feat: Enable REST transport for most of Java and Go clients

.kokoro/dependencies.sh

@@ -66,11 +66,11 @@ function completenessCheck() {
   # This is stripped from the output as it is not present in the flattened pom.
   # Only dependencies with 'compile' or 'runtime' scope are included from original dependency list.
   msg "Generating dependency list using original pom..."
-  mvn dependency:list -f pom.xml -DincludeScope=runtime -Dsort=true | grep '\[INFO]    .*:.*:.*:.*:.*' | sed -e 's/ --.*//' >.org-list.txt
+  mvn dependency:list -f pom.xml -DexcludeArtifactIds=commons-codec,commons-logging,opencensus-api,opencensus-contrib-http-util,httpclient,httpcore -DincludeScope=runtime -Dsort=true | grep '\[INFO]    .*:.*:.*:.*:.*' | sed -e 's/ --.*//' >.org-list.txt
 
   # Output dep list generated using the flattened pom (only 'compile' and 'runtime' scopes)
   msg "Generating dependency list using flattened pom..."
-  mvn dependency:list -f .flattened-pom.xml -DincludeScope=runtime -Dsort=true | grep '\[INFO]    .*:.*:.*:.*:.*' >.new-list.txt
+  mvn dependency:list -f .flattened-pom.xml -DexcludeArtifactIds=commons-codec,commons-logging,opencensus-api,opencensus-contrib-http-util,httpclient,httpcore -DincludeScope=runtime -Dsort=true | grep '\[INFO]    .*:.*:.*:.*:.*' >.new-list.txt
 
   # Compare two dependency lists
   msg "Comparing dependency lists..."

google-cloud-binary-authorization/pom.xml

@@ -62,6 +62,10 @@
       <groupId>com.google.api</groupId>
       <artifactId>gax-grpc</artifactId>
     </dependency>
+    <dependency>
+      <groupId>com.google.api</groupId>
+      <artifactId>gax-httpjson</artifactId>
+    </dependency>
     <dependency>
       <groupId>org.threeten</groupId>
       <artifactId>threetenbp</artifactId>
@@ -91,12 +95,24 @@
       <scope>test</scope>
     </dependency>
     <!-- Need testing utility classes for generated gRPC clients tests -->
+    <dependency>
+      <groupId>com.google.api</groupId>
+      <artifactId>gax</artifactId>
+      <classifier>testlib</classifier>
+      <scope>test</scope>
+    </dependency>
     <dependency>
       <groupId>com.google.api</groupId>
       <artifactId>gax-grpc</artifactId>
       <classifier>testlib</classifier>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>com.google.api</groupId>
+      <artifactId>gax-httpjson</artifactId>
+      <classifier>testlib</classifier>
+      <scope>test</scope>
+    </dependency>
   </dependencies>
 
   <profiles>

google-cloud-binary-authorization/src/main/java/com/google/cloud/binaryauthorization/v1beta1/BinauthzManagementServiceV1Beta1Client.java

@@ -110,6 +110,22 @@
  *     BinauthzManagementServiceV1Beta1Client.create(binauthzManagementServiceV1Beta1Settings);
  * }</pre>
  *
+ * <p>To use REST (HTTP1.1/JSON) transport (instead of gRPC) for sending and receiving requests over
+ * the wire:
+ *
+ * <pre>{@code
+ * // This snippet has been automatically generated for illustrative purposes only.
+ * // It may require modifications to work in your environment.
+ * BinauthzManagementServiceV1Beta1Settings binauthzManagementServiceV1Beta1Settings =
+ *     BinauthzManagementServiceV1Beta1Settings.newBuilder()
+ *         .setTransportChannelProvider(
+ *             BinauthzManagementServiceV1Beta1Settings.defaultHttpJsonTransportProviderBuilder()
+ *                 .build())
+ *         .build();
+ * BinauthzManagementServiceV1Beta1Client binauthzManagementServiceV1Beta1Client =
+ *     BinauthzManagementServiceV1Beta1Client.create(binauthzManagementServiceV1Beta1Settings);
+ * }</pre>
+ *
  * <p>Please refer to the GitHub repository's samples for more quickstart code snippets.
  */
 @BetaApi

google-cloud-binary-authorization/src/main/java/com/google/cloud/binaryauthorization/v1beta1/BinauthzManagementServiceV1Beta1Settings.java

