feat: Remove setting the default endpoint in StubSettings

gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/comment/SettingsCommentComposer.java

@@ -52,6 +52,9 @@ public class SettingsCommentComposer {
   private static final String CLASS_HEADER_DEFAULTS_RETRIES_DESCRIPTION =
       "Retries are configured for idempotent methods but not for non-idempotent methods.";
 
+  public static final CommentStatement GET_ENDPOINT_COMMENT =
+      toSimpleComment(
+          "Returns the endpoint set by the user or the the service's default endpoint.");
   public static final CommentStatement DEFAULT_SCOPES_COMMENT =
       toSimpleComment("The default scopes of the service.");
 

gapic-generator-java/src/main/java/com/google/api/generator/gapic/composer/common/AbstractServiceStubSettingsClassComposer.java

@@ -1007,6 +1007,7 @@ private List<MethodDefinition> createClassMethods(
     javaMethods.addAll(
         createMethodSettingsGetterMethods(methodSettingsMemberVarExprs, deprecatedSettingVarNames));
     javaMethods.add(createCreateStubMethod(service, typeStore));
+    javaMethods.add(createGetEndpointMethod());
     javaMethods.addAll(createDefaultHelperAndGetterMethods(service, typeStore));
     javaMethods.addAll(
         createNewBuilderMethods(
@@ -1020,6 +1021,45 @@ private List<MethodDefinition> createClassMethods(
     return javaMethods;
   }
 
+  // Helper method to create the getEndpoint method in the ServiceStubSettings class
+  private MethodDefinition createGetEndpointMethod() {
+    Expr getEndpointExpr =
+        MethodInvocationExpr.builder()
+            .setMethodName("getEndpoint")
+            .setExprReferenceExpr(
+                ValueExpr.withValue(
+                    SuperObjectValue.withType(
+                        TypeNode.withReference(ConcreteReference.withClazz(StubSettings.class)))))
+            .setReturnType(TypeNode.STRING)
+            .build();
+    Expr isNotNullCheck =
+        RelationalOperationExpr.notEqualToWithExprs(getEndpointExpr, ValueExpr.createNullExpr());
+
+    IfStatement ifStatement =
+        IfStatement.builder()
+            .setConditionExpr(isNotNullCheck)
+            .setBody(ImmutableList.of(ExprStatement.withExpr(ReturnExpr.withExpr(getEndpointExpr))))
+            .build();
+
+    Expr getDefaultEndpointExpr =
+        MethodInvocationExpr.builder()
+            .setMethodName("getDefaultEndpoint")
+            .setReturnType(TypeNode.STRING)
+            .build();
+    ReturnExpr returnExpr = ReturnExpr.withExpr(getDefaultEndpointExpr);
+
+    return MethodDefinition.builder()
+        .setHeaderCommentStatements(SettingsCommentComposer.GET_ENDPOINT_COMMENT)
+        .setScope(ScopeNode.PUBLIC)
+        .setIsStatic(false)
+        .setAnnotations(ImmutableList.of(AnnotationNode.OVERRIDE))
+        .setReturnType(TypeNode.STRING)
+        .setName("getEndpoint")
+        .setBody(ImmutableList.of(ifStatement))
+        .setReturnExpr(returnExpr)
+        .build();
+  }
+
   private static List<MethodDefinition> createMethodSettingsGetterMethods(
       Map<String, VariableExpr> methodSettingsMemberVarExprs,
       final Set<String> deprecatedSettingVarNames) {
@@ -1465,6 +1505,7 @@ private List<MethodDefinition> createNestedClassMethods(
     nestedClassMethods.addAll(
         createNestedClassSettingsBuilderGetterMethods(
             nestedMethodSettingsMemberVarExprs, nestedDeprecatedSettingVarNames));
+    nestedClassMethods.add(createGetEndpointMethod());
     nestedClassMethods.add(createNestedClassBuildMethod(service, typeStore));
     return nestedClassMethods;
   }
@@ -1895,14 +1936,6 @@ protected MethodDefinition createNestedClassCreateDefaultMethod(
                     .setMethodName("build")
                     .build())
             .build());
-
-    bodyExprs.add(
-        MethodInvocationExpr.builder()
-            .setExprReferenceExpr(builderVarExpr)
-            .setMethodName("setEndpoint")
-            .setArguments(
-                MethodInvocationExpr.builder().setMethodName("getDefaultEndpoint").build())
-            .build());
     bodyExprs.add(
         MethodInvocationExpr.builder()
             .setExprReferenceExpr(builderVarExpr)

gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/DeprecatedServiceStubSettings.golden

