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/*
* Copyright 2015 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;
import static com.google.common.base.Preconditions.checkNotNull;
import com.google.common.base.Preconditions;
import java.io.File;
import java.io.InputStream;
import java.util.List;
import java.util.concurrent.Executor;
import java.util.concurrent.TimeUnit;
import javax.annotation.Nullable;
/**
* A builder for {@link Server} instances.
*
* @param The concrete type of this builder.
* @since 1.0.0
*/
public abstract class ServerBuilder> {
/**
* Static factory for creating a new ServerBuilder.
*
* @param port the port to listen on
* @since 1.0.0
*/
public static ServerBuilder forPort(int port) {
return ServerProvider.provider().builderForPort(port);
}
/**
* Execute application code directly in the transport thread.
*
* Depending on the underlying transport, using a direct executor may lead to substantial
* performance improvements. However, it also requires the application to not block under
* any circumstances.
*
*
Calling this method is semantically equivalent to calling {@link #executor(Executor)} and
* passing in a direct executor. However, this is the preferred way as it may allow the transport
* to perform special optimizations.
*
* @return this
* @since 1.0.0
*/
public abstract T directExecutor();
/**
* Provides a custom executor.
*
*
It's an optional parameter. If the user has not provided an executor when the server is
* built, the builder will use a static cached thread pool.
*
*
The server won't take ownership of the given executor. It's caller's responsibility to
* shut down the executor when it's desired.
*
* @return this
* @since 1.0.0
*/
public abstract T executor(@Nullable Executor executor);
/**
* Allows for defining a way to provide a custom executor to handle the server call.
* This executor is the result of calling
* {@link ServerCallExecutorSupplier#getExecutor(ServerCall, Metadata)} per RPC.
*
*
It's an optional parameter. If it is provided, the {@link #executor(Executor)} would still
* run necessary tasks before the {@link ServerCallExecutorSupplier} is ready to be called, then
* it switches over. But if calling {@link ServerCallExecutorSupplier} returns null, the server
* call is still handled by the default {@link #executor(Executor)} as a fallback.
*
* @param executorSupplier the server call executor provider
* @return this
* @since 1.39.0
*
* */
@ExperimentalApi("https://github.com/grpc/grpc-java/issues/8274")
public T callExecutor(ServerCallExecutorSupplier executorSupplier) {
return thisT();
}
/**
* Adds a service implementation to the handler registry.
*
* @param service ServerServiceDefinition object
* @return this
* @since 1.0.0
*/
public abstract T addService(ServerServiceDefinition service);
/**
* Adds a service implementation to the handler registry.
*
* @param bindableService BindableService object
* @return this
* @since 1.0.0
*/
public abstract T addService(BindableService bindableService);
/**
* Adds a list of service implementations to the handler registry together.
*
* @param services the list of ServerServiceDefinition objects
* @return this
* @since 1.37.0
*/
@ExperimentalApi("https://github.com/grpc/grpc-java/issues/7925")
public final T addServices(List services) {
checkNotNull(services, "services");
for (ServerServiceDefinition service : services) {
addService(service);
}
return thisT();
}
/**
* Adds a {@link ServerInterceptor} that is run for all services on the server. Interceptors
* added through this method always run before per-service interceptors added through {@link
* ServerInterceptors}. Interceptors run in the reverse order in which they are added, just as
* with consecutive calls to {@code ServerInterceptors.intercept()}.
*
* @param interceptor the all-service interceptor
* @return this
* @since 1.5.0
*/
@ExperimentalApi("https://github.com/grpc/grpc-java/issues/3117")
public T intercept(ServerInterceptor interceptor) {
throw new UnsupportedOperationException();
}
/**
* Adds a {@link ServerTransportFilter}. The order of filters being added is the order they will
* be executed.
*
* @return this
* @since 1.2.0
*/
@ExperimentalApi("https://github.com/grpc/grpc-java/issues/2132")
public T addTransportFilter(ServerTransportFilter filter) {
throw new UnsupportedOperationException();
}
/**
* Adds a {@link ServerStreamTracer.Factory} to measure server-side traffic. The order of
* factories being added is the order they will be executed.
*
* @return this
* @since 1.3.0
*/
@ExperimentalApi("https://github.com/grpc/grpc-java/issues/2861")
public T addStreamTracerFactory(ServerStreamTracer.Factory factory) {
throw new UnsupportedOperationException();
}
/**
* Sets a fallback handler registry that will be looked up in if a method is not found in the
* primary registry. The primary registry (configured via {@code addService()}) is faster but
* immutable. The fallback registry is more flexible and allows implementations to mutate over
* time and load services on-demand.
