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https://issues.apache.org/jira/browse/FLINK-1526?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14337711#comment-14337711
]
ASF GitHub Bot commented on FLINK-1526:
---------------------------------------
Github user hsaputra commented on a diff in the pull request:
https://github.com/apache/flink/pull/434#discussion_r25399902
--- Diff:
flink-staging/flink-gelly/src/main/java/org/apache/flink/graph/library/MinSpanningTree.java
---
@@ -0,0 +1,388 @@
+/*
+ * 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.library;
+
+import org.apache.flink.api.common.functions.CoGroupFunction;
+import org.apache.flink.api.common.functions.FlatMapFunction;
+import org.apache.flink.api.common.functions.FlatJoinFunction;
+import org.apache.flink.api.common.functions.MapFunction;
+import org.apache.flink.api.common.functions.RichFilterFunction;
+import org.apache.flink.graph.Edge;
+import org.apache.flink.graph.Graph;
+import org.apache.flink.graph.GraphAlgorithm;
+import org.apache.flink.api.java.DataSet;
+import org.apache.flink.api.java.operators.IterativeDataSet;
+import org.apache.flink.api.java.tuple.Tuple2;
+import org.apache.flink.api.java.tuple.Tuple3;
+import org.apache.flink.api.java.tuple.Tuple6;
+import org.apache.flink.configuration.Configuration;
+import org.apache.flink.graph.example.utils.ConvergenceDetectionAggregator;
+import org.apache.flink.types.BooleanValue;
+import org.apache.flink.util.Collector;
+
+import java.util.Iterator;
+
+@SuppressWarnings("serial")
+public class MinSpanningTree implements GraphAlgorithm<Long, String,
Double> {
--- End diff --
Could you add Javadoc description of what this class does and relationships
to other classes?
> Add Minimum Spanning Tree library method and example
> ----------------------------------------------------
>
> Key: FLINK-1526
> URL: https://issues.apache.org/jira/browse/FLINK-1526
> Project: Flink
> Issue Type: Task
> Components: Gelly
> Reporter: Vasia Kalavri
> Assignee: Andra Lungu
>
> This issue proposes the addition of a library method and an example for
> distributed minimum spanning tree in Gelly.
> The DMST algorithm is very interesting because it is quite different from
> PageRank-like iterative graph algorithms. It consists of distinct phases
> inside the same iteration and requires a mechanism to detect convergence of
> one phase to proceed to the next one. Current implementations in
> vertex-centric models are quite long (>1000 lines) and hard to understand.
> You can find a description of the algorithm [here |
> http://ilpubs.stanford.edu:8090/1077/3/p535-salihoglu.pdf] and [here |
> http://www.vldb.org/pvldb/vol7/p1047-han.pdf].
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