nl.topicus.jdbc.shaded.io.grpc.netty.NettyServerBuilder Maven / Gradle / Ivy
/*
* Copyright 2014, gRPC Authors All rights reserved.
*
* 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 nl.topicus.jdbc.shaded.io.grpc.netty;
import static nl.topicus.jdbc.shaded.com.google.common.base.Preconditions.checkArgument;
import static nl.topicus.jdbc.shaded.io.grpc.internal.GrpcUtil.DEFAULT_MAX_MESSAGE_SIZE;
import static nl.topicus.jdbc.shaded.io.grpc.internal.GrpcUtil.DEFAULT_SERVER_KEEPALIVE_TIMEOUT_NANOS;
import static nl.topicus.jdbc.shaded.io.grpc.internal.GrpcUtil.DEFAULT_SERVER_KEEPALIVE_TIME_NANOS;
import static nl.topicus.jdbc.shaded.io.grpc.internal.GrpcUtil.SERVER_KEEPALIVE_TIME_NANOS_DISABLED;
import nl.topicus.jdbc.shaded.com.google.common.annotations.VisibleForTesting;
import nl.topicus.jdbc.shaded.com.google.common.base.Preconditions;
import nl.topicus.jdbc.shaded.com.google.errorprone.annotations.CanIgnoreReturnValue;
import nl.topicus.jdbc.shaded.io.grpc.ExperimentalApi;
import nl.topicus.jdbc.shaded.io.grpc.Internal;
import nl.topicus.jdbc.shaded.io.grpc.ServerStreamTracer;
import nl.topicus.jdbc.shaded.io.grpc.internal.AbstractServerImplBuilder;
import nl.topicus.jdbc.shaded.io.grpc.internal.GrpcUtil;
import nl.topicus.jdbc.shaded.io.grpc.internal.KeepAliveManager;
import nl.topicus.jdbc.shaded.io.grpc.internal.TransportTracer;
import nl.topicus.jdbc.shaded.io.netty.channel.ChannelOption;
import nl.topicus.jdbc.shaded.io.netty.channel.EventLoopGroup;
import nl.topicus.jdbc.shaded.io.netty.channel.ServerChannel;
import nl.topicus.jdbc.shaded.io.netty.channel.socket.nio.NioServerSocketChannel;
import nl.topicus.jdbc.shaded.io.netty.handler.ssl.SslContext;
import java.io.File;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import nl.topicus.jdbc.shaded.javax.annotation.CheckReturnValue;
import nl.topicus.jdbc.shaded.javax.annotation.Nullable;
import javax.net.ssl.SSLException;
/**
* A builder to help simplify the construction of a Netty-based GRPC server.
*/
@ExperimentalApi("https://github.com/grpc/grpc-java/issues/1784")
@CanIgnoreReturnValue
public final class NettyServerBuilder extends AbstractServerImplBuilder {
public static final int DEFAULT_FLOW_CONTROL_WINDOW = 1048576; // 1MiB
static final long MAX_CONNECTION_IDLE_NANOS_DISABLED = Long.MAX_VALUE;
static final long MAX_CONNECTION_AGE_NANOS_DISABLED = Long.MAX_VALUE;
static final long MAX_CONNECTION_AGE_GRACE_NANOS_INFINITE = Long.MAX_VALUE;
private static final long MIN_KEEPALIVE_TIME_NANO = TimeUnit.MILLISECONDS.toNanos(1L);
private static final long MIN_KEEPALIVE_TIMEOUT_NANO = TimeUnit.MICROSECONDS.toNanos(499L);
private static final long MIN_MAX_CONNECTION_IDLE_NANO = TimeUnit.SECONDS.toNanos(1L);
private static final long MIN_MAX_CONNECTION_AGE_NANO = TimeUnit.SECONDS.toNanos(1L);
private static final long AS_LARGE_AS_INFINITE = TimeUnit.DAYS.toNanos(1000L);
private final SocketAddress address;
private Class channelType = NioServerSocketChannel.class;
private final Map, Object> channelOptions =
new HashMap, Object>();
@Nullable
private EventLoopGroup bossEventLoopGroup;
@Nullable
private EventLoopGroup workerEventLoopGroup;
private SslContext sslContext;
private ProtocolNegotiator protocolNegotiator;
