EventSource (Jetty :: Project 9.4.46.v20220331 API)

```
public interface EventSource
```
EventSource is the passive half of an event source connection, as defined by the EventSource Specification.

EventSource.Emitter is the active half of the connection and allows to operate on the connection.

EventSource allows applications to be notified of events happening on the connection; two events are being notified: the opening of the event source connection, where method onOpen(Emitter) is invoked, and the closing of the event source connection, where method onClose() is invoked.

See Also:

EventSourceServlet

Nested Class Summary

Nested Classes
Modifier and Type	Interface	Description
`static interface`	`EventSource.Emitter`	`EventSource.Emitter` is the active half of an event source connection, and allows applications to operate on the connection by sending events, data or comments, or by closing the connection.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`onClose()`	Callback method invoked when an event source connection is closed.
`void`	`onOpen(EventSource.Emitter emitter)`	Callback method invoked when an event source connection is opened.

- Method Detail
  - onOpen
```
void onOpen(EventSource.Emitter emitter)
     throws java.io.IOException
```
    Callback method invoked when an event source connection is opened.
    
    Parameters:
    
    emitter - the EventSource.Emitter instance that allows to operate on the connection
    
    Throws:
    
    java.io.IOException - if the implementation of the method throws such exception
  - onClose
```
void onClose()
```
    Callback method invoked when an event source connection is closed.