Package org.jgroups.util
Class Average
- java.lang.Object
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- org.jgroups.util.Average
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- All Implemented Interfaces:
Streamable
- Direct Known Subclasses:
AverageMinMax
public class Average extends java.lang.Object implements Streamable
Maintains an approximation of an average of values. Done by keeping track of the number of samples, and computing the new average as (count*avg + new-sample) / ++count. We reset the count if count*avg would lead to an overflow. This class is not thread-safe and relies on external synchronization.- Since:
- 3.4
- Author:
- Bela Ban
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Constructor Summary
Constructors Constructor Description Average()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description <T extends Average>
Tadd(long num)
double
average()
void
clear()
long
count()
double
getAverage()
long
getCount()
<T extends Average>
Tmerge(T other)
Merges this average with another onevoid
readFrom(java.io.DataInput in)
Read the state of the current object (including superclasses) from instream Note that the input stream must not be closedjava.lang.String
toString()
void
writeTo(java.io.DataOutput out)
Write the entire state of the current object (including superclasses) to outstream.
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Method Detail
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add
public <T extends Average> T add(long num)
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merge
public <T extends Average> T merge(T other)
Merges this average with another one
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getAverage
public double getAverage()
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average
public double average()
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getCount
public long getCount()
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count
public long count()
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clear
public void clear()
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toString
public java.lang.String toString()
- Overrides:
toString
in classjava.lang.Object
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writeTo
public void writeTo(java.io.DataOutput out) throws java.io.IOException
Description copied from interface:Streamable
Write the entire state of the current object (including superclasses) to outstream. Note that the output stream must not be closed- Specified by:
writeTo
in interfaceStreamable
- Throws:
java.io.IOException
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readFrom
public void readFrom(java.io.DataInput in) throws java.io.IOException
Description copied from interface:Streamable
Read the state of the current object (including superclasses) from instream Note that the input stream must not be closed- Specified by:
readFrom
in interfaceStreamable
- Throws:
java.io.IOException
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