io.netty.util

Interface AttributeMap

All Known Subinterfaces:

Channel, ChannelHandlerContext, DatagramChannel, DomainSocketChannel, DuplexChannel, SctpChannel, SctpServerChannel, ServerChannel, ServerDomainSocketChannel, ServerSocketChannel, SocketChannel, UdtChannel, UdtServerChannel, UnixChannel

All Known Implementing Classes:

AbstractChannel, AbstractEpollServerChannel, AbstractEpollStreamChannel, AbstractKQueueServerChannel, AbstractKQueueStreamChannel, AbstractNioByteChannel, AbstractNioChannel, AbstractNioMessageChannel, AbstractOioByteChannel, AbstractOioChannel, AbstractOioMessageChannel, AbstractServerChannel, DefaultAttributeMap, EmbeddedChannel, EpollDatagramChannel, EpollDomainSocketChannel, EpollServerDomainSocketChannel, EpollServerSocketChannel, EpollSocketChannel, KQueueDatagramChannel, KQueueDomainSocketChannel, KQueueServerDomainSocketChannel, KQueueServerSocketChannel, KQueueSocketChannel, LocalChannel, LocalServerChannel, NioDatagramChannel, NioSctpChannel, NioSctpServerChannel, NioServerSocketChannel, NioSocketChannel, NioUdtAcceptorChannel, NioUdtByteAcceptorChannel, NioUdtByteConnectorChannel, NioUdtByteRendezvousChannel, NioUdtMessageAcceptorChannel, NioUdtMessageConnectorChannel, NioUdtMessageRendezvousChannel, OioByteStreamChannel, OioDatagramChannel, OioSctpChannel, OioSctpServerChannel, OioServerSocketChannel, OioSocketChannel, RxtxChannel

public interface AttributeMap

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

Method Summary

Modifier and Type	Method and 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.