Examples with Edge org.apache.flink.examples.java.graph.util.EnumTrianglesDataTypes.Edge used on opensource projects

Example 1 with Edge

use of org.apache.flink.examples.java.graph.util.EnumTrianglesDataTypes.Edge in project flink by apache.

the class EnumTriangles method main.

// *************************************************************************
//     PROGRAM
// *************************************************************************
public static void main(String[] args) throws Exception {
    // Checking input parameters
    final ParameterTool params = ParameterTool.fromArgs(args);
    // set up execution environment
    final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
    // make parameters available in the web interface
    env.getConfig().setGlobalJobParameters(params);
    // read input data
    DataSet<Edge> edges;
    if (params.has("edges")) {
        edges = env.readCsvFile(params.get("edges")).fieldDelimiter(" ").includeFields(true, true).types(Integer.class, Integer.class).map(new TupleEdgeConverter());
    } else {
        System.out.println("Executing EnumTriangles example with default edges data set.");
        System.out.println("Use --edges to specify file input.");
        edges = EnumTrianglesData.getDefaultEdgeDataSet(env);
    }
    // project edges by vertex id
    DataSet<Edge> edgesById = edges.map(new EdgeByIdProjector());
    DataSet<Triad> triangles = edgesById.groupBy(Edge.V1).sortGroup(Edge.V2, Order.ASCENDING).reduceGroup(new TriadBuilder()).join(edgesById).where(Triad.V2, Triad.V3).equalTo(Edge.V1, Edge.V2).with(new TriadFilter());
    // emit result
    if (params.has("output")) {
        triangles.writeAsCsv(params.get("output"), "\n", ",");
        // execute program
        env.execute("Basic Triangle Enumeration Example");
    } else {
        System.out.println("Printing result to stdout. Use --output to specify output path.");
        triangles.print();
    }
}