RestHistoryImport

Summary

The RestHistoryImportExt is used to transform data from an API into Niagara histories

Implementation

• In the RestHistoryDeviceExt, add a RestHistoryImport from the palette

• Configure its properties

 Properties

• ExecuteTime: To configure when to pull the values

• HttpConfig : To configure the Http (Get) request to get the history values. See Http Config

• ValueSelector: To select the part of the json which contains the history values. It can be an array or an object. This is a JSON Key Selector based on the Http response. For example: data.all.value (in this case: data is a JSON array, all represents all the JSON objects inside that array and value is the JSON field which contains the value in each object of that array)

• ValueFormat: To select the type of the value (Numeric, String or Boolean)

• TimestampSelector: To select the part of the json which represents the timestamp. Similar to ValueSelector.

• TimestampFormat: To define the encoding used for start and end dates. Will be used to convert them in AbsTimes. Special case: it is possible to convert a "date" which is in milliseconds since Epoch, using the "SSSS" (wihout quotes) format

• TimeZone: To define the timezone given by the API (usually UTC)

• TagsSelector: To define which tags to create for the history based on the returned JSON.

Actions

• Execute: To force the import. (It will use the ExecutionTime value in a steady state)