add metrics enable switch

dubbo-common/src/main/java/org/apache/dubbo/config/MetricsConfig.java

@@ -92,6 +92,7 @@ public class MetricsConfig extends AbstractConfig {
      */
     private Boolean useGlobalRegistry;
 
+    private Boolean enableRpc;
 
     public MetricsConfig() {
     }
@@ -214,4 +215,12 @@ public Boolean getUseGlobalRegistry() {
     public void setUseGlobalRegistry(Boolean useGlobalRegistry) {
         this.useGlobalRegistry = useGlobalRegistry;
     }
+
+    public Boolean getEnableRpc() {
+        return enableRpc;
+    }
+
+    public void setEnableRpc(Boolean enableRpc) {
+        this.enableRpc = enableRpc;
+    }
 }

dubbo-config/dubbo-config-spring/src/main/resources/META-INF/dubbo.xsd

@@ -1098,6 +1098,12 @@
                 <xsd:documentation><![CDATA[ Deprecated. No longer use. ]]></xsd:documentation>
             </xsd:annotation>
         </xsd:attribute>
+
+        <xsd:attribute name="enable-rpc" type="xsd:boolean" default="true">
+            <xsd:annotation>
+                <xsd:documentation><![CDATA[ Enable record rpc metrics. ]]></xsd:documentation>
+            </xsd:annotation>
+        </xsd:attribute>
     </xsd:complexType>
 
     <xsd:complexType name="tracingType">

dubbo-metrics/dubbo-metrics-default/src/main/java/org/apache/dubbo/metrics/filter/MetricsFilter.java

@@ -19,6 +19,7 @@
 import org.apache.dubbo.common.extension.Activate;
 import org.apache.dubbo.common.logger.ErrorTypeAwareLogger;
 import org.apache.dubbo.common.logger.LoggerFactory;
+import org.apache.dubbo.config.MetricsConfig;
 import org.apache.dubbo.metrics.event.MetricsEventBus;
 import org.apache.dubbo.metrics.event.RequestEvent;
 import org.apache.dubbo.rpc.BaseFilter;
@@ -40,20 +41,24 @@
 public class MetricsFilter implements Filter, BaseFilter.Listener, ScopeModelAware {
 
     private ApplicationModel applicationModel;
-    private final static ErrorTypeAwareLogger LOGGER = LoggerFactory.getErrorTypeAwareLogger(MetricsFilter.class);
+    private static final ErrorTypeAwareLogger LOGGER = LoggerFactory.getErrorTypeAwareLogger(MetricsFilter.class);
+    private boolean rpcMetricsEnable;
 
     @Override
     public void setApplicationModel(ApplicationModel applicationModel) {
         this.applicationModel = applicationModel;
+        this.rpcMetricsEnable = applicationModel.getApplicationConfigManager().getMetrics().map(MetricsConfig::getEnableRpc).orElse(true);
     }
 
     @Override
     public Result invoke(Invoker<?> invoker, Invocation invocation) throws RpcException {
-        try {
-            RequestEvent requestEvent = RequestEvent.toRequestEvent(applicationModel, invocation);
-            MetricsEventBus.before(requestEvent, () -> invocation.put(METRIC_FILTER_EVENT, requestEvent));
-        } catch (Throwable t) {
-            LOGGER.warn(INTERNAL_ERROR, "", "", "Error occurred when invoke.", t);
+        if (rpcMetricsEnable) {
+            try {
+                RequestEvent requestEvent = RequestEvent.toRequestEvent(applicationModel, invocation);
+                MetricsEventBus.before(requestEvent, () -> invocation.put(METRIC_FILTER_EVENT, requestEvent));
+            } catch (Throwable t) {
+                LOGGER.warn(INTERNAL_ERROR, "", "", "Error occurred when invoke.", t);
+            }
         }
         return invoker.invoke(invocation);
     }
@@ -84,6 +89,4 @@ public void onError(Throwable t, Invoker<?> invoker, Invocation invocation) {
         }
     }
 
-
-
 }

dubbo-metrics/dubbo-metrics-default/src/test/java/org/apache/dubbo/metrics/filter/MetricsFilterTest.java

@@ -82,7 +82,6 @@ public void setup() {
         config.setName("MockMetrics");
         applicationModel = ApplicationModel.defaultModel();
         applicationModel.getApplicationConfigManager().setApplication(config);
-
         invocation = new RpcInvocation();
         filter = new MetricsFilter();