Kustvakt is a user and policy management component for KorAP (Diewald et al., 2016). It manages user access to resources (i.e. corpus data) that is typically bound with some licensing schemes. The licensing schemes of the IDS resources provided through KorAP (DeReKo) are very complex involving the access location and purposes (Kupietz & Lüngen, 2014). To manage user access to resources, Kustvakt performs query rewriting with document restrictions (Bański et al., 2014).
Kustvakt acts as a middleware in KorAP binding other components, such as Koral a query serializer and Krill a search component, together. As KorAP's API provider, it provides services, e.g. searching and retrieving annotation data of a match/hit, that can be used by a client, e.g. Kalamar (a KorAP web user interface) and KorapSRU (the CLARIN FCS endpoint for KorAP).
Versions
Kustvakt lite version
provides basic search and match info services without user and policy management.
Kustvakt full version
provides user and policy management and extended services (e.g. resource and annotation services) in addition to the basic services. This version requires a database (Sqlite is provided) and an LDAP system for user authentication.
Prerequisites
Jdk 1.7, Git, Maven 3, MySQL (optional).
Setup
Clone the latest version of Kustvakt
Since Kustvakt requires Krill and Koral, please install Krill and Koral in your maven local repository. Adjust the versions of Krill and Koral in Kustvakt/core/pom.xml according to the versions in Koral/pom.xml and Krill/pom.xml.
Install Kustvakt-core in your maven local repository
Packaging Kustvakt full version
The jar file is located in the target/ folder.
Packaging Kustvakt lite version
The jar file is located in the target/ folder.
If there are errors regarding tests, please skip the tests.
Setting kustvakt configuration file
Copy the default Kustvakt configuration file (e.g. full/src/main/resources/kustvakt.conf or lite/src/main/resources/kustvakt-lite.conf), to the same folder as the Kustvakt jar files (/target). Please do not change the name of the configuration file.
Set krill.indexDir in the configuration file to the location of your Krill index (relative path). In Kustvakt root directory, there is a sample index, e.g.
Set the location of the ldap configuration file for Kustvakt full version. The file should contain an admin password to access an LDAP system.
Optional custom configuration
Changing Kustvakt server port and host
Changing Kustvakt service base URI
By default, Kustvakt service base URI refers to /api/*
Running Kustvakt Server
Requires kustvakt.conf or kustvakt-lite.conf in the same folder as the jar file. Otherwise assuming sample-index located in the parent directory of the jar file.
Kustvakt full version requires an LDAP configuration file containing an admin password to access an LDAP system.
Futher Setup for Developer
For working with an IDE, you need to install lombok for your tool. Go to the directory of your lombok.jar, e.g .m2\repository\org\projectlombok\lombok\1.16.6 and run
Restart your IDE and clean your project.
Copy kustvakt.conf or kustvakt-lite.conf from src/main/resources to the full/ or lite folder. Then the properties in the kustvakt.conf or kustvakt-lite.conf file can be customized.
In an IDE, you can run KustvaktLiteServer or KustvaktServer as a normal Java application.
Changing Database
The default Sqlite database can be switch to a MySQL database.
Copy the jdbc.properties from full/src/main/resources to the full/ directory. Do not change the filename.
Remove or comment the Sqlite Setting.
Uncomment the MySQL Setting and fill in the correct values for the jdbc.url, jdbc.username and jdbc.password.
Save.
You probably would like to git ignore this file to prevent pushing the password to github.
Open full/src/main/resource/default-config.xml and search for the Spring bean with id="flyway".
Change the dataSource property to refer to the Spring bean with id="dataSource".
While running KustvaktServer or Kustvakt-full-[version].jar, MySQL tables will be created to the specified database from the SQL files in full/src/main/resources/db/new-mysql.
Known issues
Tests are verbose - this is no indication for an error.
Usage
Kustvakt service base URI runs by default at
Examples
Search
Retrieve match annotation information
Examples of services in full version only
Retrieve descriptions of all supported annotation layers.
Retrieve annotation descriptions of a list of foundries (POST request).
Retrieve descriptions of free resources.
Publication
Diewald, Nils/Hanl, Michael/Margaretha, Eliza/Bingel, Joachim/Kupietz, Marc/Bański, Piotr/Witt, Andreas (2016): KorAP Architecture – Diving in the Deep Sea of Corpus Data. In: Calzolari, Nicoletta/Choukri, Khalid/Declerck, Thierry/Goggi, Sara/Grobelnik, Marko/Maegaard, Bente/Mariani, Joseph/Mazo, Helene/Moreno, Asuncion/Odijk, Jan/Piperidis, Stelios (Hrsg.): Proceedings of the Tenth International Conference on Language Resources and Evaluation (LREC 2016), Portorož, Slovenia. Paris: European Language Resources Association (ELRA), 2016. S. 3586-3591.
Bański, Piotr/Diewald, Nils/Hanl, Michael/Kupietz, Marc/Witt, Andreas (2014): Access Control by Query Rewriting. The Case of KorAP. In: Proceedings of the Ninth Conference on International Language Resources and Evaluation (LREC’14). European Language Resources Association (ELRA), 2014. S. 3817-3822.
References
Kupietz, Marc/Lüngen, Harald (2014): Recent Developments in DeReKo. In: Calzolari, Nicoletta et al. (eds.): Proceedings of the Ninth International Conference on Language Resources and Evaluation (LREC'14). Reykjavik: ELRA, 2378-2385.