All Superinterfaces:

ReadStream<Buffer>, StreamBase, WriteStream<Buffer>

All Known Subinterfaces:

ClientWebSocket, ServerWebSocket, WebSocket
```
public interface WebSocketBase
extends ReadStream<Buffer>, WriteStream<Buffer>
```
Base WebSocket implementation.
It implements both ReadStream and WriteStream so it can be used with Pipe to pipe data with flow control.

Author:

Tim Fox

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`String`	`binaryHandlerID()`	When a `WebSocket` is created, it may register an event handler with the event bus - the ID of that handler is given by this method.
`WebSocketBase`	`binaryMessageHandler(Handler<Buffer> handler)`	Set a binary message handler on the connection.
`default Future<Void>`	`close()`	Close the WebSocket sending the default close frame.
`default Future<Void>`	`close(short statusCode)`	Close the WebSocket sending a close frame with specified status code.
`default Future<Void>`	`close(short statusCode, String reason)`	Close sending a close frame with specified status code and reason.
`WebSocketBase`	`closeHandler(Handler<Void> handler)`	Set a close handler.
`String`	`closeReason()`	Returns the close reason message from the remote endpoint or `null` when not yet received.
`Short`	`closeStatusCode()`	Returns the close status code received from the remote endpoint or `null` when not yet received.
`WebSocketBase`	`drainHandler(Handler<Void> handler)`	Set a drain handler on the stream.
`Future<Void>`	`end()`	Ends the stream.
`WebSocketBase`	`endHandler(Handler<Void> endHandler)`	Set an end handler.
`WebSocketBase`	`exceptionHandler(Handler<Throwable> handler)`	Set an exception handler on the read stream.
`WebSocketBase`	`fetch(long amount)`	Fetch the specified `amount` of elements.
`WebSocketBase`	`frameHandler(Handler<WebSocketFrame> handler)`	Set a frame handler on the connection.
`WebSocketBase`	`handler(Handler<Buffer> handler)`	Set a data handler.
`MultiMap`	`headers()`	Returns the HTTP headers.
`boolean`	`isClosed()`
`boolean`	`isSsl()`
`SocketAddress`	`localAddress()`
`WebSocketBase`	`pause()`	Pause the `ReadStream`, it sets the buffer in `fetch` mode and clears the actual demand.
`List<Certificate>`	`peerCertificates()`
`WebSocketBase`	`pongHandler(Handler<Buffer> handler)`	Set a pong frame handler on the connection.
`SocketAddress`	`remoteAddress()`
`WebSocketBase`	`resume()`	Resume reading, and sets the buffer in `flowing` mode.
`WebSocketBase`	`setWriteQueueMaxSize(int maxSize)`	Set the maximum size of the write queue to `maxSize`.
`default Future<Void>`	`shutdown()`	Like `shutdown(long, TimeUnit, short, String)` with a 30 seconds timeout, the status code `1000` a `null` reason.
`default Future<Void>`	`shutdown(long timeout, TimeUnit unit)`	Calls `shutdown(long, TimeUnit, short, String)` with the status code `1000` and a `null` reason.
`default Future<Void>`	`shutdown(long timeout, TimeUnit unit, short statusCode)`	Calls `shutdown(long, TimeUnit, short, String)` with a `null` reason.
`Future<Void>`	`shutdown(long timeout, TimeUnit unit, short statusCode, String reason)`	Initiate a graceful WebSocket shutdown, the shutdown handler is notified and shall close the WebSocket, otherwise after a `timeout` the WebSocket will be closed.
`default Future<Void>`	`shutdown(short statusCode)`	Like `shutdown(long, TimeUnit, short, String)` with a 30 seconds timeout and a `null` reason.
`default Future<Void>`	`shutdown(short statusCode, String reason)`	Like `shutdown(long, TimeUnit, short, String)` with a 30 seconds timeout.
`WebSocketBase`	`shutdownHandler(Handler<Void> handler)`	Set a `handler` notified when the WebSocket is shutdown: the client or server will close the connection within a certain amount of time.
`SSLSession`	`sslSession()`
`String`	`subProtocol()`	Returns the WebSocket sub protocol selected by the WebSocket handshake.
`String`	`textHandlerID()`	When a `WebSocket` is created, it may register an event handler with the eventbus, the ID of that handler is given by `textHandlerID`.
`WebSocketBase`	`textMessageHandler(Handler<String> handler)`	Set a text message handler on the connection.
`Future<Void>`	`writeBinaryMessage(Buffer data)`	Writes a (potentially large) piece of binary data to the connection.
`Future<Void>`	`writeFinalBinaryFrame(Buffer data)`	Write a final WebSocket binary frame to the connection
`Future<Void>`	`writeFinalTextFrame(String text)`	Write a final WebSocket text frame to the connection
`Future<Void>`	`writeFrame(WebSocketFrame frame)`	Write a WebSocket frame to the connection
`Future<Void>`	`writePing(Buffer data)`	Writes a ping frame to the connection.
`Future<Void>`	`writePong(Buffer data)`	Writes a pong frame to the connection.
`Future<Void>`	`writeTextMessage(String text)`	Writes a (potentially large) piece of text data to the connection.

