...
| Code Block |
|---|
| language | xml |
|---|
| title | Non-repeatable workflow example |
|---|
| linenumbers | true |
|---|
|
placeholder for example of non-repeatable workflow<AppFacet name="CSVLoader">
<String name="destModelName" />
<String name="DriverId" />
<String name="ParkingLotId" />
<String name="fileName" KnownBy="csvLoaderAc" Update="auto" />
<Action name="csvLoaderAc" documentation="Data Facet to load CSV Data">
<Workflow Limit="1" Live="1" Timeout="-1">
<Task name="Main">
<Event name="Argument" as="ActionArgument" />
<Invoke name="CSVDataLoader" waitFor="Argument">
<FacetScript>
<Log Message="Loading file..."/>
<LoadFromCSV fileName="[%:Event.Argument.fileName.Value:%]"
destModelName="[%:Event.Argument.destModelName.Value:%]"
DriverId="[%:Event.Argument.DriverId.Value:%]"
ParkingLotId="[%:Event.Argument.ParkingLotId.Value:%]" />
<Log Message="Loading complete!!!"/>
</FacetScript>
</Invoke>
<Output name="ActionResult">
<Value>
<Log Message="Output file name: [%:Event.Argument.fileName.Value:%]"/>
<fileName>[%:Event.Argument.fileName.Value:%]</fileName>
</Value>
</Output>
</Task>
</Workflow>
</Action>
</AppFacet> |
b. Repeatable (multi-run, stream) workflows
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| Note |
|---|
| title | Use While = "true" in the first task |
|---|
|
Due to the current compiler limitation, you must use While = "true" for the first task that appears in your workflow definition (source code) in order for the compiler to recognize that this is a repeatable workflow. You do not need to specify While = "true" for the subsequent tasks in the same workflow definition. |
| Code Block |
|---|
| language | xml |
|---|
| title | Repeatable workflow example |
|---|
| linenumbers | true |
|---|
|
<ThingFacet Name="TempFacetSerial">
<Number Name="tempValue" update="auto" KnownBy="SerialReadAction" />
<String Name="unit" default="Celsius" Documentation="Celsius or Fahrenheit" />
<String Name="peripheral" />
<String Name="interfacePort" />
<String Name="interface" />
<String Name="uniqueId" default="56789" />
<String Name="baudrate" />
<String Name="format" default="ascii" />
<String Name="operation" />
<String Name="payload" />
<Action Name="SerialReadAction" Documentation="Start the serial port">
<Workflow Limit="1" Live="1" Timeout="-1">
<Task name="Main" while="true">
<Event name="Argument" as="ActionArgument" />
<Invoke name="InvokeSerialRead" waitFor="Argument" get="perif://">
<Message>
<Value>
<InterfacePort>"[%:Event.Argument.interfacePort.Value:%]"
</InterfacePort>
<Baudrate>"[%:Event.Argument.baudrate.Value:%]"</Baudrate>
<Interface>"[%:Event.Argument.interface.Value:%]"</Interface>
<UniqueId>"[%:Event.Argument.uniqueId.Value:%]"</UniqueId>
<Operation>"[%:Event.Argument.operation.Value:%]"</Operation>
<format>"[%:Event.Argument.format.Value:%]"</format>
<Payload>"[%:Event.Argument.payload.Value:%]"</Payload>
<Peripheral>"[%:Event.Argument.peripheral.Value:%]"</Peripheral>
</Value>
</Message>
</Invoke>
<Output name="Result" as="ActionResult">
<Value>
<tempValue>
[%:Invoke.InvokeSerialRead.Message.Value/number(
substring-before(substring-after("[%:Invoke.InvokeSerialRead.Message.Value:%]",
'#TCB:'), '#')):%]
</tempValue>
</Value>
</Output>
</Task>
</Workflow>
</Action>
</ThingFacet> |
Non-waiting versus externally-activated workflows
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