encode Vector in FieldList
Hi all,
From the RFA_DevelopersGuide:
FieldList is a non-uniform container of field identifier-value paired entries known as a fieldEntry. A Field
Identifier, also known as a fieldId (or FID), is a signed value refering to a specific name and information
type defined by an external field dictionary, such as the RDMFieldDictionary. Values in a FieldList can be
a primitive or container type.
that means a FieldList can have a FieldEntry which encodes a container type : Vector, Map, FieldList.
FieldEntry(FieldId, ContainerType)
However, the RDMFieldDictionary supports only
- ALPHANUMERIC
- ENUMERATED
- BINARY
- DATE
- TIME_SECONDS
- TIME
- PRICE
- INTEGER
I didn't manage to find out an example from RFA_Example.
Do you know how to encode a container type like Vector in FieldList ?
0
Best Answer
-
Thanks for reaching out to us.
Yes, you are correct. A field entry can contain a container, such as Vector.
A vector in a field entry is typically used in the yield curve domain with the following fields.
CASH_RATES "CASH RATES" 30141 NULL NONE 0 VECTOR 0
FUTR_PRCS "FUTURE PRICES" 30151 NULL NONE 0 VECTOR 0
SWAP_RATES "SWAP RATES" 30161 NULL NONE 0 VECTOR 0The code to encode a vector in a field entry looks like this:
field.clear();
field.setFieldID(30141);
Vector vector;
encodeTestVector(&vector);
field.setData(static_cast<const Data&>(vector));
fieldListWIt.bind(field);
void Encoder::encodeTestFieldList(FieldList* pFieldList)
{
assert(pFieldList);
FieldListWriteIterator fieldListWIt;
DataBuffer dataBuffer;
pFieldList->clear();
fieldListWIt.start(*pFieldList);
FieldEntry field;
Real32 real32;
real32.setMagnitudeType(ExponentNeg2);
real32.setValue(_trdPrice++);
field.setFieldID(6);//TRDPRC_1
dataBuffer.setReal32(real32);
field.setData(dataBuffer);
fieldListWIt.bind(field);
fieldListWIt.complete();
}
void Encoder::encodeTestVector(Vector* pVector)
{
assert(pVector);
VectorWriteIterator vectorWIt;
vectorWIt.start(*pVector);
FieldList fieldList;
encodeTestFieldList(&fieldList);
VectorEntry vEntry;
vEntry.setPosition(0);
vEntry.setAction(VectorEntry::Set);
vEntry.setData(static_cast<const Data&>(fieldList));
vectorWIt.bind(vEntry);
vEntry.clear();
vEntry.setPosition(1);
vEntry.setAction(VectorEntry::Set);
vEntry.setData(static_cast<const Data&>(fieldList));
vectorWIt.bind(vEntry);
vectorWIt.complete();
}The consumer will get the following data.
<updateMsg domainType="RSSL_DMT_MARKET_PRICE" streamId="4" containerType="RSSL_DT_FIELD_LIST" flags="0x0" updateType="0 (RDM_UPD_EVENT_TYPE_UNSPECIFIED)" dataSize="58">
<dataBody>
<fieldList flags="0x8 (RSSL_FLF_HAS_STANDARD_DATA)">
<fieldEntry fieldId="2" data="64"/>
<fieldEntry fieldId="6" data="0C00 88"/>
<fieldEntry fieldId="258" data="5445 5354 2053 7472 696E 67"/>
<fieldEntry fieldId="30141" data="0004 0002 0200 0908 0001 0006 030C 0089 0201 0908 0001 0006 030C 0089"/>
</fieldList>
</dataBody>
</updateMsg>
<!-- End Message (Channel IPC descriptor = 560) -->
UpdateMsg
streamId="5"
domain="MarketPrice Domain"
updateTypeNum="0"
name=".CSI931818CNY04"
serviceId="1"
serviceName="DIRECT_FEED"
Payload dataType="FieldList"
FieldList
FieldEntry fid="2" name="RDNDISPLAY" dataType="UInt" value="100"
FieldEntry fid="6" name="TRDPRC_1" dataType="Real" value="1.36"
FieldEntry fid="258" name="SEG_TEXT" dataType="Rmtes" value="TEST String"
FieldEntry fid="30141" name="CASH_RATES" dataType="Vector"
Vector sortable="false"
VectorEntry action="Set index="0" dataType="FieldList"
FieldList
FieldEntry fid="6" name="TRDPRC_1" dataType="Real" value="1.37"
FieldListEnd
VectorEntryEnd
VectorEntry action="Set index="1" dataType="FieldList"
FieldList
FieldEntry fid="6" name="TRDPRC_1" dataType="Real" value="1.37"
FieldListEnd
VectorEntryEnd
VectorEnd
FieldEntryEnd
FieldListEnd
PayloadEnd
UpdateMsgEnd0
Answers
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