VDef

java.lang.Object

org.rrd4j.data.Source

org.rrd4j.data.VDef

All Implemented Interfaces:: NonRrdSource

class VDefextends Source implements NonRrdSource

RRD VDEF (Variable Definition) implementation.
Creates computed data sources by applying aggregation functions to existing data sources.

Field Summary
Fields
Modifier and Type
Field
Description
private final String
defName
Name other definitions use to refer to this one.
private final Variable
var
The variable holding the defined value.
Fields inherited from class Source
timestamps, values
Modifier and Type
Field
Description
protected long[]
timestamps
timestamps corresponding to data values
protected double[]
values
data values
Constructor Summary
Constructors
Constructor
Description
VDef(String name, String defName, Variable aggr)
Create a computed data source backed by an aggregation over another source.
Method Summary
Public Methods
Modifier and Type
Method
Description
void
calculate(long tStart, long tEnd, DataProcessor dataProcessor)
Aggregate the named source over the requested time range into this variable.
(package private) String
getDefName()
Read the def name this source is published under.
Variable.Value
getValue()
Value from the wrapped variable.
(package private) double[]
getValues()
Returns the data values.
Methods inherited from class Source
getName, getTimestamps, setTimestamps, setValues
Modifier and Type
Method
Description
(package private) String
getName()
Returns the source name.
(package private) long[]
getTimestamps()
The time, in seconds since the epoch, of each recorded value.
(package private) void
setTimestamps(long[] timestamps)
Sets the timestamps.
(package private) void
setValues(double[] values)
Sets the data values.
Methods inherited from class Object
clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details
- defName
  private final String defName
  Name other definitions use to refer to this one.
- var
  private final Variable var
  The variable holding the defined value.
Constructor Details
- VDef
  VDef(String name, String defName, Variable aggr)
  Create a computed data source backed by an aggregation over another source.
  Parameters:
  name - the name this source is published under
  defName - the name of the source this variable aggregates
  aggr - the aggregation to apply to that source
Method Details
- getDefName
  String getDefName()
  Read the def name this source is published under.
  Returns:
  the def name
- calculate
  public void calculate(long tStart, long tEnd, DataProcessor dataProcessor)
  Aggregate the named source over the requested time range into this variable.
  Specified by:
  calculate in interface NonRrdSource
  Parameters:
  tStart - start time for calculation
  tEnd - end time for calculation
  dataProcessor - DataProcessor object used to look up the named source
- getValue
  public Variable.Value getValue()
  Value from the wrapped variable.
  Returns:
  the value the wrapped Variable currently reports
- getValues
  double[] getValues()
  Description copied from class: Source
  Returns the data values.
  Overrides:
  getValues in class Source
  Returns:
  the values array

Field Summary

Fields inherited from class Source

Constructor Summary

Method Summary

Methods inherited from class Source

Methods inherited from class Object

Field Details

defName

var

Constructor Details

Method Details

getDefName

calculate

getValue

getValues