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
133
134
135
136
137
138
139
140
141
|
/*
* =========================================================================================
* 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 com.typesafe.config.Config
import kamon.metric.SubscriptionsDispatcher.{ Unsubscribe, Subscribe }
import kamon.metric.instrument.{ DefaultRefreshScheduler, InstrumentFactory, CollectionContext }
import scala.collection.concurrent.TrieMap
import akka.actor._
import kamon.util.{ LazyActorRef, TriemapAtomicGetOrElseUpdate }
case class EntityRegistration[T <: EntityRecorder](entity: Entity, recorder: T)
trait Metrics {
def settings: MetricsSettings
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
}
private[kamon] class MetricsImpl(config: Config) extends Metrics {
private val _trackedEntities = TrieMap.empty[Entity, EntityRecorder]
private val _subscriptions = new LazyActorRef
val settings = MetricsSettings(config)
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), _.cleanup).asInstanceOf[T]
Some(EntityRegistration(entity, recorder))
} else None
}
def register[T <: EntityRecorder](entity: Entity, recorder: T): EntityRegistration[T] = {
_trackedEntities.put(entity, recorder).map { oldRecorder ⇒
oldRecorder.cleanup
}
EntityRegistration(entity, recorder)
}
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.tell(Subscribe(filter, subscriber, permanent))
def unsubscribe(subscriber: ActorRef): Unit =
_subscriptions.tell(Unsubscribe(subscriber))
def buildDefaultCollectionContext: CollectionContext =
CollectionContext(settings.defaultCollectionContextBufferSize)
def instrumentFactory(category: String): InstrumentFactory =
settings.instrumentFactories.getOrElse(category, settings.defaultInstrumentFactory)
private[kamon] def collectSnapshots(collectionContext: CollectionContext): Map[Entity, EntitySnapshot] = {
val builder = Map.newBuilder[Entity, EntitySnapshot]
_trackedEntities.foreach {
case (identity, recorder) ⇒ builder += ((identity, recorder.collect(collectionContext)))
}
builder.result()
}
/**
* Metrics Extension initialization.
*/
private var _system: ActorSystem = null
private lazy val _start = {
_subscriptions.point(_system.actorOf(SubscriptionsDispatcher.props(settings.tickInterval, this), "metrics"))
settings.pointScheduler(DefaultRefreshScheduler(_system.scheduler, _system.dispatcher))
}
def start(system: ActorSystem): Unit = synchronized {
_system = system
_start
_system = null
}
}
private[kamon] object MetricsImpl {
def apply(config: Config) =
new MetricsImpl(config)
}
|
