Difference between revisions of "MapReduce Reducer Assignment"
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| Line 1: | Line 1: | ||
=Motivation= | =Motivation= | ||
Collector is fundamental to the MapReduce Framework lab. | Collector is fundamental to the MapReduce Framework lab. | ||
| + | |||
| + | =Motivation= | ||
| + | Learn about Collector before we dig into the MapReduce Lab. | ||
=Background= | =Background= | ||
| − | [https://docs.oracle.com/javase/8/docs/api/java/util/stream/Collector.html Collector<T,A,R>] | + | [https://docs.oracle.com/javase/8/docs/api/java/util/stream/Collector.html interface Collector<T,A,R>] |
| + | |||
| + | [https://commons.apache.org/proper/commons-lang/apidocs/org/apache/commons/lang3/mutable/MutableInt.html class MutableInt] | ||
| + | |||
| + | =Code To Implement= | ||
| + | ==ClassicReducer== | ||
| + | {{CodeToImplement|ClassicReducer|supplier,accumulator,combiner|mapreduce.collector.studio}} | ||
| + | |||
| + | ==IntSumCollector== | ||
| + | {{CodeToImplement|IntSumCollector|supplier,accumulator,combiner,finisher|mapreduce.collector.intsum.studio}} | ||
=Testing Your Solution= | =Testing Your Solution= | ||
==Correctness== | ==Correctness== | ||
{{TestSuite|CollectorStudioTestSuite|mapreduce}} | {{TestSuite|CollectorStudioTestSuite|mapreduce}} | ||
Revision as of 03:12, 22 February 2018
Contents
Motivation
Collector is fundamental to the MapReduce Framework lab.
Motivation
Learn about Collector before we dig into the MapReduce Lab.
Background
Code To Implement
ClassicReducer
| class: | ClassicReducer.java |  |
| methods: | supplier,accumulator,combiner | |
| package: | mapreduce.collector.studio | |
| source folder: | student/src/main/java |
IntSumCollector
| class: | IntSumCollector.java | |
| methods: | supplier,accumulator,combiner,finisher | |
| package: | mapreduce.collector.intsum.studio | |
| source folder: | student/src/main/java |
Testing Your Solution
Correctness
| class: | CollectorStudioTestSuite.java |  |
| package: | mapreduce | |
| source folder: | testing/src/test/java |