Methods inherited from interface io.vertx.core.streams.ReadStream
collect, pipe, pipeTo

Methods inherited from interface io.vertx.core.streams.WriteStream
end, write, writeQueueFull

- Method Detail
  - exceptionHandler
```
WebSocketBase exceptionHandler(Handler<Throwable> handler)
```
    Description copied from interface: ReadStream
    
    Set an exception handler on the read stream.
    
    Specified by:
    
    exceptionHandler in interface ReadStream<Buffer>
    
    Specified by:
    
    exceptionHandler in interface StreamBase
    
    Specified by:
    
    exceptionHandler in interface WriteStream<Buffer>
    
    Parameters:
    
    handler - the exception handler
    
    Returns:
    
    a reference to this, so the API can be used fluently
  - handler
```
WebSocketBase handler(Handler<Buffer> handler)
```
    Description copied from interface: ReadStream
    
    Set a data handler. As data is read, the handler will be called with the data.
    
    Specified by:
    
    handler in interface ReadStream<Buffer>
    
    Returns:
    
    a reference to this, so the API can be used fluently
  - pause
```
WebSocketBase pause()
```
    Description copied from interface: ReadStream
    
    Pause the ReadStream, it sets the buffer in fetch mode and clears the actual demand.
    While it's paused, no data will be sent to the data handler.
    
    Specified by:
    
    pause in interface ReadStream<Buffer>
    
    Returns:
    
    a reference to this, so the API can be used fluently
  - resume
```
WebSocketBase resume()
```
    Description copied from interface: ReadStream
    
    Resume reading, and sets the buffer in flowing mode.
    If the ReadStream has been paused, reading will recommence on it.
    
    Specified by:
    
    resume in interface ReadStream<Buffer>
    
    Returns:
    
    a reference to this, so the API can be used fluently
  - fetch
```
WebSocketBase fetch(long amount)
```
    Description copied from interface: ReadStream
    
    Fetch the specified amount of elements. If the ReadStream has been paused, reading will recommence with the specified amount of items, otherwise the specified amount will be added to the current stream demand.
    
    Specified by:
    
    fetch in interface ReadStream<Buffer>
    
    Returns:
    
    a reference to this, so the API can be used fluently
  - endHandler
```
WebSocketBase endHandler(Handler<Void> endHandler)
```
    Description copied from interface: ReadStream
    
    Set an end handler. Once the stream has ended, and there is no more data to be read, this handler will be called.
    
    Specified by:
    
    endHandler in interface ReadStream<Buffer>
    
    Returns:
    
    a reference to this, so the API can be used fluently
  - setWriteQueueMaxSize
```
WebSocketBase setWriteQueueMaxSize(int maxSize)
```
    Description copied from interface: WriteStream
    
    Set the maximum size of the write queue to maxSize. You will still be able to write to the stream even if there is more than maxSize items in the write queue. This is used as an indicator by classes such as Pipe to provide flow control.
    The value is defined by the implementation of the stream, e.g in bytes for a NetSocket, etc...
    
