The UA model for the DomainDownload Program is presented in Clause A.2.6.2. Collectively they define the components that constitute this Program. For clarity, the figures present a progression of portions of the model that complement the contents of the tables and illustrate the Program’s composition.
The type definition for the DomainDownload Program precisely represents the behaviour of the Program in terms of UA components. These components can be browsed by a Client to interpret or validate the actions of the Program.
The DomainDownloadType is a subtype derived from the ProgramStateMachineType. It specifies the use or non-use of optional ProgramStateMachineType components, valid extensions such as subordinate State Machines, and constrained attribute values applied to instances of DomainDownload Programs.
Table A.2 specifies the optional and extended components defined by the DomainDownload Type. Note the references to two sub State Machine Types, TransferStateMachine and FinishStateMachine. The DomainDownloadType omits references to the Reset Program Control Method and its associated state transition (HaltedToReady), which it does not support.
Table A.2 – DomainDownloadType
|
Attribute |
Value |
||||
|
|
Includes all non-optional attributes specified for the ProgramStateMachineType |
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|
BrowseName |
DomainDownloadType |
||||
|
IsAbstract |
False |
||||
|
References |
NodeClass |
BrowseName |
DataType |
TypeDefinition |
ModellingRule |
|
HasComponent |
Object |
TransferStateMachine |
|
StateMachineType |
Mandatory |
|
HasComponent |
Object |
FinishStateMachine |
|
StateMachineType |
Mandatory |
|
HasComponent |
Variable |
ProgramDiagnostic |
|
ProgramDiagnostic2Type |
Mandatory |
|
HasComponent |
Object |
ReadyToRunning |
|
TransitionType |
|
|
HasComponent |
Object |
RunningToHalted |
|
TransitionType |
|
|
HasComponent |
Object |
RunningToSuspended |
|
TransitionType |
|
|
HasComponent |
Object |
SuspendedToRunning |
|
TransitionType |
|
|
HasComponent |
Object |
SuspendedToHalted |
|
TransitionType |
|
|
HasComponent |
Method |
Start |
|
|
Mandatory |
|
HasComponent |
Method |
Suspend |
|
|
Mandatory |
|
HasComponent |
Method |
Halt |
|
|
Mandatory |
|
HasComponent |
Method |
Resume |
|
|
Mandatory |
|
HasComponent |
Object |
FinalResultData |
|
BaseObjectType |
Mandatory |
Table A.3 specifies the Transfer State Machine type that is a sub State Machine of the DomainDownload Program Type. This definition identifies the StateTypes that compose the substates for the Program’s Running StateType.
Table A.3 – TransferStateMachineType
|
Attribute |
Value |
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|
|
Includes all attributes specified for the FiniteStateMachineType |
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|
BrowseName |
TransferStateMachineType |
||||
|
IsAbstract |
False |
||||
|
References |
NodeClass |
BrowseName |
DataType |
TypeDefinition |
ModellingRule |
|
HasComponent |
Object |
Opening |
|
StateType |
|
|
HasComponent |
Object |
Sending |
|
StateType |
|
|
HasComponent |
Object |
Closing |
|
StateType |
|
|
|
|
|
|
|
|
|
HasComponent |
Object |
ReadyToOpening |
|
TransitionType |
|
|
HasComponent |
Object |
OpeningToSending |
|
TransitionType |
|
|
HasComponent |
Object |
SendingToClosing |
|
TransitionType |
|
|
HasComponent |
Object |
SendingToAborted |
|
TransitionType |
|
|
HasComponent |
Object |
SendingToSuspended |
|
TransitionType |
|
|
HasComponent |
Object |
SuspendedToSending |
|
TransitionType |
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|
|
|
|
|
HasComponent |
Method |
Start |
|
|
Mandatory |
|
HasComponent |
Method |
Suspend |
|
|
Mandatory |
|
HasComponent |
Method |
Halt |
|
|
Mandatory |
|
HasComponent |
Method |
Resume |
|
|
Mandatory |
Table A.3 specifies the StateTypes associated with the Transfer State Machine Type. All of these states are substates of the Running state of the base ProgramStateMachineType.
The Opening state is the preparation state for the domain download.
The Sending state is the activity state for the transfer in which the data is moved from the source to destination.
The Closing state is the cleanup phase of the download.
The component Variables of the TransferStateMachineType have additional Attributes defined in Table A.4.
Table A.4 – TransferStateMachineType Attribute values for child Nodes
|
Source Path |
Value Attribute |
Description Attribute |
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|
Statenumbers |
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|
1 |
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2 |
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3 |
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|
Transitionnumbers |
||||
|
1 |
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2 |
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3 |
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4 |
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5 |
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6 |
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Table A.5 specifies the Finish State Machine Type that is a sub State Machine of the DomainDownload ProgramStateMachineType. This definition identifies the StateTypes that compose the substate for the Program’s Halted StateType.
