AttributeMap (Netty API Reference (5.0.0.Alpha4))

All Known Subinterfaces:

Channel, DatagramChannel, Http2StreamChannel, ServerChannel, ServerSocketChannel, SocketChannel, UnixChannel

All Known Implementing Classes:

AbstractChannel, AbstractNioByteChannel, AbstractNioChannel, AbstractNioMessageChannel, AbstractServerChannel, DefaultAttributeMap, EmbeddedChannel, EpollDatagramChannel, EpollServerSocketChannel, EpollSocketChannel, KQueueDatagramChannel, KQueueServerSocketChannel, KQueueSocketChannel, LocalChannel, LocalServerChannel, NioDatagramChannel, NioServerSocketChannel, NioSocketChannel
```
public interface AttributeMap
```
Holds Attributes which can be accessed via AttributeKey. Implementations must be Thread-safe.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`<T> Attribute<T>`	`attr(AttributeKey<T> key)`	Get the `Attribute` for the given `AttributeKey`.
`<T> boolean`	`hasAttr(AttributeKey<T> key)`	Returns `true` if and only if the given `Attribute` exists in this `AttributeMap`.

- Method Detail
  - attr
```
<T> Attribute<T> attr(AttributeKey<T> key)
```
    Get the Attribute for the given AttributeKey. This method will never return null, but may return an Attribute which does not have a value set yet.
  - hasAttr
```
<T> boolean hasAttr(AttributeKey<T> key)
```
    Returns true if and only if the given Attribute exists in this AttributeMap.