groovy node-tree integration

[controller.git] / opendaylight / sal / yang-prototype / yang / yang-data-impl / src / test / java / org / opendaylight / controller / yang / data / impl / MemoryConsumption.java

diff --git a/opendaylight/sal/yang-prototype/yang/yang-data-impl/src/test/java/org/opendaylight/controller/yang/data/impl/MemoryConsumption.java b/opendaylight/sal/yang-prototype/yang/yang-data-impl/src/test/java/org/opendaylight/controller/yang/data/impl/MemoryConsumption.java
new file mode 100644 (file)
index 0000000..e53307d
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+++ b/opendaylight/sal/yang-prototype/yang/yang-data-impl/src/test/java/org/opendaylight/controller/yang/data/impl/MemoryConsumption.java
@@ -0,0 +1,53 @@
+/**
+ * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+
+package org.opendaylight.controller.yang.data.impl;
+
+/**
+ * Provides memory consumption and elapsed time between 2 points 
+ * @author mirehak
+ */
+public class MemoryConsumption {
+    
+    private long memBegin;
+    private long tsBegin;
+
+    /**
+     * record memory and timestamp
+     */
+    public void startObserving() {
+        Runtime runtime = Runtime.getRuntime();
+        // Run the garbage collector
+        runtime.gc();
+        memBegin = getActualMemoryConsumption();
+        tsBegin = System.currentTimeMillis();
+    }
+    
+    
+    /**
+     * @return memory usage and time elapsed message
+     */
+    public String finishObserving() {
+        long memEnd = getActualMemoryConsumption();
+        long tsEnd = System.currentTimeMillis();
+        return String.format("Used memory: %10d B; Elapsed time: %5d ms", (memEnd - memBegin), (tsEnd - tsBegin));
+    }
+    
+    
+    /**
+     * @return actual memory usage
+     */
+    public static long getActualMemoryConsumption() {
+        Runtime runtime = Runtime.getRuntime();
+        // Calculate the used memory
+        long memory = runtime.totalMemory() - runtime.freeMemory();
+        return memory;
+    }
+    
+    
+}