In the streamMap definition, the itemStale element identifies a column in the Event Stream Processor source stream that carries a flag indicating whether incoming RMDS data has gone stale.
adapter (required, limit one)
|----publication (required, limit one)
|----streamMaps (required, limit one)
| '----streamMap (required)
| |----itemName (required, limit one)
| |----serviceName (optional)
| |----sequenceNumber (optional)
| |----itemStale (optional)
| |----dataField (required)
| |----updateNumber (required)
| |----dateTimeField (optional)
| |----FIDListField (optional)
| '----nullField (optional)
|----recordTypeMap (optional)
| '----recordType (optional)
|----rfa (required, limit one)
'----itemLists (required, limit one)
'----itemList (required)
'----item (optional)
streamMap
None
| Name | Description | Requirement |
|---|---|---|
| name | A string that appears in any adapter-related log entries | Required |
Use this element in the streamMap if one of the columns in the source stream is a "stale" flag.
RMDS itself does not supply a stale flag with regular market data, although it may pass along such a flag if it is provided by another service you are subscribing to via RMDS. If this element is used in the streamMap, the adapter sends out an update value of 1 if it receives a stale flag from RMDS, or stops receiving any data from RMDS.
<streamMap name="stream1">
<itemName key="true"/>
<FIDListField />
<!-- serviceName / -->
<sequenceNumber />
<itemStale/>
<dataField name="BID"/>
<dataField name="ASK"/>
<dataField name="TRDPRC_1"/>
<dataField name="ACVOL_1"/>
<dateTimeField timeName="TIMACT" dateName="ACTIV_DATE"/>
</streamMap>
The fourth column of the source stream is identified as the one that is updated if the adapter receives a stale notification, or stops receiving data from RMDS.