Add memory usage to integration tests [UPDATED]

Issue-ID: CPS-1753
Signed-off-by: emaclee <lee.anjella.macabuhay@est.tech>
Change-Id: I08fd0802f536b8fe333ddbfc9301356095f58171

1 files changed, 70 insertions, 0 deletions

diff --git a/integration-test/src/test/java/org/onap/cps/integration/ResourceMeter.java b/integration-test/src/test/java/org/onap/cps/integration/ResourceMeter.java
new file mode 100644
index 0000000000..c6ad96e917
--- /dev/null
+++ b/integration-test/src/test/java/org/onap/cps/integration/ResourceMeter.java
@@ -0,0 +1,70 @@
+/*
+ *  ============LICENSE_START=======================================================
+ *  Copyright (C) 2023 Nordix Foundation
+ *  ================================================================================
+ *  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.
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *  ============LICENSE_END=========================================================
+ */
+
+package org.onap.cps.integration;
+
+import org.springframework.util.StopWatch;
+
+/**
+ * Time and memory stop watch, exposing total running time and memory used.
+ */
+public class ResourceMeter {
+    private final StopWatch stopWatch = new StopWatch();
+    private long memoryUsedBefore;
+    private long memoryUsedAfter;
+
+    /**
+     * Start measurement.
+     */
+    public void start() {
+        System.gc();
+        memoryUsedBefore = getCurrentMemoryUsage();
+        stopWatch.start();
+    }
+
+    /**
+     * Stop measurement.
+     */
+    public void stop() {
+        stopWatch.stop();
+        memoryUsedAfter = getCurrentMemoryUsage();
+    }
+
+    /**
+     * Get the total time in milliseconds.
+     * @return total time in milliseconds
+     */
+    public long getTotalTimeMillis() {
+        return stopWatch.getTotalTimeMillis();
+    }
+
+    /**
+     * Get the total memory used in megabytes.
+     * @return total memory used in megabytes
+     */
+    public double getTotalMemoryUsageInMB() {
+        return (memoryUsedAfter - memoryUsedBefore) / 1_000_000.0;
+    }
+
+    private static long getCurrentMemoryUsage() {
+        return Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory();
+    }
+}
+