@Public

Package org.apache.hadoop.net

Network-related classes.

Interface Summary

Interface	Description
DNSToSwitchMapping	An interface that must be implemented to allow pluggable DNS-name/IP-address to RackID resolvers.
DNSToSwitchMappingWithDependency	An interface that must be implemented to allow pluggable DNS-name/IP-address to RackID resolvers.
DomainNameResolver	This interface provides methods for the failover proxy to get IP addresses of the associated servers (NameNodes, RBF routers etc).
InnerNode
InnerNode.Factory<N extends InnerNode>
Node	The interface defines a node in a network topology.

Class Summary

Class	Description
AbstractDNSToSwitchMapping	This is a base class for DNS to Switch mappings.
CachedDNSToSwitchMapping	A cached implementation of DNSToSwitchMapping that takes an raw DNSToSwitchMapping and stores the resolved network location in a cache.
DNS	A class that provides direct and reverse lookup functionalities, allowing the querying of specific network interfaces or nameservers.
DNSDomainNameResolver	DNSDomainNameResolver wraps up the default DNS service for forward/reverse DNS lookup.
DomainNameResolverFactory	This class creates the DomainNameResolver instance based on the config.
InnerNodeImpl	InnerNode represents a switch/router of a data center or rack.
InnerNodeImpl.Factory
NetUtils
NetworkTopology	The class represents a cluster of computer with a tree hierarchical network topology.
NetworkTopologyWithNodeGroup	The class extends NetworkTopology to represents a cluster of computer with a 4-layers hierarchical network topology.
NodeBase	A base class that implements interface Node
ScriptBasedMapping	This class implements the DNSToSwitchMapping interface using a script configured via the CommonConfigurationKeysPublic.NET_TOPOLOGY_SCRIPT_FILE_NAME_KEY option.
ScriptBasedMapping.RawScriptBasedMapping	This is the uncached script mapping that is fed into the cache managed by the superclass CachedDNSToSwitchMapping
ScriptBasedMappingWithDependency	This class extends ScriptBasedMapping class and implements the DNSToSwitchMappingWithDependency interface using a script configured via the CommonConfigurationKeysPublic.NET_DEPENDENCY_SCRIPT_FILE_NAME_KEY option.
SocketInputStream	This implements an input stream that can have a timeout while reading.
SocketInputWrapper	A wrapper stream around a socket which allows setting of its timeout.
SocketOutputStream	This implements an output stream that can have a timeout while writing.
SocksSocketFactory	Specialized SocketFactory to create sockets with a SOCKS proxy
StandardSocketFactory	Specialized SocketFactory to create sockets with a SOCKS proxy
TableMapping	Simple DNSToSwitchMapping implementation that reads a 2 column text file.

Exception Summary

Exception	Description
ConnectTimeoutException	Thrown by NetUtils.connect(java.net.Socket, java.net.SocketAddress, int) if it times out while connecting to the remote host.
NetworkTopology.InvalidTopologyException