com.netflix.spectator.atlas.impl

Class DataExpr.Count

java.lang.Object

com.netflix.spectator.atlas.impl.DataExpr.Count

All Implemented Interfaces:

DataExpr, DataExpr.AggregateFunction

Enclosing interface:

DataExpr

public static final class DataExpr.Count
extends Object
implements DataExpr.AggregateFunction

Aggregates all datapoints that match the query to a single datapoint that is the number of input values. See also: https://github.com/Netflix/atlas/wiki/data-count

Nested Class Summary

Nested classes/interfaces inherited from interface com.netflix.spectator.atlas.impl.DataExpr

DataExpr.AggregateFunction, DataExpr.Aggregator, DataExpr.All, DataExpr.Count, DataExpr.DropRollup, DataExpr.GroupBy, DataExpr.KeepRollup, DataExpr.Max, DataExpr.Min, DataExpr.Sum

Method Summary

Modifier and Type	Method and Description
DataExpr.Aggregator	aggregator(Map<String,String> tags, boolean shouldCheckQuery) Get an aggregator that can be incrementally fed values.
boolean	equals(Object obj)
int	hashCode()
Query	query() Query for selecting the input measurements that should be aggregated.
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface com.netflix.spectator.atlas.impl.DataExpr

aggregator, eval

Method Detail

query

public Query query()

Description copied from interface: DataExpr

Query for selecting the input measurements that should be aggregated.

Specified by:

query in interface DataExpr

aggregator

public DataExpr.Aggregator aggregator(Map<String,String> tags,
                                      boolean shouldCheckQuery)

Description copied from interface: DataExpr

Get an aggregator that can be incrementally fed values. See DataExpr.eval(Iterable) if you already have the completed list of values.

Specified by:

aggregator in interface DataExpr

Parameters:

tags - The set of tags for the final aggregate.

shouldCheckQuery - If true, then values will be checked against the query before applying to the aggregate. Otherwise, it is assumed that the user has already verified that the datapoint matches before passing it in.

Returns:

Aggregator for this data expression.

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object