOk, q);
}
// now build the indexes
string system_indexes_from = fromdb + ".system.indexes";
string system_indexes_to = todb + ".system.indexes";
/* [dm]: is the ID index sometimes not called "_id_"? There is other code in the system that looks for a "_id" prefix
rather than this exact value. we should standardize. OR, remove names - which is in the bugdb. Anyway, this
is dubious here at the moment.
*/
copy(system_indexes_from.c_str(), system_indexes_to.c_str(), true, logForRepl, masterSameProcess, slaveOk, BSON( "name" << NE << "_id_" ) );
return true;
}
bool Cloner::go(const char *masterHost, string& errmsg, const string& fromdb, bool logForRepl, bool slaveOk, bool useReplAuth) {
massert( "useReplAuth is not written to replication log", !useReplAuth || !logForRepl );
string todb = database->name;
stringstream a,b;
a << "localhost:" << port;
b << "127.0.0.1:" << port;
bool masterSameProcess = ( a.str() == masterHost || b.str() == masterHost );
if ( masterSameProcess ) {
if ( fromdb == todb && database->path == dbpath ) {
// guard against an "infinite" loop
/* if you are replicating, the local.sources config may be wrong if you get this */
errmsg = "can't clone from self (localhost).";
return false;
}
}
/* todo: we can put thesee releases inside dbclient or a dbclient specialization.
or just wait until we get rid of global lock anyway.
*/
string ns = fromdb + ".system.namespaces";
auto_ptr<DBClientCursor> c;
{
dbtemprelease r;
if ( !masterSameProcess ) {
auto_ptr< DBClientConnection > c( new DBClientConnection() );
if ( !c->connect( masterHost, errmsg ) )
return false;
if( !replAuthenticate(c.get()) )
return false;
conn = c;
} else {
conn.reset( new DBDirectClient() );
}
c = conn->query( ns.c_str(), BSONObj(), 0, 0, 0, slaveOk ? Option_SlaveOk : 0 );
}
if ( c.get() == 0 ) {
errmsg = "query failed " + ns;
return false;
}
while ( 1 ) {
{
dbtemprelease r;
if ( !c->more() )
break;
}
BSONObj collection = c->next();
BSONElement e = collection.findElement("name");
if ( e.eoo() ) {
string s = "bad system.namespaces object " + collection.toString();
/* temp
out() << masterHost << endl;
out() << ns << endl;
out() << e.toString() << endl;
exit(1);*/
massert(s.c_str(), false);
}
assert( !e.eoo() );
assert( e.type() == String );
const char *from_name = e.valuestr();
if( strstr(from_name, ".system.") ) {
/* system.users is cloned -- but nothing else from system. */
if( strstr(from_name, ".system.users") == 0 )
continue;
}
else if( strchr(from_name, '$') ) {
// don't clone index namespaces -- we take care of those separately below.
continue;
}
BSONObj options = collection.getObjectField("options");
/* change name "<fromdb>.collection" -> <todb>.collection */
const char *p = strchr(from_name, '.');
assert(p);
string to_name = todb + p;
//if( !options.isEmpty() )
{
string err;
const char *toname = to_name.c_str();
userCreateNS(toname, options, err, logForRepl);
/* chunks are big enough that we should create the _id index up front, that should
be faster. perhaps we should do that for everything? Not doing that yet -- not sure
how we want to handle _id-less collections, and we might not want to create the index
there.
*/
if ( strstr(toname, "._chunks") )
ensureHaveIdIndex(toname);
}
copy(from_name, to_name.c_str(), false, logForRepl, masterSameProcess, slaveOk);
}
// now build the indexes
string system_indexes_from = fromdb + ".system.indexes";
string system_indexes_to = todb + ".system.indexes";
copy(system_indexes_from.c_str(), system_indexes_to.c_str(), true, logForRepl, masterSameProcess, slaveOk, BSON( "name" << NE << "_id_" ) );
return true;
}