    Specified by:
    
    setWriteQueueMaxSize in interface WriteStream<Buffer>
    
    Parameters:
    
    maxSize - the max size of the write stream
    
    Returns:
    
    a reference to this, so the API can be used fluently
  - drainHandler
```
WebSocketBase drainHandler(Handler<Void> handler)
```
    Description copied from interface: WriteStream
    
    Set a drain handler on the stream. If the write queue is full, then the handler will be called when the write queue is ready to accept buffers again. See Pipe for an example of this being used.
    The stream implementation defines when the drain handler, for example it could be when the queue size has been reduced to maxSize / 2.
    
    Specified by:
    
    drainHandler in interface WriteStream<Buffer>
    
    Parameters:
    
    handler - the handler
    
    Returns:
    
    a reference to this, so the API can be used fluently
  - binaryHandlerID
```
String binaryHandlerID()
```
    When a WebSocket is created, it may register an event handler with the event bus - the ID of that handler is given by this method.
    By default, no handler is registered, the feature must be enabled via WebSocketConnectOptions.setRegisterWriteHandlers(boolean) or HttpServerOptions.setRegisterWebSocketWriteHandlers(boolean).
    Given this ID, a different event loop can send a binary frame to that event handler using the event bus and that buffer will be received by this instance in its own event loop and written to the underlying connection. This allows you to write data to other WebSockets which are owned by different event loops.
    
    Returns:
    
    the binary handler id
    
    See Also:
    
    WebSocketConnectOptions.setRegisterWriteHandlers(boolean), HttpServerOptions.setRegisterWebSocketWriteHandlers(boolean)
  - textHandlerID
```
String textHandlerID()
```
    When a WebSocket is created, it may register an event handler with the eventbus, the ID of that handler is given by textHandlerID.
    By default, no handler is registered, the feature must be enabled via WebSocketConnectOptions.setRegisterWriteHandlers(boolean) or HttpServerOptions.setRegisterWebSocketWriteHandlers(boolean).
    Given this ID, a different event loop can send a text frame to that event handler using the event bus and that buffer will be received by this instance in its own event loop and written to the underlying connection. This allows you to write data to other WebSockets which are owned by different event loops.
    
    Returns:
    
    the text handler id
    
    See Also:
    
    WebSocketConnectOptions.setRegisterWriteHandlers(boolean), HttpServerOptions.setRegisterWebSocketWriteHandlers(boolean)
  - subProtocol
```
String subProtocol()
```
    Returns the WebSocket sub protocol selected by the WebSocket handshake.
    On the server, the value will be null when the handler receives the WebSocket callback as the handshake will not be completed yet.
  - closeStatusCode
```
Short closeStatusCode()
```
    Returns the close status code received from the remote endpoint or null when not yet received.
  - closeReason
```
String closeReason()
```
    Returns the close reason message from the remote endpoint or null when not yet received.
  - headers
```
MultiMap headers()
```
    Returns the HTTP headers.
    
    Returns:
    
    the headers
  - writeFrame
```
Future<Void> writeFrame(WebSocketFrame frame)
```
    Write a WebSocket frame to the connection
    
    Parameters:
    
    frame - the frame to write
    
    Returns:
    
    a future completed with the result
  - writeFinalTextFrame
```
Future<Void> writeFinalTextFrame(String text)
```
    Write a final WebSocket text frame to the connection
    
    Parameters:
    
    text - The text to write
    
    Returns:
    
    a future completed with the result
  - writeFinalBinaryFrame
```
Future<Void> writeFinalBinaryFrame(Buffer data)
```
    Write a final WebSocket binary frame to the connection
    
    Parameters:
    
    data - The data to write
    
    Returns:
    
    a future completed with the result
  - writeBinaryMessage
```
Future<Void> writeBinaryMessage(Buffer data)
```
    Writes a (potentially large) piece of binary data to the connection. This data might be written as multiple frames if it exceeds the maximum WebSocket frame size.
    
    Parameters:
    
    data - the data to write
    
    Returns:
    
    a future completed with the result
  - writeTextMessage
```
Future<Void> writeTextMessage(String text)
```
    Writes a (potentially large) piece of text data to the connection. This data might be written as multiple frames if it exceeds the maximum WebSocket frame size.
    
