EventSource

All Superinterfaces:

java.lang.AutoCloseable, java.io.Closeable

All Known Implementing Classes:

EventSourceResponse, HttpClient.ServerSentEventsReader
```
public interface EventSource<D>
extends java.io.Closeable
```
A source of server side emitted events

See Also:

HTML Standard: 9.2 Server-sent events, HttpClient.openEvents(Request, int)

- Nested Class Summary
  
  Nested Classes
  Modifier and Type Interface Description
  
  static interface EventSource.Event<D>
  A single Server Sent Event, received from peer.
- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  EventSource.Event<D> poll()
  Waits for the next SSE and returns an event.
  - Methods inherited from interface java.io.Closeable
    close

- Method Detail
  - poll
```
EventSource.Event<D> poll()
                   throws java.io.IOException,
                          HttpException
```
    Waits for the next SSE and returns an event. The method can block for a long time ( determined by server ). It is essential to check for null and EventSource.Event.isEmpty() before processing
    
    Returns:
    
    the next event from the stream or null, if stream was closed by either party
    
    Throws:
    
    java.io.IOException - an I/O exception occurred
    
    HttpException - an incorrect HTTP request received