Enclosing class:

MessageQueue
```
public static interface MessageQueue.OnFileDescriptorEventListener
```
A listener which is invoked when file descriptor related events occur.

Nested Class Summary

Nested Classes
Modifier and Type Interface Description

static interface MessageQueue.OnFileDescriptorEventListener.Events

Field Summary

Fields
Modifier and Type	Field	Description
`static int`	`EVENT_ERROR`	File descriptor event: Indicates that the file descriptor encountered a fatal error.
`static int`	`EVENT_INPUT`	File descriptor event: Indicates that the file descriptor is ready for input operations, such as reading.
`static int`	`EVENT_OUTPUT`	File descriptor event: Indicates that the file descriptor is ready for output operations, such as writing.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`int`	`onFileDescriptorEvents(FileDescriptor fd, int events)`	Called when a file descriptor receives events.

- Field Detail
  - EVENT_INPUT
```
static final int EVENT_INPUT
```
    File descriptor event: Indicates that the file descriptor is ready for input operations, such as reading.
    The listener should read all available data from the file descriptor then return true to keep the listener active or false to remove the listener.
    In the case of a socket, this event may be generated to indicate that there is at least one incoming connection that the listener should accept.
    This event will only be generated if the EVENT_INPUT event mask was specified when the listener was added.
    
    See Also:
    
    Constant Field Values
  - EVENT_OUTPUT
```
static final int EVENT_OUTPUT
```
    File descriptor event: Indicates that the file descriptor is ready for output operations, such as writing.
    The listener should write as much data as it needs. If it could not write everything at once, then it should return true to keep the listener active. Otherwise, it should return false to remove the listener then re-register it later when it needs to write something else.
    This event will only be generated if the EVENT_OUTPUT event mask was specified when the listener was added.
    
    See Also:
    
    Constant Field Values
  - EVENT_ERROR
```
static final int EVENT_ERROR
```
    File descriptor event: Indicates that the file descriptor encountered a fatal error.
    File descriptor errors can occur for various reasons. One common error is when the remote peer of a socket or pipe closes its end of the connection.
    This event may be generated at any time regardless of whether the EVENT_ERROR event mask was specified when the listener was added.
    
    See Also:
    
    Constant Field Values
- Method Detail
  - onFileDescriptorEvents
```
int onFileDescriptorEvents(FileDescriptor fd,
                           int events)
```
    Called when a file descriptor receives events.
    
    Parameters:
    
    fd - The file descriptor.
    
    events - The set of events that occurred: a combination of the EVENT_INPUT, EVENT_OUTPUT, and EVENT_ERROR event masks.
    
    Returns:
    
    The new set of events to watch, or 0 to unregister the listener.
    
    See Also:
    
    EVENT_INPUT, EVENT_OUTPUT, EVENT_ERROR

Interface MessageQueue.OnFileDescriptorEventListener

Nested Class Summary

Field Summary

Method Summary

Field Detail

EVENT_INPUT

EVENT_OUTPUT

EVENT_ERROR

Method Detail

onFileDescriptorEvents