LdesMemberSeeder4J

Purpose of this application

As part of the development of the LdesServer4J by the VSDS team, we have to test our server from time to time by seeding it with (a lot of) LDES members. Therefore, this application has been developed, which makes the seeding simpler and more customizable.

How to run

Configuration properties

This application is very customizable via the following properties.

Note

All the properties are prefixed by member-seeder

Property	Description	Required	Default	Example	Supported values
member-template	File name or path to the template to use for seeding the members	true	NA	example-member.ttl	Relative and absolute file paths
boundaries.inclusive-start	Inclusive start where the seeder can start, this will be used in the id or subject of a member. This property can come in handy when the application is ran multiple times after each other	false	0	100	Integer value
boundaries.exclusive-end	Exclusive end where the seeder must stop seeding members	false	10000	2000	Integer value
ldes-server.host	Host where the LDES server is running	false	http://localhost:8080	http://localhost:8080	HTTP and HTTPS URLs
ldes-server.collection	Name of the event stream collection that is running on the LDES server	true	NA	event-stream	String
ldes-server.rdf-format	Format in which the member must be sent to the LDES server	false	application/n-quads	text/turtle	Any type supported by Apache Jena
state-object-seeding.enabled	Flag that indicates whether state objects or version object must be used	false	false	true	Boolean value
state-object-seeding.number-of-members	Number of state members that will be sent in batch to the LDES server	false	10	25	Integer value

Example config

member-seeder:
  member-template: examples/simple-state-object.nq
  ldes-server:
    collection: event-stream
  boundaries:
    inclusive-start: 0
    exclusive-end: 10000
  state-object-seeding:
    enabled: true
    number-of-members: 100

Docker

Currently, there is no Docker image available yet.

Run locally via Maven

Requirements:

• Java 21

If the project is not pulled on your system yet: execute:

git clone https://github.com/jobulcke/LdesMemberSeeder4J.git
cd ./LdesMemberSeeder4J

To run the application: execute the following command

./mvnw spring-boot:run

Credits

A special thank-you goes here to Wouter Lefever, who wrote the very first version of this application, where most of this code is based on.