Github user vasia commented on a diff in the pull request:
https://github.com/apache/flink/pull/452#discussion_r26928420
--- Diff:
flink-staging/flink-gelly/src/main/java/org/apache/flink/graph/example/EuclideanGraphExample.java
---
@@ -0,0 +1,214 @@
+/*
+ * 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.MapFunction;
+import org.apache.flink.api.java.DataSet;
+import org.apache.flink.api.java.ExecutionEnvironment;
+import org.apache.flink.api.java.tuple.Tuple2;
+import org.apache.flink.api.java.tuple.Tuple3;
+import org.apache.flink.graph.Edge;
+import org.apache.flink.graph.Graph;
+import org.apache.flink.graph.Triplet;
+import org.apache.flink.graph.Vertex;
+import org.apache.flink.graph.example.utils.EuclideanGraphData;
+
+import java.io.Serializable;
+
+/**
+ * Given a directed, unweighted graph, with vertex values representing
points in a plan,
+ * return a weighted graph where the edge weights are equal to the
Euclidean distance between the
+ * src and the trg vertex values.
+ *
+ * <p>
+ * Input files are plain text files and must be formatted as follows:
+ * <ul>
+ * <li> Vertices are represented by their vertexIds and vertex
values and are separated by newlines,
+ * the value being formed of two doubles separated by a comma.
+ * For example: <code>1,1.0,1.0\n2,2.0,2.0\n3,3.0,3.0\n</code>
defines a data set of three vertices
+ * <li> Edges are represented by triples of srcVertexId,
srcEdgeId, weight which are
+ * separated by commas. Edges themselves are separated by
newlines. The initial edge value will be overwritten.
--- End diff --
Hey @andralungu! Sorry for not noticing this earlier, but why give a
weighted edge as input if you're going to override the weight anyway?
And in the beginning of the description, you refer to an unweighted graph.
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