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Compilation: a model is deployed to TQLEngine A-Stack and the definition is compiled
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In ThingModels and AppModels, model lifecycle is closely linked to the workflow lifecycle (DataModels do not have Actions or workflows).
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Example of a Create query to instantiate a TempSensor model.
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<Create# Create(format="version,current"> <!--): # This will create --> <TempSensor> <peripheral>serial</peripheral> <baudrate>115200</baudrate> <interfacePort>/ TempSensor: peripheral: serial baudrate: 115200 interfacePort: "/dev/cu.usbserial-AL01C0ME</interfacePort> <interface>serial</interface> <format>ascii</format> <operation>receive</operation> <uniqueId>76522</uniqueId> <payload>$Null()</payload> <tempValue>$Null()</tempValue> </TempSensor> </Save>AL01C0ME" interface: serial format: ascii operation: receive uniqueId: 76522 payload: $Null() tempValue: $Null() |
For update and delete, see common CRUD operations on models.
Model instance data
TQLEngine A-Stack maintains model instances data in the storage (TQLCache) based on the model definition (the model definition itself is not stored, but held in memory). The model instance data storage type is defined in the deployment script. For example, the the deployment script below, the <Process> points to the [:ModelFile:], which will be replaced by the model definition file name at the time of deployment. The Type="Sqlsff" defines that storage type is the SFF unstructured SQL database.
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<NewFacetInstance# NewFacetInstance(fid=: "[:FacetIDName:]" Name=, Name: "[:FacetInstanceName:]", Type=: "SffTqlFacet">): OnActivate: <OnActivate> <NewFacetInstance name=NewFacetInstance(name: "tqlwf", type=: "SffWdlFacet"): /> TopicFacet: TQLGenericTopic <TopicFacet>?TQLGenericTopic</TopicFacet> Process: <Process> <Storage Name=Storage(Name: "[:TQLCacheName:]" Type=, Type: "SqlSff" Comment=, Comment: "[:TQLCacheName:] Database SFF Unstructured SQL database"): /> Namespace: <Namespace> <Include> Include: [:ModelFile:]</Include> <!-- ModelFile #ModelFile contains the definition for the model --> </Namespace> </Process> </OnActivate> ... |
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