    Parameters:
    
    text - the data to write
    
    Returns:
    
    a future completed with the result
  - writePing
```
Future<Void> writePing(Buffer data)
```
    Writes a ping frame to the connection. This will be written in a single frame. Ping frames may be at most 125 bytes (octets).
    This method should not be used to write application data and should only be used for implementing a keep alive or to ensure the client is still responsive, see RFC 6455 Section section 5.5.2.
    There is no handler for ping frames because RFC 6455 clearly states that the only response to a ping frame is a pong frame with identical contents.
    
    Parameters:
    
    data - the data to write, may be at most 125 bytes
    
    Returns:
    
    a future notified when the ping frame has been successfully written
  - writePong
```
Future<Void> writePong(Buffer data)
```
    Writes a pong frame to the connection. This will be written in a single frame. Pong frames may be at most 125 bytes (octets).
    This method should not be used to write application data and should only be used for implementing a keep alive or to ensure the client is still responsive, see RFC 6455 section 5.5.2.
    There is no need to manually write a pong frame, as the server and client both handle responding to a ping from with a pong from automatically and this is exposed to users. RFC 6455 section 5.5.3 states that pongs may be sent unsolicited in order to implement a one way heartbeat.
    
    Parameters:
    
    data - the data to write, may be at most 125 bytes
    
    Returns:
    
    a future notified when the pong frame has been successfully written
  - closeHandler
```
WebSocketBase closeHandler(Handler<Void> handler)
```
    Set a close handler. This will be called when the WebSocket is closed.
    After this callback, no more messages are expected. When the WebSocket received a close frame, the closeStatusCode() will return the status code and closeReason() will return the reason.
    
    Parameters:
    
    handler - the handler
    
    Returns:
    
    a reference to this, so the API can be used fluently
  - shutdownHandler
```
WebSocketBase shutdownHandler(Handler<Void> handler)
```
    Set a handler notified when the WebSocket is shutdown: the client or server will close the connection within a certain amount of time. This gives the opportunity to the handler to close the WebSocket gracefully before the WebSocket is forcefully closed.
    
    Parameters:
    
    handler - the handler notified with the remaining shutdown
    
    Returns:
    
    a reference to this, so the API can be used fluently
  - frameHandler
```
WebSocketBase frameHandler(Handler<WebSocketFrame> handler)
```
    Set a frame handler on the connection. This handler will be called when frames are read on the connection.
    
    Parameters:
    
    handler - the handler
    
    Returns:
    
    a reference to this, so the API can be used fluently
  - textMessageHandler
```
WebSocketBase textMessageHandler(Handler<String> handler)
```
    Set a text message handler on the connection. This handler will be called similar to the binaryMessageHandler(Handler), but the buffer will be converted to a String first
    
    Parameters:
    
    handler - the handler
    
    Returns:
    
    a reference to this, so the API can be used fluently
  - binaryMessageHandler
```
WebSocketBase binaryMessageHandler(Handler<Buffer> handler)
```
    Set a binary message handler on the connection. This handler serves a similar purpose to handler(Handler) except that if a message comes into the socket in multiple frames, the data from the frames will be aggregated into a single buffer before calling the handler (using WebSocketFrame.isFinal() to find the boundaries).
    
    Parameters:
    
    handler - the handler
    
    Returns:
    
    a reference to this, so the API can be used fluently
  - pongHandler
```
WebSocketBase pongHandler(Handler<Buffer> handler)
```
    Set a pong frame handler on the connection. This handler will be invoked every time a pong frame is received on the server, and can be used by both clients and servers since the RFC 6455 section 5.5.2 and section 5.5.3 do not specify whether the client or server sends a ping.
    Pong frames may be at most 125 bytes (octets).
    There is no ping handler since ping frames should immediately be responded to with a pong frame with identical content
    Pong frames may be received unsolicited.
    
    Parameters:
    
    handler - the handler
    
    Returns:
    
    a reference to this, so the API can be used fluently
  - end
```
Future<Void> end()
```
    Ends the stream.
    Once the stream has ended, it cannot be used any more. Calls close()
    
    Specified by:
    
    end in interface WriteStream<Buffer>
    
    Returns:
    
    a future completed with the result
  - close
```
default Future<Void> close()
```
    Close the WebSocket sending the default close frame.
    No more messages can be sent.
    
    Returns:
    
    a future completed with the result
  - close
```
default Future<Void> close(short statusCode)
```
    Close the WebSocket sending a close frame with specified status code. You can give a look at various close payloads here: RFC6455 section 7.4.1
    No more messages can be sent.
    
