org.echarts.servlet.sip.machines
Class B2buaSafeFSM

java.lang.Object
  org.echarts.Machine
      org.echarts.StateMachine
          org.echarts.TransitionMachine
              org.echarts.servlet.sip.machines.B2buaSafeFSM

All Implemented Interfaces:

java.io.Serializable

public class B2buaSafeFSM
extends TransitionMachine

This fragment implements a Back-to-back User Agent, going through the following steps:

• Starts from idle, i.e. no SIP calls.
• Receives INVITE on BoxPort of the box.
• If receives error final response on UAC side, terminates at FAILURE state.
• If receives CANCEL on UAS side before dialog is established, terminates at CANCELLED state.
• If SIP dialogs are successfully established, after both dialogs are terminated by BYE, terminates at END state.

Note that there are two protocol lavel race conditions related to the initial INVITE transactions and CANCEL. See the underlying B2buaInviteFSM for details.

This machine uses optional RequestModifier object to change Request-URI for outgoing INVITE.

In ACTIVE state, INFO messages are passed transparently between caller and callee.

See Also:

Serialized Form

Nested Class Summary

class

B2buaSafeFSM.ACTIVE

Field Summary

Constructor Summary

B2buaSafeFSM(FeatureBox box, java.util.Properties servletProps, javax.servlet.ServletContext context)
Used when this FSM is specified as machineClassName by EChartsSipServlet

B2buaSafeFSM(FeatureBox box, SipPort caller, SipPort callee, RequestModifier reqModifier)
Used when this FSM is invoked by a parent FSM.

Method Summary

Bye	getReceivedBye()

Methods inherited from class org.echarts.TransitionMachine

addMessagelessTransition, addMessageTransition, globalStateString, globalStateString, initializeMessagelessTransitions, initializeMessageTransitions, initializeRoot, localStateString, localStateString, removePort, run, run, runNoQueueing

Methods inherited from class org.echarts.StateMachine

setMachineDebugging, setMachineMonitor, setMachineMonitoring

Methods inherited from class org.echarts.Machine

getDefaultMachineDebugging, getDefaultMachineDebuggingGlobalStateOutput, getDefaultMachineMonitor, getDefaultMachineMonitorFilter, getDefaultMachineMonitoring, getMachineDebugging, getMachineDebuggingGlobalStateOutput, getMachineID, getMachineIndex, getMachineMonitor, getMachineMonitoring, getParentMachine, getRootMachine, getSystemDebugging, getSystemMonitoring, putEvent, setDebugging, setDefaultMachineDebugging, setDefaultMachineDebuggingGlobalStateOutput, setDefaultMachineMonitor, setDefaultMachineMonitorFilter, setDefaultMachineMonitoring, setMachineDebuggingGlobalStateOutput, setSystemDebugging, setSystemMonitoring, statePathString, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

Constructor Detail

B2buaSafeFSM

public B2buaSafeFSM(FeatureBox box,
                    SipPort caller,
                    SipPort callee,
                    RequestModifier reqModifier)
             throws java.lang.Exception

Used when this FSM is invoked by a parent FSM.

Throws:

java.lang.Exception

B2buaSafeFSM

public B2buaSafeFSM(FeatureBox box,
                    java.util.Properties servletProps,
                    javax.servlet.ServletContext context)
             throws java.lang.Exception

Used when this FSM is specified as machineClassName by EChartsSipServlet

Throws:

java.lang.Exception

Method Detail

getReceivedBye

public Bye getReceivedBye()