Metric: Message latency

Defined as a difference between now and vesHeader.lastEpochTime.

Change-Id: I4aa97e8efc13cb0039fde38b4fd2aa6411c7b89a
Issue-ID: DCAEGEN2-1036
Signed-off-by: Piotr Jaszczyk <piotr.jaszczyk@nokia.com>

2 files changed, 81 insertions, 0 deletions

diff --git a/sources/hv-collector-utils/src/main/kotlin/org/onap/dcae/collectors/veshv/utils/time.kt b/sources/hv-collector-utils/src/main/kotlin/org/onap/dcae/collectors/veshv/utils/time.kt
new file mode 100644
index 00000000..c07da670
--- /dev/null
+++ b/sources/hv-collector-utils/src/main/kotlin/org/onap/dcae/collectors/veshv/utils/time.kt
@@ -0,0 +1,37 @@
+/*
+ * ============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.utils
+
+import java.time.Instant
+
+/**
+ * @author Piotr Jaszczyk <piotr.jaszczyk@nokia.com>
+ * @since December 2018
+ */
+object TimeUtils {
+    fun epochMicroToInstant(epochMicroseconds: Long): Instant {
+        val seconds = epochMicroseconds / MICROSECONDS_IN_SECOND
+        val nanos = (epochMicroseconds - seconds * MICROSECONDS_IN_SECOND) * NANOSECONDS_IN_MICROSECOND
+        return Instant.ofEpochSecond(seconds, nanos)
+    }
+
+    private const val MICROSECONDS_IN_SECOND = 1_000_000L
+    private const val NANOSECONDS_IN_MICROSECOND = 1_000L
+}
diff --git a/sources/hv-collector-utils/src/test/kotlin/org/onap/dcae/collectors/veshv/utils/time_test.kt b/sources/hv-collector-utils/src/test/kotlin/org/onap/dcae/collectors/veshv/utils/time_test.kt
new file mode 100644
index 00000000..3ec74ab7
--- /dev/null
+++ b/sources/hv-collector-utils/src/test/kotlin/org/onap/dcae/collectors/veshv/utils/time_test.kt
@@ -0,0 +1,44 @@
+/*
+ * ============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.utils
+
+import org.assertj.core.api.Assertions.assertThat
+import org.jetbrains.spek.api.Spek
+import org.jetbrains.spek.api.dsl.describe
+import org.jetbrains.spek.api.dsl.it
+import java.time.Instant
+
+/**
+ * @author Piotr Jaszczyk <piotr.jaszczyk@nokia.com>
+ * @since December 2018
+ */
+internal object TimeTest : Spek({
+    describe("epochMicrosecond to Instant converter") {
+        it("should convert") {
+            val epochSeconds = 1545048422L
+            val nanoAdjustment = 666999000L
+            val epochMicros = 1545048422666999L
+
+            val result = TimeUtils.epochMicroToInstant(epochMicros)
+
+            assertThat(result).isEqualTo(Instant.ofEpochSecond(epochSeconds, nanoAdjustment))
+        }
+    }
+})