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From vasia <...@git.apache.org>
Subject [GitHub] flink pull request: [FLINK-2044] [gelly] Implementation of Gelly H...
Date Wed, 11 May 2016 12:30:39 GMT
Github user vasia commented on a diff in the pull request:

    --- Diff: flink-libraries/flink-gelly/src/main/java/org/apache/flink/graph/library/HITSAlgorithm.java
    @@ -0,0 +1,182 @@
    + * 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.aggregators.DoubleSumAggregator;
    +import org.apache.flink.api.common.functions.MapFunction;
    +import org.apache.flink.api.java.DataSet;
    +import org.apache.flink.api.java.tuple.Tuple2;
    +import org.apache.flink.graph.Edge;
    +import org.apache.flink.graph.EdgeDirection;
    +import org.apache.flink.graph.Graph;
    +import org.apache.flink.graph.GraphAlgorithm;
    +import org.apache.flink.graph.Vertex;
    +import org.apache.flink.graph.spargel.MessageIterator;
    +import org.apache.flink.graph.spargel.MessagingFunction;
    +import org.apache.flink.graph.spargel.ScatterGatherConfiguration;
    +import org.apache.flink.graph.spargel.VertexUpdateFunction;
    +import org.apache.flink.graph.utils.NullValueEdgeMapper;
    +import org.apache.flink.types.DoubleValue;
    +import org.apache.flink.types.NullValue;
    +import org.apache.flink.util.Preconditions;
    + * This is an implementation of HITS algorithm, using a scatter-gather iteration.
    + * The user can define the maximum number of iterations. HITS algorithm is determined
by two parameters,
    + * hubs and authorities. A good hub represented a page that pointed to many other pages,
and a good authority
    + * represented a page that was linked by many different hubs. The implementation assumes
that the two value on
    --- End diff --
    represented => represents
    pointed => points
    was linked => is linked
    the two value => the two values*

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