@@ -23,6 +23,7 @@
 import com.google.api.gax.core.GoogleCredentialsProvider;
 import com.google.api.gax.core.InstantiatingExecutorProvider;
 import com.google.api.gax.grpc.InstantiatingGrpcChannelProvider;
+import com.google.api.gax.httpjson.InstantiatingHttpJsonChannelProvider;
 import com.google.api.gax.rpc.ApiClientHeaderProvider;
 import com.google.api.gax.rpc.ClientContext;
 import com.google.api.gax.rpc.ClientSettings;
@@ -143,11 +144,18 @@ public static GoogleCredentialsProvider.Builder defaultCredentialsProviderBuilde
     return BinauthzManagementServiceV1Beta1StubSettings.defaultCredentialsProviderBuilder();
   }
 
-  /** Returns a builder for the default ChannelProvider for this service. */
+  /** Returns a builder for the default gRPC ChannelProvider for this service. */
   public static InstantiatingGrpcChannelProvider.Builder defaultGrpcTransportProviderBuilder() {
     return BinauthzManagementServiceV1Beta1StubSettings.defaultGrpcTransportProviderBuilder();
   }
 
+  /** Returns a builder for the default REST ChannelProvider for this service. */
+  @BetaApi
+  public static InstantiatingHttpJsonChannelProvider.Builder
+      defaultHttpJsonTransportProviderBuilder() {
+    return BinauthzManagementServiceV1Beta1StubSettings.defaultHttpJsonTransportProviderBuilder();
+  }
+
   public static TransportChannelProvider defaultTransportChannelProvider() {
     return BinauthzManagementServiceV1Beta1StubSettings.defaultTransportChannelProvider();
   }
@@ -157,11 +165,17 @@ public static ApiClientHeaderProvider.Builder defaultApiClientHeaderProviderBuil
     return BinauthzManagementServiceV1Beta1StubSettings.defaultApiClientHeaderProviderBuilder();
   }
 
-  /** Returns a new builder for this class. */
+  /** Returns a new gRPC builder for this class. */
   public static Builder newBuilder() {
     return Builder.createDefault();
   }
 
+  /** Returns a new REST builder for this class. */
+  @BetaApi
+  public static Builder newHttpJsonBuilder() {
+    return Builder.createHttpJsonDefault();
+  }
+
   /** Returns a new builder for this class. */
   public static Builder newBuilder(ClientContext clientContext) {
     return new Builder(clientContext);
@@ -200,6 +214,11 @@ private static Builder createDefault() {
       return new Builder(BinauthzManagementServiceV1Beta1StubSettings.newBuilder());
     }
 
+    @BetaApi
+    private static Builder createHttpJsonDefault() {
+      return new Builder(BinauthzManagementServiceV1Beta1StubSettings.newHttpJsonBuilder());
+    }
+
     public BinauthzManagementServiceV1Beta1StubSettings.Builder getStubSettingsBuilder() {
       return ((BinauthzManagementServiceV1Beta1StubSettings.Builder) getStubSettings());
     }

google-cloud-binary-authorization/src/main/java/com/google/cloud/binaryauthorization/v1beta1/SystemPolicyV1Beta1Client.java

@@ -92,6 +92,21 @@
  *     SystemPolicyV1Beta1Client.create(systemPolicyV1Beta1Settings);
  * }</pre>
  *
+ * <p>To use REST (HTTP1.1/JSON) transport (instead of gRPC) for sending and receiving requests over
+ * the wire:
+ *
+ * <pre>{@code
+ * // This snippet has been automatically generated for illustrative purposes only.
+ * // It may require modifications to work in your environment.
+ * SystemPolicyV1Beta1Settings systemPolicyV1Beta1Settings =
+ *     SystemPolicyV1Beta1Settings.newBuilder()
+ *         .setTransportChannelProvider(
+ *             SystemPolicyV1Beta1Settings.defaultHttpJsonTransportProviderBuilder().build())
+ *         .build();
+ * SystemPolicyV1Beta1Client systemPolicyV1Beta1Client =
+ *     SystemPolicyV1Beta1Client.create(systemPolicyV1Beta1Settings);
+ * }</pre>
+ *
  * <p>Please refer to the GitHub repository's samples for more quickstart code snippets.
  */
 @BetaApi

google-cloud-binary-authorization/src/main/java/com/google/cloud/binaryauthorization/v1beta1/SystemPolicyV1Beta1Settings.java

