通过RDF4J接口配置/启用GeoSPARQL插件

Question

我正在尝试自动创建GraphDB存储库，这也必须有GeoSPARQL插件启用。为此，我发送了两个INSERT语句，第一个用于配置索引和准确性，第二个用于启用插件。然而，conn.prepareUpdate(QueryLanguage.SPARQL，enablePluginStatement).execute()操作“似乎”是异步运行的。而不是等待索引操作完成(就像从工作台运行相同的INSERT查询时发生的那样)，它几乎立即继续执行下面的语句，即关闭存储库。当我通过Netbeans调试器执行相同的代码时，相同的语句需要更多的时间才能完成，并且正确地完成了索引。对这个或类似的问题有什么见解吗？

    26609 [main] INFO  com.ontotext.config.AbstractParameter  - Configured parameter 'deduplicate.construct' to default value 'true' 
    26610 [main] INFO  com.ontotext.config.AbstractParameter  - Configured parameter 'reuse.vars.in.subselects' to default value 'false' 
    26691 [main] INFO  com.ontotext.trree.monitorRepository.MonitorRepositoryConnection  - Incoming update: 
PREFIX : <http://www.ontotext.com/plugins/geosparql#> 
INSERT DATA {    _:s :enabled "true" .  } 
    26764 [main] INFO  com.ontotext.plugin.GeoSPARQL  - >>>>>>>> GeoSPARQL: Initializing Lucene indexer... 
    26863 [main] INFO  com.ontotext.plugin.GeoSPARQL  -
        >>>>>>>> GeoSPARQL: Lucene indexer initialized! 
    26863 [main] INFO  com.ontotext.plugin.GeoSPARQL  - >>>>>>>> GeoSPARQL: Initializing indexing process... 
    32032 [main] INFO  com.ontotext.plugin.GeoSPARQL 
        - >>>>>>>> GeoSPARQL: Indexing completed! 
    52200 [main] WARN  com.ontotext.trree.free.GraphDBFreeSchemaRepository  - Closing active connection due to shut down; consider setting the org.eclipse.rdf4j.repository.debug system property 
    52596 [main] INFO  com.ontotext.trree.sdk.impl.PluginManager  - Shutting down plugins (DEFAULT)...

Answer 1

您可以使用复合事务，因为多个由分隔的"insert where“和"delete where”表达式可以在同一更新中看到与前一个表达式相比所做的更改。举个例子：

PREFIX : <http://www.ontotext.com/plugins/geosparql#> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>INSERT DATA {    _:s :enabled "true" .  } ;INSERT DATA { _:s :prefixTree "quad"; :precision "25". }

使用curl：

curl 'http://localhost:7200/repositories/geosparql/statements' -H 'Content-Type: application/x-www-form-urlencoded' --data-urlencode 'update=PREFIX : <http://www.ontotext.com/plugins/geosparql#> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> INSERT DATA { _:s :enabled "true" . } ; INSERT DATA { _:s :prefixTree "quad"; :precision "25". }'

您应该能够首先构建索引，然后设置精度：

[INFO ] 2019-02-26 12:08:36,331 [repositories/geosparql | c.o.g.s.StatementsController] POST SPARQL update request to repository
[INFO ] 2019-02-26 12:08:36,349 [repositories/geosparql | c.o.p.GeoSPARQL] >>>>>>>> GeoSPARQL: Initializing Lucene indexer...
[INFO ] 2019-02-26 12:08:36,383 [repositories/geosparql | c.o.p.GeoSPARQL] >>>>>>>> GeoSPARQL: Lucene indexer initialized!
[INFO ] 2019-02-26 12:08:36,383 [repositories/geosparql | c.o.p.GeoSPARQL] >>>>>>>> GeoSPARQL: Initializing indexing process...
[INFO ] 2019-02-26 12:08:36,466 [repositories/geosparql | c.o.p.GeoSPARQL] >>>>>>>> GeoSPARQL: Indexing completed!