class LongAccumulator extends AccumulatorV2[Long, Long]
An accumulator for computing sum, count, and average of 64-bit integers.
- Source
- AccumulatorV2.scala
- Since
2.0.0
- Alphabetic
- By Inheritance
- LongAccumulator
- AccumulatorV2
- Serializable
- Serializable
- AnyRef
- Any
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- Public
- All
Instance Constructors
- new LongAccumulator()
Value Members
-
def
add(v: Long): Unit
Adds v to the accumulator, i.e.
Adds v to the accumulator, i.e. increment sum by v and count by 1.
- Since
2.0.0
-
def
add(v: Long): Unit
Adds v to the accumulator, i.e.
Adds v to the accumulator, i.e. increment sum by v and count by 1.
- Definition Classes
- LongAccumulator → AccumulatorV2
- Since
2.0.0
-
def
avg: Double
Returns the average of elements added to the accumulator.
Returns the average of elements added to the accumulator.
- Since
2.0.0
-
def
copy(): LongAccumulator
Creates a new copy of this accumulator.
Creates a new copy of this accumulator.
- Definition Classes
- LongAccumulator → AccumulatorV2
-
def
copyAndReset(): AccumulatorV2[Long, Long]
Creates a new copy of this accumulator, which is zero value.
Creates a new copy of this accumulator, which is zero value. i.e. call
isZero
on the copy must return true.- Definition Classes
- AccumulatorV2
-
def
count: Long
Returns the number of elements added to the accumulator.
Returns the number of elements added to the accumulator.
- Since
2.0.0
-
final
def
id: Long
Returns the id of this accumulator, can only be called after registration.
Returns the id of this accumulator, can only be called after registration.
- Definition Classes
- AccumulatorV2
-
final
def
isRegistered: Boolean
Returns true if this accumulator has been registered.
Returns true if this accumulator has been registered.
- Definition Classes
- AccumulatorV2
- Note
All accumulators must be registered before use, or it will throw exception.
-
def
isZero: Boolean
Returns false if this accumulator has had any values added to it or the sum is non-zero.
Returns false if this accumulator has had any values added to it or the sum is non-zero.
- Definition Classes
- LongAccumulator → AccumulatorV2
- Since
2.0.0
-
def
merge(other: AccumulatorV2[Long, Long]): Unit
Merges another same-type accumulator into this one and update its state, i.e.
Merges another same-type accumulator into this one and update its state, i.e. this should be merge-in-place.
- Definition Classes
- LongAccumulator → AccumulatorV2
-
final
def
name: Option[String]
Returns the name of this accumulator, can only be called after registration.
Returns the name of this accumulator, can only be called after registration.
- Definition Classes
- AccumulatorV2
-
def
reset(): Unit
Resets this accumulator, which is zero value.
Resets this accumulator, which is zero value. i.e. call
isZero
must return true.- Definition Classes
- LongAccumulator → AccumulatorV2
-
def
sum: Long
Returns the sum of elements added to the accumulator.
Returns the sum of elements added to the accumulator.
- Since
2.0.0
-
def
toString(): String
- Definition Classes
- AccumulatorV2 → AnyRef → Any
-
def
value: Long
Defines the current value of this accumulator
Defines the current value of this accumulator
- Definition Classes
- LongAccumulator → AccumulatorV2