fix name state of the world

xds/src/main/java/io/grpc/xds/XdsClientImpl.java

@@ -428,7 +428,7 @@ private <T extends ResourceUpdate> void handleResourceUpdate(XdsResourceType.Arg
       }
 
       // Nothing else to do for incremental ADS resources.
-      if (!xdsResourceType.isStateOfTheWorld()) {
+      if (!xdsResourceType.isFullStateOfTheWorld()) {
         continue;
       }
 
@@ -608,7 +608,7 @@ void onAbsent() {
       // and the resource is reusable.
       boolean ignoreResourceDeletionEnabled =
           serverInfo != null && serverInfo.ignoreResourceDeletion();
-      if (ignoreResourceDeletionEnabled && type.isStateOfTheWorld() && data != null) {
+      if (ignoreResourceDeletionEnabled && type.isFullStateOfTheWorld() && data != null) {
         if (!resourceDeletionIgnored) {
           logger.log(XdsLogLevel.FORCE_WARNING,
               "xds server {0}: ignoring deletion for resource type {1} name {2}}",

xds/src/main/java/io/grpc/xds/XdsClusterResource.java

@@ -89,7 +89,7 @@ String typeUrlV2() {
   }
 
   @Override
-  boolean isStateOfTheWorld() {
+  boolean isFullStateOfTheWorld() {
     return true;
   }
 

xds/src/main/java/io/grpc/xds/XdsEndpointResource.java

@@ -79,7 +79,7 @@ String typeUrlV2() {
   }
 
   @Override
-  boolean isStateOfTheWorld() {
+  boolean isFullStateOfTheWorld() {
     return false;
   }
 

xds/src/main/java/io/grpc/xds/XdsListenerResource.java

@@ -98,7 +98,7 @@ String typeUrlV2() {
   }
 
   @Override
-  boolean isStateOfTheWorld() {
+  boolean isFullStateOfTheWorld() {
     return true;
   }
 

xds/src/main/java/io/grpc/xds/XdsResourceType.java

@@ -85,7 +85,12 @@ abstract class XdsResourceType<T extends ResourceUpdate> {
 
   abstract String typeUrlV2();
 
-  abstract boolean isStateOfTheWorld();
+  // Do not confuse with the SotW approach: it is the mechanism in which the client must specify all
+  // resource names it is interested in with each request. Different resource types may behave
+  // differently in this approach. For LDS and CDS resources, the server must return all resources
+  // that the client has subscribed to in each request. For RDS and EDS, the server may only return
+  // the resources that need an update.
+  abstract boolean isFullStateOfTheWorld();
 
   static class Args {
     final ServerInfo serverInfo;

xds/src/main/java/io/grpc/xds/XdsRouteConfigureResource.java

@@ -108,7 +108,7 @@ String typeUrlV2() {
   }
 
   @Override
-  boolean isStateOfTheWorld() {
+  boolean isFullStateOfTheWorld() {
     return false;
   }