ServerSentEventConnection (Undertow 2.0.30.Final API)

java.lang.Object
- io.undertow.server.handlers.sse.ServerSentEventConnection

All Implemented Interfaces:

Attachable, Closeable, AutoCloseable, Channel
```
public class ServerSentEventConnection
extends Object
implements Channel, Attachable
```
Represents the server side of a Server Sent Events connection. The class implements Attachable, which provides access to the underlying exchanges attachments.

Author:

Stuart Douglas

Nested Class Summary

Nested Classes
Modifier and Type Class and Description

static interface ServerSentEventConnection.EventCallback

Nested Classes
Modifier and Type	Class and Description
`static interface`	`ServerSentEventConnection.EventCallback`

Constructor Summary

Constructors
Constructor and Description

ServerSentEventConnection(HttpServerExchange exchange, org.xnio.channels.StreamSinkChannel sink)

Constructors
Constructor and Description
`ServerSentEventConnection(HttpServerExchange exchange, org.xnio.channels.StreamSinkChannel sink)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`addCloseTask(org.xnio.ChannelListener<ServerSentEventConnection> listener)` Adds a listener that will be invoked when the channel is closed
`<T> void`	`addToAttachmentList(AttachmentKey<AttachmentList<T>> key, T value)` Add a value to a list-typed attachment key.
`void`	`close()`
`Account`	`getAccount()`
`<T> T`	`getAttachment(AttachmentKey<T> key)` Get an attachment value.
`<T> List<T>`	`getAttachmentList(AttachmentKey<? extends List<T>> key)` Gets a list attachment value.
`long`	`getKeepAliveTime()`
`String`	`getParameter(String name)`
`Principal`	`getPrincipal()`
`Map<String,Object>`	`getProperties()`
`Map<String,Deque<String>>`	`getQueryParameters()`
`String`	`getQueryString()`
`HeaderMap`	`getRequestHeaders()`
`String`	`getRequestURI()`
`HeaderMap`	`getResponseHeaders()`
`boolean`	`isOpen()`
`<T> T`	`putAttachment(AttachmentKey<T> key, T value)` Set an attachment value.
`<T> T`	`removeAttachment(AttachmentKey<T> key)` Remove an attachment, returning its previous value.
`void`	`send(String data)` Sends an event to the remote client
`void`	`send(String data, ServerSentEventConnection.EventCallback callback)` Sends an event to the remote client
`void`	`send(String data, String event, String id, ServerSentEventConnection.EventCallback callback)` Sends an event to the remote client
`void`	`sendRetry(long retry)` Sends the 'retry' message to the client, instructing it how long to wait before attempting a reconnect.
`void`	`sendRetry(long retry, ServerSentEventConnection.EventCallback callback)` Sends the 'retry' message to the client, instructing it how long to wait before attempting a reconnect.
`void`	`setKeepAliveTime(long keepAliveTime)` Sets the keep alive time in milliseconds.
`void`	`setParameter(String name, String value)`
`void`	`shutdown()` execute a graceful shutdown once all data has been sent

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

- Constructor Detail
  - ServerSentEventConnection
```
public ServerSentEventConnection(HttpServerExchange exchange,
                                 org.xnio.channels.StreamSinkChannel sink)
```
- Method Detail
  - addCloseTask
```
public void addCloseTask(org.xnio.ChannelListener<ServerSentEventConnection> listener)
```
    Adds a listener that will be invoked when the channel is closed
    
    Parameters:
    
    listener - The listener to invoke
  - getPrincipal
```
public Principal getPrincipal()
```
    Returns:
    
    The principal that was associated with the SSE request
  - getAccount
```
public Account getAccount()
```
    Returns:
    
    The account that was associated with the SSE request
  - getRequestHeaders
```
public HeaderMap getRequestHeaders()
```
    Returns:
    
    The request headers from the initial request that opened this connection
  - getResponseHeaders
```
public HeaderMap getResponseHeaders()
```
    Returns:
    
    The response headers from the initial request that opened this connection
  - getRequestURI
```
public String getRequestURI()
```
    Returns:
    
    The request URI from the initial request that opened this connection
  - getQueryParameters
```
public Map<String,Deque<String>> getQueryParameters()
```
    Returns:
    
    the query parameters
  - getQueryString
```
public String getQueryString()
```
    Returns:
    
    the query string
  - send
```
public void send(String data)
```
    Sends an event to the remote client
    
    Parameters:
    
    data - The event data
  - send
```
public void send(String data,
                 ServerSentEventConnection.EventCallback callback)
```
    Sends an event to the remote client
    
    Parameters:
    
    data - The event data
    
    callback - A callback that is notified on Success or failure
  - sendRetry
```
public void sendRetry(long retry)
```
    Sends the 'retry' message to the client, instructing it how long to wait before attempting a reconnect.
    