private int maxConcurrentCallsPerConnection = Integer.MAX_VALUE;
private int flowControlWindow = DEFAULT_FLOW_CONTROL_WINDOW;
private int maxMessageSize = DEFAULT_MAX_MESSAGE_SIZE;
private int maxHeaderListSize = GrpcUtil.DEFAULT_MAX_HEADER_LIST_SIZE;
private long keepAliveTimeInNanos = DEFAULT_SERVER_KEEPALIVE_TIME_NANOS;
private long keepAliveTimeoutInNanos = DEFAULT_SERVER_KEEPALIVE_TIMEOUT_NANOS;
private long maxConnectionIdleInNanos = MAX_CONNECTION_IDLE_NANOS_DISABLED;
private long maxConnectionAgeInNanos = MAX_CONNECTION_AGE_NANOS_DISABLED;
private long maxConnectionAgeGraceInNanos = MAX_CONNECTION_AGE_GRACE_NANOS_INFINITE;
private boolean permitKeepAliveWithoutCalls;
private long permitKeepAliveTimeInNanos = TimeUnit.MINUTES.toNanos(5);
/**
* Creates a server builder that will bind to the given port.
*
* @param port the port on which the server is to be bound.
* @return the server builder.
*/
@CheckReturnValue
public static NettyServerBuilder forPort(int port) {
return new NettyServerBuilder(port);
}
/**
* Creates a server builder configured with the given {@link SocketAddress}.
*
* @param address the socket address on which the server is to be bound.
* @return the server builder
*/
@CheckReturnValue
public static NettyServerBuilder forAddress(SocketAddress address) {
return new NettyServerBuilder(address);
}
@CheckReturnValue
private NettyServerBuilder(int port) {
this.address = new InetSocketAddress(port);
}
@CheckReturnValue
private NettyServerBuilder(SocketAddress address) {
this.address = address;
}
/**
* Specify the channel type to use, by default we use {@link NioServerSocketChannel}.
*/
public NettyServerBuilder channelType(Class channelType) {
this.channelType = Preconditions.checkNotNull(channelType, "channelType");
return this;
}
/**
* Specifies a channel option. As the underlying channel as well as network implementation may
* ignore this value applications should consider it a hint.
*
* @since 1.9.0
*/
public NettyServerBuilder withChildOption(ChannelOption option, T value) {
this.channelOptions.put(option, value);
return this;
}
/**
* Provides the boss EventGroupLoop to the server.
*
* It's an optional parameter. If the user has not provided one when the server is built, the
* builder will use the default one which is static.
*
*
The server won't take ownership of the given EventLoopGroup. It's caller's responsibility
* to shut it down when it's desired.
*
*
Grpc uses non-daemon {@link Thread}s by default and thus a {@link nl.topicus.jdbc.shaded.io.grpc.Server} will
* continue to run even after the main thread has terminated. However, users have to be cautious
* when providing their own {@link EventLoopGroup}s.
* For example, Netty's {@link EventLoopGroup}s use daemon threads by default
* and thus an application with only daemon threads running besides the main thread will exit as
* soon as the main thread completes.
* A simple solution to this problem is to call {@link nl.topicus.jdbc.shaded.io.grpc.Server#awaitTermination()} to
* keep the main thread alive until the server has terminated.
*/
public NettyServerBuilder bossEventLoopGroup(EventLoopGroup group) {
this.bossEventLoopGroup = group;
return this;
}
/**
* Provides the worker EventGroupLoop to the server.
