add flag to disable view name collection

Author: vandonr

dd-java-agent/instrumentation/spring/spring-webmvc/spring-webmvc-6.0/src/main/java17/datadog/trace/instrumentation/springweb6/SpringWebHttpServerDecorator.java

@@ -3,6 +3,7 @@
 import static datadog.trace.bootstrap.instrumentation.decorator.http.HttpResourceDecorator.HTTP_RESOURCE_DECORATOR;
 
 import datadog.context.Context;
+import datadog.trace.bootstrap.config.provider.ConfigProvider;
 import datadog.trace.bootstrap.instrumentation.api.AgentPropagation;
 import datadog.trace.bootstrap.instrumentation.api.AgentSpan;
 import datadog.trace.bootstrap.instrumentation.api.URIDataAdapter;
@@ -27,6 +28,8 @@ public class SpringWebHttpServerDecorator
   // source for limits: https://docs.datadoghq.com/tracing/troubleshooting
   static final int VIEW_NAME_RESOURCE_LIMIT = 5_000;
   static final int VIEW_NAME_TAG_LIMIT = 25_000;
+  private static final boolean VIEW_NAME_ENABLED =
+      ConfigProvider.getInstance().getBoolean("trace.spring-web.view-name.enabled", true);
 
   private static final CharSequence SPRING_HANDLER = UTF8BytesString.create("spring.handler");
   public static final CharSequence RESPONSE_RENDER = UTF8BytesString.create("response.render");
@@ -151,10 +154,12 @@ private String getMethodName(final Object handler) {
   }
 
   public AgentSpan onRender(final AgentSpan span, final ModelAndView mv) {
-    final String viewName = mv.getViewName();
-    if (viewName != null) {
-      span.setTag("view.name", Strings.truncate(viewName, VIEW_NAME_TAG_LIMIT));
-      span.setResourceName(Strings.truncate(viewName, VIEW_NAME_RESOURCE_LIMIT));
+    if (VIEW_NAME_ENABLED) {
+      final String viewName = mv.getViewName();
+      if (viewName != null) {
+        span.setTag("view.name", Strings.truncate(viewName, VIEW_NAME_TAG_LIMIT));
+        span.setResourceName(Strings.truncate(viewName, VIEW_NAME_RESOURCE_LIMIT));
+      }
     }
     if (mv.getView() != null) {
       span.setTag("view.type", className(mv.getView().getClass()));