Layer Query with timout and maxResults

SebastianKrings

Hi,

we are performing spatial queries on multiple feature layers at once. At some cases the given geometry is pretty big and causes performance issues.

I am looking for a way to limit the query in time or amount instead of waiting til end or aborting it at al.

This is my current code:

const bufferGeometry = bufferOperator.execute(centerFeature.geometry!, 200, { unit: "meters"});
const bufferSearchResult = await Promise.all(searchLayers.map((l: FeatureLayer) => {
	const query = l.createQuery();
	query.geometry = bufferGeometry
	return l.queryFeatures(query);
}))

 

I could make a timeout on the promise, but that way I am not getting any result at all.
I could limit the results after the query has finisehd but this needs the query to fully perform.
Both is not suitable for us.

Best case we are looking for can:
- limit the query running in time and return all results found so far
- limit the query running by a maximum of results and return as soon as the maximum is reached

Hope to see some ideas, thanks.

SebastianKrings

Just found the num-property which does exactly what I was looking for, limiting the number of results and (hopefully) breaking the seach.

This indirectly affects the runtime, so a limitation over time may be optional.

Full code:

const bufferGeometry = bufferOperator.execute(centerFeature.geometry!, 200, { unit: "meters"});
const bufferSearchResult = await Promise.all(searchLayers.map((l: FeatureLayer) => {
	const query = l.createQuery();
	query.geometry = bufferGeometry;
	return l.queryFeatures(query);
}))