    Parameters:
    
    retry - The retry time in milliseconds
  - sendRetry
```
public void sendRetry(long retry,
                      ServerSentEventConnection.EventCallback callback)
```
    Sends the 'retry' message to the client, instructing it how long to wait before attempting a reconnect.
    
    Parameters:
    
    retry - The retry time in milliseconds
    
    callback - The callback that is notified on success or failure
  - send
```
public void send(String data,
                 String event,
                 String id,
                 ServerSentEventConnection.EventCallback callback)
```
    Sends an event to the remote client
    
    Parameters:
    
    data - The event data
    
    event - The event name
    
    id - The event ID
    
    callback - A callback that is notified on Success or failure
  - getParameter
```
public String getParameter(String name)
```
  - setParameter
```
public void setParameter(String name,
                         String value)
```
  - getProperties
```
public Map<String,Object> getProperties()
```
  - getKeepAliveTime
```
public long getKeepAliveTime()
```
    Returns:
    
    The keep alive time
  - setKeepAliveTime
```
public void setKeepAliveTime(long keepAliveTime)
```
    Sets the keep alive time in milliseconds. If this is larger than zero a ':' message will be sent this often (assuming there is no activity) to keep the connection alive. The spec recommends a value of 15000 (15 seconds).
    
    Parameters:
    
    keepAliveTime - The time in milliseconds between keep alive messaged
  - shutdown
```
public void shutdown()
```
    execute a graceful shutdown once all data has been sent
  - isOpen
```
public boolean isOpen()
```
    Specified by:
    
    isOpen in interface Channel
  - close
```
public void close()
           throws IOException
```
    Specified by:
    
    close in interface Closeable
    
    Specified by:
    
    close in interface AutoCloseable
    
    Specified by:
    
    close in interface Channel
    
    Throws:
    
    IOException
  - getAttachment
```
public <T> T getAttachment(AttachmentKey<T> key)
```
    Description copied from interface: Attachable
    
    Get an attachment value. If no attachment exists for this key, null is returned.
    
    Specified by:
    
    getAttachment in interface Attachable
    
    Type Parameters:
    
    T - the value type
    
    Parameters:
    
    key - the attachment key
    
    Returns:
    
    the value, or null if there is none
  - getAttachmentList
```
public <T> List<T> getAttachmentList(AttachmentKey<? extends List<T>> key)
```
    Description copied from interface: Attachable
    
    Gets a list attachment value. If not attachment exists for this key an empty list is returned
    
    Specified by:
    
    getAttachmentList in interface Attachable
    
    Type Parameters:
    
    T - the value type
    
    Parameters:
    
    key - the attachment key
    
    Returns:
    
    the value, or an empty list if there is none
  - putAttachment
```
public <T> T putAttachment(AttachmentKey<T> key,
                           T value)
```
    Description copied from interface: Attachable
    
    Set an attachment value. If an attachment for this key was already set, return the original value. If the value being set is null, the attachment key is removed.
    
    Specified by:
    
    putAttachment in interface Attachable
    
    Type Parameters:
    
    T - the value type
    
    Parameters:
    
    key - the attachment key
    
    value - the new value
    
    Returns:
    
    the old value, or null if there was none
  - removeAttachment
```
public <T> T removeAttachment(AttachmentKey<T> key)
```
    Description copied from interface: Attachable
    
    Remove an attachment, returning its previous value.
    
    Specified by:
    
    removeAttachment in interface Attachable
    
    Type Parameters:
    
    T - the value type
    
    Parameters:
    
    key - the attachment key
    
    Returns:
    
    the old value, or null if there was none
  - addToAttachmentList
```
public <T> void addToAttachmentList(AttachmentKey<AttachmentList<T>> key,
                                    T value)
```
    Description copied from interface: Attachable
    
    Add a value to a list-typed attachment key. If the key is not mapped, add such a mapping.
    
    Specified by:
    
    addToAttachmentList in interface Attachable
    
    Type Parameters:
    
    T - the list value type
    
    Parameters:
    
    key - the attachment key
    
    value - the value to add

Class ServerSentEventConnection

Nested Class Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

ServerSentEventConnection

Method Detail

addCloseTask

getPrincipal

getAccount

getRequestHeaders

getResponseHeaders

getRequestURI

getQueryParameters

getQueryString

send

send

sendRetry

sendRetry

send

getParameter

setParameter

getProperties

getKeepAliveTime

setKeepAliveTime

shutdown

isOpen

close

getAttachment

getAttachmentList

putAttachment

removeAttachment

addToAttachmentList