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A publicly-accessible SPARQL endpoint may needs to be installed.  It takes the form of an additional repository which contains everything in the main repository which is public (i.e. not email-addresses, phone-numbers, etc.; not un-published resources).  It is affectionately known as the "sparqler" associated with this main repository.  It is synchronized with its main repository on a regular basis - typically every night.

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The installation of a sparqler follows very much the same procedure as for the main repository, with one or two changes because it doesn't live at the same location.  The quick-start installation procedure is as follows - additional additional details are  are the same as for the main repository.

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1. In the existing eagle-i home directory

   (the parent of the repository home-directory

   ,

   ${REPO_HOME})

   create a directory

   "sparqler", and set an environmental variable ${SPARQLER_HOME}.  

   named sparqler. For example, if

   the repository home

   your eagle-i home directory is /opt/eaglei

   /repo, then the sparqler home would be

   , you should be creating /opt/eaglei/sparqler.

   Code Block
   language bash title create sparqler home directory
   hms-mbp:eaglei user$ mkdir /sparqler

2. Create an environment variable for the sparqler home directory, ${SPARQLER_HOME}. For example:

   Code Block
   language bash title define environment variable for sparqler home directory
   SPARQLER_HOME=/opt/eaglei/sparqler

   .

3. Copy the

   file

   file ${REPO_HOME}/webapps/sparqler.war

   to

    to Tomcat's webapps directory. 

   Code Block
   language bash title copy sparqler.war
   hms-mbp:eaglei user$ cp ${REPO_HOME}/webapps/sparqler.war /opt/tomcat7/webapps

4. Add an additional system property

   to

   to catalina.properties:

...

1. Code Block
   language bash title catalina.properties

1. org.eaglei.sparqler.home=/opt/eaglei/sparqler

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2. Run the

   script

   script ${REPO_HOME}/etc/prepare-install.sh

   with

    with an additional argument: "sparqler-users.derby" (note that the username and password for the user you create here - who administers the sparqler - these should be different from the main repository's admin-user credentials):

   Code Block
   language bash title run prepare-install.sh
   hms-mbp:eaglei user$
   No Format
   bash ${REPO_HOME}/etc/prepare-install.sh SPARQLER_USERNAME SPARQLER_PASSWORD ${REPO_HOME} sparqler-users.derby

3. Create and edit

   Copy the repository configuration file

   (

   to ${SPARQLER_HOME}.

   Code Block
   language bash title copy configuration file
   hms-mbp:eaglei user$ cp ${REPO_HOME}/configuration.properties ${SPARQLER_HOME}/configuration.properties

4. Edit the newly created SPARQLER configuration file by changing the following two properties:

   Code Block
   language bash title $\{SPARQLER_HOME\}/configuration.properties

   ) - it should be identical to the main repository's config-file, with the following two exceptions - we set:

   No Format
   eaglei.repository.sesame.dir=${sys:org.eaglei.sparqler.home}/sesame eaglei.repository.log.dir=${sys:org.eaglei.sparqler.home}/logs

5. Add two properties to your eagle-i-apps.properties file to define the source and target repositories: 

   Code Block
   language bash title $\{EAGLEI_HOME\}/conf/eagle-i-apps.properties
   eaglei.sparqler.source.URL=https://localhost:8443/ eaglei.sparqler.target.URL=https://localhost:8443/sparqler/

6. Add credentials to the eagle-i-apps-credentials.properties file for access to the source and target repositories: 

   Code Block
   language bash title

7. Start up Tomcat

8. $\{EAGLEI_HOME\}/.config/eagle-i-apps-credentials.properties

   # The credentials for the source repository eaglei.sparqler.source.user=myRepositoryUser eaglei.sparqler.source.password=myRepositoryPassword   # The credentials used by the prepare-install.sh above eaglei.sparqler.target.user=mySparqlerUser eaglei.sparqler.target.password=mySparqlerPassword

9. Start up tomcat
10. Run the script

    Run the script 

    ${REPO_HOME}/etc/finish-install.sh, using the same sparqler-admin username and password that you set up in step

    1

    5, above, when you ran the "prepare-install.sh": 

    Code Block
    language bash title run finish-install.sh
    hms-mbp:eaglei user$
    No Format
    bash ${REPO_HOME}/etc/finish-install.sh SPARQLER_USERNAME SPARQLER_PASSWORD https://localhost:8443/sparqler

Synchronization

The sparqler repository keeps itself up-to-date with its source-repository by running a nightly synchronization process.  This is run automatically so long as the sparlqer and its source-repository are running - no intervention is required.

However, if for some reason the synchronization fails (look in sparqler/logs/repository.log), you can run the synchronizer manually by invoking the script ${REPO_HOME}/etc/synchronize-sparqler.sh as follows:

...

1. /

...

1. sparqler

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