Can i have multiple batches or a batch contain multiple ItemList of arrays and multiple ViewData arr

Unknown
Unknown
in EMA

I am requesting batch of RIC array(ItemList) and FID array(ViewData) in java but now i also have some specific RIC for which i need to ask only specific fids which i cannot sent in one batch what approach i need to folllow? Can i have multiple batches or a batch contain multiple ItemList of arrays and multiple ViewData array?

Tagged:

Best Answer

  • pimchaya.wongrukun01
    pimchaya.wongrukun01
    Answer ✓

    Hello @MayassK

    I understand that you would like to request some RICs with difference fields e.g. RIC JPY=, TRI.N, 0005.HK with FID 22 and 25 and RIC EUR=, PTT.BK with FID 5 and 11. Is this right?

    To request RICs with difference fields, you need to have multiple batch. Each batch contains the RICs with you would like the same fields . The example source code below shows to request RIC JPY=, TRI.N, 0005.HK with FID 22 and 25 and RIC EUR=, PTT.BK with FID 5 and 11.

    OmmArray arrayv1 = EmaFactory.createOmmArray();
    arrayv1.fixedWidth(2);
    arrayv1.add(EmaFactory.createOmmArrayEntry().intValue(22));
    arrayv1.add(EmaFactory.createOmmArrayEntry().intValue(25));
              
    OmmArray arrayb1 = EmaFactory.createOmmArray();
    arrayb1.add(EmaFactory.createOmmArrayEntry().ascii("JPY="));
    arrayb1.add(EmaFactory.createOmmArrayEntry().ascii("TRI.N"));
    arrayb1.add(EmaFactory.createOmmArrayEntry().ascii("0005.HK"));

    ElementList batchView1 = EmaFactory.createElementList();
    batchView1.add(EmaFactory.createElementEntry().array(EmaRdm.ENAME_BATCH_ITEM_LIST, arrayb1));
    batchView1.add(EmaFactory.createElementEntry().uintValue(EmaRdm.ENAME_VIEW_TYPE, 1));
    batchView1.add(EmaFactory.createElementEntry().array(EmaRdm.ENAME_VIEW_DATA, arrayv1));
              
    consumer.registerClient(EmaFactory.createReqMsg().serviceName("ELEKTRON").payload(batchView1), appClient);

                

    OmmArray arrayv2 = EmaFactory.createOmmArray();
    arrayv2.fixedWidth(2);
    arrayv2.add(EmaFactory.createOmmArrayEntry().intValue(5));
    arrayv2.add(EmaFactory.createOmmArrayEntry().intValue(11)); 

    OmmArray arrayb2 = EmaFactory.createOmmArray();
    arrayb2.add(EmaFactory.createOmmArrayEntry().ascii("EUR="));
    arrayb2.add(EmaFactory.createOmmArrayEntry().ascii("PTT.BK"));
                
    ElementList batchView2 = EmaFactory.createElementList();
    batchView2.add(EmaFactory.createElementEntry().array(EmaRdm.ENAME_BATCH_ITEM_LIST, arrayb2));
    batchView2.add(EmaFactory.createElementEntry().uintValue(EmaRdm.ENAME_VIEW_TYPE, 1));
    batchView2.add(EmaFactory.createElementEntry().array(EmaRdm.ENAME_VIEW_DATA, arrayv2));

    consumer.registerClient(EmaFactory.createReqMsg().serviceName("ELEKTRON").payload(batchView2), appClient);

Answers

  • Unknown
    Unknown

    Thank you Pimchaya.Wongrukun for your help.

    In your example code, your created two batch views but at runtime i am not sure about the number. It could be two or more.

    Can you give me an example where I can create N number of batch views?

    Thankyou!

  • pimchaya.wongrukun01
    pimchaya.wongrukun01

    Hello @MayassK

    To create N number of batch views, one possible solution is to declare a method which creates a batch views request and send the request to the server. Hence, you can call the method N times at runtime whenever you would like to send a request.

    For example, I declare a method named sendBatchViewRequest(..) under Consumer class 

    void sendBatchViewRequest(Vector<String> RICs, Vector<Integer> fids, OmmConsumer consumer, AppClient appClient, String service) {
            OmmArray arrayv = EmaFactory.createOmmArray();
            arrayv.fixedWidth(2);
            Iterator<Integer> fidIter = fids.iterator(); 
            while (fidIter.hasNext()) 
               arrayv.add(EmaFactory.createOmmArrayEntry().intValue(fidIter.next()));
            
            OmmArray arrayb = EmaFactory.createOmmArray();
            Iterator<String> RICIter = RICs.iterator(); 
            while (RICIter.hasNext()) 
               arrayb.add(EmaFactory.createOmmArrayEntry().ascii(RICIter.next()));
            
            ElementList batchView = EmaFactory.createElementList();
            batchView.add(EmaFactory.createElementEntry().array(EmaRdm.ENAME_BATCH_ITEM_LIST, arrayb));
            batchView.add(EmaFactory.createElementEntry().uintValue(EmaRdm.ENAME_VIEW_TYPE, 1));
            batchView.add(EmaFactory.createElementEntry().array(EmaRdm.ENAME_VIEW_DATA, arrayv));
            
            consumer.registerClient(EmaFactory.createReqMsg().serviceName(service).payload(batchView), appClient);
    }

    Call the method to send a batch view request:

    Consumer myConsumer = new Consumer();
    Vector<String> RICsVector  = new Vector<String>();
    RICsVector.add("EUR=");
    RICsVector.add("PTT.BK");
    Vector<Integer> fidsVector  = new Vector<Integer>();
    fidsVector.add(5);
    fidsVector.add(11);
    myConsumer.sendBatchViewRequest(RICsVector,fidsVector,consumer,appClient,"ELEKTRTON");


Categories