About

Litef is a semantic indexer and the Data API service for Cendari project.

Building

You need CKAN and Virtuoso systems already installed.

In order to build and run litef-conductor, you need Java 1.7.x, Scala 2.10.4 and SBT.

In order to compile, you can use the sbt compile command, for starting the service, execute sbt reStart.

Environment requisites

If you have plans to use a non local CKAN/PostgreSQL and Virtuoso, you need to forward the necessary ports to your local system through an SSH tunnel.

You should copy the PROJECTDIR/src/main/resources/application.conf-example to PROJECTDIR/application.conf and adjust it accordingly. Do not commit the config file to the respository and do not package it in the assembly jar file.

When starting the application with reStart, it will start the server using that configuration file.

If you start the server manually from the assembly jar file, you need to pass the -Dconfig.file=PROJECTDIR/application.conf argument manually.

Data location

Indexer needs to be able to access CKAN files directly (litef.ckan.localStoragePrefix), so you need to have a local ckan installation, or to use sshfs. Also, it needs to be able to create and write into the directory specified in litef.indexer.localStoragePrefix.

You need to add the litef.indexer.localStoragePrefix path to the DirsAllowed variable in virtuoso.ini

In order not to have collisions between the main server and a local instance (in the case where you use the main server's databases and files), you need to create a local file /opt/litef/conductor:disable-document-processing before starting the local service.

Packaging

For the production environments, the sbt assembly command is provided. It builds a single jar file that contains all the libraries and litef.

For quicker deployment, but more involved maintainance, you can use the sbt package command and maintain the libraries manually. If you need to collect all the libraries, use sbt oneJar and extract the library jar files to the runtime classpath.