Package io.netty.util

Interface AttributeMap

All Known Subinterfaces:

Channel, ChannelHandlerContext, DatagramChannel, DomainDatagramChannel, DomainSocketChannel, DuplexChannel, Http2StreamChannel, SctpChannel, SctpServerChannel, ServerChannel, ServerDomainSocketChannel, ServerSocketChannel, SocketChannel, UnixChannel

All Known Implementing Classes:

AbstractChannel, AbstractChannelHandlerContext, AbstractEpollChannel, AbstractEpollServerChannel, AbstractEpollStreamChannel, AbstractHttp2StreamChannel, AbstractKQueueChannel, AbstractKQueueDatagramChannel, AbstractKQueueServerChannel, AbstractKQueueStreamChannel, AbstractNioByteChannel, AbstractNioChannel, AbstractNioMessageChannel, AbstractOioByteChannel, AbstractOioChannel, AbstractOioMessageChannel, AbstractServerChannel, CombinedChannelDuplexHandler.DelegatingChannelHandlerContext, DefaultAttributeMap, DefaultChannelHandlerContext, DefaultChannelPipeline.HeadContext, DefaultChannelPipeline.TailContext, EmbeddedChannel, EpollDatagramChannel, EpollDomainDatagramChannel, EpollDomainSocketChannel, EpollServerDomainSocketChannel, EpollServerSocketChannel, EpollSocketChannel, FailedChannel, Http2MultiplexCodec.Http2MultiplexCodecStreamChannel, Http2MultiplexHandler.Http2MultiplexHandlerStreamChannel, KQueueDatagramChannel, KQueueDomainDatagramChannel, KQueueDomainSocketChannel, KQueueServerDomainSocketChannel, KQueueServerSocketChannel, KQueueSocketChannel, LocalChannel, LocalServerChannel, NioDatagramChannel, NioDomainSocketChannel, NioSctpChannel, NioSctpServerChannel, NioServerDomainSocketChannel, NioServerSocketChannel, NioSocketChannel, OioByteStreamChannel, OioDatagramChannel, OioSctpChannel, OioSctpServerChannel, OioServerSocketChannel, OioSocketChannel

public interface AttributeMap

Holds Attributes which can be accessed via AttributeKey. Implementations must be Thread-safe.

Method Summary

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 Details

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.