Add monitoring support by means of micrometer.io

Closes ONAP-345

Change-Id: I58c145b1d37a6b32fbe5b157723c152eb571a2dd
Signed-off-by: Piotr Jaszczyk <piotr.jaszczyk@nokia.com>
Issue-ID: DCAEGEN2-601

2 files changed, 69 insertions, 1 deletions

diff --git a/hv-collector-main/src/main/kotlin/org/onap/dcae/collectors/veshv/main/MicrometerMetrics.kt b/hv-collector-main/src/main/kotlin/org/onap/dcae/collectors/veshv/main/MicrometerMetrics.kt
new file mode 100644
index 00000000..8a8b6d39
--- /dev/null
+++ b/hv-collector-main/src/main/kotlin/org/onap/dcae/collectors/veshv/main/MicrometerMetrics.kt
@@ -0,0 +1,67 @@
+/*
+ * ============LICENSE_START=======================================================
+ * dcaegen2-collectors-veshv
+ * ================================================================================
+ * Copyright (C) 2018 NOKIA
+ * ================================================================================
+ * 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.
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.dcae.collectors.veshv.main
+
+import arrow.syntax.function.memoize
+import io.micrometer.core.instrument.Clock
+import io.micrometer.core.instrument.Counter
+import io.micrometer.core.instrument.MeterRegistry
+import io.micrometer.jmx.JmxConfig
+import io.micrometer.jmx.JmxMeterRegistry
+import org.onap.dcae.collectors.veshv.boundary.Metrics
+
+/**
+ * @author Piotr Jaszczyk <piotr.jaszczyk@nokia.com>
+ * @since June 2018
+ */
+class MicrometerMetrics(
+        private val registry: MeterRegistry = JmxMeterRegistry(JmxConfig.DEFAULT, Clock.SYSTEM)
+) : Metrics {
+
+    private val receivedBytes = registry.counter("data.received.bytes")
+    private val receivedMsgCount = registry.counter("messages.received.count")
+    private val receivedMsgBytes = registry.counter("messages.received.bytes")
+    private val sentCountTotal = registry.counter("messages.sent.count")
+
+    init {
+        registry.gauge("messages.processing.count", this) {
+            (receivedMsgCount.count() - sentCountTotal.count()).coerceAtLeast(0.0)
+        }
+    }
+
+    private val sentCount = { topic: String ->
+        registry.counter("messages.sent.count", "topic", topic)
+    }.memoize<String, Counter>()
+
+
+    override fun notifyBytesReceived(size: Int) {
+        receivedBytes.increment(size.toDouble())
+    }
+
+    override fun notifyMessageReceived(size: Int) {
+        receivedMsgCount.increment()
+        receivedMsgBytes.increment(size.toDouble())
+    }
+
+    override fun notifyMessageSent(topic: String) {
+        sentCountTotal.increment()
+        sentCount(topic).increment()
+    }
+}
diff --git a/hv-collector-main/src/main/kotlin/org/onap/dcae/collectors/veshv/main/main.kt b/hv-collector-main/src/main/kotlin/org/onap/dcae/collectors/veshv/main/main.kt
index b7d97028..1f2686ba 100644
--- a/hv-collector-main/src/main/kotlin/org/onap/dcae/collectors/veshv/main/main.kt
+++ b/hv-collector-main/src/main/kotlin/org/onap/dcae/collectors/veshv/main/main.kt
@@ -39,7 +39,8 @@ fun main(args: Array<String>) {
 
         val collectorProvider = CollectorFactory(
                 resolveConfigurationProvider(serverConfiguration),
-                AdapterFactory.kafkaSink()
+                AdapterFactory.kafkaSink(),
+                MicrometerMetrics()
         ).createVesHvCollectorProvider()
         ServerFactory.createNettyTcpServer(serverConfiguration, collectorProvider).start().block()
     } catch (ex: WrongArgumentException) {