Federating the SPARQL across multiple services #24
Description
I am unable to get the federation working, i have posted my issue in stack-overflow here
can someone help me understand if its possible to construct the shape by linking to entities outside in another SPARQL endpoint. and why do I get the following error:
java.util.concurrent.ExecutionException: HttpException: 400 HTTP 400 error making the query:
Parse error: SELECT * WHERE { VALUES ?x_2 { <http://localhost:7002/resource/CUSTOMERS/11> } OPTIONAL { ?x_2 <http://localhost:7002/resource/vocab/CUSTOMERS_SUPPORTREPID> ?x_2_1 . ?x_2_1 a <http://localhost:7003/resource/vocab/EMPLOYEES> OPTIONAL { ?x_2_1 <http://localhost:7003/resource/vocab/EMPLOYEES_FIRSTNAME> ?x_2_1_1 } } }
Lexical error at line 3, column 11. Encountered: " " (32), after : "VALUES"
at java.util.concurrent.FutureTask.report(Unknown Source)
at java.util.concurrent.FutureTask.get(Unknown Source)
at org.hypergraphql.datafetching.services.SPARQLEndpointService.iterateFutureResults(SPARQLEndpointService.java:86)
at org.hypergraphql.datafetching.services.SPARQLEndpointService.executeQuery(SPARQLEndpointService.java:69)
at org.hypergraphql.datafetching.ExecutionTreeNode.generateTreeModel(ExecutionTreeNode.java:357)
at org.hypergraphql.datafetching.FetchingExecution.call(FetchingExecution.java:21)
at org.hypergraphql.datafetching.FetchingExecution.call(FetchingExecution.java:8)]