WebSocketClientExtensionHandler (Netty API Reference (5.0.0.Alpha4))

java.lang.Object
- io.netty5.handler.codec.http.websocketx.extensions.WebSocketClientExtensionHandler

All Implemented Interfaces:

ChannelHandler

Direct Known Subclasses:

WebSocketClientCompressionHandler
```
public class WebSocketClientExtensionHandler
extends Object
implements ChannelHandler
```
This handler negotiates and initializes the WebSocket Extensions. This implementation negotiates the extension with the server in a defined order, ensures that the successfully negotiated extensions are consistent between them, and initializes the channel pipeline with the extension decoder and encoder. Find a basic implementation for compression extensions at io.netty5.handler.codec.http.websocketx.extensions.compression.WebSocketClientCompressionHandler.

Constructor Summary

Constructors
Constructor Description

WebSocketClientExtensionHandler(WebSocketClientExtensionHandshaker... extensionHandshakers)
Constructor

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`channelRead(ChannelHandlerContext ctx, Object msg)`	Invoked when the current `Channel` has read a message from the peer.
`Future<Void>`	`write(ChannelHandlerContext ctx, Object msg)`	Called once a write operation is made.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface io.netty5.channel.ChannelHandler
bind, channelActive, channelExceptionCaught, channelInactive, channelInboundEvent, channelReadComplete, channelRegistered, channelShutdown, channelUnregistered, channelWritabilityChanged, close, connect, deregister, disconnect, flush, handlerAdded, handlerRemoved, isSharable, pendingOutboundBytes, read, register, sendOutboundEvent, shutdown

- Constructor Detail
  - WebSocketClientExtensionHandler
```
public WebSocketClientExtensionHandler(WebSocketClientExtensionHandshaker... extensionHandshakers)
```
    Constructor
    
    Parameters:
    
    extensionHandshakers - The extension handshaker in priority order. A handshaker could be repeated many times with fallback configuration.
- Method Detail
  - write
```
public Future<Void> write(ChannelHandlerContext ctx,
                          Object msg)
```
    Description copied from interface: ChannelHandler
    
    Called once a write operation is made. The write operation will write the messages through the ChannelPipeline. Those are then ready to be flushed to the actual Channel once Channel.flush() is called.
    
    Specified by:
    
    write in interface ChannelHandler
    
    Parameters:
    
    ctx - the ChannelHandlerContext for which the write operation is made
    
    msg - the message to write
    
    Returns:
    
    the Future which will be notified once the operation completes.
  - channelRead
```
public void channelRead(ChannelHandlerContext ctx,
                        Object msg)
                 throws Exception
```
    Description copied from interface: ChannelHandler
    
    Invoked when the current Channel has read a message from the peer.
    
    Specified by:
    
    channelRead in interface ChannelHandler
    
    Throws:
    
    Exception