Apama Capital Markets Foundation 10.11 | Capital Markets Foundation | Market Data Management | Overview of using MDA
 
Overview of using MDA
To use CMF's MDA, do the following in your CMF application for each datasource from which you want to obtain market data:
1. Connect to a session, which manages the interaction between your CMF application and a market data source. See Connecting to sessions .
2. Optionally, set parameters for market data subscriptions.
3. Set up one or more subscribers to the market data the connected session provides.
4. Do either or both of the following:
*Set up listeners for the market data events you expect to receive.
*Add callbacks that customize default MDA behavior. For example, you can override default error behavior or operate on market data by executing a callback function.
Whether you use listeners or callbacks depends on what you want to do. Use listeners when the underlying event is of use to you as-is without pre-processing. This is especially effective when you are looking for patterns in that event type, such as the price going above a threshold. Use callbacks when you want the pre-processing provided by the subscriber, such as the application of incremental updates to a Depth or OrderBook event before it is returned by a callback.
Note:
Some deployed applications may use legacy market data management components or legacy finance support as opposed to the MDA. Later chapters provide information on legacy interfaces for reference.