Join the 80,000 other DTN customers who enjoy the fastest, most reliable data available. There is no better value than DTN!

(Move your cursor to this area to pause scrolling)




"I was on the phone with a friend who uses CQG and right after the Fed announcement, CQG was as much as 30 seconds behind DTN.IQ. Some quotes were off by as much as 15-18 cents. Your feed never missed a beat." - Comment from Roger
"Thank you so much - awesome feed, awesome service!" - Comment from Greg via Email
"You are either overstaffed or people just don't have problems with your feed because customer support always answers the phone quickly." - Comment from Jay via Email
"Thanks for all of your help. Great customer service deserves to be recognized which one the reasons I've been a customer of DTN for over 10 years!" - Comment from Stuart
"Boy, probably spent a thousand hours trying to get ******* API to work right. And now two hours to have something running with IQFeed. Hmmm, guess I was pretty stupid to fight rather than switch all this time. And have gotten more customer service from you guys already than total from them… in five years." - Comment from Jim
"I just wanted to let you know how fast and easy I found it to integrate IQFeed into our existing Java code using your JNI client. In my experience, such things almost never go so smoothly - great job!" - Comment from Nate
"Everything is working great ! Very impressive client. The news refreshes better and is more pertinent than the ******* feed I paid $ 100/month for. I Also like the charts a lot." - Comment from Leon
"I'm very glad I switched to IQFeed. It's working perfectly with no lag, even during fast market conditions." - Comment from Andy via Email
"If you want customer service that answers the phone, your best bet is IQFeed. I cannot stop praising them or their technical support. They are always there for you, and they are quick. I have used ****** too but the best value is IQFeed." - Comment from Public Forum
"I've been using Neoticker RT with IQFeed for two months, and I'm very happy with both of the products (I've had IQFeed for two years with very few complaints). The service from both companies is exceptional." - Comment from Public Forum
Home  Search  Register  Login  Recent Posts

Information on DTN's Industries:
DTN Oil & Gas | DTN Trading | DTN Agriculture | DTN Weather
Follow DTNMarkets on Twitter
DTN.IQ/IQFeed on Twitter
DTN News and Analysis on Twitter
»Forums Index »IQFeed Developer »IQFeed Developer Support »[COM]: Daily and intraday history requests from separate threads
Author Topic: [COM]: Daily and intraday history requests from separate threads (6 messages, Page 1 of 1)

dis
-Interested User-
Posts: 24
Joined: Apr 16, 2007


Posted: Jun 8, 2007 09:02 AM          Msg. 1 of 6
Is it possible to do 2 historical requests (daily and intraday) from separate threads at the same time? Can the data be corrupted in such situation?

DTN_Steve_S
-DTN Guru-
Posts: 2088
Joined: Nov 21, 2005


Posted: Jun 8, 2007 09:08 AM          Msg. 2 of 6
This is 100% possible. I know that several of our developers use the COM requests in this way. There should not be any chance of data corruption.

dis
-Interested User-
Posts: 24
Joined: Apr 16, 2007


Posted: Jun 8, 2007 09:37 AM          Msg. 3 of 6
But... If OnAbortedLoad event would be raised, how I could determinate which request failed?

DTN_Steve_S
-DTN Guru-
Posts: 2088
Joined: Nov 21, 2005


Posted: Jun 8, 2007 09:45 AM          Msg. 4 of 6
Since you would be using multiple threads, each request (and response) should be completely isolated from each other request. As a result, you would determine this the same way you do now with a single request.

simon33
-Interested User-
Posts: 28
Joined: Apr 9, 2005


Posted: Jun 11, 2007 10:39 PM          Msg. 5 of 6
However, this is not possible via TCP/IP correct? I have attempted this and it appears to handle them sequentially (I use java and connect via sockets). Does that match the information that you have?

I ask because even though it seems to be sequential handling of requests (I turned on DTN logs and that is what I see) we did have a situation in our logs that seems to indicate otherwise.

DTN_Steve_S
-DTN Guru-
Posts: 2088
Joined: Nov 21, 2005


Posted: Jun 12, 2007 09:25 AM          Msg. 6 of 6
TCP/IP handles it the same way as COM.

If you make simultaneous connections, they will get executed simultaneously.

Depending upon exactly how you are making your requests, the logs may not be a very good indicator of what is acutally happening. This is a design flaw of the logging implementation in IQConnect.

If you open 2 separate socket connections to IQConnect and make simultaneous requests, you will get data returned on both sockets simultaneously.

If you open a single socket and make 2 separate requests at the same time, they will be executed sequentially.
 

 

Time: Thu April 9, 2020 4:32 AM CFBB v1.2.0 15 ms.
© AderSoftware 2002-2003