Package org.rrd4j.data

RRD4J data management.
  • Class Summary 
    Class Description
    Aggregates Deprecated.
    This class is deprecated.
    CubicSplineInterpolator
    Class used to interpolate datasource values from the collection of (timestamp, values) points using natural cubic spline interpolation.
    DataProcessor
    Class which should be used for all calculations based on the data fetched from RRD files.
    LinearInterpolator
    Class used to interpolate datasource values from the collection of (timestamp, values) points.
    Plottable
    Abstract class to be used for custom datasources.
    Variable
    An abstract class to help extract single value from a set of value (VDEF in rrdtool) It can be used to add new fancy statistical calculation with rrd values
    Variable.AVERAGE
    Calculate the average of the data points.
    Variable.FIRST
    Find the first valid data point and it's timestamp
    Variable.LAST
    Find the first last valid point and it's timestamp
    Variable.LSLCORREL
    Calculate the correlation coefficient of the least squares line.
    Variable.LSLINT
    Calculate the y-intercept of the least squares line.
    Variable.LSLSLOPE
    Calculate the slop of the least squares line.
    Variable.MAX
    The biggest of the data points and it's time stamp (the first one) is stored.
    Variable.MIN
    The smallest of the data points and it's time stamp (the first one) is stored.
    Variable.PERCENTILE
    Find the point at the n-th percentile.
    Variable.PERCENTILENAN  
    Variable.STDDEV
    Calculate the standard deviation for the data point.
    Variable.TOTAL
    Calculate the sum of the data points.
    Variable.Value
    This class store both the value and the time stamp It will be used by graph rendering legend
  • Enum Summary 
    Enum Description
    LinearInterpolator.Method
    A enumeration of interpolation methods