org.snmp4j.transport |
org.snmp4j.transport
Provides transport protocol mappings for SNMP.
The org.snmp4j.transport classes are capable of sending and
receiving byte messages to and from a network using transport mapping specific
transport protocol. All SNMP4J transport mappings have to implement the
org.snmp4j.TransportMapping interface. SNMP4J supports two
transport mappings for the transport protocols UDP and TCP:
-
The UDP transport mapping is the default SNMP transport mapping. It is
implemented by the
DefaultUdpTransportMapping class.
-
The TCP transport mapping is implemented by the
DefaultTcpTransportMapping using the java.nio
package.
Additional transport mappings can be easily added. It is sufficient to
implement the org.snmp4j.TransportMapping interface and add
an instance of that class to the Snmp
(or MessageDispatcher )
object. To be able to lookup a transport mapping by an Address
class via the TransportMappings (as Snmp does
for notification listeners), a transport mapping has to be registered
in a transport mapping registration file. The default file is
transports.properties in the org.snmp4j.transport
package. To use a different file, set the system property
org.snmp4j.transportMappings .
Connection-oriented transport mappings like TCP should implement
the ConnectionOrientedTransportMapping interface to support
MessageLengthDecoder and TransportStateListener .
The following UML class diagram shows the classes of the
org.snmp4j.transport package and their relationships
(relationships to other packages are not shown):
|
Java Source File Name | Type | Comment |
AbstractTransportMapping.java | Class | The AbstractTransportMapping provides an abstract
implementation for the message dispatcher list and the maximum inbound
message size. |
ConnectionOrientedTransportMapping.java | Interface | Transport mappings for connection oriented transport protocols have to
implement this interface. |
DefaultTcpTransportMapping.java | Class | The DefaultTcpTransportMapping implements a TCP transport
mapping with the Java 1.4 new IO API. |
DefaultUdpTransportMapping.java | Class | The DefaultUdpTransportMapping implements a UDP transport
mapping based on Java standard IO and using an internal thread for
listening on the inbound socket. |
MessageLength.java | Class | The MessageLength object contains information about the
length of a message and the length of its header. |
MessageLengthDecoder.java | Interface | The MessageLengthDecoder needs to be implemented for connection
oriented transport mappings, because those transport mappings have no message
boundaries. |
TcpTransportMapping.java | Class | The TcpTransportMapping is the abstract base class for
TCP transport mappings. |
TransportListener.java | Interface | The TransportListener interface is implemented by objects
that process incoming messages from TransportMapping s, for
example
MessageDispatcher . |
TransportMappings.java | Class | The TransportMappings factory can be used to create a transport
mapping for an address class. |
TransportStateEvent.java | Class | The TransportStateEvent describes a state change for
a transport connection. |
TransportStateListener.java | Interface | The TransportStateListener interface can be implemented
to monitor the connection state for connection oriented transport mappings. |
UdpTransportMapping.java | Class | The UdpTransportMapping is the abstract base class for
UDP transport mappings. |
UnsupportedAddressClassException.java | Class | The UnsupportedAddressClassException indicates a message
exception caused by unsupported address class. |