Migrate to Flogger (yellow)

This is a 'yellow' Flogger migration CL. Yellow CLs should be mostly safe
but include changes that are notable for one reason or another. Manual
intervention may be required to address small issues.

The comments in this CL indicate cases where suggested code changes
should be double checked, or even modified. There may even be cases where
files outside this CL are affected by changes to things such as logger
visibility. However if a change does not have an associated comment then
it should be safe.

For more information, see []
Base CL: 197826149

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=198097990

java/google/registry/ui/server/registrar/BUILD

@@ -31,6 +31,8 @@ java_library(
         "@com_google_appengine_api_1_0_sdk",
         "@com_google_code_findbugs_jsr305",
         "@com_google_dagger",
+        "@com_google_flogger",
+        "@com_google_flogger_system_backend",
         "@com_google_guava",
         "@com_google_re2j",
         "@io_bazel_rules_closure//closure/templates",

java/google/registry/ui/server/registrar/SessionUtils.java

@@ -21,7 +21,7 @@ import static google.registry.util.PreconditionsUtils.checkArgumentPresent;
 
 import com.google.appengine.api.users.User;
 import com.google.common.base.Strings;
-import com.google.common.logging.FormattingLogger;
+import com.google.common.flogger.FluentLogger;
 import com.googlecode.objectify.Key;
 import google.registry.config.RegistryConfig.Config;
 import google.registry.model.registrar.Registrar;
@@ -40,7 +40,7 @@ import javax.servlet.http.HttpSession;
 @Immutable
 public class SessionUtils {
 
-  static final FormattingLogger logger = FormattingLogger.getLoggerForCallerClass();
+  private static final FluentLogger logger = FluentLogger.forEnclosingClass();
 
   public static final String CLIENT_ID_ATTRIBUTE = "clientId";
 
@@ -102,11 +102,12 @@ public class SessionUtils {
     // Use the clientId if it exists
     if (clientId != null) {
       if (!hasAccessToRegistrar(clientId, user.getUserId())) {
-        logger.infofmt("Registrar Console access revoked: %s", clientId);
+        logger.atInfo().log("Registrar Console access revoked: %s", clientId);
         session.invalidate();
         return false;
       }
-      logger.infofmt("Associating user %s with given registrar %s.", user.getUserId(), clientId);
+      logger.atInfo().log(
+          "Associating user %s with given registrar %s.", user.getUserId(), clientId);
       return true;
     }
 
@@ -114,7 +115,7 @@ public class SessionUtils {
     Optional<Registrar> registrar = findRegistrarForUser(user.getUserId());
     if (registrar.isPresent()) {
       verify(hasAccessToRegistrar(registrar.get(), user.getUserId()));
-      logger.infofmt(
+      logger.atInfo().log(
           "Associating user %s with found registrar %s.",
           user.getUserId(), registrar.get().getClientId());
       session.setAttribute(CLIENT_ID_ATTRIBUTE, registrar.get().getClientId());
@@ -125,20 +126,20 @@ public class SessionUtils {
     // registryAdminClientId
     if (userAuthInfo.isUserAdmin()) {
       if (Strings.isNullOrEmpty(registryAdminClientId)) {
-        logger.infofmt(
+        logger.atInfo().log(
             "Cannot associate admin user %s with configured client Id."
                 + " ClientId is null or empty.",
             user.getUserId());
         return false;
       }
       if (!Registrar.loadByClientIdCached(registryAdminClientId).isPresent()) {
-        logger.infofmt(
+        logger.atInfo().log(
             "Cannot associate admin user %s with configured client Id %s."
                 + " Registrar does not exist.",
             user.getUserId(), registryAdminClientId);
         return false;
       }
-      logger.infofmt(
+      logger.atInfo().log(
           "User %s is an admin with no associated registrar."
               + " Automatically associating the user with configured client Id %s.",
           user.getUserId(), registryAdminClientId);
@@ -147,7 +148,7 @@ public class SessionUtils {
     }
 
     // We couldn't find any relevant clientId
-    logger.infofmt("User not associated with any Registrar: %s", user.getUserId());
+    logger.atInfo().log("User not associated with any Registrar: %s", user.getUserId());
     return false;
   }
 
@@ -173,7 +174,7 @@ public class SessionUtils {
     String registrarClientId = contact.getParent().getName();
     Optional<Registrar> result = Registrar.loadByClientIdCached(registrarClientId);
     if (!result.isPresent()) {
-      logger.severefmt(
+      logger.atSevere().log(
           "A contact record exists for non-existent registrar: %s.", Key.create(contact));
     }
     return result;
@@ -183,7 +184,7 @@ public class SessionUtils {
   protected static boolean hasAccessToRegistrar(String clientId, final String gaeUserId) {
     Optional<Registrar> registrar = Registrar.loadByClientIdCached(clientId);
     if (!registrar.isPresent()) {
-      logger.warningfmt("Registrar '%s' disappeared from Datastore!", clientId);
+      logger.atWarning().log("Registrar '%s' disappeared from Datastore!", clientId);
       return false;
     }
     return hasAccessToRegistrar(registrar.get(), gaeUserId);