@@ -21,6 +21,7 @@
 import com.google.api.gax.core.GoogleCredentialsProvider;
 import com.google.api.gax.core.InstantiatingExecutorProvider;
 import com.google.api.gax.grpc.InstantiatingGrpcChannelProvider;
+import com.google.api.gax.httpjson.InstantiatingHttpJsonChannelProvider;
 import com.google.api.gax.rpc.ApiClientHeaderProvider;
 import com.google.api.gax.rpc.ClientContext;
 import com.google.api.gax.rpc.ClientSettings;
@@ -101,11 +102,18 @@ public static GoogleCredentialsProvider.Builder defaultCredentialsProviderBuilde
     return SystemPolicyV1Beta1StubSettings.defaultCredentialsProviderBuilder();
   }
 
-  /** Returns a builder for the default ChannelProvider for this service. */
+  /** Returns a builder for the default gRPC ChannelProvider for this service. */
   public static InstantiatingGrpcChannelProvider.Builder defaultGrpcTransportProviderBuilder() {
     return SystemPolicyV1Beta1StubSettings.defaultGrpcTransportProviderBuilder();
   }
 
+  /** Returns a builder for the default REST ChannelProvider for this service. */
+  @BetaApi
+  public static InstantiatingHttpJsonChannelProvider.Builder
+      defaultHttpJsonTransportProviderBuilder() {
+    return SystemPolicyV1Beta1StubSettings.defaultHttpJsonTransportProviderBuilder();
+  }
+
   public static TransportChannelProvider defaultTransportChannelProvider() {
     return SystemPolicyV1Beta1StubSettings.defaultTransportChannelProvider();
   }
@@ -115,11 +123,17 @@ public static ApiClientHeaderProvider.Builder defaultApiClientHeaderProviderBuil
     return SystemPolicyV1Beta1StubSettings.defaultApiClientHeaderProviderBuilder();
   }
 
-  /** Returns a new builder for this class. */
+  /** Returns a new gRPC builder for this class. */
   public static Builder newBuilder() {
     return Builder.createDefault();
   }
 
+  /** Returns a new REST builder for this class. */
+  @BetaApi
+  public static Builder newHttpJsonBuilder() {
+    return Builder.createHttpJsonDefault();
+  }
+
   /** Returns a new builder for this class. */
   public static Builder newBuilder(ClientContext clientContext) {
     return new Builder(clientContext);
@@ -157,6 +171,11 @@ private static Builder createDefault() {
       return new Builder(SystemPolicyV1Beta1StubSettings.newBuilder());
     }
 
+    @BetaApi
+    private static Builder createHttpJsonDefault() {
+      return new Builder(SystemPolicyV1Beta1StubSettings.newHttpJsonBuilder());
+    }
+
     public SystemPolicyV1Beta1StubSettings.Builder getStubSettingsBuilder() {
       return ((SystemPolicyV1Beta1StubSettings.Builder) getStubSettings());
     }

google-cloud-binary-authorization/src/main/java/com/google/cloud/binaryauthorization/v1beta1/stub/BinauthzManagementServiceV1Beta1StubSettings.java

@@ -27,6 +27,9 @@
 import com.google.api.gax.grpc.GaxGrpcProperties;
 import com.google.api.gax.grpc.GrpcTransportChannel;
 import com.google.api.gax.grpc.InstantiatingGrpcChannelProvider;
+import com.google.api.gax.httpjson.GaxHttpJsonProperties;
+import com.google.api.gax.httpjson.HttpJsonTransportChannel;
+import com.google.api.gax.httpjson.InstantiatingHttpJsonChannelProvider;
 import com.google.api.gax.retrying.RetrySettings;
 import com.google.api.gax.rpc.ApiCallContext;
 import com.google.api.gax.rpc.ApiClientHeaderProvider;
@@ -210,6 +213,11 @@ public BinauthzManagementServiceV1Beta1Stub createStub() throws IOException {
         .equals(GrpcTransportChannel.getGrpcTransportName())) {
       return GrpcBinauthzManagementServiceV1Beta1Stub.create(this);
     }
+    if (getTransportChannelProvider()
+        .getTransportName()
+        .equals(HttpJsonTransportChannel.getHttpJsonTransportName())) {
+      return HttpJsonBinauthzManagementServiceV1Beta1Stub.create(this);
+    }
     throw new UnsupportedOperationException(
         String.format(
             "Transport not supported: %s", getTransportChannelProvider().getTransportName()));
@@ -242,18 +250,25 @@ public static GoogleCredentialsProvider.Builder defaultCredentialsProviderBuilde
         .setUseJwtAccessWithScope(true);
   }
 
