| 1 | /** |
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| 2 | * |
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| 3 | */ |
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| 4 | package simulator.stats; |
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| 5 | |
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| 6 | import java.io.PrintStream; |
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| 7 | |
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| 8 | import simulator.DataCenterWorkloadSimulator; |
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| 9 | import gridsim.Accumulator; |
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| 10 | |
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| 11 | /** |
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| 12 | * This class temporarily adds new methods to {@link Accumulator} class. |
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| 13 | * |
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| 14 | * @author Stanislaw Szczepanowski |
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| 15 | * |
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| 16 | */ |
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| 17 | public class GSSAccumulator extends Accumulator { |
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| 18 | |
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| 19 | public GSSAccumulator() { |
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| 20 | super(); |
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| 21 | } |
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| 22 | |
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| 23 | public GSSAccumulator(Accumulator acc) { |
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| 24 | n_ = acc.getCount(); |
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| 25 | mean_ = acc.getMean(); |
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| 26 | sqrMean_ = acc.getStandardDeviation() + (mean_ * mean_); |
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| 27 | min_ = acc.getMin(); |
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| 28 | max_ = acc.getMax(); |
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| 29 | last_ = acc.getLast(); |
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| 30 | } |
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| 31 | |
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| 32 | /** |
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| 33 | * This method must be overloaded, since it returns the wrong value. |
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| 34 | */ |
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| 35 | public double getStandardDeviation() { |
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| 36 | return Math.sqrt(getVariance()); |
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| 37 | } |
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| 38 | |
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| 39 | /** |
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| 40 | * Calculates the variance of accumulated items |
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| 41 | * |
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| 42 | * @return the Standard Deviation of accumulated items |
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| 43 | * @pre $none |
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| 44 | * @post $none |
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| 45 | */ |
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| 46 | public double getVariance() { |
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| 47 | return sqrMean_ - (mean_ * mean_); |
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| 48 | } |
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| 49 | |
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| 50 | public boolean equals(Object obj) { |
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| 51 | if (!(obj instanceof GSSAccumulator)) |
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| 52 | return false; |
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| 53 | |
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| 54 | GSSAccumulator otherAcc = (GSSAccumulator) obj; |
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| 55 | if (Double.compare(this.last_, otherAcc.last_) != 0) |
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| 56 | return false; |
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| 57 | if (Double.compare(this.max_, otherAcc.max_) != 0) |
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| 58 | return false; |
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| 59 | if (Double.compare(this.mean_, otherAcc.mean_) != 0) |
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| 60 | return false; |
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| 61 | if (Double.compare(this.min_, otherAcc.min_) != 0) |
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| 62 | return false; |
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| 63 | if (Double.compare(this.n_, otherAcc.n_) != 0) |
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| 64 | return false; |
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| 65 | if (Double.compare(this.sqrMean_, otherAcc.sqrMean_) != 0) |
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| 66 | return false; |
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| 67 | |
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| 68 | return true; |
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| 69 | } |
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| 70 | |
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| 71 | public String toString() { |
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| 72 | String accumulatorSeparator = ";"; |
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| 73 | StringBuffer buffer = new StringBuffer(50); |
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| 74 | |
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| 75 | buffer.append(accumulatorSeparator); |
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| 76 | buffer.append(DataCenterWorkloadSimulator.DFAULT_NUMBER_FORMAT.format(this |
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| 77 | .getMean())); |
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| 78 | buffer.append(accumulatorSeparator); |
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| 79 | buffer.append(DataCenterWorkloadSimulator.DFAULT_NUMBER_FORMAT.format(this |
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| 80 | .getStandardDeviation())); |
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| 81 | buffer.append(accumulatorSeparator); |
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| 82 | buffer.append(DataCenterWorkloadSimulator.DFAULT_NUMBER_FORMAT.format(this |
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| 83 | .getVariance())); |
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| 84 | buffer.append(accumulatorSeparator); |
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| 85 | buffer.append(DataCenterWorkloadSimulator.DFAULT_NUMBER_FORMAT.format(this |
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| 86 | .getMin())); |
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| 87 | buffer.append(accumulatorSeparator); |
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| 88 | buffer.append(DataCenterWorkloadSimulator.DFAULT_NUMBER_FORMAT.format(this |
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| 89 | .getMax())); |
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| 90 | buffer.append(accumulatorSeparator); |
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| 91 | buffer.append(DataCenterWorkloadSimulator.DFAULT_NUMBER_FORMAT.format(this |
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| 92 | .getSum())); |
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| 93 | buffer.append(accumulatorSeparator); |
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| 94 | buffer.append(DataCenterWorkloadSimulator.DFAULT_NUMBER_FORMAT.format(this |
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| 95 | .getCount())); |
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| 96 | buffer.append(accumulatorSeparator); |
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| 97 | |
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| 98 | return buffer.toString(); |
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| 99 | } |
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| 100 | |
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| 101 | public String toFormatedString() { |
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| 102 | |
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| 103 | String accumulatorSeparator = "; "; |
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| 104 | StringBuffer buffer = new StringBuffer(50); |
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| 105 | |
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| 106 | buffer.append(accumulatorSeparator); |
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| 107 | buffer.append(String.format("%16s", |
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| 108 | DataCenterWorkloadSimulator.DFAULT_NUMBER_FORMAT.format(this |
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| 109 | .getMean()))); |
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| 110 | buffer.append(accumulatorSeparator); |
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| 111 | buffer.append(String.format("%16s", |
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| 112 | DataCenterWorkloadSimulator.DFAULT_NUMBER_FORMAT.format(this |
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| 113 | .getStandardDeviation()))); |
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| 114 | buffer.append(accumulatorSeparator); |
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| 115 | buffer.append(String.format("%16s", |
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| 116 | DataCenterWorkloadSimulator.DFAULT_NUMBER_FORMAT.format(this |
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| 117 | .getVariance()))); |
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| 118 | buffer.append(accumulatorSeparator); |
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| 119 | buffer.append(String.format("%16s", |
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| 120 | DataCenterWorkloadSimulator.DFAULT_NUMBER_FORMAT.format(this |
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| 121 | .getMin()))); |
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| 122 | buffer.append(accumulatorSeparator); |
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| 123 | buffer.append(String.format("%16s", |
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| 124 | DataCenterWorkloadSimulator.DFAULT_NUMBER_FORMAT.format(this |
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| 125 | .getMax()))); |
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| 126 | buffer.append(accumulatorSeparator); |
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| 127 | buffer.append(String.format("%16s", |
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| 128 | DataCenterWorkloadSimulator.DFAULT_NUMBER_FORMAT.format(this |
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| 129 | .getSum()))); |
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| 130 | buffer.append(accumulatorSeparator); |
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| 131 | buffer.append(String.format("%16s", |
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| 132 | DataCenterWorkloadSimulator.DFAULT_NUMBER_FORMAT.format(this |
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| 133 | .getCount()))); |
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| 134 | buffer.append(accumulatorSeparator); |
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| 135 | |
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| 136 | return buffer.toString(); |
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| 137 | } |
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| 138 | } |
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