Set and update cache control longest time (cacheMaxAge) for layers and tables

miro_aus — Wed, 18 Sep 2024 00:35:37 GMT

Using ArcGIS Online user interface, it is possible to set / update Cache Control longest time. Default is 30 seconds, longest is 1 hour.

This can be done under Cache Control in Settings tab for Feature Layer (hosted) and Table (hosted) with Source: Feature Service.

I am publishing tables and feature layers programmatically using ArcGIS API for Python. I can't find a way to set the Cache Control value when publishing or update it later.

I did find it as property which I can access, but not update. Simplified example of code variations I have tried:

items = user.items() item = items[0] table = item.tables[0] print(table.properties.cacheMaxAge) cache_definition = {"cacheMaxAge": 600} result = table.manager.update_definition(cache_definition) # result = table.manager.add_to_definition(cache_definition) print(result)

Printing cacheMaxAge does print out the actual value set / updated via interface (in seconds, e.g. 3600 for 1 hour). Result value is "{'success': True}". But the cacheMaxAge value does not update.

How can I set and/or update Cache Control (cacheMaxAge) using ArcGIS API for Python?

Re: Set and update cache control longest time (cacheMaxAge) for layers and tables

EarlMedina — Mon, 23 Sep 2024 20:46:26 GMT

The way you do this is at the Feature Service level. In the API, it is done via a FeatureLayerCollection object. So, you would update your example to something like this:

from arcgis.features import FeatureLayerCollection items = user.items() item = items[0] flc = FeatureLayerCollection.fromitem(item) flc.manager.update_definition({"cacheMaxAge":600})

This appears to round up to 15 minutes, however, because I think only certain intervals are supported.

topic Re: Set and update cache control longest time (cacheMaxAge) for layers and tables in ArcGIS API for Python Questions

Set and update cache control longest time (cacheMaxAge) for layers and tables

Re: Set and update cache control longest time (cacheMaxAge) for layers and tables