AttributeMap (Netty API Reference (5.0.0.Alpha4))

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Module io.netty5.common

Package io.netty5.util

Interface AttributeMap

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
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.