com.netflix.spectator.atlas.impl

Class Evaluator

java.lang.Object

com.netflix.spectator.atlas.impl.Evaluator

public class Evaluator
extends java.lang.Object

Evaluates all of the expressions for subscriptions associated with a group. Classes in this package are only intended for use internally within spectator. They may change at any time and without notice.

Constructor Summary

Constructors

Constructor and Description
Evaluator()

Method Summary

Modifier and Type	Method and Description
Evaluator	addGroupSubscriptions(java.lang.String group, java.util.List<Subscription> subs) Add subscriptions for a given group.
EvalPayload	eval(java.lang.String group, long timestamp, java.util.List<TagsValuePair> vs) Evaluate expressions for all subscriptions associated with the specified group using the provided data.
Evaluator	removeGroupSubscriptions(java.lang.String group) Remove subscriptions for a given group.
Evaluator	sync(java.util.Map<java.lang.String,java.util.List<Subscription>> subs) Synchronize the internal set of subscriptions with the map that is passed in.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Evaluator

public Evaluator()

Method Detail

sync

public Evaluator sync(java.util.Map<java.lang.String,java.util.List<Subscription>> subs)

Synchronize the internal set of subscriptions with the map that is passed in.

Parameters:

subs - Complete set of subscriptions for all groups. The keys for the map are the group names.

Returns:

This instance for chaining of update operations.

addGroupSubscriptions

public Evaluator addGroupSubscriptions(java.lang.String group,
                                       java.util.List<Subscription> subs)

Add subscriptions for a given group.

Parameters:

group - Name of the group. At Netflix this is typically the cluster that includes the instance reporting data.

subs - Set of subscriptions for the group.

Returns:

This instance for chaining of update operations.

removeGroupSubscriptions

public Evaluator removeGroupSubscriptions(java.lang.String group)

Remove subscriptions for a given group.

Parameters:

group - Name of the group. At Netflix this is typically the cluster that includes the instance reporting data.

Returns:

This instance for chaining of update operations.

eval

public EvalPayload eval(java.lang.String group,
                        long timestamp,
                        java.util.List<TagsValuePair> vs)

Evaluate expressions for all subscriptions associated with the specified group using the provided data.

Parameters:

group - Name of the group. At Netflix this is typically the cluster that includes the instance reporting data.

timestamp - Timestamp to use for the payload response.

vs - Set of values received for the group for the current time period.

Returns:

Payload that can be encoded and sent to Atlas streaming evaluation cluster.