*
*
It's an optional parameter. If the user has not provided one when the server is built, the
* builder will create one.
*
*
The server won't take ownership of the given EventLoopGroup. It's caller's responsibility
* to shut it down when it's desired.
*
*
Grpc uses non-daemon {@link Thread}s by default and thus a {@link nl.topicus.jdbc.shaded.io.grpc.Server} will
* continue to run even after the main thread has terminated. However, users have to be cautious
* when providing their own {@link EventLoopGroup}s.
* For example, Netty's {@link EventLoopGroup}s use daemon threads by default
* and thus an application with only daemon threads running besides the main thread will exit as
* soon as the main thread completes.
* A simple solution to this problem is to call {@link nl.topicus.jdbc.shaded.io.grpc.Server#awaitTermination()} to
* keep the main thread alive until the server has terminated.
*/
public NettyServerBuilder workerEventLoopGroup(EventLoopGroup group) {
this.workerEventLoopGroup = group;
return this;
}
/**
* Sets the TLS context to use for encryption. Providing a context enables encryption. It must
* have been configured with {@link GrpcSslContexts}, but options could have been overridden.
*/
public NettyServerBuilder sslContext(SslContext sslContext) {
if (sslContext != null) {
checkArgument(sslContext.isServer(),
"Client SSL context can not be used for server");
GrpcSslContexts.ensureAlpnAndH2Enabled(sslContext.applicationProtocolNegotiator());
}
this.sslContext = sslContext;
return this;
}
/**
* Sets the {@link ProtocolNegotiator} to be used. If non-{@code null}, overrides the value
* specified in {@link #sslContext(SslContext)}.
*
*
Default: {@code null}.
*/
@Internal
public final NettyServerBuilder protocolNegotiator(
@Nullable ProtocolNegotiator protocolNegotiator) {
this.protocolNegotiator = protocolNegotiator;
return this;
}
@Override
protected void setTracingEnabled(boolean value) {
super.setTracingEnabled(value);
}
@Override
protected void setStatsEnabled(boolean value) {
super.setStatsEnabled(value);
}
@Override
protected void setStatsRecordStartedRpcs(boolean value) {
super.setStatsRecordStartedRpcs(value);
}
@VisibleForTesting
NettyServerBuilder setTransportTracerFactory(TransportTracer.Factory transportTracerFactory) {
this.transportTracerFactory = transportTracerFactory;
return this;
}
/**
* The maximum number of concurrent calls permitted for each incoming connection. Defaults to no
* limit.
*/
public NettyServerBuilder maxConcurrentCallsPerConnection(int maxCalls) {
checkArgument(maxCalls > 0, "max must be positive: %s", maxCalls);
this.maxConcurrentCallsPerConnection = maxCalls;
return this;
}
/**
* Sets the HTTP/2 flow control window. If not called, the default value
* is {@link #DEFAULT_FLOW_CONTROL_WINDOW}).
*/
public NettyServerBuilder flowControlWindow(int flowControlWindow) {
checkArgument(flowControlWindow > 0, "flowControlWindow must be positive");
this.flowControlWindow = flowControlWindow;
return this;
}
/**
* Sets the maximum message size allowed to be received on the server. If not called,
* defaults to 4 MiB. The default provides protection to services who haven't considered the
* possibility of receiving large messages while trying to be large enough to not be hit in normal
* usage.
*/
public NettyServerBuilder maxMessageSize(int maxMessageSize) {
checkArgument(maxMessageSize >= 0, "maxMessageSize must be >= 0");
this.maxMessageSize = maxMessageSize;
return this;
}
/**
* Sets the maximum size of header list allowed to be received. This is cumulative size of the
* headers with some overhead, as defined for
*
* HTTP/2's SETTINGS_MAX_HEADER_LIST_SIZE. The default is 8 KiB.