@@ -102,6 +102,15 @@ public class DeprecatedServiceStubSettings extends StubSettings<DeprecatedServic
             "Transport not supported: %s", getTransportChannelProvider().getTransportName()));
   }
 
+  /** Returns the endpoint set by the user or the the service's default endpoint. */
+  @Override
+  public String getEndpoint() {
+    if (super.getEndpoint() != null) {
+      return super.getEndpoint();
+    }
+    return getDefaultEndpoint();
+  }
+
   /** Returns a builder for the default ExecutorProvider for this service. */
   public static InstantiatingExecutorProvider.Builder defaultExecutorProviderBuilder() {
     return InstantiatingExecutorProvider.newBuilder();
@@ -235,7 +244,6 @@ public class DeprecatedServiceStubSettings extends StubSettings<DeprecatedServic
       builder.setTransportChannelProvider(defaultTransportChannelProvider());
       builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
       builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
-      builder.setEndpoint(getDefaultEndpoint());
       builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
       builder.setSwitchToMtlsEndpointAllowed(true);
 
@@ -286,6 +294,15 @@ public class DeprecatedServiceStubSettings extends StubSettings<DeprecatedServic
       return slowFibonacciSettings;
     }
 
+    /** Returns the endpoint set by the user or the the service's default endpoint. */
+    @Override
+    public String getEndpoint() {
+      if (super.getEndpoint() != null) {
+        return super.getEndpoint();
+      }
+      return getDefaultEndpoint();
+    }
+
     @Override
     public DeprecatedServiceStubSettings build() throws IOException {
       return new DeprecatedServiceStubSettings(this);

gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/EchoStubSettings.golden

@@ -285,6 +285,15 @@ public class EchoStubSettings extends StubSettings<EchoStubSettings> {
             "Transport not supported: %s", getTransportChannelProvider().getTransportName()));
   }
 
+  /** Returns the endpoint set by the user or the the service's default endpoint. */
+  @Override
+  public String getEndpoint() {
+    if (super.getEndpoint() != null) {
+      return super.getEndpoint();
+    }
+    return getDefaultEndpoint();
+  }
+
   /** Returns a builder for the default ExecutorProvider for this service. */
   public static InstantiatingExecutorProvider.Builder defaultExecutorProviderBuilder() {
     return InstantiatingExecutorProvider.newBuilder();
@@ -484,7 +493,6 @@ public class EchoStubSettings extends StubSettings<EchoStubSettings> {
       builder.setTransportChannelProvider(defaultTransportChannelProvider());
       builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
       builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
-      builder.setEndpoint(getDefaultEndpoint());
       builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
       builder.setSwitchToMtlsEndpointAllowed(true);
 
@@ -630,6 +638,15 @@ public class EchoStubSettings extends StubSettings<EchoStubSettings> {
       return collideNameSettings;
     }
 
+    /** Returns the endpoint set by the user or the the service's default endpoint. */
+    @Override
+    public String getEndpoint() {
+      if (super.getEndpoint() != null) {
+        return super.getEndpoint();
+      }
+      return getDefaultEndpoint();
+    }
+
     @Override
     public EchoStubSettings build() throws IOException {
       return new EchoStubSettings(this);

gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/LoggingServiceV2StubSettings.golden

@@ -422,6 +422,15 @@ public class LoggingServiceV2StubSettings extends StubSettings<LoggingServiceV2S
             "Transport not supported: %s", getTransportChannelProvider().getTransportName()));
   }
 
