reactor.netty.transport

Class ServerTransport<T extends ServerTransport<T,CONF>,CONF extends ServerTransportConfig<CONF>>

java.lang.Object

reactor.netty.transport.Transport<T,CONF>

reactor.netty.transport.ServerTransport<T,CONF>

Type Parameters:

T - ServerTransport implementation

CONF - Server Configuration implementation

Direct Known Subclasses:

HttpServer, TcpServer

public abstract class ServerTransport<T extends ServerTransport<T,CONF>,CONF extends ServerTransportConfig<CONF>>
extends Transport<T,CONF>

A generic server Transport that will bind() to a local address and provide a DisposableServer

Since:

1.0.0

Author:

Stephane Maldini, Violeta Georgieva

Constructor Summary

Constructors

Constructor and Description
ServerTransport()

Method Summary

Modifier and Type	Method and Description
Mono<? extends DisposableServer>	bind() Binds the ServerTransport and returns a Mono of DisposableServer.
DisposableServer	bindNow() Starts the server in a blocking fashion, and waits for it to finish initializing or the startup timeout expires (the startup timeout is 45 seconds).
DisposableServer	bindNow(Duration timeout) Start the server in a blocking fashion, and wait for it to finish initializing or the provided startup timeout expires.
void	bindUntilJavaShutdown(Duration timeout, Consumer<DisposableServer> onStart) Start the server in a fully blocking fashion, not only waiting for it to initialize but also blocking during the full lifecycle of the server.
<A> T	childAttr(AttributeKey<A> key, A value) Injects default attribute to the future child Channel connections.
T	childObserve(ConnectionObserver observer) Set or add the given ConnectionObserver for each remote connection
<A> T	childOption(ChannelOption<A> key, A value) Injects default options to the future child Channel connections.
T	doOnBind(Consumer<? super CONF> doOnBind) Set or add a callback called when ServerTransport is about to start listening for incoming traffic.
T	doOnBound(Consumer<? super DisposableServer> doOnBound) Set or add a callback called after DisposableServer has been started.
T	doOnConnection(Consumer<? super Connection> doOnConnection) Set or add a callback called on new remote Connection.
T	doOnUnbound(Consumer<? super DisposableServer> doOnUnbound) Set or add a callback called after DisposableServer has been shutdown.
T	host(String host) The host to which this server should bind.
T	port(int port) The port to which this server should bind.
Mono<Void>	warmup() Based on the actual configuration, returns a Mono that triggers: an initialization of the event loop groups loads the necessary native libraries for the transport By default, when method is not used, the bind operation absorbs the extra time needed to load resources.

Methods inherited from class reactor.netty.transport.Transport

attr, bindAddress, channelGroup, configuration, doOnChannelInit, duplicate, metrics, metrics, observe, option, runOn, runOn, runOn, wiretap, wiretap, wiretap, wiretap, wiretap

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ServerTransport

public ServerTransport()

Method Detail

bind

public Mono<? extends DisposableServer> bind()

Binds the ServerTransport and returns a Mono of DisposableServer. If Mono is cancelled, the underlying binding will be aborted. Once the DisposableServer has been emitted and is not necessary anymore, disposing the main server loop must be done by the user via DisposableChannel.dispose().

Returns:

a Mono of DisposableServer

bindNow

public final DisposableServer bindNow()

Starts the server in a blocking fashion, and waits for it to finish initializing or the startup timeout expires (the startup timeout is 45 seconds). The returned DisposableServer offers simple server API, including to DisposableChannel.disposeNow() shut it down in a blocking fashion.

Returns:

a Mono of Connection

bindNow

public final DisposableServer bindNow(Duration timeout)

Start the server in a blocking fashion, and wait for it to finish initializing or the provided startup timeout expires. The returned DisposableServer offers simple server API, including to DisposableChannel.disposeNow() shut it down in a blocking fashion.

Parameters:

timeout - max startup timeout (resolution: ns)

Returns:

a DisposableServer

bindUntilJavaShutdown

public final void bindUntilJavaShutdown(Duration timeout,
                                        @Nullable
                                        Consumer<DisposableServer> onStart)

Start the server in a fully blocking fashion, not only waiting for it to initialize but also blocking during the full lifecycle of the server. Since most servers will be long-lived, this is more adapted to running a server out of a main method, only allowing shutdown of the servers through sigkill.

Note: JVM shutdown hook is added by this method in order to properly disconnect the server upon receiving a sigkill signal.

Parameters:

timeout - a timeout for server shutdown

onStart - an optional callback on server start

childAttr

public <A> T childAttr(AttributeKey<A> key,
                       @Nullable
                       A value)

Injects default attribute to the future child Channel connections. It will be available via AttributeMap.attr(AttributeKey). If the value is null, the attribute of the specified key is removed.

Type Parameters:

A - the attribute type

Parameters:

key - the attribute key

value - the attribute value - null to remove a key

Returns:

a new ServerTransport reference

See Also:

ServerBootstrap.childAttr(AttributeKey, Object)

childObserve

public T childObserve(ConnectionObserver observer)

Set or add the given ConnectionObserver for each remote connection

Parameters:

observer - the ConnectionObserver addition

Returns:

a new ServerTransport reference

childOption

public <A> T childOption(ChannelOption<A> key,
                         @Nullable
                         A value)

Injects default options to the future child Channel connections. It will be available via Channel.config(). If the value is null, the attribute of the specified key is removed. Note: Setting ChannelOption.AUTO_READ option will be ignored. It is configured to be false.

Type Parameters:

A - the option type

Parameters:

key - the option key

value - the option value - null to remove a key

Returns:

a new ServerTransport reference

See Also:

ServerBootstrap.childOption(ChannelOption, Object)

doOnBind

public T doOnBind(Consumer<? super CONF> doOnBind)

Set or add a callback called when ServerTransport is about to start listening for incoming traffic.

Parameters:

doOnBind - a consumer observing connected events

Returns:

a new ServerTransport reference

doOnBound

public T doOnBound(Consumer<? super DisposableServer> doOnBound)

Set or add a callback called after DisposableServer has been started.

Parameters:

doOnBound - a consumer observing connected events

Returns:

a new ServerTransport reference

doOnConnection

public T doOnConnection(Consumer<? super Connection> doOnConnection)

Set or add a callback called on new remote Connection.

Parameters:

doOnConnection - a consumer observing remote connections

Returns:

a new ServerTransport reference

doOnUnbound

public T doOnUnbound(Consumer<? super DisposableServer> doOnUnbound)

Set or add a callback called after DisposableServer has been shutdown.

Parameters:

doOnUnbound - a consumer observing unbound events

Returns:

a new ServerTransport reference

host

public T host(String host)

The host to which this server should bind.

Parameters:

host - the host to bind to.

Returns:

a new ServerTransport reference

port

public T port(int port)

The port to which this server should bind.

Parameters:

port - The port to bind to.

Returns:

a new ServerTransport reference

warmup

public Mono<Void> warmup()

Based on the actual configuration, returns a Mono that triggers:

• an initialization of the event loop groups
• loads the necessary native libraries for the transport

By default, when method is not used, the bind operation absorbs the extra time needed to load resources.

Returns:

a Mono representing the completion of the warmup

Since:

1.0.3