Lyo/BuildLDPSample

Building and Running the LDP reference implementation in Eclipse

The Lyo LDP sample is a Java implementation of the W3C Linked Data Platform 1.0 Candidate Recommendation using JAX-RS (Apache CXF) and Jena TDB. It is meant to be a reference implementation, but could be the basis for real LDP servers.

See the Lyo LDP Implemntation Report for capabilities and conformance.

Prerequisites

See Lyo/prereqs.

LDP Sample Application runtimes

The LDP reference implementation uses a Jetty app server as the default runtime.

Note: If you're running these examples on Windows, make sure you don't have spaces in your workspace path. The samples might not launch.

Clone the Lyo LDP git repositories

This example assumes EGit is being used

• Open the Git Repositories view in Eclipse and click the Clone Git Repository icon
• Use git://git.eclipse.org/gitroot/lyo/org.eclipse.lyo.ldp.git as the URI (browse it also on line). User/Password are not required.

• On the Branch Selection page, select the master branch
• On the Local Destination page, specify a location or accept the default and click Finish

The repository should now show up in your Git Repositories view

Import the LDP reference implementation projects from the git repository

• In the Git Repositories view, right click org.eclipse.lyo.ldp and select Import Projects
• Select the Import Existing Projects wizard and click next
• Select the projects:
  • org.eclipse.lyo.ldp.build
  • org.eclipse.lyo.ldp.sample.loaders
  • org.eclipse.lyo.ldp.server
  • org.eclipse.lyo.ldp.server.jena
  • org.eclipse.lyo.ldp.webapp

Build all projects

To build the projects.

• Expand the org.eclipse.lyo.ldp.build project
• Right click pom.xml -> Run As -> Maven clean
• Right click pom.xml -> Run As -> Maven install
• IBM JVM/JRE Users: There is an issue with m2eclipse and the the IBM JRE. If you have see the error java.lang.NoClassDefFoundError: org.slf4j.impl.StaticLoggerBinder when running a Maven install, you need to copy a newer slf4j api jar into your JRE directory to work around the issue until it is fixed:
  • Download slf4j-1.6.2.zip and extract the zip.
  • copy slf4j-api-1.6.2.jar from the slf4j distribution to the JAVA_HOME\jre\lib\ext directory
  • See https://bugs.eclipse.org/bugs/show_bug.cgi?id=338252 if you are interested in the details

Run the LDP samples

• Go to Run->Run Configurations
• Expand the Maven Build section
• Select Launch LDP Server and click Run
• Test that the server is running by going to this URL in the web browser: http://localhost:8080/ldp

NOTE: The LDP Server now supports Basic Authentication, and needs to run with the following default username ldpuser and password ldpuser.

Building and Running the LDP reference implementation from Command Line

• Fetch the source code

$ git clone http://git.eclipse.org/gitroot/lyo/org.eclipse.lyo.ldp.git

• Step into source directory

$ cd org.eclipse.lyo.ldp

• Build the source

$ mvn -f org.eclipse.lyo.ldp.build/pom.xml install 

• Run the server (not it runs in the foreground process, so you may want to bg it)

$ mvn -f org.eclipse.lyo.ldp.webapp/pom.xml jetty:run

• Start using it, load URL in browser or

$ curl -u ldpuser:ldpuser http://localhost:8080/ldp/resources

References

• LDP implementation (progress and details)
• W3C **Official** Test Suite on github
• LDP Test Suite (exploration)