1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
|
/*
* =========================================================================================
* Copyright © 2013 the kamon project <http://kamon.io/>
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the
* License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
* either express or implied. See the License for the specific language governing permissions
* and limitations under the License.
* =========================================================================================
*/
package kamon.metric
import akka.actor
import kamon.metric.SubscriptionsDispatcher.{ Unsubscribe, Subscribe }
import kamon.Kamon
import kamon.metric.instrument.{ InstrumentFactory, CollectionContext }
import kamon.supervisor.ModuleSupervisor
import scala.collection.concurrent.TrieMap
import akka.actor._
import kamon.util.{ FastDispatch, TriemapAtomicGetOrElseUpdate }
object Metrics extends ExtensionId[MetricsExtension] with ExtensionIdProvider {
override def get(system: ActorSystem): MetricsExtension = super.get(system)
def lookup(): ExtensionId[_ <: actor.Extension] = Metrics
def createExtension(system: ExtendedActorSystem): MetricsExtension = new MetricsExtensionImpl(system)
}
case class EntityRegistration[T <: EntityRecorder](entity: Entity, recorder: T)
trait MetricsExtension extends Kamon.Extension {
def settings: MetricsExtensionSettings
def shouldTrack(entity: Entity): Boolean
def shouldTrack(entityName: String, category: String): Boolean =
shouldTrack(Entity(entityName, category))
def register[T <: EntityRecorder](recorderFactory: EntityRecorderFactory[T], entityName: String): Option[EntityRegistration[T]]
def register[T <: EntityRecorder](entity: Entity, recorder: T): EntityRegistration[T]
def unregister(entity: Entity): Unit
def find(entity: Entity): Option[EntityRecorder]
def find(name: String, category: String): Option[EntityRecorder]
def subscribe(filter: SubscriptionFilter, subscriber: ActorRef): Unit =
subscribe(filter, subscriber, permanently = false)
def subscribe(category: String, selection: String, subscriber: ActorRef, permanently: Boolean): Unit =
subscribe(SubscriptionFilter(category, selection), subscriber, permanently)
def subscribe(category: String, selection: String, subscriber: ActorRef): Unit =
subscribe(SubscriptionFilter(category, selection), subscriber, permanently = false)
def subscribe(filter: SubscriptionFilter, subscriber: ActorRef, permanently: Boolean): Unit
def unsubscribe(subscriber: ActorRef): Unit
def buildDefaultCollectionContext: CollectionContext
def instrumentFactory(category: String): InstrumentFactory
}
class MetricsExtensionImpl(system: ExtendedActorSystem) extends MetricsExtension {
import FastDispatch.Syntax
val settings = MetricsExtensionSettings(system)
private val _trackedEntities = TrieMap.empty[Entity, EntityRecorder]
private val _collectionContext = buildDefaultCollectionContext
private val _metricsCollectionDispatcher = system.dispatchers.lookup(settings.metricCollectionDispatcher)
private lazy val _subscriptions = ModuleSupervisor.get(system).createModule("subscriptions-dispatcher",
SubscriptionsDispatcher.props(settings.tickInterval, collectSnapshots).withDispatcher(settings.metricCollectionDispatcher))
def shouldTrack(entity: Entity): Boolean =
settings.entityFilters.get(entity.category).map {
filter ⇒ filter.accept(entity.name)
} getOrElse (settings.trackUnmatchedEntities)
def register[T <: EntityRecorder](recorderFactory: EntityRecorderFactory[T], entityName: String): Option[EntityRegistration[T]] = {
import TriemapAtomicGetOrElseUpdate.Syntax
val entity = Entity(entityName, recorderFactory.category)
if (shouldTrack(entity)) {
val instrumentFactory = settings.instrumentFactories.get(recorderFactory.category).getOrElse(settings.defaultInstrumentFactory)
val recorder = _trackedEntities.atomicGetOrElseUpdate(entity, recorderFactory.createRecorder(instrumentFactory)).asInstanceOf[T]
Some(EntityRegistration(entity, recorder))
} else None
}
def register[T <: EntityRecorder](entity: Entity, recorder: T): EntityRegistration[T] = {
import TriemapAtomicGetOrElseUpdate.Syntax
EntityRegistration(entity, _trackedEntities.atomicGetOrElseUpdate(entity, recorder).asInstanceOf[T])
}
def unregister(entity: Entity): Unit =
_trackedEntities.remove(entity).map(_.cleanup)
def find(entity: Entity): Option[EntityRecorder] =
_trackedEntities.get(entity)
def find(name: String, category: String): Option[EntityRecorder] =
find(Entity(name, category))
def subscribe(filter: SubscriptionFilter, subscriber: ActorRef, permanent: Boolean): Unit =
_subscriptions.fastDispatch(Subscribe(filter, subscriber, permanent))(_metricsCollectionDispatcher)
def unsubscribe(subscriber: ActorRef): Unit =
_subscriptions.fastDispatch(Unsubscribe(subscriber))(_metricsCollectionDispatcher)
def buildDefaultCollectionContext: CollectionContext =
CollectionContext(settings.defaultCollectionContextBufferSize)
def instrumentFactory(category: String): InstrumentFactory =
settings.instrumentFactories.getOrElse(category, settings.defaultInstrumentFactory)
/**
* Collect and dispatch.
*/
private def collectSnapshots(): Map[Entity, EntitySnapshot] = {
val builder = Map.newBuilder[Entity, EntitySnapshot]
_trackedEntities.foreach {
case (identity, recorder) ⇒ builder += ((identity, recorder.collect(_collectionContext)))
}
builder.result()
}
}
|
