Southbound Device Providers

Parking

There are three different categories of data that is generated at A-Stack runtime:

Data Category

Generated By?

Example

Storage Used

System

A-Stack

A-Stack Runtime Policies
User's locally imported project(s) meta data
TqlSubscription requests received over websocket

Hsqldb - In-Process Mode

User

User deployed model(s)

ThingModel (including combined ThingFacet(s))
DataModel
AppModel (including combined AppFacet(s))

Depends on underlying storage specified when creating Tql NewFacetInstance

(SffTqlFacet) as part of deployment package.

Runtime

Facetscript in User deployment model(s)

Temporary Cache

JVM (A-Stack Runtime Environment)

Light

Before we describe in details different generated data types, let's look at the data storage options that are available as part of the TQL. Storage is specified when <Storage> command when creating NewFacetInstance of type SffTqlFacet as part of your deployment package.

Storage Syntax

Storage Command Syntax

<Storage name="NameOfYourStorage" type="SqlSff">
          <url>Storage Connection URL</url>
          <username>Storage Connection Username</username>
          <password>Storage Connection Password</password>
          <driver>Storage Driver Name</driver>
</Storage>