Jena Fuseki 5.5.0 - Does the Spatial-Indexer reload the spatial index?

[chaoshades]

Question

Hello everyone,
Does the new Spatial-Indexer feature added in Jena Fuseki 5.5.0 also reload the spatial index without restarting?

from this great contribution : #3027

Description

We followed the steps documented here apache/jena-site#213 to setup the config and the spatial index is regenerated without any issue. However, Fuseki needs to be restarted to reload the index.

It's quite fast to restart though and we are running in containers, so planning restarts would not be an issue if this is not available.

Use Case

One of our system will export its geo-spatial data into Fuseki in a one-way sync fashion. The updates will be frequent because this is the main operational system and it would be better if the GeoSPARQL queries would operate on the fresh data.

Configuration

I'm using the container version from jena-fuseki-docker

Entrypoint

./entrypoint.sh --conf /fuseki/run/config.ttl --modules=true

config.ttl

PREFIX fuseki:    <http://jena.apache.org/fuseki#>
PREFIX rdf:       <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX rdfs:      <http://www.w3.org/2000/01/rdf-schema#>
PREFIX tdb2:      <http://jena.apache.org/2016/tdb#>
PREFIX ja:        <http://jena.hpl.hp.com/2005/11/Assembler#>
PREFIX geosparql: <http://jena.apache.org/geosparql#>

<#service> rdf:type fuseki:Service;
    fuseki:name "geoDemo";

    fuseki:endpoint [ fuseki:operation fuseki:query ; fuseki:name "query" ];
    fuseki:endpoint [ fuseki:operation fuseki:update ; fuseki:name "update" ];
    fuseki:endpoint [ fuseki:operation fuseki:gsp-r ; fuseki:name "get" ];
    fuseki:endpoint [ fuseki:operation fuseki:gsp-rw ; fuseki:name "data" ];
    fuseki:endpoint [ fuseki:operation fuseki:upload ; fuseki:name "upload" ];
    fuseki:endpoint [ fuseki:operation fuseki:spatial-indexer ; fuseki:name "spatial-indexer" ] ;
    fuseki:dataset <#geo_ds> .

<#geo_ds> rdf:type geosparql:geosparqlDataset ;
    geosparql:spatialIndexFile   "DB/spatial.index";
    geosparql:srsUri <http://www.opengis.net/def/crs/OGC/1.3/CRS84> ;
    geosparql:inference            true ;
    geosparql:queryRewrite         true ;
    geosparql:indexEnabled         true ;
    geosparql:applyDefaultGeometry false ;
    geosparql:indexSizes           "-1,-1,-1" ;       # Default - unlimited.
    geosparql:indexExpires         "5000,5000,5000" ; # Default - time in milliseconds.
    geosparql:dataset <#baseDataset> ;
    .

<#baseDataset> rdf:type tdb2:DatasetTDB2 ;
    tdb2:location "DB/geoDemo" ;
    .

Jena Fuseki

INFO org.apache.jena.fuseki.Server {} - Module: Spatial Indexer (5.5.0)
INFO org.apache.jena.fuseki.Server {} - Apache Jena Fuseki 5.5.0
...

[afs]

@chaoshades - you have more success in getting an answer to your question by send an email to the Jena users mailing list : [email protected] (you have to subscribe first if you are not already on that list).

[scs-eb]

@chaoshades - I was also exploring the spatial-indexer when I found this discussion.
So, I'm letting you know that I posted something pretty similar on the Jena users mailing list : https://lists.apache.org/thread/y07kpmsnln4zvxfo4wwvgypvofq4hcjn
I would also recommend you to subscribe if you are able to.

[chaoshades]

@scs-eb thanks a lot, last week past way too fast.
I will close this discussion in favor of the post you made.