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From: vasia <git@git.apache.org>
To: issues@flink.incubator.apache.org
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References: <git-pr-408-flink@git.apache.org>
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Subject: [GitHub] flink pull request: [FLINK-1514][Gelly] Add a
 Gather-Sum-Apply ite...
Content-Type: text/plain
Message-Id: <20150224141603.C82D6E03FA@git1-us-west.apache.org>
Date: Tue, 24 Feb 2015 14:16:03 +0000 (UTC)

Github user vasia commented on a diff in the pull request:

    https://github.com/apache/flink/pull/408#discussion_r25254212
  
    --- Diff: flink-staging/flink-gelly/src/main/java/org/apache/flink/graph/example/GSASingleSourceShortestPathsExample.java ---
    @@ -0,0 +1,232 @@
    +/*
    + * 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.GraphAlgorithm;
    +import org.apache.flink.graph.Vertex;
    +import org.apache.flink.graph.example.utils.ExampleUtils;
    +import org.apache.flink.graph.gsa.ApplyFunction;
    +import org.apache.flink.graph.gsa.GatherFunction;
    +import org.apache.flink.graph.gsa.GatherSumApplyIteration;
    +import org.apache.flink.graph.gsa.SumFunction;
    +import org.apache.flink.util.Collector;
    +
    +import java.io.Serializable;
    +
    +/**
    + * This is an implementation of the Single Source Shortest Paths algorithm, using a gather-sum-apply iteration
    + */
    +public class GSASingleSourceShortestPathsExample implements ProgramDescription, GraphAlgorithm<Long, Double, Double> {
    --- End diff --
    
    Since it's not a library method, there's no need to implement GraphAlgorithm or have a run() method. You can move the body to main().


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