development/design

Class relations

• For extended relations, please look at a Class figure
• For details, please look at JavaDoc

Starting & initialization part

B2BUAMain class

• This is a class with the main method for starting.
  • This processes instance-ization of Provider.

Provider interface

• This carries out all the initializes.

Repository interface

• This is initialized in every layer (Manager interface).

Message part

Message interface

• This is a super class of all the messages.

Context interface

• This is a message holding the information over between layers.
  • Information until it receives from Opposite UA and is transmitted to Opposite UA.

Packet interface

• This is a message holding the information used only within a layer.
  • Information until it receives from Router and is transmitted to Router.

FlatMessage interface

• This is a message showing the normalized message.

Info interface

• This is the message which extracted only required information from the FlatMessage interface.

ControlMessage interface

• This is a message how it should operate to a layer, and for directing.

Router part

Router interface

• This carries out routing processing of a message.

RouterInfo interface

• This holds routing information.

Listener interface

• This is an interface showing the entry point of the routing point.

RouteKey interface

• This is an interface holding the routing information which a Router interface uses.

SendToKey class

• This is a class holding src and dst between layers.

B2BUA Layer

B2BUAManager interface

• This is an interface used as the entry point of the Router interface for B2BUA layer.

B2BUAModule interface

• This is an interface for defining B2BUA sequence.

B2BUAContext interface

• This is an interface for holding required dialog information.

B2BUAInfo interface

• This is a ControlMessage unit and is an interface for holding information.

UA Layer

UAManager interface

• This is an interface used as the entry point of the Router interface for UA layer.

UACommand interface

• This is an interface which defines and processes operation of a message.

UAContext interface

• This is an interface for holding required dialog information.

UAInfo interface

• This is a ControlMessage unit and is an interface for holding information.

Stack Layer

StackManager interface

• This is an interface used as the entry point of the Router interface for Stack layer.

TransactionUser interface

• This is an interface showing TU of SIP.

TransactionController interface

• This is an interface which exists for forking.

TransactionEntry interface

• This is an interface for describing concrete transaction processing.

TransactionInfo interface

• This is an interface for holding information required of TransactionEntry.

Transport Layer

• This is MINA base class. ### TransportManager interface
• This is an interface used as the entry point of the Router interface for Transport layer.