EMA Java : -Nameless message with Batch subscription.

gaurav.mahajan

@nick.zincone,

NameLessMessage :- We are making snapshot subscription. So all the messages are recieved as part of "Refresh" message or "Status" message callback.

Suppose i made a batch request for "RIC1", i will receive a "Status" msg where message does not have any name and msg.hasName will be "false" followed by the expected "RefreshMsg". I am calling them nameless as they do not have name with them. This can be seen with EMA Batch example "example370_MarketPrice_Batch". Please find below code for the same where i was referring : -

public void onRefreshMsg(RefreshMsg refreshMsg, OmmConsumerEvent event) { System.out.println("Item Name: " + (refreshMsg.hasName() ? refreshMsg.name() : "<not set>")); System.out.println("Service Name: " + (refreshMsg.hasServiceName() ? refreshMsg.serviceName() : "<not set>"));

System.out.println("Item State: " + refreshMsg.state());

if (DataType.DataTypes.FIELD_LIST == refreshMsg.payload().dataType()) decode(refreshMsg.payload().fieldList());

System.out.println(); }

public void onStatusMsg(StatusMsg statusMsg, OmmConsumerEvent event) { System.out.println("Item Name: " + (statusMsg.hasName() ? statusMsg.name() : "<not set>")); System.out.println("Service Name: " + (statusMsg.hasServiceName() ? statusMsg.serviceName() : "<not set>")); if (statusMsg.hasState()) System.out.println("Item State: " +statusMsg.state());

System.out.println(); }

nick.zincone

Hi @gaurav.mahajan,

I just ran the "example370_MarketPrice_Batch" application as you suggested. I've included the output I'm receiving below where it shows the refresh message containing the name 'TRI.N'.

Are you referring to the initial status message received from the infrastructure after you sent the batch request? Is this the nameless message?

If so, this is normal and expected. It is simply an acknowledge the batch was received. The ADS will process the batch and will attempt to open a series of new requests on your behalf and respond with either a Refresh or Status. It is these subsequent refresh and status messages you should always see a name.