Github user andralungu commented on a diff in the pull request:
https://github.com/apache/flink/pull/765#discussion_r31678387
--- Diff:
flink-staging/flink-gelly/src/main/java/org/apache/flink/graph/example/HITSExample.java
---
@@ -0,0 +1,131 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.flink.graph.example;
+
+import org.apache.flink.api.common.ProgramDescription;
+import org.apache.flink.api.common.functions.FlatMapFunction;
+import org.apache.flink.api.common.functions.MapFunction;
+import org.apache.flink.api.java.DataSet;
+import org.apache.flink.api.java.ExecutionEnvironment;
+import org.apache.flink.graph.Edge;
+import org.apache.flink.graph.Graph;
+import org.apache.flink.graph.Vertex;
+import org.apache.flink.graph.library.HITS;
+import org.apache.flink.graph.utils.Hits;
+import org.apache.flink.graph.utils.Tuple3ToEdgeMap;
+import org.apache.flink.util.Collector;
+
+/**
+ * This program is an example for HITS algorithm.
+ * the result is either a hub value or authority value base user selection.
+ *
+ * If no arguments are provided, the example runs with a random graph of
10 vertices
+ * and random edge weights.
+ */
+
+public class HITSExample implements ProgramDescription {
+ @SuppressWarnings("serial")
+ public static void main(String[] args) throws Exception {
+
+ if(!parseParameters(args)) {
+ return;
+ }
+
+ ExecutionEnvironment env =
ExecutionEnvironment.getExecutionEnvironment();
+ DataSet<Edge<Long, String>> links = getEdgesDataSet(env);
+
+ Graph<Long, Double, String> network = Graph.fromDataSet(links, new
MapFunction<Long, Double>() {
+
+ public Double map(Long value) throws Exception {
+ return 1.0;
+ }
+ }, env);
+
+ // add graph to HITS class with iteration value and hub or authority
enum value.
+ DataSet<Vertex<Long, Double>> HitsValue =network.run(
+ new
HITS<Long>(Hits.AUTHORITY,maxIterations)).getVertices();
+
+ if (fileOutput) {
+ HitsValue.writeAsCsv(outputPath, "\n", "\t");
+ } else {
+ HitsValue.print();
+ }
+// env.execute("HITS algorithm");
+ }
+
+ @Override
+ public String getDescription() {
+ return "HITS algorithm example";
+ }
+
+ //
*************************************************************************
+ // UTIL METHODS
+ //
*************************************************************************
+
+ private static boolean fileOutput = false;
+ private static long numPages = 10;
+ private static String edgeInputPath = null;
+ private static String outputPath = null;
+ private static int maxIterations = 5;
+
+ private static boolean parseParameters(String[] args) {
+
+ if(args.length > 0) {
+ if(args.length != 3) {
+ System.err.println("Usage: PageRank <input edges path>
<output path> <num iterations>");
--- End diff --
It's no longer Page Rank ;) let's not confuse people!
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