*
* @return this
* @since 1.0.0
*/
public abstract T fallbackHandlerRegistry(@Nullable HandlerRegistry fallbackRegistry);
/**
* Makes the server use TLS.
*
* @param certChain file containing the full certificate chain
* @param privateKey file containing the private key
*
* @return this
* @throws UnsupportedOperationException if the server does not support TLS.
* @since 1.0.0
*/
public abstract T useTransportSecurity(File certChain, File privateKey);
/**
* Makes the server use TLS.
*
* @param certChain InputStream containing the full certificate chain
* @param privateKey InputStream containing the private key
*
* @return this
* @throws UnsupportedOperationException if the server does not support TLS, or does not support
* reading these files from an InputStream.
* @since 1.12.0
*/
public T useTransportSecurity(InputStream certChain, InputStream privateKey) {
throw new UnsupportedOperationException();
}
/**
* Set the decompression registry for use in the channel. This is an advanced API call and
* shouldn't be used unless you are using custom message encoding. The default supported
* decompressors are in {@code DecompressorRegistry.getDefaultInstance}.
*
* @return this
* @since 1.0.0
*/
@ExperimentalApi("https://github.com/grpc/grpc-java/issues/1704")
public abstract T decompressorRegistry(@Nullable DecompressorRegistry registry);
/**
* Set the compression registry for use in the channel. This is an advanced API call and
* shouldn't be used unless you are using custom message encoding. The default supported
* compressors are in {@code CompressorRegistry.getDefaultInstance}.
*
* @return this
* @since 1.0.0
*/
@ExperimentalApi("https://github.com/grpc/grpc-java/issues/1704")
public abstract T compressorRegistry(@Nullable CompressorRegistry registry);
/**
* Sets the permitted time for new connections to complete negotiation handshakes before being
* killed.
*
* @return this
* @throws IllegalArgumentException if timeout is negative
* @throws UnsupportedOperationException if unsupported
* @since 1.8.0
*/
@ExperimentalApi("https://github.com/grpc/grpc-java/issues/3706")
public T handshakeTimeout(long timeout, TimeUnit unit) {
throw new UnsupportedOperationException();
}
/**
* Sets the maximum message size allowed to be received on the server. If not called,
* defaults to 4 MiB. The default provides protection to servers who haven't considered the
* possibility of receiving large messages while trying to be large enough to not be hit in normal
* usage.
*
* This method is advisory, and implementations may decide to not enforce this. Currently,
* the only known transport to not enforce this is {@code InProcessServer}.
*
* @param bytes the maximum number of bytes a single message can be.
* @return this
* @throws IllegalArgumentException if bytes is negative.
* @throws UnsupportedOperationException if unsupported.
* @since 1.13.0
*/
public T maxInboundMessageSize(int bytes) {
// intentional noop rather than throw, this method is only advisory.
Preconditions.checkArgument(bytes >= 0, "bytes must be >= 0");
return thisT();
}
/**
* Sets the maximum size of metadata allowed to be received. {@code Integer.MAX_VALUE} disables
* the enforcement. The default is implementation-dependent, but is not generally less than 8 KiB
* and may be unlimited.
*
*
This is cumulative size of the metadata. The precise calculation is
* implementation-dependent, but implementations are encouraged to follow the calculation used for
*
* HTTP/2's SETTINGS_MAX_HEADER_LIST_SIZE. It sums the bytes from each entry's key and value,
* plus 32 bytes of overhead per entry.
*
* @param bytes the maximum size of received metadata
* @return this
* @throws IllegalArgumentException if bytes is non-positive
* @since 1.17.0
*/
public T maxInboundMetadataSize(int bytes) {
Preconditions.checkArgument(bytes > 0, "maxInboundMetadataSize must be > 0");
// intentional noop rather than throw, this method is only advisory.
return thisT();
}
/**
* Sets the BinaryLog object that this server should log to. The server does not take
* ownership of the object, and users are responsible for calling {@link BinaryLog#close()}.
*
* @param binaryLog the object to provide logging.
* @return this
* @since 1.13.0
*/
@ExperimentalApi("https://github.com/grpc/grpc-java/issues/4017")
public T setBinaryLog(BinaryLog binaryLog) {
throw new UnsupportedOperationException();
}
/**
* Builds a server using the given parameters.
*
*
The returned service will not been started or be bound a port. You will need to start it
* with {@link Server#start()}.
*
* @return a new Server
* @since 1.0.0
*/
public abstract Server build();
/**
* Returns the correctly typed version of the builder.
*/
private T thisT() {
@SuppressWarnings("unchecked")
T thisT = (T) this;
return thisT;
}
}