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ServiceStubSettingsClassComposer.java
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ServiceStubSettingsClassComposer.java
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// Copyright 2021 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.api.generator.gapic.composer.grpc;
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.generator.engine.ast.Expr;
import com.google.api.generator.engine.ast.MethodDefinition;
import com.google.api.generator.engine.ast.MethodInvocationExpr;
import com.google.api.generator.engine.ast.ScopeNode;
import com.google.api.generator.engine.ast.TypeNode;
import com.google.api.generator.engine.ast.Variable;
import com.google.api.generator.engine.ast.VariableExpr;
import com.google.api.generator.gapic.composer.common.AbstractServiceStubSettingsClassComposer;
import com.google.api.generator.gapic.composer.store.TypeStore;
import com.google.api.generator.gapic.model.Service;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
public class ServiceStubSettingsClassComposer extends AbstractServiceStubSettingsClassComposer {
private static final ServiceStubSettingsClassComposer INSTANCE =
new ServiceStubSettingsClassComposer();
private static final TypeStore FIXED_GRPC_TYPESTORE = createStaticTypes();
public static ServiceStubSettingsClassComposer instance() {
return INSTANCE;
}
protected ServiceStubSettingsClassComposer() {
super(GrpcContext.instance());
}
private static TypeStore createStaticTypes() {
List<Class<?>> concreteClazzes =
Arrays.asList(
GaxGrpcProperties.class,
GrpcTransportChannel.class,
InstantiatingGrpcChannelProvider.class);
return new TypeStore(concreteClazzes);
}
@Override
protected Expr initializeTransportProviderBuilder(
MethodInvocationExpr transportChannelProviderBuilderExpr, TypeNode returnType) {
return MethodInvocationExpr.builder()
.setExprReferenceExpr(transportChannelProviderBuilderExpr)
.setMethodName("setMaxInboundMessageSize")
.setArguments(
VariableExpr.builder()
.setVariable(Variable.builder().setType(TypeNode.INT).setName("MAX_VALUE").build())
.setStaticReferenceType(TypeNode.INT_OBJECT)
.build())
.setReturnType(returnType)
.build();
}
@Override
protected List<MethodDefinition> createApiClientHeaderProviderBuilderMethods(
Service service, TypeStore typeStore) {
return Collections.singletonList(
createApiClientHeaderProviderBuilderMethod(
service,
typeStore,
"defaultApiClientHeaderProviderBuilder",
FIXED_GRPC_TYPESTORE.get(GaxGrpcProperties.class.getSimpleName()),
"getGrpcTokenName",
"getGrpcVersion"));
}
@Override
public MethodDefinition createDefaultTransportChannelProviderMethod() {
TypeNode returnType = FIXED_TYPESTORE.get("TransportChannelProvider");
MethodInvocationExpr transportProviderBuilderExpr =
MethodInvocationExpr.builder().setMethodName("defaultGrpcTransportProviderBuilder").build();
transportProviderBuilderExpr =
MethodInvocationExpr.builder()
.setExprReferenceExpr(transportProviderBuilderExpr)
.setMethodName("build")
.setReturnType(returnType)
.build();
return MethodDefinition.builder()
.setScope(ScopeNode.PUBLIC)
.setIsStatic(true)
.setReturnType(returnType)
.setName("defaultTransportChannelProvider")
.setReturnExpr(transportProviderBuilderExpr)
.build();
}
}