Package net.fabricmc.fabric.api.client.networking.v1

Class ClientLoginNetworking

java.lang.Object

net.fabricmc.fabric.api.client.networking.v1.ClientLoginNetworking

@Environment(CLIENT)
public final class ClientLoginNetworking
extends Object

Offers access to login stage client-side networking functionalities.

The Minecraft login protocol only allows the client to respond to a server's request, but not initiate one of its own.

See Also:

• ClientPlayNetworking
• ServerLoginNetworking

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	ClientLoginNetworking.LoginQueryRequestHandler

Method Summary

Modifier and Type	Method	Description
static Set<Identifier>	getGlobalReceivers()	Gets all query request channel names which global receivers are registered for.
static boolean	registerGlobalReceiver(Identifier channelName, ClientLoginNetworking.LoginQueryRequestHandler queryHandler)	Registers a handler to a query request channel.
static boolean	registerReceiver(Identifier channelName, ClientLoginNetworking.LoginQueryRequestHandler queryHandler)	Registers a handler to a query request channel.
static ClientLoginNetworking.LoginQueryRequestHandler	unregisterGlobalReceiver(Identifier channelName)	Removes the handler of a query request channel.
static @Nullable ClientLoginNetworking.LoginQueryRequestHandler	unregisterReceiver(Identifier channelName)	Removes the handler of a query request channel.

Methods inherited from class java.lang.Object

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

Method Details

registerGlobalReceiver

public static boolean registerGlobalReceiver(Identifier channelName,
 ClientLoginNetworking.LoginQueryRequestHandler queryHandler)

Registers a handler to a query request channel. A global receiver is registered to all connections, in the present and future.

If a handler is already registered to the channel, this method will return false, and no change will be made. Use unregisterGlobalReceiver(Identifier) to unregister the existing handler.

Parameters:

channelName - the id of the channel

queryHandler - the handler

Returns:

false if a handler is already registered to the channel

See Also:

• unregisterGlobalReceiver(Identifier)
• registerReceiver(Identifier, LoginQueryRequestHandler)

unregisterGlobalReceiver

@Nullable
public static ClientLoginNetworking.LoginQueryRequestHandler unregisterGlobalReceiver(Identifier channelName)

Removes the handler of a query request channel. A global receiver is registered to all connections, in the present and future.

The channel is guaranteed not to have a handler after this call.

Parameters:

channelName - the id of the channel

Returns:

the previous handler, or null if no handler was bound to the channel

See Also:

• registerGlobalReceiver(Identifier, LoginQueryRequestHandler)
• unregisterReceiver(Identifier)

getGlobalReceivers

public static Set<Identifier> getGlobalReceivers()

Gets all query request channel names which global receivers are registered for. A global receiver is registered to all connections, in the present and future.

Returns:

all channel names which global receivers are registered for.

registerReceiver

public static boolean registerReceiver(Identifier channelName,
 ClientLoginNetworking.LoginQueryRequestHandler queryHandler)
                                throws IllegalStateException

Registers a handler to a query request channel.

If a handler is already registered to the channelName, this method will return false, and no change will be made. Use unregisterReceiver(Identifier) to unregister the existing handler.

Parameters:

channelName - the id of the channel

queryHandler - the handler

Returns:

false if a handler is already registered to the channel name

Throws:

IllegalStateException - if the client is not logging in

unregisterReceiver

@Nullable
public static @Nullable ClientLoginNetworking.LoginQueryRequestHandler unregisterReceiver(Identifier channelName)
                                                                                   throws IllegalStateException

Removes the handler of a query request channel.

The channelName is guaranteed not to have a handler after this call.

Parameters:

channelName - the id of the channel

Returns:

the previous handler, or null if no handler was bound to the channel name

Throws:

IllegalStateException - if the client is not logging in