// ns is either a full namespace or "dbname." when invalidating for a whole db
void ClientCursor::invalidate(const char *ns) {
Lock::assertWriteLocked(ns);
int len = strlen(ns);
const char* dot = strchr(ns, '.');
verify( len > 0 && dot);
bool isDB = (dot == &ns[len-1]); // first (and only) dot is the last char
{
//cout << "\nTEMP invalidate " << ns << endl;
Database *db = cc().database();
verify(db);
verify( str::startsWith(ns, db->name) );
for( LockedIterator i; i.ok(); ) {
ClientCursor *cc = i.current();
bool shouldDelete = false;
if ( cc->_db == db ) {
if (isDB) {
// already checked that db matched above
dassert( str::startsWith(cc->_ns.c_str(), ns) );
shouldDelete = true;
}
else {
if ( str::equals(cc->_ns.c_str(), ns) )
shouldDelete = true;
}
}
if ( shouldDelete ) {
i.deleteAndAdvance();
}
else {
i.advance();
}
}
/*
note : we can't iterate byloc because clientcursors may exist with a loc of null in which case
they are not in the map. perhaps they should not exist though in the future? something to
change???
CCByLoc& bl = db->ccByLoc;
for ( CCByLoc::iterator i = bl.begin(); i != bl.end(); ++i ) {
ClientCursor *cc = i->second;
if ( strncmp(ns, cc->ns.c_str(), len) == 0 ) {
verify( cc->_db == db );
toDelete.push_back(i->second);
}
}*/
/*cout << "TEMP after invalidate " << endl;
for( auto i = clientCursorsById.begin(); i != clientCursorsById.end(); ++i ) {
cout << " " << i->second->ns << endl;
}
cout << "TEMP after invalidate done" << endl;*/
}
}
/* called every 4 seconds. millis is amount of idle time passed since the last call -- could be zero */
void ClientCursor::idleTimeReport(unsigned millis) {
LockedIterator i;
unsigned sz = clientCursorsById.size();
if (sz >= 100000) {
RATELIMITED(300000) log() << "warning number of open cursors is very large: " << sz << endl;
}
while (i.ok()) {
ClientCursor *cc = i.current();
if (cc->shouldTimeout(millis)) {
LOG(1) << "killing old cursor " << cc->_cursorid << ' ' << cc->_ns
<< " idle:" << cc->idleTime() << "ms" << endl;
i.deleteAndAdvance();
} else {
i.advance();
}
}
}
/* called every 4 seconds. millis is amount of idle time passed since the last call -- could be zero */
void ClientCursor::idleTimeReport(unsigned millis) {
bool foundSomeToTimeout = false;
// two passes so that we don't need to readlock unless we really do some timeouts
// we assume here that incrementing _idleAgeMillis outside readlock is ok.
{
recursive_scoped_lock lock(ccmutex);
{
unsigned sz = clientCursorsById.size();
static time_t last;
if( sz >= 100000 ) {
if( time(0) - last > 300 ) {
last = time(0);
log() << "warning number of open cursors is very large: " << sz << endl;
}
}
}
for ( CCById::iterator i = clientCursorsById.begin(); i != clientCursorsById.end(); ) {
CCById::iterator j = i;
i++;
if( j->second->shouldTimeout( millis ) ) {
foundSomeToTimeout = true;
}
}
}
if( foundSomeToTimeout ) {
// todo: ideally all readlocks automatically note what we are locking for so this
// can be reported in currentop command. e.g. something like:
// readlock lk("", "timeout cursors");
readlock lk("");
for( LockedIterator i; i.ok(); ) {
ClientCursor *cc = i.current();
if( cc->shouldTimeout(0) ) {
numberTimedOut++;
LOG(1) << "killing old cursor " << cc->_cursorid << ' ' << cc->_ns
<< " idle:" << cc->idleTime() << "ms\n";
i.deleteAndAdvance();
}
else {
i.advance();
}
}
}
}
// ns is either a full namespace or "dbname." when invalidating for a whole db
void ClientCursor::invalidate(const StringData &ns) {
Lock::assertWriteLocked(ns);
size_t dotpos = ns.find('.');
verify(dotpos != string::npos);
bool isDB = (dotpos + 1) == ns.size(); // first (and only) dot is the last char
{
//cout << "\nTEMP invalidate " << ns << endl;
Database *db = cc().database();
verify(db);
verify( ns.startsWith(db->name()) );
for( LockedIterator i; i.ok(); ) {
ClientCursor *cc = i.current();
bool shouldDelete = false;
if (cc->c()->shouldDestroyOnNSDeletion() && cc->_db == db) {
if (isDB) {
// already checked that db matched above
dassert( StringData(cc->_ns).startsWith(ns) );
shouldDelete = true;
}
else {
if ( ns == cc->_ns )
shouldDelete = true;
}
}
if ( shouldDelete ) {
i.deleteAndAdvance();
}
else {
i.advance();
}
}
}
}
void ClientCursor::invalidateAllCursors() {
verify(Lock::isW());
for( LockedIterator i; i.ok(); ) {
i.deleteAndAdvance();
}
}
