Add JvmInformation#getMemoryUsed method

base/src/main/java/de/staropensource/sosengine/base/data/info/JvmInformation.java

@@ -120,7 +120,7 @@ public final class JvmInformation {
     }
 
     /**
-     * Returns the total amount of memory used by the JVM and the running application.
+     * Returns the total amount of memory used the running application AND JVM.
      * <p>
      * Note: This is an estimate.
      *
@@ -151,6 +151,16 @@ public final class JvmInformation {
         return Runtime.getRuntime().freeMemory();
     }
 
+    /**
+     * Returns the amount of memory used by the running application.
+     *
+     * @return amount of used memory
+     * @since 1-alpha1
+     */
+    public static long getMemoryUsed() {
+        return getMemoryMax() - getMemoryFree();
+    }
+
     /**
      * Returns the memory usage of the heap.
      *