Problem with StardocsConnection (view implementation)

[Becky Tauber]

When trying to create a StardocsConnection, I hit the following message:

General Exception : Could not find an appropriate view implementation of this connection for 'com.complexible.stardog.docs.StardocsConnection’.

I’m 99.99% sure that I have all the jars imported. I checked out the topic on the similar issue with ReasoningConnection, and it looked like it was solved by importing all the jars. I tried adding the jars in my gradle build file, and I also tried downloading the jars and manually adding them to my build path.

Here's what's in my code:

StardocsConnection sConn = ConnectionConfiguration

    .to(dbTitle)

    .server(stardogServer)

    .credentials(stardogUser, stardogPw)

    .connect()

    .as(StardocsConnection.class);

I use an admin connection beforehand to create the database, which is done successfully - so I am connecting to the server. It fails when it gets to the StardocsConnection.

I also tried doing the StardocsConnection this way (below) and got the same issue. I've successfully used this method to create a ReasoningConnection. Again, the database is created, but it fails when it gets to .as(StardocsConnection.class).

StardocsConnection sConn = (admin.memory(dbTitle).connect())

    .as(StardocsConnection.class);

[Jess Balint]

Are you using an HTTP connection? You need the following jars from the client/http directory:

stardog-stardocs-api-4.2.jar

stardog-stardocs-protocols-http-client-4.2.jar

stardog-stardocs-protocols-http-shared-4.2.jar

stardog-stardocs-shared-4.2.jar

Jess

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[Becky Tauber]

Yes, and I just double checked that those 4 are included.

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[Jess Balint]

Hi Becky,

Please try to run this trivial example. You will need to change the references to $STARDOG to point to your Stardog installation directory. You will need to change the database (what you call dbTitle) and server name (what you call stardogServer) in the connection configuration to point to your installation.

https://gist.github.com/jbalint/80b5e27471b2b4812c74bc891f9d5827

Best,

Jess

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[Becky Tauber]

Hi again -

I tried to run just that example and got the same error. The normal Connection was fine again.

Thanks

- Becky

[Jess Balint]

Can you show the output of: echo $CLASSPATH?

Jess

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[Becky Tauber]

I don't have the CLASSPATH set in my .bash_profile but I'm using Eclipse. I'm using gradle build and have the following compiled in my dependencies:

    compile "com.complexible.stardog:client-http:$stardogVersion"

    compile "com.complexible.stardog:server:$stardogVersion"

I also tried adding the jars that you specified manually to my build path in Eclipse from the Stardog files I have downloaded. I'm using Spring so I also have stardog-spring-4.1.jar added as so:

    compile fileTree(dir: "lib-stardog", include: "*.jar")

[Jess Balint]

Becky,

BITES is available starting in Stardog version 4.2. Is this the version you are using?

Jess

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[Becky Tauber]

So it looks like I had 4.1~. I changed the version to 4.2, then cleaned and did a build. Upon running it again, I got the same 'view implementation' exception.

Thanks

- Becky

[Jess Balint]

Hi Becky,

It looks like the BITES dependency was missing from the "com.complexible.stardog:client-http:4.2" module. I fixed this in our Maven repository. If you clear your Gradle Maven cache and rerun your Gradle build, you should be good to go.

Jess

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[Becky Tauber]

Thank you!

Is it still version 4.2? I cleared everything and re-ran build but still got the same error when I tried to run the app.

- Becky

[Jess Balint]

It is still version 4.2. Here is the command I ran on my system to clear the caches:

rm -rf ~/.gradle/caches/modules-2/files-2.1/com.complexible.stardog/client-http/4.2 ~/.gradle/caches/modules-2/metadata-2.21/descriptors/com.complexible.stardog/client-http/4.2

I'm not sure if the paths will be exactly the same for you, but you can search for the "client-http/4.2" directories and remove the contents.

Jess

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[Becky Tauber]

It worked, thanks! I thought it was enough to run gradle clean & gradle build but I wasn't thinking that it was the same version. As soon as I deleted the files and built it, it was fine.

- Becky

[Jess Balint]

Glad it's working Becky. Please let us know if you have any further questions or feedback regarding BITES.

Best,

Jess

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[Becky Tauber]

Hey again Jess,

So the StardocsConnection was working great on Friday, but for some reason it's back to those same errors again. I performed the same steps to clear the caches and then downloaded the jars through a gradle build again (4.2), just in case something got mixed up.

I didn't change anything in my code so I'm not sure what would have caused this.

Thanks for your help!
Becky

[Jess Balint]

Are you running your application through Gradle?

Jess

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[Becky Tauber]

Eclipse with Buildship Gradle Integration plug in (Gradle project). I'm using Spring as well, not sure if that matters as far as this goes.