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how can i get the response data without call registerClient when I subscribe same ric second time?
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EMA doesn't cache the data. To get the response, you can reissue a request with a handle.
consumer.reissue(ReqMsg().initialImage(true), handle);
With this reissue, the application gets a new refresh via the application callback method.
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Would you like to get update messages(containing only changed fields’ value) after a refresh message(the first data response with all fields you specified in view) like below?
RefreshMsg
streamId="5"
domain="MarketPrice Domain"
solicited
RefreshComplete
state="Open / Ok / None / 'All is well'"
itemGroup="00 01"
permissionData="03 08 42 52 6c"
name="JPY="
nameType="1"
serviceId="2114"
serviceName="API_ELEKTRON_EDGE_TOKYO"
Payload dataType="FieldList"
FieldList FieldListNum="99" DictionaryId="1"
FieldEntry fid="22" name="BID" dataType="Real" value="114.50"
FieldEntry fid="25" name="ASK" dataType="Real" value="114.52"
FieldListEnd
PayloadEnd
RefreshMsgEnd
UpdateMsg
streamId="5"
domain="MarketPrice Domain"
updateTypeNum="0"
name="JPY="
serviceId="2114"
serviceName="API_ELEKTRON_EDGE_TOKYO"
Payload dataType="FieldList"
FieldList
FieldEntry fid="22" name="BID" dataType="Real" value="114.51"
FieldListEnd
PayloadEnd
UpdateMsgEnd
- If yes, before you re-subscribe the RIC, you need to unsubscribe the RIC first e.g. consumer.unregister(RIC2Handle.get("TEST1")); as I explained in the email below(sent on 22 Nov). This is to close the RIC item stream to stop receiving data sent to this item stream. When you re-subscribe the RIC(a new item stream opens), you will get data from the new item stream only.
- If no. You should use snapshot request. After EMA sends a snapshot request, it receives a refresh message. Then, EMA closes this item stream immediately automatically. Hence, the application will not receive any data(update messages) of this RIC. You can re-subscribe this RIC after getting a refresh message without unsubscribing the RIC before(EMA has done this automatically). To request snapshot data, set interestAfterRefresh to false like an example snipped source code below:
consumer.registerClient(reqMsg.serviceName(serviceName).name("TEST1").interestAfterRefresh(false), appClient);
Note: If you set interestAfterRefresh to true, you will get update messages after a refresh messages till you unsubscribe the RIC.