+  /** Returns the endpoint set by the user or the the service's default endpoint. */
+  @Override
+  public String getEndpoint() {
+    if (super.getEndpoint() != null) {
+      return super.getEndpoint();
+    }
+    return getDefaultEndpoint();
+  }
+
   /** Returns the default service name. */
   @Override
   public String getServiceName() {
@@ -626,7 +635,6 @@ public class LoggingServiceV2StubSettings extends StubSettings<LoggingServiceV2S
       builder.setTransportChannelProvider(defaultTransportChannelProvider());
       builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
       builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
-      builder.setEndpoint(getDefaultEndpoint());
       builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
       builder.setSwitchToMtlsEndpointAllowed(true);
 
@@ -732,6 +740,15 @@ public class LoggingServiceV2StubSettings extends StubSettings<LoggingServiceV2S
       return tailLogEntriesSettings;
     }
 
+    /** Returns the endpoint set by the user or the the service's default endpoint. */
+    @Override
+    public String getEndpoint() {
+      if (super.getEndpoint() != null) {
+        return super.getEndpoint();
+      }
+      return getDefaultEndpoint();
+    }
+
     @Override
     public LoggingServiceV2StubSettings build() throws IOException {
       return new LoggingServiceV2StubSettings(this);

gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpc/goldens/PublisherStubSettings.golden

@@ -431,6 +431,15 @@ public class PublisherStubSettings extends StubSettings<PublisherStubSettings> {
             "Transport not supported: %s", getTransportChannelProvider().getTransportName()));
   }
 
+  /** Returns the endpoint set by the user or the the service's default endpoint. */
+  @Override
+  public String getEndpoint() {
+    if (super.getEndpoint() != null) {
+      return super.getEndpoint();
+    }
+    return getDefaultEndpoint();
+  }
+
   /** Returns the default service name. */
   @Override
   public String getServiceName() {
@@ -667,7 +676,6 @@ public class PublisherStubSettings extends StubSettings<PublisherStubSettings> {
       builder.setTransportChannelProvider(defaultTransportChannelProvider());
       builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
       builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
-      builder.setEndpoint(getDefaultEndpoint());
       builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
       builder.setSwitchToMtlsEndpointAllowed(true);
 
@@ -804,6 +812,15 @@ public class PublisherStubSettings extends StubSettings<PublisherStubSettings> {
       return detachSubscriptionSettings;
     }
 
+    /** Returns the endpoint set by the user or the the service's default endpoint. */
+    @Override
+    public String getEndpoint() {
+      if (super.getEndpoint() != null) {
+        return super.getEndpoint();
+      }
+      return getDefaultEndpoint();
+    }
+
     @Override
     public PublisherStubSettings build() throws IOException {
       return new PublisherStubSettings(this);

gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpcrest/goldens/EchoStubSettings.golden

@@ -301,6 +301,15 @@ public class EchoStubSettings extends StubSettings<EchoStubSettings> {
             "Transport not supported: %s", getTransportChannelProvider().getTransportName()));
   }
 
+  /** Returns the endpoint set by the user or the the service's default endpoint. */
+  @Override
+  public String getEndpoint() {
+    if (super.getEndpoint() != null) {
+      return super.getEndpoint();
+    }
+    return getDefaultEndpoint();
+  }
+
   /** Returns a builder for the default ExecutorProvider for this service. */
   public static InstantiatingExecutorProvider.Builder defaultExecutorProviderBuilder() {
     return InstantiatingExecutorProvider.newBuilder();
@@ -512,7 +521,6 @@ public class EchoStubSettings extends StubSettings<EchoStubSettings> {
       builder.setTransportChannelProvider(defaultTransportChannelProvider());
       builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
       builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
-      builder.setEndpoint(getDefaultEndpoint());
       builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
       builder.setSwitchToMtlsEndpointAllowed(true);
 
@@ -525,7 +533,6 @@ public class EchoStubSettings extends StubSettings<EchoStubSettings> {
       builder.setTransportChannelProvider(defaultHttpJsonTransportProviderBuilder().build());
       builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
       builder.setInternalHeaderProvider(defaultHttpJsonApiClientHeaderProviderBuilder().build());
-      builder.setEndpoint(getDefaultEndpoint());
       builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
       builder.setSwitchToMtlsEndpointAllowed(true);
 
