org.neo4j.io.fs.FileUtils Java Examples

public static void main(String[] args) throws Exception {
    FileUtils.deleteRecursively(new File(STORE_DIR));
    long time = System.currentTimeMillis();
    Rules rules = new Rules(); // asList("titles")
    new DatabaseImporter("jdbc:mysql://localhost:3306/northwind?user=root", "northwind", STORE_DIR, rules).run();
    long delta = (System.currentTimeMillis() - time) / 1000;
    String result = importInfo();
    System.out.println(result + " in " + delta + " seconds");
}
 

public static void main(String[] args) throws Exception {
    FileUtils.deleteRecursively(new File(STORE_DIR));
    long time = System.currentTimeMillis();
    new DatabaseImporter("jdbc:mysql://localhost:3306/sakila?user=root", "sakila", STORE_DIR, new Rules()).run();

    long delta = (System.currentTimeMillis() - time) / 1000;
    String result = importInfo();
    System.out.println(result + " in " + delta + " seconds");
}
 

public static void main(String[] args) throws Exception {
    FileUtils.deleteRecursively(new File(STORE_DIR));
    StopWatch watch = new StopWatch();
    Rules rules = new Rules(); // asList("titles")
    new DatabaseImporter("jdbc:mysql://localhost:3306/employees?user=root", "employees", STORE_DIR, rules).run();

    watch.lap("import");
    System.err.println(watch.stop("import", importInfo()));
}
 

public static void main(String[] args) throws Exception {
    setupDatabase();

    FileUtils.deleteRecursively(new File(STORE_DIR));
    long time = System.currentTimeMillis();
    new DatabaseImporter("jdbc:derby:memory:test", null, STORE_DIR, new Rules()).run();

    String result = assertImport();
    System.out.println(result + " in " + (System.currentTimeMillis() - time) / 1000 + " seconds");
}
 

public static void main(String[] args) {
       String zipFile = "data/cineasts_12k_movies_50k_actors_2.1.6.zip";
       String path = "data/cineasts_12k_movies_50k_actors.db/";

       try {
           FileUtils.deleteRecursively(new File(path));
           extractFolder(zipFile);
       } catch (Exception e) {
           e.printStackTrace();
           System.exit(1);
       }

       long nodeCount, relsCount;
	
	// Open a database instance
       GraphDatabaseService g = new GraphDatabaseFactory()
               .newEmbeddedDatabaseBuilder(path)
               .setConfig(GraphDatabaseSettings.allow_store_upgrade, "true")
               .newGraphDatabase();
       try (Transaction tx = g.beginTx() ) {
		nodeCount = IteratorUtil.count( GlobalGraphOperations.at(g).getAllNodes() );
		relsCount = IteratorUtil.count( GlobalGraphOperations.at(g).getAllRelationships() );
		tx.success();
	}
	
	System.out.println("Node count: "+nodeCount);
       System.out.println("Rel count: " + relsCount);

       // Declare the GraphAlgoEngine on the database instance
	GraphAlgoEngine engine = new GraphAlgoEngine(g);
	if( args.length > 1 && args[1].equals("off") )
		engine.disableLogging();

       Louvain louvain = new Louvain(g);
       louvain.execute();
       LouvainResult result = louvain.getResult();
       for (int layer : result.layers()) {
           System.out.println("Layer " + layer + ": " + result.layer(layer).size() + " nodes");
       }

       LabelPropagation lp = new LabelPropagation();
       // Starts the algorithm on the given graph g
	engine.execute(lp);
	Long2LongMap communityMap = lp.getResult();
	long totCommunities = new LongOpenHashSet( communityMap.values() ).size();
       System.out.println("There are " + totCommunities + " communities according to Label Propagation");

	DirectedModularity modularity = new DirectedModularity(g);
	engine.execute(modularity);
       System.out.println("The directed modularity of this network is " + modularity.getResult());

       UndirectedModularity umodularity = new UndirectedModularity(g);
	engine.execute(umodularity);
       System.out.println("The undirected modularity of this network is " + umodularity.getResult());

       engine.clean(lp); // Now you can clean Label propagation results

       TriangleCount tc = new TriangleCount();
	engine.execute(tc);
	Long2LongMap triangleCount = tc.getResult();
	Optional<Long> totalTriangles = triangleCount.values().stream().reduce( (x, y) -> x + y );
	System.out.println("There are "+totalTriangles.get()+" triangles");

	PageRank pr = new PageRank(g);
	engine.execute(pr);
	Long2DoubleMap ranks = pr.getResult();
	engine.clean(pr);
	Optional<Double> res = ranks.values().parallelStream().reduce( (x, y) -> x + y );
	System.out.println("Check PageRank sum is 1.0: "+ res.get());

	ConnectedComponents cc = new ConnectedComponents();
	engine.execute(cc);
	Long2LongMap components = cc.getResult();
	engine.clean(cc);
	int totalComponents = new LongOpenHashSet( components.values() ).size();
	System.out.println("There are "+ totalComponents+ " different connected components");
	
	StronglyConnectedComponents scc = new StronglyConnectedComponents();
	engine.execute(scc);
	components = scc.getResult();
	engine.clean(scc);
	totalComponents = new LongOpenHashSet( components.values() ).size();
	System.out.println("There are "+ totalComponents+ " different strongly connected components");
	
	// Don't forget to shutdown the database
	g.shutdown();
}