| 1 | package de.uka.ipd.sdq.probespec.framework.calculator; |
| 2 | |
| 3 | import java.math.BigDecimal; |
| 4 | import java.util.Vector; |
| 5 | |
| 6 | import javax.measure.Measure; |
| 7 | import javax.measure.quantity.Duration; |
| 8 | import javax.measure.quantity.Quantity; |
| 9 | |
| 10 | import de.uka.ipd.sdq.probespec.framework.ProbeSample; |
| 11 | import de.uka.ipd.sdq.probespec.framework.ProbeSetSample; |
| 12 | import de.uka.ipd.sdq.probespec.framework.ProbeSpecContext; |
| 13 | import de.uka.ipd.sdq.probespec.framework.ProbeType; |
| 14 | import de.uka.ipd.sdq.probespec.framework.exceptions.CalculatorException; |
| 15 | import de.uka.ipd.sdq.probespec.framework.matching.IMatchRule; |
| 16 | import de.uka.ipd.sdq.probespec.framework.matching.ProbeTypeMatchRule; |
| 17 | |
| 18 | /** |
| 19 | * Calculates a time span. It expects two ProbeSets each containing at least a |
| 20 | * {@link ProbeType#CURRENT_TIME} probe. |
| 21 | * |
| 22 | * @author Faber, Philipp Merkle |
| 23 | * |
| 24 | */ |
| 25 | public abstract class TimeSpanCalculator extends BinaryCalculator { |
| 26 | |
| 27 | public TimeSpanCalculator(ProbeSpecContext ctx, Integer startProbeSetID, Integer endProbeSetID) { |
| 28 | super(ctx, startProbeSetID, endProbeSetID); |
| 29 | } |
| 30 | |
| 31 | /** |
| 32 | * Calculates the time span. |
| 33 | * |
| 34 | * @param start |
| 35 | * the ProbeSample of the start ProbeSet (ProbeType.CURRENT_TIME) |
| 36 | * @param end |
| 37 | * the ProbeSample of the end ProbeSet (ProbeType.CURRENT_TIME) |
| 38 | * @return a result tuple containing two components. The first component is |
| 39 | * the calculated time span, the second component is the end time of |
| 40 | * the time span. |
| 41 | */ |
| 42 | @Override |
| 43 | protected Vector<Measure<?, ? extends Quantity>> calculate( |
| 44 | ProbeSetSample start, ProbeSetSample end) |
| 45 | throws CalculatorException { |
| 46 | // Obtain start time sample |
| 47 | ProbeSample<Double, Duration> startTimeSample = obtainCurrentTimeProbeSample(start); |
| 48 | if (startTimeSample == null) { |
| 49 | throw new CalculatorException( |
| 50 | "Could not access start probe sample."); |
| 51 | } |
| 52 | |
| 53 | // Obtain end time sample |
| 54 | ProbeSample<Double, Duration> endTimeSample = obtainCurrentTimeProbeSample(end); |
| 55 | if (endTimeSample == null) { |
| 56 | throw new CalculatorException("Could not access end probe sample."); |
| 57 | } |
| 58 | |
| 59 | // Calculate time span |
| 60 | BigDecimal endTime = BigDecimal.valueOf(endTimeSample.getMeasure().doubleValue( |
| 61 | startTimeSample.getMeasure().getUnit())); |
| 62 | BigDecimal startTime = BigDecimal.valueOf(startTimeSample.getMeasure().doubleValue( |
| 63 | startTimeSample.getMeasure().getUnit())); |
| 64 | |
| 65 | BigDecimal responseTime = endTime.subtract(startTime); |
| 66 | |
| 67 | // Create result tuple |
| 68 | Measure<Double, Duration> timeSpanMeasure = Measure.valueOf( |
| 69 | responseTime.doubleValue(), startTimeSample.getMeasure().getUnit()); |
| 70 | Measure<Double, Duration> endTimeMeasure = endTimeSample.getMeasure(); |
| 71 | Vector<Measure<?, ? extends Quantity>> resultTuple = new Vector<Measure<?, ? extends Quantity>>(); |
| 72 | resultTuple.add(timeSpanMeasure); |
| 73 | resultTuple.add(endTimeMeasure); |
| 74 | |
| 75 | return resultTuple; |
| 76 | } |
| 77 | |
| 78 | @SuppressWarnings("unchecked") |
| 79 | private ProbeSample<Double, Duration> obtainCurrentTimeProbeSample( |
| 80 | ProbeSetSample probeSetSample) { |
| 81 | IMatchRule[] rules = new IMatchRule[1]; |
| 82 | rules[0] = new ProbeTypeMatchRule(ProbeType.CURRENT_TIME); |
| 83 | Vector<ProbeSample<?, ? extends Quantity>> result = probeSetSample |
| 84 | .getProbeSamples(rules); |
| 85 | |
| 86 | if (result != null && result.size() > 0) |
| 87 | return (ProbeSample<Double, Duration>) result.get(0); |
| 88 | |
| 89 | return null; |
| 90 | } |
| 91 | |
| 92 | } |