-  /** Returns a builder for the default ChannelProvider for this service. */
+  /** Returns a builder for the default gRPC ChannelProvider for this service. */
   public static InstantiatingGrpcChannelProvider.Builder defaultGrpcTransportProviderBuilder() {
     return InstantiatingGrpcChannelProvider.newBuilder()
         .setMaxInboundMessageSize(Integer.MAX_VALUE);
   }
 
+  /** Returns a builder for the default REST ChannelProvider for this service. */
+  @BetaApi
+  public static InstantiatingHttpJsonChannelProvider.Builder
+      defaultHttpJsonTransportProviderBuilder() {
+    return InstantiatingHttpJsonChannelProvider.newBuilder();
+  }
+
   public static TransportChannelProvider defaultTransportChannelProvider() {
     return defaultGrpcTransportProviderBuilder().build();
   }
 
   @BetaApi("The surface for customizing headers is not stable yet and may change in the future.")
-  public static ApiClientHeaderProvider.Builder defaultApiClientHeaderProviderBuilder() {
+  public static ApiClientHeaderProvider.Builder defaultGrpcApiClientHeaderProviderBuilder() {
     return ApiClientHeaderProvider.newBuilder()
         .setGeneratedLibToken(
             "gapic",
@@ -262,11 +277,31 @@ public static ApiClientHeaderProvider.Builder defaultApiClientHeaderProviderBuil
             GaxGrpcProperties.getGrpcTokenName(), GaxGrpcProperties.getGrpcVersion());
   }
 
-  /** Returns a new builder for this class. */
+  @BetaApi("The surface for customizing headers is not stable yet and may change in the future.")
+  public static ApiClientHeaderProvider.Builder defaultHttpJsonApiClientHeaderProviderBuilder() {
+    return ApiClientHeaderProvider.newBuilder()
+        .setGeneratedLibToken(
+            "gapic",
+            GaxProperties.getLibraryVersion(BinauthzManagementServiceV1Beta1StubSettings.class))
+        .setTransportToken(
+            GaxHttpJsonProperties.getHttpJsonTokenName(),
+            GaxHttpJsonProperties.getHttpJsonVersion());
+  }
+
+  public static ApiClientHeaderProvider.Builder defaultApiClientHeaderProviderBuilder() {
+    return BinauthzManagementServiceV1Beta1StubSettings.defaultGrpcApiClientHeaderProviderBuilder();
+  }
+
+  /** Returns a new gRPC builder for this class. */
   public static Builder newBuilder() {
     return Builder.createDefault();
   }
 
+  /** Returns a new REST builder for this class. */
+  public static Builder newHttpJsonBuilder() {
+    return Builder.createHttpJsonDefault();
+  }
+
   /** Returns a new builder for this class. */
   public static Builder newBuilder(ClientContext clientContext) {
     return new Builder(clientContext);
@@ -408,6 +443,19 @@ private static Builder createDefault() {
       return initDefaults(builder);
     }
 
+    private static Builder createHttpJsonDefault() {
+      Builder builder = new Builder(((ClientContext) null));
+
+      builder.setTransportChannelProvider(defaultHttpJsonTransportProviderBuilder().build());
+      builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
+      builder.setInternalHeaderProvider(defaultHttpJsonApiClientHeaderProviderBuilder().build());
+      builder.setEndpoint(getDefaultEndpoint());
+      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
+      builder.setSwitchToMtlsEndpointAllowed(true);
+
+      return initDefaults(builder);
+    }
+
     private static Builder initDefaults(Builder builder) {
       builder
           .getPolicySettings()