Last change
on this file since 166 was
166,
checked in by (none), 14 years ago
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HadoopA51: imported git repository from github
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File size:
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[166] | 1 | package ro.pub.cs.pp.a51hadoop.algorithm.testing; |
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| 2 | |
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| 3 | import ro.pub.cs.pp.a51hadoop.algorithm.HashReducer; |
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| 4 | import ro.pub.cs.pp.a51hadoop.algorithm.ReducerGenerator; |
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| 5 | |
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| 6 | |
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| 7 | /* |
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| 8 | * A generator for DigitReducer functors. |
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| 9 | * |
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| 10 | */ |
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| 11 | public class DigitReducerGenerator implements ReducerGenerator |
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| 12 | { |
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| 13 | |
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| 14 | /* |
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| 15 | * All logic implemented in the generate() method. |
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| 16 | * |
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| 17 | * This generator can be reused to generate many sets of |
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| 18 | * objects as it does not hold any state information. |
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| 19 | */ |
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| 20 | public DigitReducerGenerator() { } |
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| 21 | |
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| 22 | /* |
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| 23 | * Generate @length distinct Reducer functors |
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| 24 | * @length - the number of Reducers to generate |
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| 25 | * @param - a parameter to be sent to the reducers |
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| 26 | * |
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| 27 | * @return an array of all Reducer objects created |
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| 28 | */ |
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| 29 | public HashReducer[] generate(int length, int param) |
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| 30 | { |
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| 31 | try |
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| 32 | { |
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| 33 | HashReducer[] r; |
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| 34 | |
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| 35 | r = new HashReducer[length]; |
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| 36 | for (int i = 0; i < length; i++) |
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| 37 | r[i] = new DigitReducer(i, param); |
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| 38 | |
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| 39 | return r; |
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| 40 | } |
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| 41 | catch(Exception e) |
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| 42 | { |
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| 43 | /* |
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| 44 | * Fallback to an empty list of reducers. |
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| 45 | */ |
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| 46 | return new HashReducer[0]; |
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| 47 | } |
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| 48 | } |
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| 49 | } |
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| 50 | |
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