DefaultAttributeMap (Netty API Reference (4.2.7.Final))

java.lang.Object
- io.netty.util.DefaultAttributeMap

All Implemented Interfaces:

AttributeMap

Direct Known Subclasses:

AbstractChannel
```
public class DefaultAttributeMap
extends java.lang.Object
implements AttributeMap
```
Default AttributeMap implementation which not exibit any blocking behaviour on attribute lookup while using a copy-on-write approach on the modify path.
Attributes lookup and remove exibit O(logn) time worst-case complexity, hence attribute::set(null) is to be preferred to remove.

Constructor Summary

Constructors
Constructor Description

DefaultAttributeMap()

Method Summary

All Methods Instance Methods Concrete 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`.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - DefaultAttributeMap
```
public DefaultAttributeMap()
```
- Method Detail
  - attr
```
public <T> Attribute<T> attr(AttributeKey<T> key)
```
    Description copied from interface: AttributeMap
    
    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.
    
    Specified by:
    
    attr in interface AttributeMap
  - hasAttr
```
public <T> boolean hasAttr(AttributeKey<T> key)
```
    Description copied from interface: AttributeMap
    
    Returns true if and only if the given Attribute exists in this AttributeMap.
    
    Specified by:
    
    hasAttr in interface AttributeMap