Top Description Fields Constructors Methods
org.glassfish.pfl.tf.timer.spi

public Class Statistics

extends Object
Class Inheritance

A simple read-only holder for accumulated statistics.

Field Summary

Modifier and TypeField and Description
private final double
private final long
private final double
private final double
private final double

Constructor Summary

AccessConstructor and Description
public
Statistics(long count, double min, double max, double average, double standardDeviation)

Method Summary

Modifier and TypeMethod and Description
public double
average()

Return the current average of the data, or -1 if there is no data.

public long
count()

Return the number of data points recorded.

public boolean
equals(Object obj)

Overrides java.lang.Object.equals.

Indicates whether some other object is "equal to" this one.

public int
hashCode()

Overrides java.lang.Object.hashCode.

Returns a hash code value for this object.

public double
max()

Return the maximum value of call data points records.

public double
min()

Return the minimum value of call data points records.

public double
standardDeviation()

Return the standard deviation of the data, or -1 if there is no data.

Inherited from java.lang.Object:
clonefinalizegetClassnotifynotifyAlltoStringwaitwaitwait

Field Detail

averageback to summary
private final double average
countback to summary
private final long count
maxback to summary
private final double max
minback to summary
private final double min
standardDeviationback to summary
private final double standardDeviation

Constructor Detail

Statisticsback to summary
public Statistics(long count, double min, double max, double average, double standardDeviation)

Method Detail

averageback to summary
public double average()

Return the current average of the data, or -1 if there is no data.

countback to summary
public long count()

Return the number of data points recorded.

equalsback to summary
public boolean equals(Object obj)

Overrides java.lang.Object.equals.

Doc from java.lang.Object.equals.

Indicates whether some other object is "equal to" this one.

The equals method implements an equivalence relation on non-null object references:

  • It is reflexive: for any non-null reference value x, x.equals(x) should return true.
  • It is symmetric: for any non-null reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true.
  • It is transitive: for any non-null reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.
  • It is consistent: for any non-null reference values x and y, multiple invocations of x.equals(y) consistently return true or consistently return false, provided no information used in equals comparisons on the objects is modified.
  • For any non-null reference value x, x.equals(null) should return false.

An equivalence relation partitions the elements it operates on into equivalence classes; all the members of an equivalence class are equal to each other. Members of an equivalence class are substitutable for each other, at least for some purposes.

Annotations
@Override
hashCodeback to summary
public int hashCode()

Overrides java.lang.Object.hashCode.

Doc from java.lang.Object.hashCode.

Returns a hash code value for this object. This method is supported for the benefit of hash tables such as those provided by java.util.HashMap.

The general contract of hashCode is:

  • Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
  • If two objects are equal according to the equals method, then calling the hashCode method on each of the two objects must produce the same integer result.
  • It is not required that if two objects are unequal according to the equals method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.
Annotations
@Override
maxback to summary
public double max()

Return the maximum value of call data points records.

minback to summary
public double min()

Return the minimum value of call data points records.

standardDeviationback to summary
public double standardDeviation()

Return the standard deviation of the data, or -1 if there is no data.