cache counter meta data in both stl and astf mode

Signed-off-by: Leo Ma <[email protected]>

Author: leomaatEric

src/main/java/com/cisco/trex/ClientBase.java

@@ -62,6 +62,7 @@ public abstract class ClientBase {
   protected TRexTransport transport;
   protected String apiH;
   protected String masterHandler;
+  private XstatsNames xstatsNames;
 
   private static Gson buildGson() {
     GsonBuilder gsonBuilder = new GsonBuilder();
@@ -360,9 +361,13 @@ public ExtendedPortStatistics getExtendedPortStatistics(int portIndex) {
   }
 
   private XstatsNames getPortStatNames(int portIndex) {
-    Map<String, Object> parameters = new HashMap<>();
-    parameters.put(PORT_ID, portIndex);
-    return callMethod("get_port_xstats_names", parameters, XstatsNames.class).get();
+    if (xstatsNames == null) {
+      Map<String, Object> parameters = new HashMap<>();
+      parameters.put(PORT_ID, portIndex);
+      xstatsNames = callMethod("get_port_xstats_names", parameters, XstatsNames.class).get();
+    }
+
+    return xstatsNames;
   }
 
   /**

src/main/java/com/cisco/trex/stateful/TRexAstfClient.java

@@ -35,6 +35,7 @@
 public class TRexAstfClient extends ClientBase {
 
   private static final String ASTF = "ASTF";
+  private MetaData counterMetaData;
 
   /**
    * @param host
@@ -359,8 +360,12 @@ public AstfStatistics getAstfTotalStatistics() {
   }
 
   private MetaData getAstfStatsMetaData() {
-    Map<String, Object> payload = createPayload();
-    return callMethod("get_counter_desc", payload, MetaData.class).get();
+    if (counterMetaData == null) {
+      Map<String, Object> payload = createPayload();
+      counterMetaData = callMethod("get_counter_desc", payload, MetaData.class).get();
+    }
+
+    return counterMetaData;
   }
 
   /**