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https://issues.apache.org/jira/browse/FLINK-7?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14974343#comment-14974343
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ASF GitHub Bot commented on FLINK-7:
------------------------------------
Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/1255#discussion_r43004130
--- Diff:
flink-java/src/main/java/org/apache/flink/api/java/functions/AssignRangeIndex.java
---
@@ -0,0 +1,88 @@
+/*
+ * 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.api.java.functions;
+
+import org.apache.flink.api.common.distributions.DataDistribution;
+import org.apache.flink.api.common.functions.RichMapPartitionFunction;
+import org.apache.flink.api.java.tuple.Tuple2;
+import org.apache.flink.configuration.Configuration;
+import org.apache.flink.util.Collector;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * This mapPartition function require a DataSet with DataDistribution as
broadcast input, it read
+ * target parallelism from parameter, build partition boundaries with
input DataDistribution, then
+ * compute the range index for each record.
+ *
+ * @param <IN> The original data type.
+ * @param <K> The key type.
+ */
+public class AssignRangeIndex<IN, K extends Comparable<K>>
+ extends RichMapPartitionFunction<Tuple2<K, IN>, Tuple2<Integer, IN>> {
+
+ private List<K> partitionBoundaries;
+ private int numberChannels;
+
+ @Override
+ public void open(Configuration parameters) throws Exception {
+ this.numberChannels =
parameters.getInteger("TargetParallelism", 1);
+ }
+
+ @Override
+ public void mapPartition(Iterable<Tuple2<K, IN>> values,
Collector<Tuple2<Integer, IN>> out) throws Exception {
+
+ List<Object> broadcastVariable =
getRuntimeContext().getBroadcastVariable("DataDistribution");
+ if (broadcastVariable == null || broadcastVariable.size() != 1)
{
--- End diff --
You can move the broadcast variable initialization into the open method.
> [GitHub] Enable Range Partitioner
> ---------------------------------
>
> Key: FLINK-7
> URL: https://issues.apache.org/jira/browse/FLINK-7
> Project: Flink
> Issue Type: Sub-task
> Components: Distributed Runtime
> Reporter: GitHub Import
> Assignee: Chengxiang Li
> Fix For: pre-apache
>
>
> The range partitioner is currently disabled. We need to implement the
> following aspects:
> 1) Distribution information, if available, must be propagated back together
> with the ordering property.
> 2) A generic bucket lookup structure (currently specific to PactRecord).
> Tests to re-enable after fixing this issue:
> - TeraSortITCase
> - GlobalSortingITCase
> - GlobalSortingMixedOrderITCase
> ---------------- Imported from GitHub ----------------
> Url: https://github.com/stratosphere/stratosphere/issues/7
> Created by: [StephanEwen|https://github.com/StephanEwen]
> Labels: core, enhancement, optimizer,
> Milestone: Release 0.4
> Assignee: [fhueske|https://github.com/fhueske]
> Created at: Fri Apr 26 13:48:24 CEST 2013
> State: open
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