Connecting to Multiple Services simultaneously

We are currently using the RFA 8.2 C++ API to consume market data and would like to clarify some functionality. Is it possible for a consumer application to simultaneously connect to multiple services on TREP/ADS, such as IDN_SELECT etc. and send requests to these different services for different symbols?

Can you also provide the multiple services available and purpose of each one?

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Accepted answers

Jirapongse

@mktdata

Thank you for reaching out to us.

ADS can advertise multiple services via source directory messages. Please refer to the RFA developer guide in section14.2.3 regarding Requesting a Directory.

Then, the application can specify a service name in an item request message.

Handle* StarterConsumer::sendItemRequest(const RFA_String& itemName, const RFA_String& serviceName, UInt8 indicationMask, UInt8 msgModelType, Int32 interType)
{
    Handle* pHandle = 0;
    ReqMsg reqMsg;
    AttribInfo attribInfo;


    reqMsg.setMsgModelType(msgModelType);
    reqMsg.setInteractionType(interType);


    attribInfo.setNameType(INSTRUMENT_NAME_RIC);
    attribInfo.setName(itemName);
    attribInfo.setServiceName(serviceName);


    reqMsg.setAttribInfo(attribInfo);

You can only specify only one service in an item request message.

All comments

Jirapongse

@mktdata

Thank you for reaching out to us.

ADS can advertise multiple services via source directory messages. Please refer to the RFA developer guide in section14.2.3 regarding Requesting a Directory.

Then, the application can specify a service name in an item request message.

Handle* StarterConsumer::sendItemRequest(const RFA_String& itemName, const RFA_String& serviceName, UInt8 indicationMask, UInt8 msgModelType, Int32 interType)
{
    Handle* pHandle = 0;
    ReqMsg reqMsg;
    AttribInfo attribInfo;


    reqMsg.setMsgModelType(msgModelType);
    reqMsg.setInteractionType(interType);


    attribInfo.setNameType(INSTRUMENT_NAME_RIC);
    attribInfo.setName(itemName);
    attribInfo.setServiceName(serviceName);


    reqMsg.setAttribInfo(attribInfo);

You can only specify only one service in an item request message.

mktdata

Thank you for your response. Just to clarify let's say I have configured 3 services ServiceA, ServiceB and ServiceC in my consumer application (Note : Single instance of consumer application). Then is it possible in an item request I can specify the different service name for different request?

For example:

For symbol1, I would use attribInfo.setServiceName(ServiceA);
For symbol2, I would use attribInfo.setServiceName(ServiceC);
For symbol3, I would use attribInfo.setServiceName(ServiceA);

and so on

Can I use this approach?

Jirapongse

Yes, it is possible.

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