Data bindings with Java-programmed things

[fsiviero]

Hi,

We are building an Extension and would like to see snippets or examples of the data bindings required for the Extension to get, for example, historic information of one data item.

[danme]

Hi Fransisco,

In order to access property history you will need to have set up a stream or a value stream on your thing itself from the platform end. This will happen after you create a thing based on your extension thing template. Assuming this is set up properly, you can then execute the following command to get the property history:

General property search:

thingName.QueryPropertyHistory(maxItems(double), startDate(Datetime), endDate(Datetime), oldestFirst(Boolean), query(JSON));

if you want to get a specific property, then you can use  more narrow search:

ex.

thingName.QueryStringPropertyHistory(maxItems(double), propertyName(String), startDate(Datetime), endDate(Datetime), oldestFirst(Boolean), query(JSON));

or

thingName.QueryBooleanPropertyHistory(maxItems(double), propertyName(Boolean), startDate(Datetime), endDate(Datetime), oldestFirst(Boolean), query(JSON));

[fsiviero]

Thank you for your answer. How would I access the same data from the REST API instead? Would it be something like: http://localhost/Thingworx/Things/<thing>/QueryPropertyHistory ?

[danme]

Close, it should be

Http://Thingworx/Things/<thing>/Services/QueryPropertyHistory