Class HistogramRecord

    • Field Detail

      • COMPARATOR_FOR_LABEL

        public static final java.util.Comparator<HistogramRecord> COMPARATOR_FOR_LABEL
      • COMPARATOR_FOR_NUMBEROFOBJECTS

        public static final java.util.Comparator<HistogramRecord> COMPARATOR_FOR_NUMBEROFOBJECTS
      • COMPARATOR_FOR_USEDHEAPSIZE

        public static final java.util.Comparator<HistogramRecord> COMPARATOR_FOR_USEDHEAPSIZE
      • COMPARATOR_FOR_RETAINEDHEAPSIZE

        public static final java.util.Comparator<HistogramRecord> COMPARATOR_FOR_RETAINEDHEAPSIZE
    • Constructor Detail

      • HistogramRecord

        public HistogramRecord​(java.lang.String label)
        Create histogram record just with a label identifying it.
        Parameters:
        label - label identifying the histogram record
      • HistogramRecord

        public HistogramRecord​(java.lang.String label,
                               long numberOfObjects,
                               long usedHeapSize,
                               long retainedHeapSize)
        Create histogram record with a label identifying it and its basic data.
        Parameters:
        label - label identifying the histogram record
        numberOfObjects - number of objects this histogram record stands for
        usedHeapSize - number of bytes in heap area this histogram record stands for
    • Method Detail

      • getLabel

        public java.lang.String getLabel()
        Get label identifying the histogram record.
        Returns:
        label identifying the histogram record
      • setLabel

        public void setLabel​(java.lang.String label)
        Set label identifying the histogram record.
        Parameters:
        label - label identifying the histogram record
      • getNumberOfObjects

        public long getNumberOfObjects()
        Get number of objects this histogram record stands for.
        Returns:
        number of objects this histogram record stands for
      • setNumberOfObjects

        public void setNumberOfObjects​(long numberOfObjects)
        Set number of objects this histogram record stands for.
        Parameters:
        numberOfObjects - number of objects this histogram record stands for
      • incNumberOfObjects

        public void incNumberOfObjects()
        Increment number of objects this histogram record stands for by 1.
      • incNumberOfObjects

        public void incNumberOfObjects​(long inc)
        Increment number of objects this histogram record stands for.
        Parameters:
        inc - number of objects by which the number of objects should be incremented
      • getUsedHeapSize

        public long getUsedHeapSize()
        Get number of bytes in heap area this histogram record stands for.
        Returns:
        number of bytes in heap area this histogram record stands for
      • setUsedHeapSize

        public void setUsedHeapSize​(long usedHeapSize)
        Set number of bytes in heap area this histogram record stands for.
        Parameters:
        usedHeapSize - number of bytes in heap area this histogram record stands for
      • incUsedHeapSize

        public void incUsedHeapSize​(long inc)
        Increment number of bytes in heap area this histogram record stands for.
        Parameters:
        inc - number of bytes by which the number of bytes in heap area should be incremented
      • getRetainedHeapSize

        public long getRetainedHeapSize()
        Get number of retained bytes in heap area this histogram record stands for.

        Retained bytes means how much memory would be garbage collected if the references to the objects this histogram record stands for would be lost and the objects garbage collected.

        Returns:
        number of retained bytes in heap area this histogram record stands for
      • setRetainedHeapSize

        public void setRetainedHeapSize​(long retainedHeapSize)
        Set number of retained bytes in heap area this histogram record stands for.

        Retained bytes means how much memory would be garbage collected if the references to the objects this histogram record stands for would be lost and the objects garbage collected.

        Parameters:
        retainedHeapSize - number of retained bytes in heap area this histogram record stands for
      • incRetainedHeapSize

        public void incRetainedHeapSize​(long inc)
      • reverseComparator

        public static java.util.Comparator<HistogramRecord> reverseComparator​(java.util.Comparator<HistogramRecord> comparator)
        Convenience method reversing the order of the given comparator. Be aware that each time you call this method a new comparator is returned and that this comparator delegates the call to the given comparator, but just switches the parameters. You can get the same result with the given comparator, by iterating from the last to the first element instead. From performance perspective using e.g. List.get(int) is anyhow faster compared to an Iterator.
        Parameters:
        comparator - comparator for which a reversed comparator should be returned
        Returns:
        comparator comparing in reverse order than the given comparator