This chapter helps you to set up the logging functionality of OntoBroker. Follow the steps described below.

 

Note: For OntoBroker startup use a clean config directory (this means a new folder containing a ontoconfig file without any subdirectories)

 

1. Browse to the OntoBroker installation directory [ONTOBROKER -> conf -> auditing] and copy the contents of the "log4j.properties.obl.mixin" file.

2. Browse to [ONTOBROKER -> conf] and paste the contents of the "log4j.properties.obl.mixin" file into the "log4j.properties".

3. Comment the following lines:

# Enable event logging.

log4j.category.[EVENT]=DEBUG, auditing

log4j.additivity.[EVENT]=false

 

# To log user actions uncomment the following lines.

log4j.category.[USER_ACTION]=DEBUG, auditing

log4j.additivity.[USER_ACTION]=false

 

# Set up renderers.

log4j.renderer.org.semanticweb.kaon2.api.event.DatamodelEvent=com.ontoprise.util.logging.ObjectLogicDatamodelEventRenderer

log4j.renderer.com.ontoprise.util.logging.useraction.UserAction=com.ontoprise.util.logging.ObjectLogicUserActionRenderer

 

# Log to the file log/auditing.obl

log4j.appender.auditing=org.apache.log4j.RollingFileAppender

log4j.appender.auditing.MaxFileSize=5MB

log4j.appender.auditing.MaxBackupIndex=20

log4j.appender.auditing.layout=org.apache.log4j.PatternLayout

log4j.appender.auditing.layout.ConversionPattern=%m%n

log4j.appender.auditing.File=log/auditing.obl

 

4. Start the OntoBroker Admin Console in start-up mode "Collaboration Server" (the same user as the OS Collaboration user. The default is "Administrator").

5. Start OntoStudio and chose "Collaboration Server" as the storage type, set up a new project.

6. Execute the ping command in the OntoBroker Admin Console.

7. Create a new ontology (e.g. http://www.example.com/auditing) in your already existing project in OntoStudio (see step 5.).

8. Create a class "Person", set a property (name, range = string), and create an instance (e.g. value = Robert).

9. Delete the class "Person"

10. Create another new ontology (e.g. http://www.example.com/importedOntology)

11. Import the ontology from step 10. to the ontology created in step 7.

12. Create a class with a typo (e.g. Cra in place of Car) in http://www.example.com/importedOntology.

13. Rename the class "Cra" to "Car"

14. Delete the imported ontology in the http://www.example.com/auditing ontology.

15. Completely remove the http://www.example.com/importedOntology ontology (also from the repository).

16. Remove the whole project from OntoStudio (do not remove the ontologies from the repository in this case!).

17. Shut down OntoBroker

18. Create a new file-based project (e.g. auditing).

19. Import the log/auditing.obl ontology from the configuration  directory to the project created in step 18.

20. Import the "event-schema.obl" and "user-actions-schema.obl" ontologies from [ONTOBROKER -> conf -> auditing]

21. Import the "defaultModule" into the " event-schema.obl" ontology

22. Run the query "getDatamodelEvents"

23. Your result should look like the example in the screenshot below:

Note: All of the logged actions can be found as instances in the "dafaultModule" ontology!

 

Note: All logged actions can be found as instances in the "dafaultModule" ontology!