Play around w/ rdf4j

graphdb/graphcli/src/main/java/me/schaertl/graphcli/Main.java

 package me.schaertl.graphcli;
 
-import org.eclipse.rdf4j.model.Resource;
-import org.eclipse.rdf4j.model.impl.TreeModel;
-import org.eclipse.rdf4j.model.vocabulary.RDF;
 import org.eclipse.rdf4j.repository.Repository;
 import org.eclipse.rdf4j.repository.RepositoryConnection;
-import org.eclipse.rdf4j.repository.config.RepositoryConfig;
-import org.eclipse.rdf4j.repository.config.RepositoryConfigSchema;
-import org.eclipse.rdf4j.repository.manager.LocalRepositoryManager;
 import org.eclipse.rdf4j.repository.manager.RemoteRepositoryManager;
 import org.eclipse.rdf4j.repository.manager.RepositoryManager;
-import org.eclipse.rdf4j.rio.RDFFormat;
-import org.eclipse.rdf4j.rio.RDFParser;
-import org.eclipse.rdf4j.rio.Rio;
-import org.eclipse.rdf4j.rio.helpers.StatementCollector;
 
-import java.io.File;
 import java.io.IOException;
-import java.io.InputStream;
 
 public class Main {
     private static void hello() throws IOException {
         // Code taken from http://graphdb.ontotext.com/documentation/standard/using-graphdb-with-the-rdf4j-api.html
+        //
+        // XXX: This code has bad error handling. The API isn't helpful, but in production code
+        // I would never do such things.
 
         // Instantiate a local repository manager and initialize it
         final RepositoryManager repositoryManager = new RemoteRepositoryManager("http://rdf:7200");
-        repositoryManager.initialize();
+        repositoryManager.init();
 
-        // Instantiate a repository graph model
-        // final TreeModel graph = new TreeModel();
-
-        // Read repository configuration file
-        // InputStream config = EmbeddedGraphDB.class.getResourceAsStream("/repo-defaults.ttl");
-        // RDFParser rdfParser = Rio.createParser(RDFFormat.TURTLE);
-        // rdfParser.setRDFHandler(new StatementCollector(graph));
-        // rdfParser.parse(config, RepositoryConfigSchema.NAMESPACE);
-        // config.close();
-
-        // Retrieve the repository node as a resource
-        // Resource repositoryNode = GraphUtil.getUniqueSubject(graph, RDF.TYPE, RepositoryConfigSchema.REPOSITORY);
-
-        // Create a repository configuration object and add it to the repositoryManager
-        // RepositoryConfig repositoryConfig = RepositoryConfig.create(graph, repositoryNode);
-        // repositoryManager.addRepositoryConfig(repositoryConfig);
-
-        // Get the repository from repository manager, note the repository id set in configuration .ttl file
         final Repository repository = repositoryManager.getRepository("chem");
+        if (repository == null) {
+            throw new IOException("no such repository");
+        }
 
         // Open a connection to this repository
         final RepositoryConnection repositoryConnection = repository.getConnection();
@@ -60,6 +36,5 @@ public class Main {
 
     public static void main(String[] args) throws IOException {
         Main.hello();
-        System.out.println("done running the program");
     }
 }