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xds: Copy ForwardingServerBuilder to xds for XdsServerBuilder
This reduces ABI issues caused by returning the more precise XdsServerBuilder in the API. See #7552. ForwardingServerBuilder isn't yet public, so just copy it; it'll be easy to clean up. Since ForwardingServerBuilder is package-private, the JavaDoc isn't particularly pretty. But I think that's the best we can do at the moment.
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xds/src/main/java/io/grpc/xds/ForwardingServerBuilder.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,177 @@ | ||
| /* | ||
| * Copyright 2020 The gRPC Authors | ||
| * | ||
| * 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 io.grpc.xds; | ||
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| import com.google.common.base.MoreObjects; | ||
| import io.grpc.BinaryLog; | ||
| import io.grpc.BindableService; | ||
| import io.grpc.CompressorRegistry; | ||
| import io.grpc.DecompressorRegistry; | ||
| import io.grpc.HandlerRegistry; | ||
| import io.grpc.Server; | ||
| import io.grpc.ServerBuilder; | ||
| import io.grpc.ServerInterceptor; | ||
| import io.grpc.ServerServiceDefinition; | ||
| import io.grpc.ServerStreamTracer; | ||
| import io.grpc.ServerTransportFilter; | ||
| import java.io.File; | ||
| import java.io.InputStream; | ||
| import java.util.concurrent.Executor; | ||
| import java.util.concurrent.TimeUnit; | ||
| import javax.annotation.Nullable; | ||
|
|
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| /** | ||
| * A {@link ServerBuilder} that delegates all its builder method to another builder by default. | ||
| * | ||
| * @param <T> The type of the subclass extending this abstract class. | ||
| */ | ||
| abstract class ForwardingServerBuilder<T extends ServerBuilder<T>> extends ServerBuilder<T> { | ||
|
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| /** The default constructor. */ | ||
| protected ForwardingServerBuilder() {} | ||
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| /** | ||
| * This method serves to force sub classes to "hide" this static factory. | ||
| */ | ||
| public static ServerBuilder<?> forPort(int port) { | ||
| throw new UnsupportedOperationException("Subclass failed to hide static factory"); | ||
| } | ||
|
|
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| /** | ||
| * Returns the delegated {@code ServerBuilder}. | ||
| */ | ||
| protected abstract ServerBuilder<?> delegate(); | ||
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| @Override | ||
| public T directExecutor() { | ||
| delegate().directExecutor(); | ||
| return thisT(); | ||
| } | ||
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| @Override | ||
| public T executor(@Nullable Executor executor) { | ||
| delegate().executor(executor); | ||
| return thisT(); | ||
| } | ||
|
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| @Override | ||
| public T addService(ServerServiceDefinition service) { | ||
| delegate().addService(service); | ||
| return thisT(); | ||
| } | ||
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| @Override | ||
| public T addService(BindableService bindableService) { | ||
| delegate().addService(bindableService); | ||
| return thisT(); | ||
| } | ||
|
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| @Override | ||
| public T intercept(ServerInterceptor interceptor) { | ||
| delegate().intercept(interceptor); | ||
| return thisT(); | ||
| } | ||
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| @Override | ||
| public T addTransportFilter(ServerTransportFilter filter) { | ||
| delegate().addTransportFilter(filter); | ||
| return thisT(); | ||
| } | ||
|
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| @Override | ||
| public T addStreamTracerFactory(ServerStreamTracer.Factory factory) { | ||
| delegate().addStreamTracerFactory(factory); | ||
| return thisT(); | ||
| } | ||
|
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| @Override | ||
| public T fallbackHandlerRegistry(@Nullable HandlerRegistry fallbackRegistry) { | ||
| delegate().fallbackHandlerRegistry(fallbackRegistry); | ||
| return thisT(); | ||
| } | ||
|
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| @Override | ||
| public T useTransportSecurity(File certChain, File privateKey) { | ||
| delegate().useTransportSecurity(certChain, privateKey); | ||
| return thisT(); | ||
| } | ||
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| @Override | ||
| public T useTransportSecurity(InputStream certChain, InputStream privateKey) { | ||
| delegate().useTransportSecurity(certChain, privateKey); | ||
| return thisT(); | ||
| } | ||
|
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| @Override | ||
| public T decompressorRegistry(@Nullable DecompressorRegistry registry) { | ||
| delegate().decompressorRegistry(registry); | ||
| return thisT(); | ||
| } | ||
|
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| @Override | ||
| public T compressorRegistry(@Nullable CompressorRegistry registry) { | ||
| delegate().compressorRegistry(registry); | ||
| return thisT(); | ||
| } | ||
|
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| @Override | ||
| public T handshakeTimeout(long timeout, TimeUnit unit) { | ||
| delegate().handshakeTimeout(timeout, unit); | ||
| return thisT(); | ||
| } | ||
|
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| @Override | ||
| public T maxInboundMessageSize(int bytes) { | ||
| delegate().maxInboundMessageSize(bytes); | ||
| return thisT(); | ||
| } | ||
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| @Override | ||
| public T maxInboundMetadataSize(int bytes) { | ||
| delegate().maxInboundMetadataSize(bytes); | ||
| return thisT(); | ||
| } | ||
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| @Override | ||
| public T setBinaryLog(BinaryLog binaryLog) { | ||
| delegate().setBinaryLog(binaryLog); | ||
| return thisT(); | ||
| } | ||
|
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| /** | ||
| * Returns the {@link Server} built by the delegate by default. Overriding method can return | ||
| * different value. | ||
| */ | ||
| @Override | ||
| public Server build() { | ||
| return delegate().build(); | ||
| } | ||
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| @Override | ||
| public String toString() { | ||
| return MoreObjects.toStringHelper(this).add("delegate", delegate()).toString(); | ||
| } | ||
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| /** | ||
| * Returns the correctly typed version of the builder. | ||
| */ | ||
| protected final T thisT() { | ||
| @SuppressWarnings("unchecked") | ||
| T thisT = (T) this; | ||
| return thisT; | ||
| } | ||
| } |
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