The main reason I can't have pre-defined topics (in properties file or database) is because symbols are changed every day (some may be added, some may be deleted, some may just change slightly).
Maintaining an accurate list of these symbols is not trivial (some large banks have groups dedicated to this). After sending the original message, I realized that I might be able to take advantage of selectors or 'where clause' like functionality. In other words, I could subscribe to level1 but limit the values to "symbol=MSFT" (which means only MSFT should travel down the wire to the client, nothing else). Can't find if qpid has this capability or not though. falconair wrote: > I would like to publish market data through qpid. Since I have massive > amount of data flowing through the pipes, I can't publish all that data to a > single topic, since the client may only be interested in one or two symbols. > The usual solution to use a hierarchical topic naming scheme. In other > words, rather than publishing every thing to "level1," I want to split data > according to symbols "level1.msft," "level2.orcl," etc. Clearly I can't > have a pre-defined list of topics in some properties file. What is the best > way of solving this? > > I am using qpid m4 or MRG (C++ broker) with jms client api. > I assume you are familiar with the topic exchange (used in the public-subscribe example), and your only question is how to communicate what topics are available for subscriptions? Why not keep the available topics on a database on the server, with a "topic server", a client that reports on the available topics? Jonathan --------------------------------------------------------------------- Apache Qpid - AMQP Messaging Implementation Project: http://qpid.apache.org Use/Interact: mailto:[email protected] -- View this message in context: http://n2.nabble.com/how-to-programatically-create-thousands-of-topics-%28for-marketdata%29--tp2528658p2529000.html Sent from the Apache Qpid users mailing list archive at Nabble.com. --------------------------------------------------------------------- Apache Qpid - AMQP Messaging Implementation Project: http://qpid.apache.org Use/Interact: mailto:[email protected]
