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Once a connection to the Whisperer server is established, the Customer Application needs to make subscriptions to the Feeds and Markets in which it is interested. There are two types of subscriptions: pricing and trading. They differ in the following manner:

• Pricing subscribePricing(int feedID, String clSubID)

• Trading subscribeTrading(int feedID, String clSubID)

Info
titleMarketID Subscriptions

When making a subscription to Pricing and/or Trading you will notice that the subscribe arguments above do not permit the user to specify individual MarketIDs. This is because a subscription is absolute (meaning that all MarketIDs associated with the Feed are either subscribed or the subscription is rejected). Individual MarketIDs can only be enabled or disabled by MarketFactory at the configuration level during the creation of a Feed or through MarketFactory maintenance windows.

Note that the subscription request identifier clSubID should be used to track the subscription request. Once subscribed to both pricing and trading, the client will receive quote requests for instruments to stream to the venue. 

When making subscriptions the Customer Application should check the return code. For example, if the provided feed id is invalid the method will return APIResult.INVALID_FEED and the subscription request will not be sent to the Whisperer server.

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