static OutMessage query(
Mongo m,
int options,
String ns,
int numToSkip,
int batchSize,
DBObject query,
DBObject fields) {
OutMessage out = new OutMessage(m, 2004);
out._appendQuery(options, ns, numToSkip, batchSize, query, fields);
return out;
}
private synchronized Response go(
OutMessage msg,
DBCollection coll,
boolean forceReponse,
ReadPreference readPref,
DBDecoder decoder)
throws IOException {
if (_processingResponse) {
if (coll == null) {
// this could be a pipeline and should be safe
} else {
// this could cause issues since we're reading data off the wire
throw new IllegalStateException(
"DBPort.go called and expecting a response while processing another response");
}
}
_calls++;
if (_socket == null) _open();
if (_out == null) throw new IllegalStateException("_out shouldn't be null");
try {
msg.prepare();
msg.pipe(_out);
if (_pool != null) _pool._everWorked = true;
if (coll == null && !forceReponse) return null;
_processingResponse = true;
return new Response(_sa, coll, _in, (decoder == null ? _decoder : decoder));
} catch (IOException ioe) {
close();
throw ioe;
} finally {
_processingResponse = false;
}
}
private synchronized Response findOne(String ns, DBObject q) throws IOException {
OutMessage msg = OutMessage.query(null, 0, ns, 0, -1, q, null);
Response res = go(msg, null, true, null, null);
return res;
}
private synchronized Response findOne(DB db, String coll, DBObject q) throws IOException {
OutMessage msg = OutMessage.query(db._mongo, 0, db.getName() + "." + coll, 0, -1, q, null);
Response res = go(msg, db.getCollection(coll), null);
return res;
}