*/
public NettyServerBuilder maxHeaderListSize(int maxHeaderListSize) {
checkArgument(maxHeaderListSize > 0, "maxHeaderListSize must be > 0");
this.maxHeaderListSize = maxHeaderListSize;
return this;
}
/**
* Sets a custom keepalive time, the delay time for sending next keepalive ping. An unreasonably
* small value might be increased, and {@code Long.MAX_VALUE} nano seconds or an unreasonably
* large value will disable keepalive.
*
* @since 1.3.0
*/
public NettyServerBuilder keepAliveTime(long keepAliveTime, TimeUnit timeUnit) {
checkArgument(keepAliveTime > 0L, "keepalive time must be positive");
keepAliveTimeInNanos = timeUnit.toNanos(keepAliveTime);
keepAliveTimeInNanos = KeepAliveManager.clampKeepAliveTimeInNanos(keepAliveTimeInNanos);
if (keepAliveTimeInNanos >= AS_LARGE_AS_INFINITE) {
// Bump keepalive time to infinite. This disables keep alive.
keepAliveTimeInNanos = SERVER_KEEPALIVE_TIME_NANOS_DISABLED;
}
if (keepAliveTimeInNanos < MIN_KEEPALIVE_TIME_NANO) {
// Bump keepalive time.
keepAliveTimeInNanos = MIN_KEEPALIVE_TIME_NANO;
}
return this;
}
/**
* Sets a custom keepalive timeout, the timeout for keepalive ping requests. An unreasonably small
* value might be increased.
*
* @since 1.3.0
*/
public NettyServerBuilder keepAliveTimeout(long keepAliveTimeout, TimeUnit timeUnit) {
checkArgument(keepAliveTimeout > 0L, "keepalive timeout must be positive");
keepAliveTimeoutInNanos = timeUnit.toNanos(keepAliveTimeout);
keepAliveTimeoutInNanos =
KeepAliveManager.clampKeepAliveTimeoutInNanos(keepAliveTimeoutInNanos);
if (keepAliveTimeoutInNanos < MIN_KEEPALIVE_TIMEOUT_NANO) {
// Bump keepalive timeout.
keepAliveTimeoutInNanos = MIN_KEEPALIVE_TIMEOUT_NANO;
}
return this;
}
/**
* Sets a custom max connection idle time, connection being idle for longer than which will be
* gracefully terminated. Idleness duration is defined since the most recent time the number of
* outstanding RPCs became zero or the connection establishment. An unreasonably small value might
* be increased. {@code Long.MAX_VALUE} nano seconds or an unreasonably large value will disable
* max connection idle.
*
* @since 1.4.0
*/
public NettyServerBuilder maxConnectionIdle(long maxConnectionIdle, TimeUnit timeUnit) {
checkArgument(maxConnectionIdle > 0L, "max connection idle must be positive");
maxConnectionIdleInNanos = timeUnit.toNanos(maxConnectionIdle);
if (maxConnectionIdleInNanos >= AS_LARGE_AS_INFINITE) {
maxConnectionIdleInNanos = MAX_CONNECTION_IDLE_NANOS_DISABLED;
}
if (maxConnectionIdleInNanos < MIN_MAX_CONNECTION_IDLE_NANO) {
maxConnectionIdleInNanos = MIN_MAX_CONNECTION_IDLE_NANO;
}
return this;
}
/**
* Sets a custom max connection age, connection lasting longer than which will be gracefully
* terminated. An unreasonably small value might be increased. A random jitter of +/-10% will be
* added to it. {@code Long.MAX_VALUE} nano seconds or an unreasonably large value will disable
* max connection age.
