Bigtable: expose credential provider as a toplevel setting

google-cloud-clients/google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/admin/v2/BigtableInstanceAdminSettings.java

@@ -15,6 +15,7 @@
  */
 package com.google.cloud.bigtable.admin.v2;
 
+import com.google.api.gax.core.CredentialsProvider;
 import com.google.cloud.bigtable.admin.v2.stub.BigtableInstanceAdminStubSettings;
 import com.google.common.base.Preconditions;
 import com.google.common.base.Verify;
@@ -60,6 +61,11 @@ public String getProjectId() {
     return projectId;
   }
 
+  /** Gets the CredentialsProvider to use for getting the credentials to make calls with. */
+  public CredentialsProvider getCredentialsProvider() {
+    return stubSettings.getCredentialsProvider();
+  }
+
   /** Gets the underlying RPC settings. */
   @Nonnull
   public BigtableInstanceAdminStubSettings getStubSettings() {
@@ -103,6 +109,18 @@ public String getProjectId() {
       return projectId;
     }
 
+    /** Sets the CredentialsProvider to use for getting the credentials to make calls with. */
+    public Builder setCredentialsProvider(CredentialsProvider credentialsProvider) {
+      stubSettings.setCredentialsProvider(credentialsProvider);
+
+      return this;
+    }
+
+    /** Gets the CredentialsProvider to use for getting the credentials to make calls with. */
+    public CredentialsProvider getCredentialsProvider() {
+      return stubSettings.getCredentialsProvider();
+    }
+
     /**
      * Returns the builder for the settings used for all RPCs.
      *

google-cloud-clients/google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/admin/v2/BigtableTableAdminSettings.java

@@ -16,6 +16,7 @@
 package com.google.cloud.bigtable.admin.v2;
 
 import com.google.api.core.ApiFunction;
+import com.google.api.gax.core.CredentialsProvider;
 import com.google.api.gax.core.NoCredentialsProvider;
 import com.google.api.gax.grpc.InstantiatingGrpcChannelProvider;
 import com.google.cloud.bigtable.admin.v2.stub.BigtableTableAdminStubSettings;
@@ -68,6 +69,11 @@ public String getInstanceId() {
     return instanceId;
   }
 
+  /** Gets the CredentialsProvider to use for getting the credentials to make calls with. */
+  public CredentialsProvider getCredentialsProvider() {
+    return stubSettings.getCredentialsProvider();
+  }
+
   /** Gets the underlying RPC settings. */
   public BigtableTableAdminStubSettings getStubSettings() {
     return stubSettings;
@@ -148,6 +154,17 @@ public String getInstanceId() {
       return instanceId;
     }
 
+    /** Sets the CredentialsProvider to use for getting the credentials to make calls with. */
+    public Builder setCredentialsProvider(CredentialsProvider credentialsProvider) {
+      stubSettings.setCredentialsProvider(credentialsProvider);
+      return this;
+    }
+
+    /** Gets the CredentialsProvider to use for getting the credentials to make calls with. */
+    public CredentialsProvider getCredentialsProvider() {
+      return stubSettings.getCredentialsProvider();
+    }
+
     /**
      * Returns the builder for the settings used for all RPCs.
      *

google-cloud-clients/google-cloud-bigtable/src/test/java/com/google/cloud/bigtable/admin/v2/BigtableInstanceAdminSettingsTest.java

@@ -17,16 +17,18 @@
 
 import static com.google.common.truth.Truth.assertThat;
 
+import com.google.api.gax.core.CredentialsProvider;
 import com.google.api.gax.rpc.StatusCode.Code;
-import com.google.cloud.bigtable.admin.v2.BigtableInstanceAdminSettings.Builder;
 import java.io.IOException;
 import org.junit.Test;
+import org.mockito.Mockito;
 
 public class BigtableInstanceAdminSettingsTest {
   @Test
   public void testProjectName() throws Exception {
     String projectId = "my-project";
-    Builder builder = BigtableInstanceAdminSettings.newBuilder().setProjectId(projectId);
+    BigtableInstanceAdminSettings.Builder builder =
+        BigtableInstanceAdminSettings.newBuilder().setProjectId(projectId);
 
     assertThat(builder.getProjectId()).isEqualTo(projectId);
     assertThat(builder.build().getProjectId()).isEqualTo(projectId);
@@ -37,7 +39,8 @@ public void testProjectName() throws Exception {
   public void testMissingProjectName() {
     Exception actualException = null;
 
-    Builder settingsBuilder = BigtableInstanceAdminSettings.newBuilder();
+    BigtableInstanceAdminSettings.Builder settingsBuilder =
+        BigtableInstanceAdminSettings.newBuilder();
     assertThat(settingsBuilder.getProjectId()).isNull();
 
     try {
@@ -49,6 +52,22 @@ public void testMissingProjectName() {
     assertThat(actualException).isInstanceOf(NullPointerException.class);
   }
 
+  @Test
+  public void testCredentials() throws IOException {
+    CredentialsProvider credentialsProvider = Mockito.mock(CredentialsProvider.class);
+
+    BigtableInstanceAdminSettings settings =
+        BigtableInstanceAdminSettings.newBuilder()
+            .setProjectId("my-project")
+            .setCredentialsProvider(credentialsProvider)
+            .build();
+
+    assertThat(settings.getCredentialsProvider()).isSameAs(credentialsProvider);
+    assertThat(settings.getStubSettings().getCredentialsProvider()).isSameAs(credentialsProvider);
+    assertThat(settings.toBuilder().getCredentialsProvider()).isSameAs(credentialsProvider);
+    assertThat(settings.toBuilder().build().getCredentialsProvider()).isSameAs(credentialsProvider);
+  }
+
   @Test
   public void testStubSettings() throws IOException {
     String projectId = "my-project";

google-cloud-clients/google-cloud-bigtable/src/test/java/com/google/cloud/bigtable/admin/v2/BigtableTableAdminSettingsTest.java

@@ -17,9 +17,11 @@
 
 import static com.google.common.truth.Truth.assertThat;
 
+import com.google.api.gax.core.CredentialsProvider;
 import com.google.api.gax.rpc.StatusCode.Code;
 import java.io.IOException;
 import org.junit.Test;
+import org.mockito.Mockito;
 
 public class BigtableTableAdminSettingsTest {
 
@@ -51,6 +53,23 @@ public void testMissingInstanceName() {
     assertThat(actualException).isInstanceOf(NullPointerException.class);
   }
 
+  @Test
+  public void testCredentials() throws IOException {
+    CredentialsProvider credentialsProvider = Mockito.mock(CredentialsProvider.class);
+
+    BigtableTableAdminSettings settings =
+        BigtableTableAdminSettings.newBuilder()
+            .setProjectId("my-project")
+            .setInstanceId("my-instance")
+            .setCredentialsProvider(credentialsProvider)
+            .build();
+
+    assertThat(settings.getCredentialsProvider()).isSameAs(credentialsProvider);
+    assertThat(settings.getStubSettings().getCredentialsProvider()).isSameAs(credentialsProvider);
+    assertThat(settings.toBuilder().getCredentialsProvider()).isSameAs(credentialsProvider);
+    assertThat(settings.toBuilder().build().getCredentialsProvider()).isSameAs(credentialsProvider);
+  }
+
   @Test
   public void testStubSettings() throws IOException {
     BigtableTableAdminSettings.Builder builder =