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
|
/*
* =========================================================================================
* 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.metrics
import akka.actor.{ ActorRef, Actor }
import kamon.metrics.Subscriptions.{ MetricGroupFilter, FlushMetrics, TickMetricSnapshot, Subscribe }
import kamon.util.GlobPathFilter
import scala.concurrent.duration.Duration
import java.util.concurrent.TimeUnit
import kamon.Kamon
class Subscriptions extends Actor {
import context.system
val config = context.system.settings.config
val tickInterval = Duration(config.getNanoseconds("kamon.metrics.tick-interval"), TimeUnit.NANOSECONDS)
val flushMetricsSchedule = context.system.scheduler.schedule(tickInterval, tickInterval, self, FlushMetrics)(context.dispatcher)
var lastTick: Long = System.currentTimeMillis()
var subscribedPermanently: Map[MetricGroupFilter, List[ActorRef]] = Map.empty
var subscribedForOneShot: Map[MetricGroupFilter, List[ActorRef]] = Map.empty
def receive = {
case Subscribe(category, selection, permanent) ⇒ subscribe(category, selection, permanent)
case FlushMetrics ⇒ flush()
}
def subscribe(category: MetricGroupCategory, selection: String, permanent: Boolean): Unit = {
val filter = MetricGroupFilter(category, new GlobPathFilter(selection))
if (permanent) {
val receivers = subscribedPermanently.get(filter).getOrElse(Nil)
subscribedPermanently = subscribedPermanently.updated(filter, sender :: receivers)
} else {
val receivers = subscribedForOneShot.get(filter).getOrElse(Nil)
subscribedForOneShot = subscribedForOneShot.updated(filter, sender :: receivers)
}
}
def flush(): Unit = {
val currentTick = System.currentTimeMillis()
val snapshots = Kamon(Metrics).collect
dispatchSelectedMetrics(lastTick, currentTick, subscribedPermanently, snapshots)
dispatchSelectedMetrics(lastTick, currentTick, subscribedForOneShot, snapshots)
lastTick = currentTick
subscribedForOneShot = Map.empty
}
def dispatchSelectedMetrics(lastTick: Long, currentTick: Long, subscriptions: Map[MetricGroupFilter, List[ActorRef]],
snapshots: Map[MetricGroupIdentity, MetricGroupSnapshot]): Unit = {
for ((filter, receivers) ← subscriptions) yield {
val selection = snapshots.filter(group ⇒ filter.accept(group._1))
val tickMetrics = TickMetricSnapshot(lastTick, currentTick, selection)
receivers.foreach(_ ! tickMetrics)
}
}
}
object Subscriptions {
case object FlushMetrics
case class Subscribe(category: MetricGroupCategory, selection: String, permanently: Boolean = false)
case class TickMetricSnapshot(from: Long, to: Long, metrics: Map[MetricGroupIdentity, MetricGroupSnapshot])
case class MetricGroupFilter(category: MetricGroupCategory, globFilter: GlobPathFilter) {
def accept(identity: MetricGroupIdentity): Boolean = {
category.equals(identity.category) && globFilter.accept(identity.name)
}
}
}
|