    Parameters:
    
    statusCode - the status code
    
    Returns:
    
    a future completed with the result
  - close
```
default Future<Void> close(short statusCode,
                           String reason)
```
    Close sending a close frame with specified status code and reason. You can give a look at various close payloads here: RFC6455 section 7.4.1
    No more messages can be sent.
    
    Parameters:
    
    statusCode - the status code
    
    reason - reason of closure
    
    Returns:
    
    a future completed with the result
  - shutdown
```
default Future<Void> shutdown()
```
    Like shutdown(long, TimeUnit, short, String) with a 30 seconds timeout, the status code 1000 a null reason.
  - shutdown
```
default Future<Void> shutdown(short statusCode)
```
    Like shutdown(long, TimeUnit, short, String) with a 30 seconds timeout and a null reason.
  - shutdown
```
default Future<Void> shutdown(short statusCode,
                              String reason)
```
    Like shutdown(long, TimeUnit, short, String) with a 30 seconds timeout.
  - shutdown
```
default Future<Void> shutdown(long timeout,
                              TimeUnit unit)
```
    Calls shutdown(long, TimeUnit, short, String) with the status code 1000 and a null reason.
  - shutdown
```
default Future<Void> shutdown(long timeout,
                              TimeUnit unit,
                              short statusCode)
```
    Calls shutdown(long, TimeUnit, short, String) with a null reason.
  - shutdown
```
Future<Void> shutdown(long timeout,
                      TimeUnit unit,
                      short statusCode,
                      String reason)
```
    Initiate a graceful WebSocket shutdown, the shutdown handler is notified and shall close the WebSocket, otherwise after a timeout the WebSocket will be closed.
    The WebSocket is closed with specified status code and reason. You can give a look at various close payloads here: RFC6455 section 7.4.1
    
    Parameters:
    
    timeout - the amount of time after which all resources are forcibly closed
    
    unit - the of the timeout
    
    statusCode - the status code
    
    reason - reason of closure
    
    Returns:
    
    a future completed when shutdown has completed
  - remoteAddress
```
SocketAddress remoteAddress()
```
    Returns:
    
    the remote address for this connection, possibly null (e.g a server bound on a domain socket). If useProxyProtocol is set to true, the address returned will be of the actual connecting client.
  - localAddress
```
SocketAddress localAddress()
```
    Returns:
    
    the local address for this connection, possibly null (e.g a server bound on a domain socket) If useProxyProtocol is set to true, the address returned will be of the proxy.
  - isSsl
```
boolean isSsl()
```
    Returns:
    
    true if this HttpConnection is encrypted via SSL/TLS.
  - isClosed
```
boolean isClosed()
```
    Returns:
    
    true if the WebSocket cannot be used to send message anymore
  - sslSession
```
SSLSession sslSession()
```
    Returns:
    
    SSLSession associated with the underlying socket. Returns null if connection is not SSL.
    
    See Also:
    
    SSLSession
  - peerCertificates
```
List<Certificate> peerCertificates()
                            throws SSLPeerUnverifiedException
```
    Returns:
    
    an ordered list of the peer certificates. Returns null if connection is not SSL.
    
    Throws:
    
    SSLPeerUnverifiedException - SSL peer's identity has not been verified.
    
    See Also:
    
    (), sslSession()

Interface WebSocketBase

Method Summary

Methods inherited from interface io.vertx.core.streams.ReadStream

Methods inherited from interface io.vertx.core.streams.WriteStream

Method Detail

exceptionHandler

handler

pause

resume

fetch

endHandler

setWriteQueueMaxSize

drainHandler

binaryHandlerID

textHandlerID

subProtocol

closeStatusCode

closeReason

headers

writeFrame

writeFinalTextFrame

writeFinalBinaryFrame

writeBinaryMessage

writeTextMessage

writePing

writePong

closeHandler

shutdownHandler

frameHandler

textMessageHandler

binaryMessageHandler

pongHandler

end

close

close

close

shutdown

shutdown

shutdown

shutdown

shutdown

shutdown

remoteAddress

localAddress

isSsl

isClosed

sslSession

peerCertificates