Enh 35520698 - [35345719->14.1.1.0.14] ENH: Add cache mbean operation method to get distributed cache back map total size (14.1.1.0 -> ce-14.1.1.0@101355)

[git-p4: depot-paths = "//dev/coherence-ce/release/coherence-ce-v14.1.1.0/": change = 101362]

Author: tmiddleton

prj/test/functional/jmx/src/test/java/jmx/StorageManagerMBeanTests.java

@@ -37,6 +37,7 @@
 import javax.management.ObjectName;
 
 import org.junit.AfterClass;
+import org.junit.Assert;
 import org.junit.BeforeClass;
 import org.junit.Test;
 
@@ -174,6 +175,35 @@ public void entryDeleted(MapEvent<Integer, Integer> evt)
         Eventually.assertDeferred(atomicDelete::get, is(100));
         }
 
+    /**
+     * Test StorageManager size() operation.
+     */
+    @Test
+    public void testSizeOperation()
+        {
+        NamedCache<Integer, Integer> cache = getNamedCache("dist-size");
+        MBeanServer server = MBeanHelper.findMBeanServer();
+
+        for (int i = 0; i < 100; i++)
+            {
+            cache.put(i, i + 1);
+            }
+        assertEquals(100, cache.size());
+        ObjectName name = getQueryName(cache);
+        Eventually.assertDeferred(() ->
+            {
+            try
+                {
+                return (Integer) server.invoke(name, "size", null, null);
+                }
+            catch (Exception e)
+                {
+                Assert.fail(e.getMessage());
+                }
+            return 0;
+            }, is(100));
+        }
+
     /**
      * Test cache truncate operation.
      *