@@ -691,6 +698,15 @@ public class EchoStubSettings extends StubSettings<EchoStubSettings> {
       return updateCaseSettings;
     }
 
+    /** Returns the endpoint set by the user or the the service's default endpoint. */
+    @Override
+    public String getEndpoint() {
+      if (super.getEndpoint() != null) {
+        return super.getEndpoint();
+      }
+      return getDefaultEndpoint();
+    }
+
     @Override
     public EchoStubSettings build() throws IOException {
       return new EchoStubSettings(this);

gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/grpcrest/goldens/WickedStubSettings.golden

@@ -99,6 +99,15 @@ public class WickedStubSettings extends StubSettings<WickedStubSettings> {
             "Transport not supported: %s", getTransportChannelProvider().getTransportName()));
   }
 
+  /** Returns the endpoint set by the user or the the service's default endpoint. */
+  @Override
+  public String getEndpoint() {
+    if (super.getEndpoint() != null) {
+      return super.getEndpoint();
+    }
+    return getDefaultEndpoint();
+  }
+
   /** Returns a builder for the default ExecutorProvider for this service. */
   public static InstantiatingExecutorProvider.Builder defaultExecutorProviderBuilder() {
     return InstantiatingExecutorProvider.newBuilder();
@@ -231,7 +240,6 @@ public class WickedStubSettings extends StubSettings<WickedStubSettings> {
       builder.setTransportChannelProvider(defaultTransportChannelProvider());
       builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
       builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
-      builder.setEndpoint(getDefaultEndpoint());
       builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
       builder.setSwitchToMtlsEndpointAllowed(true);
 
@@ -277,6 +285,15 @@ public class WickedStubSettings extends StubSettings<WickedStubSettings> {
       return persuadeEvilPlanSettings;
     }
 
+    /** Returns the endpoint set by the user or the the service's default endpoint. */
+    @Override
+    public String getEndpoint() {
+      if (super.getEndpoint() != null) {
+        return super.getEndpoint();
+      }
+      return getDefaultEndpoint();
+    }
+
     @Override
     public WickedStubSettings build() throws IOException {
       return new WickedStubSettings(this);

gapic-generator-java/src/test/java/com/google/api/generator/gapic/composer/rest/goldens/ComplianceStubSettings.golden

@@ -131,6 +131,15 @@ public class ComplianceStubSettings extends StubSettings<ComplianceStubSettings>
             "Transport not supported: %s", getTransportChannelProvider().getTransportName()));
   }
 
+  /** Returns the endpoint set by the user or the the service's default endpoint. */
+  @Override
+  public String getEndpoint() {
+    if (super.getEndpoint() != null) {
+      return super.getEndpoint();
+    }
+    return getDefaultEndpoint();
+  }
+
   /** Returns a builder for the default ExecutorProvider for this service. */
   public static InstantiatingExecutorProvider.Builder defaultExecutorProviderBuilder() {
     return InstantiatingExecutorProvider.newBuilder();
@@ -302,7 +311,6 @@ public class ComplianceStubSettings extends StubSettings<ComplianceStubSettings>
       builder.setTransportChannelProvider(defaultTransportChannelProvider());
       builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
       builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
-      builder.setEndpoint(getDefaultEndpoint());
       builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
       builder.setSwitchToMtlsEndpointAllowed(true);
 
@@ -410,6 +418,15 @@ public class ComplianceStubSettings extends StubSettings<ComplianceStubSettings>
       return verifyEnumSettings;
     }
 
+    /** Returns the endpoint set by the user or the the service's default endpoint. */
+    @Override
+    public String getEndpoint() {
+      if (super.getEndpoint() != null) {
+        return super.getEndpoint();
+      }
+      return getDefaultEndpoint();
+    }
+
     @Override
     public ComplianceStubSettings build() throws IOException {
       return new ComplianceStubSettings(this);

gax-java/gax/src/main/java/com/google/api/gax/rpc/StubSettings.java

@@ -153,7 +153,7 @@ public final String getUniverseDomain() {
     return universeDomain;
   }
 
-  public final String getEndpoint() {
+  public String getEndpoint() {
     return endpoint;
   }