jena-fuseki | Mirror of Apache Jena - Fuseki
kandi X-RAY | jena-fuseki Summary
kandi X-RAY | jena-fuseki Summary
Mirror of Apache Jena - Fuseki (Incubating)
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of jena-fuseki
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Community Discussions
Trending Discussions on jena-fuseki
QUESTION
Summary: I am trying to use the documentation on JavaScript SPARQL Functions to get a minimal working example of calling a custom javascript function, but it results in a scriptEngine null error.
Details: I setup a fuseki environment following the Docker instructions, so:
...ANSWER
Answered 2022-Mar-10 at 10:28In Apache Jena 3.16.0, the JS engine was Nashorn. Nashorn was deprecated in Java 11 and removed in Java17.
An earlier Java version will have Hashorn in.
Now Jena version 4.4.0 uses the javascript engine of choice which has been added to the classpath, and hence needs to be in the dockerfile. Jena testing uses GraalVM.
QUESTION
my goal is to work on a project using docker without having to constantly rebuild my whole project each time I modify a file a little bit:
The file bellow (not complete) has 2 state, an already updated version that I will call
Version_0 which looks like this :
ANSWER
Answered 2021-Nov-04 at 09:08Try doing docker-compose down
followed by docker-compose up --build
.
It seems that removing the container first fixes some hidden cache problems.
QUESTION
I've had some issues at implementing built-in jena-fuseki reasoner, I could make it work but it would not prevent me from adding incorrect triples. So I wanted to add Openllet reasoner to my jena-fuseki server.
But I can't figure how to add openllet jar to my Docker image and make it work, I've run into many java dependances issues. To add context, my docker-compose looks like that :
...ANSWER
Answered 2021-Nov-02 at 13:47I couldn't find anything from google but I find this on github : The answer
I followed his step by downloading the jar into my server/openllet and extracted the file so I could copy them in the new extra folder with all dependencies
Here is my Dockerfile :
QUESTION
in my SPARQL I have the following bind
...ANSWER
Answered 2021-Oct-22 at 15:38You can use replace
:
QUESTION
I cant get google or stackoverflow to tell me how to load into my Fuseki server a named grapah from a ttl file.
My Java function is
...ANSWER
Answered 2021-Apr-24 at 12:29The calling code is fine.
The 500 error coming from the server and passed on by the client.
The server log file will have details but it looks like the server is running on an read-only file area for a TDB database.
QUESTION
I am using https://github.com/apache/jena/tree/master/jena-fuseki2/jena-fuseki-docker to build a docker image for Apache Jena Fuseki.
I followed the exact same steps mentioned but I am not able to see an in-memory dataset when I use
...ANSWER
Answered 2021-Feb-26 at 07:03dockerfile available at https://jena.apache.org/documentation/fuseki2/fuseki-docker, generates a docker image "with NO UI". Hence, webapp will not be available.
QUESTION
I'm using SPARQLWrapper to query a local SPARQL endpoint (using apache-jena-fuseki), and some of my queries are CONSTRUCT queries.
The query will give me valid results on web-based SPARQL interface, e.g. yasgui. When using SPARQLWrapper, the default query method will give me this error:
...ANSWER
Answered 2020-Nov-05 at 17:35SPARQLWrapper defaults to adding
&format=turtle&output=turtle&results=turtle
to the request.
SPARQLWrapper has a method setOnlyConneg
that turns off the adding of the additional query string parts.
The
WARN SPARQL Query: Unrecognize request parameter (ignored): results
happens because Fuseki does understandresults
and logs a warning about it. It is just a warning.format
is a mechanism to override the proper HTTP content negotiation mechanism because in some situations it is hard to set the HTTP headers. This does not apply to SPARQLWrapper which does correctly setAccept:
.format=turtle
isn't in the list of names for a CONSTRUCT query.ttl
is. (`turtle can be added to future version of Fuseki for completeness).
The best way is not to have the non-standard query string parameters with setOnlyConneg
. SPARQLWrapper correctly sets the "Accept:" header in the request and Fuseki has content negotiation and will work with that header.
QUESTION
I am currently running Amazon Corretto Java 11.0. I have downloaded the apache-jena-fuseki-3.15.0.zip. The archive has been extracted. From a cygwin bash shell, I ran:
...ANSWER
Answered 2020-Jun-23 at 06:57There is a problem with the Apache Jena Fuseki v3.15.0 combined jar (fuseki-server.jar
, not the war file packaging, nor the non-UI jena-fuseki-server
form). It is a bug in v 3.15.0 only, not in 3.14.0.
https://issues.apache.org/jira/browse/JENA-1900
An in-place fix:
https://gist.github.com/afs/a862c0e71b37ce617cd0a592b60609f1
This bash script downloads jena-fuseki-server-3.15.0.jar which does not have the same problem, extracts the "Log4j2Plugins.dat", then replaces the file in fuseki-server.jar.
An alternative to consider is using jena-fuseki-server as a service. It does not have a UI nor maintain a "run/" area - instead it uses a command line arguments, including a configuration file argument, each time it is started.
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Install jena-fuseki
You can use jena-fuseki like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the jena-fuseki component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .
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