*
* @since 1.3.0
*/
public NettyServerBuilder maxConnectionAge(long maxConnectionAge, TimeUnit timeUnit) {
checkArgument(maxConnectionAge > 0L, "max connection age must be positive");
maxConnectionAgeInNanos = timeUnit.toNanos(maxConnectionAge);
if (maxConnectionAgeInNanos >= AS_LARGE_AS_INFINITE) {
maxConnectionAgeInNanos = MAX_CONNECTION_AGE_NANOS_DISABLED;
}
if (maxConnectionAgeInNanos < MIN_MAX_CONNECTION_AGE_NANO) {
maxConnectionAgeInNanos = MIN_MAX_CONNECTION_AGE_NANO;
}
return this;
}
/**
* Sets a custom grace time for the graceful connection termination. Once the max connection age
* is reached, RPCs have the grace time to complete. RPCs that do not complete in time will be
* cancelled, allowing the connection to terminate. {@code Long.MAX_VALUE} nano seconds or an
* unreasonably large value are considered infinite.
*
* @see #maxConnectionAge(long, TimeUnit)
* @since 1.3.0
*/
public NettyServerBuilder maxConnectionAgeGrace(long maxConnectionAgeGrace, TimeUnit timeUnit) {
checkArgument(maxConnectionAgeGrace >= 0L, "max connection age grace must be non-negative");
maxConnectionAgeGraceInNanos = timeUnit.toNanos(maxConnectionAgeGrace);
if (maxConnectionAgeGraceInNanos >= AS_LARGE_AS_INFINITE) {
maxConnectionAgeGraceInNanos = MAX_CONNECTION_AGE_GRACE_NANOS_INFINITE;
}
return this;
}
/**
* Specify the most aggressive keep-alive time clients are permitted to configure. The server will
* try to detect clients exceeding this rate and when detected will forcefully close the
* connection. The default is 5 minutes.
*
*
Even though a default is defined that allows some keep-alives, clients must not use
* keep-alive without approval from the service owner. Otherwise, they may experience failures in
* the future if the service becomes more restrictive. When unthrottled, keep-alives can cause a
* significant amount of traffic and CPU usage, so clients and servers should be conservative in
* what they use and accept.
*
* @see #permitKeepAliveWithoutCalls(boolean)
* @since 1.3.0
*/
public NettyServerBuilder permitKeepAliveTime(long keepAliveTime, TimeUnit timeUnit) {
checkArgument(keepAliveTime >= 0, "permit keepalive time must be non-negative");
permitKeepAliveTimeInNanos = timeUnit.toNanos(keepAliveTime);
return this;
}
/**
* Sets whether to allow clients to send keep-alive HTTP/2 PINGs even if there are no outstanding
* RPCs on the connection. Defaults to {@code false}.
*
* @see #permitKeepAliveTime(long, TimeUnit)
* @since 1.3.0
*/
public NettyServerBuilder permitKeepAliveWithoutCalls(boolean permit) {
permitKeepAliveWithoutCalls = permit;
return this;
}
@Override
@CheckReturnValue
protected NettyServer buildTransportServer(
List streamTracerFactories) {
ProtocolNegotiator negotiator = protocolNegotiator;
if (negotiator == null) {
negotiator = sslContext != null ? ProtocolNegotiators.serverTls(sslContext) :
ProtocolNegotiators.serverPlaintext();
}
return new NettyServer(
address, channelType, channelOptions, bossEventLoopGroup, workerEventLoopGroup,
negotiator, streamTracerFactories, transportTracerFactory,
maxConcurrentCallsPerConnection, flowControlWindow,
maxMessageSize, maxHeaderListSize, keepAliveTimeInNanos, keepAliveTimeoutInNanos,
maxConnectionIdleInNanos,
maxConnectionAgeInNanos, maxConnectionAgeGraceInNanos,
permitKeepAliveWithoutCalls, permitKeepAliveTimeInNanos);
}
@Override
public NettyServerBuilder useTransportSecurity(File certChain, File privateKey) {
try {
sslContext = GrpcSslContexts.forServer(certChain, privateKey).build();
} catch (SSLException e) {
// This should likely be some other, easier to catch exception.
throw new RuntimeException(e);
}
return this;
}
}