support for custom metrics

1 files changed, 61 insertions, 0 deletions

diff --git a/kamon-core/src/test/scala/kamon/metrics/CustomMetricSpec.scala b/kamon-core/src/test/scala/kamon/metrics/CustomMetricSpec.scala
new file mode 100644
index 00000000..f5caf6e9
--- /dev/null
+++ b/kamon-core/src/test/scala/kamon/metrics/CustomMetricSpec.scala
@@ -0,0 +1,61 @@
+/*
+ * =========================================================================================
+ * 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.testkit.TestKitBase
+import org.scalatest.{ Matchers, WordSpecLike }
+import akka.actor.ActorSystem
+import scala.concurrent.duration._
+import com.typesafe.config.ConfigFactory
+import kamon.Kamon
+import kamon.metrics.Subscriptions.TickMetricSnapshot
+
+class CustomMetricSpec extends TestKitBase with WordSpecLike with Matchers {
+  implicit lazy val system: ActorSystem = ActorSystem("actor-metrics-spec", ConfigFactory.parseString(
+    """
+      |kamon.metrics {
+      |  filters = [
+      |    {
+      |      custom-metric {
+      |        includes = [ "test/*" ]
+      |        excludes = [ ]
+      |      }
+      |    }
+      |  ]
+      |}
+    """.stripMargin))
+
+  "the Kamon custom metrics support" should {
+    "allow registering a custom metric with the Metrics extension" in {
+      val recorder = Kamon(Metrics).register(CustomMetric("test/sample-counter"), CustomMetric.withConfig(100, 2))
+
+      recorder should be('defined)
+    }
+
+    "allow subscriptions to custom metrics using the default subscription protocol" in {
+      val recorder = Kamon(Metrics).register(CustomMetric("test/sample-counter"), CustomMetric.withConfig(100, 2))
+      recorder.map(_.record(100))
+
+      Kamon(Metrics).subscribe(CustomMetric, "test/sample-counter", testActor)
+
+      println(within(5 seconds) {
+        expectMsgType[TickMetricSnapshot]
+      }.metrics(CustomMetric("test/sample-counter")))
+    }
+  }
+
+}