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Key Concepts
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Background
Device Management
Bulk initialization of Things is closely tied to the device management aspect of IoT Platform. The devices layer is the most important component of an IoT solution. A mature IoT platform comes with comprehensive device management features that let customers:
- On-board existing and new devices with rich metadata.
- Identical devices that share the same metadata are grouped together. This feature makes it possible to search devices based on their capabilities.
- The platform also provides per-device authentication and authorization to enforce enhanced security.
- It makes it easy to define which devices can connect, send, and receive messages.
- Devices can be easily blacklisted and whitelisted through declarative policies.
TQLEngine platform provide mechanisms to easily address above device management requirements.
Bulk Initialization Design Pattern
At the time of writing this tutorial Atomiton TQLEngine does not provide specific language constructs to perform bulk initialization of Things or Data. But the existing Atomic domain languages capabilities can be exploited to achieve bulk initialization requirements. The bulk initialization design pattern can be broken down into two steps:
Bulk Initialization Steps:
| Step # | Name | Description | Output | Implementation Flow |
|---|---|---|---|---|
| 1 | Gather Metadata | Input to gathering of metadata step can be:
| The output of gathering metadata step could be:
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| 2 | Initialize | Initialize step includes:
| The output of initialize steps are:
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Greenhouse UseCase
Please refer to 8. Simulating sensors, actuators, and devices for the description of Greenhouse usecase. The data initalization requirement for this case is shown below
Greenhouse Configurator Application Flow
Greenhouse Configuration Requirements
- Ability to add greenhouses on-the-fly
- Each greenhouse must be able to dynamically generate number of lanes, zones per lane
- Add Crop type per lane
Bulk Initialization Implementation
Import baseline Greenhouse Data and Thing Models
- Create a new Project in TQLStudio by importing content from Baseline models.
Pipeline Macros
- Execute Internal Query
| Code Block | ||||||
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<Macro Name="executeQuery">
<Argument>
<QueryString>
<Query/>
</QueryString>
</Argument>
<Result>
<OnRequest Target="[:RuntimeParams.FacetIDName:]" Disable="CMD_SERVER">
<Process Return="CMD_NOP">
<Message>
<Value>
[:$Macro.Argument.QueryString:]
</Value>
</Message>
</Process>
</OnRequest>
</Result>
</Macro> |
Main CreateGreenhouse Macro
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<Macro Name="CreateGreenhouse">
<Argument>
<Greenhouses></Greenhouses>
</Argument>
<Result>
<SetLocalData key="Greenhouses">
<Value>
<Include>$Macro.Argument.Greenhouses</Include>
</Value>
</SetLocalData>
<for each="record" in="Greenhouse" from="$LocalData.Greenhouses" using="$ProcessData">
<JavaScript>
var NumberOfLanes = [:$ProcessData.record.NumberOfLanes:];
var ZonesPerLane = [:$ProcessData.record.ZonesPerLane:];
var NumberOfZones = NumberOfLanes * ZonesPerLane;
sffContext.execute("SetLocalData","key","NumberOfZones","value",NumberOfZones);
</JavaScript>
<!-- Create Query for Greenhouse -->
<SetContextData key="FirstLane">
<Value>Yes</Value>
</SetContextData>
<For each="laneRecord" in="Lane" from="$ProcessData.record.Lanes" using="$LocalData">
<!-- Add Lanes -->
<addLanes>
<GreenhouseID>[:$ContextData.GreenhouseID:]</GreenhouseID>
<LaneName>[:$LocalData.laneRecord.LaneName:]</LaneName>
<LaneLength>110</LaneLength>
<LaneWidth>40</LaneWidth>
<ZoneInLane>[:$ProcessData.record.ZonesPerLane:]</ZoneInLane>
