Difference between revisions of " Blueprints API remote mode"

Latest revision as of 05:08, 21 October 2016

Note that Blazegraph 2.0.0 released an Apache TinkerPop™ 3 implementation.

Introduction

A sample Java application demonstrates using Blazegraph™ in remote mode with Blueprints. See Using Blueprints with Blazegraph tutorial for more details. This project was created in Eclipse IDE with Maven. You need to have a NanoSparqlServer running (see Quick Start instructions). Endpoint http://localhost:9999/blazegraph/ is used for remote repository connection in the application.

Download a sample application

You can download the sample-blueprints-remote application here.

Code listing

package sample.blueprints.remote;

import org.apache.log4j.Logger;

import com.bigdata.blueprints.BigdataGraph;
import com.bigdata.blueprints.BigdataGraphClient;
import com.tinkerpop.blueprints.Edge;
import com.tinkerpop.blueprints.Vertex;


public class SampleBlazegraphBlueprintsRemote {
	
	protected static final Logger log = Logger.getLogger(SampleBlazegraphBlueprintsRemote.class);

	public static void main(String[] args) throws Exception {
		
		final BigdataGraph graph = new BigdataGraphClient("http://localhost:9999/blazegraph/sparql");
		try {
			graph.loadGraphML(SampleBlazegraphBlueprintsRemote.class.getResource("/graph-example-1.xml").getFile());
			for (Vertex v : graph.getVertices()) {
				log.info(v);
			}
			for (Edge e : graph.getEdges()) {
				log.info(e);
			}
		} finally {
			graph.shutdown();
		}
	}
}

Comments

Create a repository

   final BigdataGraph graph = new BigdataGraphClient("http://localhost:9999/blazegraph/sparql");        

Load data

graph.loadGraphML(SampleBlazegraphBlueprintsRemote.class.getResource("/graph-example-1.xml").getFile());

Get data from a repository

               for (Vertex v : graph.getVertices()) {
			log.info(v);
		}
		for (Edge e : graph.getEdges()) {
			log.info(e);
		}

Program output

New service class org.openrdf.query.resultio.sparqljson.SPARQLResultsJSONWriterFactory replaces existing service class com.bigdata.rdf.rio.json.BigdataSPARQLResultsJSONWriterFactory
New service class org.openrdf.query.resultio.sparqljson.SPARQLResultsJSONParserFactory replaces existing service class com.bigdata.rdf.rio.json.BigdataSPARQLResultsJSONParserFactory
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