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Posted to users@jena.apache.org by Laura Morales <la...@mail.com> on 2017/11/29 11:56:00 UTC
Error 500: Not in a transaction
So, this is the Assembler file that I'm trying to use:
======================================================
PREFIX : <#>
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#>
[] rdf:type fuseki:Server ;
fuseki:services (
<#service_tdb2>
) .
<#service_tdb2> a fuseki:Service ;
rdfs:label "TDB2 Service" ;
fuseki:name "tdb2" ;
fuseki:serviceQuery "query", "sparql" ;
fuseki:dataset <#dataset> ;
.
<#dataset> a ja:RDFDataset ;
# tdb2:location "" ;
# tdb2:unionDefaultGraph true ;
ja:namedGraph [ ja:graphName <http://example.org/g1> ;
ja:graph <#g1> ] ;
.
<#g1> a tdb2:GraphTDB2 ;
tdb2:location "g1" ;
.
======================================================
what I'm trying to do, basically, is to have a dataset with multiple graphs but where each graph is located in its own location. Adding another graph would be (ideally) like this:
<#g2> a tdb2:GraphTDB2 ;
tdb2:location "g2" ;
.
With the above assembler:
# select ?g where { graph ?g {} }
this query works, I get a list of graphs
# select * from ex:g1 where { ?s ?p ?o } limit 10
this query doesn't work, I get "Error 500: Not in a transaction" but I really don't understand how to fix this. Is it possible to do what I'm trying to achive?
Re: Error 500: Not in a transaction
Posted by Andy Seaborne <an...@apache.org>.
See "compared to TDB1"
http://jena.staging.apache.org/documentation/tdb2/
On 02/12/17 13:18, Laura Morales wrote:
>> Extracting a single graph from TDB2 and using it in a general dataset
>> isn't supported (yet, if ever).
>
> TDB-1 does it though, doesn't it? https://jena.apache.org/documentation/tdb/assembler.html#mixed-datasets
>
Re: Error 500: Not in a transaction
Posted by Laura Morales <la...@mail.com>.
> Extracting a single graph from TDB2 and using it in a general dataset
> isn't supported (yet, if ever).
TDB-1 does it though, doesn't it? https://jena.apache.org/documentation/tdb/assembler.html#mixed-datasets
Re: Error 500: Not in a transaction
Posted by Andy Seaborne <an...@apache.org>.
Extracting a single graph from TDB2 and using it in a general dataset
isn't supported (yet, if ever).
Andy
On 29/11/17 11:56, Laura Morales wrote:
> So, this is the Assembler file that I'm trying to use:
>
> ======================================================
> PREFIX : <#>
> 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#>
>
> [] rdf:type fuseki:Server ;
> fuseki:services (
> <#service_tdb2>
> ) .
>
> <#service_tdb2> a fuseki:Service ;
> rdfs:label "TDB2 Service" ;
> fuseki:name "tdb2" ;
> fuseki:serviceQuery "query", "sparql" ;
> fuseki:dataset <#dataset> ;
> .
>
> <#dataset> a ja:RDFDataset ;
> # tdb2:location "" ;
> # tdb2:unionDefaultGraph true ;
> ja:namedGraph [ ja:graphName <http://example.org/g1> ;
> ja:graph <#g1> ] ;
> .
>
> <#g1> a tdb2:GraphTDB2 ;
> tdb2:location "g1" ;
> .
> ======================================================
>
> what I'm trying to do, basically, is to have a dataset with multiple graphs but where each graph is located in its own location. Adding another graph would be (ideally) like this:
>
> <#g2> a tdb2:GraphTDB2 ;
> tdb2:location "g2" ;
> .
>
> With the above assembler:
>
> # select ?g where { graph ?g {} }
>
> this query works, I get a list of graphs
>
> # select * from ex:g1 where { ?s ?p ?o } limit 10
>
> this query doesn't work, I get "Error 500: Not in a transaction" but I really don't understand how to fix this. Is it possible to do what I'm trying to achive?
>