<BorderLane>No</BorderLane>
</addLanes>
<if condition="$Response.Message.Value/Create/Status eq 'Success'">
<then>
<SetLocalData key="LaneID">
<Value>[:$Response.Message.Value.Create.Lane.LaneID:]</Value>
</SetLocalData>
<loadZoneModels>
<LaneID>[:$LocalData.LaneID:]</LaneID>
<ZonesPerLane>[:$ProcessData.record.ZonesPerLane:]</ZonesPerLane>
<CropType>[:$LocalData.laneRecord.CropType:]</CropType>
<FirstLane>[:$ContextData.FirstLane:]</FirstLane>
</loadZoneModels>
</then>
</if>
<SetContextData key="FirstLane">
<Value>No</Value>
</SetContextData>
</For>
</then>
</if>
</for>
</Result>
</Macro> |
Load Zone Models
Data is randomized and generated
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<Macro Name="loadZoneModels">
<Argument>
<ZonesPerLane></ZonesPerLane>
<LaneID></LaneID>
<CropType></CropType>
<FirstLane></FirstLane>
</Argument>
<Result>
<JavaScript>
var ZonesPerLane = 0;
if(!isNaN([:$Macro.Argument.ZonesPerLane:])){
ZonesPerLane = [:$Macro.Argument.ZonesPerLane:];
}
var loadContent = ListMap.static.newInstance();
for (var row=1; row <= ZonesPerLane; row++) {
var svi = loadContent.instanceAdd("addZone");
svi.put("ZoneName", "Zone"+row);
svi.put("LaneID", "[:$Macro.Argument.LaneID:]");
svi.put("ZoneLength", 10);
svi.put("ZoneWidth", 10);
svi.put("Vertex1", 5);
svi.put("Vertex2", 2);
svi.put("Vertex3", 15);
svi.put("Vertex4", 12);
svi.put("EndZone", "No");
svi.put("ZoneAvgSM", 45);
svi.put("CropType", "[:$Macro.Argument.CropType:]");
if("[:$Macro.Argument.FirstLane:]" == "Yes" && row==1){
svi.put("Live", "Yes");
}else{
svi.put("Live", "No");
}
svi.put("GridOnLength", 3);
svi.put("GridOnWidth", 3);
svi.put("GridCount", 9);
svi.put("GridLength", 3.33);
svi.put("GridWidth", 3.33);
svi.put("ZoneTemperature", "0");
svi.put("ZoneHumidity", "0");
svi.put("ZoneAvgLight", "0");
svi.put("NoOfPlants", Math.floor((Math.random() * 100) + 1));
}
sffLog.info("load Zone Content ======== "+loadContent);
loadContent;
</JavaScript>
</Result>
</Macro> |
Queries
Let's start writing some queries to create and read the data.
Reset All Data
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<DeleteAllModelsData/> |
Create Greenhouse
Macro can be called directly
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<CreateGreenhouse>
<Greenhouses>
<Greenhouse>
<GreenHouseName>GreenHouse-1</GreenHouseName>
<Location>
<latitude>1.11</latitude>
<longitude>1.12</longitude>
</Location>
<ZonesPerLane>5</ZonesPerLane>
<NumberOfLanes>2</NumberOfLanes>
<Lanes>
<Lane>
<LaneName>Lane-1</LaneName>
<CropType>Tomato</CropType>
</Lane>
<Lane>
<LaneName>Lane-2</LaneName>
<CropType>Tomato</CropType>
</Lane>
</Lanes>
</Greenhouse>
</Greenhouses>
</CreateGreenhouse> |
Show Query
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<Query>
<Show>
<Entity inherits="DataModel" not.qname="*.TqlSystem.*"/>
</Show>
</Query> |
Find Greenhouse / TempSensor
| Code Block | ||||||
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<Query>
<Find>
<Greenhouse>
<GreenhouseID ne=""/>
</Greenhouse>
</Find>
</Query>
<!-- Custom container -->
<Query as="Khans.GreenDen">
<Find>
<Greenhouse>
<GreenhouseID ne=""/>
</Greenhouse>
</Find>
</Query>
<!-- Filter the result -->
<Query as="Khans.GreenDen">
<Find only="Greenhouse:ExternalEnv">
<Greenhouse>
<GreenhouseID ne=""/>
</Greenhouse>
</Find>
</Query>
<!-- Filter the result -->
<Query as="$none:Greenhouse.Names"> <!-- What happens if we don't use $none -->
<Find only="Greenhouse:GreenhouseName,Greenhouse:ZoneCount">
<Greenhouse>
<GreenhouseID ne=""/>
</Greenhouse>
</Find>
</Query>
<!-- Filter the result -->
<Query as="$none:Greenhouse.Names"> <!-- What happens if we don't use $none -->
<Find only="Greenhouse:GreenhouseName,Greenhouse:ZoneCount" as="$none:$none:$none"> <!-- Knock off Containers -->
<Greenhouse>
<GreenhouseID ne=""/>
</Greenhouse>
</Find>
</Query> |
Complete Model
You can import this model into your engine from this location