Documentation: Set "islandora" to be the default namespace in Blazegraph web interface

Created on 12 Feb 2017  路  13Comments  路  Source: Islandora/documentation

Currently the default namespace is kb in the Blazegraph web interface. We should make it islandora.

Related to:

Vagrant newbie wontfix
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picture ruebot

All 13 comments

https://wiki.blazegraph.com/wiki/index.php/NanoSparqlServer#web.xml

namespace parameter in the Web.xml file, which means we need to deploy blazegraph, then replace the Web.xml with a custom one, then restart tomcat.

whikloj picture whikloj on 13 Feb 2017
👍1

Is it possible to not use the default namespace and instead use one that is Islandora-configured?

ajs6f picture ajs6f on 13 Feb 2017

@ajs6f that's the goal here, and that's what the two related issues/pull requests above do; they use the islandora namespace instead of the default one.

ruebot picture ruebot on 13 Feb 2017

We can by changing our endpoints to be
http://localhost:8080/bigdata/namespace/islandora/sparql

But I'm not sure how to add that secondary... namespace... graph... whatever to Blazegraph.

whikloj picture whikloj on 13 Feb 2017

@whikloj it already is here https://github.com/Islandora-CLAW/claw_vagrant/pull/14/files#diff-6d96235c2d2b9964f1f47a92a98a342a

ruebot picture ruebot on 13 Feb 2017

@ruebot Yeah, I was responding to @whikloj's first comment. I thought he was suggesting to change the default in Blazegraph, but I must have misunderstood.

ajs6f picture ajs6f on 13 Feb 2017
👍1

Forget I said anything...I missed the point here.

whikloj picture whikloj on 13 Feb 2017

Actually no wait, what I said about the web.xml is probably correct. This is just about making it so people don't have to switch the namespaces in the web UI. So changing the default namespace in the web.xml will _probably_ effect that change. However there may be unintended consequences to this action. But if this is just for vagrant and testing and not for the application as a deployment then I would give it a try.

whikloj picture whikloj on 13 Feb 2017
👍1

@whikloj that's it exactly! Good point about surfacing unintended consequences too. Did you want to take this one on after https://github.com/Islandora-CLAW/claw_vagrant/pull/14 gets merged?

ruebot picture ruebot on 13 Feb 2017

Sure

whikloj picture whikloj on 13 Feb 2017
👍1

@whikloj https://github.com/Islandora-CLAW/claw_vagrant/pull/14 has been merged.

ruebot picture ruebot on 14 Feb 2017

Forget this, the setting in the web.xml actually just directs which namespace to apply queries and updates if you don't specify one in the URL.

ie.
With the parameter set to islandora in the web.xml I did

curl -i -XPOST -d "prefix pcdm: <http://pcdm.org/models#> INSERT DATA {<info:testCollection> a pcdm:Collection .}" -H"Content-type: application/sparql-update" http://localhost:8080/bigdata/sparql

Then check in the kb namespace

curl -i -XPOST "http://localhost:8080/bigdata/namespace/kb/sparql" -H"Content-type: application/sparql-query" -d"select ?p ?o where { <info:testCollection> ?p ?o }" 
HTTP/1.1 200 OK
Server: Apache-Coyote/1.1
Content-Type: application/sparql-results+xml;charset=UTF-8
Transfer-Encoding: chunked
Date: Wed, 15 Feb 2017 21:12:40 GMT

<?xml version='1.0' encoding='UTF-8'?>
<sparql xmlns='http://www.w3.org/2005/sparql-results#'>
    <head>
        <variable name='p'/>
        <variable name='o'/>
    </head>
    <results>
    </results>
</sparql>

But querying the islandora namespace

curl -i -XPOST "http://localhost:8080/bigdata/namespace/islandora/sparql" -H"Content-type: application/sparql-query" -d"select ?p ?o where { <info:testCollection> ?p ?o }" 

HTTP/1.1 200 OK
Server: Apache-Coyote/1.1
Content-Type: application/sparql-results+xml;charset=UTF-8
Transfer-Encoding: chunked
Date: Wed, 15 Feb 2017 21:12:23 GMT

<?xml version='1.0' encoding='UTF-8'?>
<sparql xmlns='http://www.w3.org/2005/sparql-results#'>
    <head>
        <variable name='p'/>
        <variable name='o'/>
    </head>
    <results>
        <result>
            <binding name='p'>
                <uri>http://www.w3.org/1999/02/22-rdf-syntax-ns#type</uri>
            </binding>
            <binding name='o'>
                <uri>http://pcdm.org/models#Collection</uri>
            </binding>
        </result>
    </results>
</sparql>

The default namespace in the Web UI is actually set by a user on their first use, then it is stored in the browser's local storage.

If you delete all the cookies/data you can see what it was like the first time.

But short of mimicking a javascript storage call, people just have to change their namespace manually.

whikloj picture whikloj on 15 Feb 2017
👍1

@whikloj shall I label this as 'won't fix' and close it?

ruebot picture ruebot on 15 Feb 2017
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