Table A.5 – Finish State Machine Type
|
Attribute |
Value |
||||
|
|
Includes all attributes specified for the FiniteStateMachineType |
||||
|
BrowseName |
FinishStateMachineType |
||||
|
IsAbstract |
False |
||||
|
|
|
||||
|
References |
NodeClass |
BrowseName |
Data Type |
TypeDefinition |
Modelling Rule |
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|
|
|
|
|
|
|
HasComponent |
Object |
Completed |
|
StateType |
|
|
HasComponent |
Object |
Aborted |
|
StateType |
|
The Aborted state is the terminal state that indicates an incomplete or failed domain download operation.
The Completed state is the terminal state that indicates a successful domain download.
The component Variables of the FinishStateMachineType have additional Attributes defined in Table A.6.
Table A.6 – FinishStateMachineType Attribute values for child Nodes
|
Source Path |
Value Attribute |
Description Attribute |
||
|
Statenumbers |
||||
|
8 |
|
||
|
9 |
|
||
Table A.7 specifies the constraining behaviour of a DomainDownload.
Table A.7 – DomainDownloadType Property Attributes variable values
|
NodeClass |
BrowseName |
Data Type |
Data Value |
Modelling Rule |
|
Variable |
Creatable |
Boolean |
True |
|
|
Variable |
Deletable |
Boolean |
True |
Mandatory |
|
Variable |
AutoDelete |
Boolean |
False |
Mandatory |
|
Variable |
RecycleCount |
Int32 |
0 |
Mandatory |
|
Variable |
InstanceCount |
UInt32 |
PropertyType |
|
|
Variable |
MaxInstanceCount |
UInt32 |
500 |
|
|
Variable |
MaxRecycleCount |
UInt32 |
0 |
|
A DomainDownload Program Invocation can be created and also destroyed by a Client. The Program Invocation will not delete itself when halted, but will persist until explicitly removed by the Client. A DomainDownload Program Invocation cannot be reset to restart. The Server will support up to 500 concurrent DomainDownload Program Invocations.
Figure A.3 presents a partial DomainDownloadType model that illustrates the association between the states and the DomainDownload, Transfer, and Finish State Machines. Note that the current state number for the sub State Machines is only valid when the DomainDownload active base state references the sub State Machine, Running for the Transfer current state and Halted for the Finish current state.
Figure A.3 – DomainDownloadType partial state model
Table A.8 specifies the ProgramTransitionTypes that are defined in addition to the ProgramTransitionTypes specified for Programs in Table 7. These types associate the Transfer and Finish sub State Machine states with the states of the base Program.
Table A.8 – TransferStateMachineType Additional References
|
Source Path |
Reference Type |
Is Forward |
Target Path |
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|
|
|
|
|
ToSending |
ToState |
True |
Sending |
|
|
FromState |
True |
Opening |
|
|
HasCause |
True |
Start |
|
|
HasEffect |
True |
ProgramTransitionEventType |
|
|
HasEffect |
True |
AuditProgramTransitionEventType |
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|
|
|
|
|
SendingToSending |
ToState |
True |
Sending |
|
|
FromState |
True |
Sending |
|
|
HasEffect |
True |
ProgramTransitionEventType |
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SendingToClosing |
ToState |
True |
Closing |
|
|
FromState |
True |
Sending |
|
|
HasEffect |
True |
ProgramTransitionEventType |
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SendingToAborted |
ToState |
True |
Aborted |
|
|
FromState |
True |
Sending |
|
|
HasCause |
True |
Halt |
|
|
HasEffect |
True |
ProgramTransitionEventType |
|
|
HasEffect |
True |
AuditProgramTransitionEventType |
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|
ClosingToCompleted |
ToState |
True |
Completed |
|
|
FromState |
True |
Closing |
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|
HasEffect |
True |
ProgramTransitionEventType |
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|
|
|
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SendingToSuspended |
ToState |
True |
Suspended |
|
|
FromState |
True |
Sending |
|
|
HasCause |
True |
Suspend |
|
|
HasEffect |
True |
ProgramTransitionEventType |
|
|
HasEffect |
True |
AuditProgramTransitionEventType |
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|
|
|
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SuspendedToSending |
ToState |
True |
Sending |
|
|
FromState |
True |
Suspended |
|
|
HasCause |
True |
Resume |
|
|
HasEffect |
True |
ProgramTransitionEventType |
|
|
HasEffect |
True |
AuditProgramTransitionEventType |
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SuspendedToAborted |
ToState |
True |
Aborted |
|
|
FromState |
True |
Suspended |
|
|
HasCause |
True |
Halt |
|
|
HasEffect |
True |
ProgramTransitionEventType |
|
|
HasEffect |
True |
AuditProgramTransitionEventType |
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|
|
|
|
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ReadyToOpening |
ToState |
True |
Opening |
|
|
FromState |
True |
Ready |
|
|
HasCause |
True |
Start |
|
|
HasEffect |
True |
ProgramTransitionEventType |
|
|
HasEffect |
True |
AuditProgramTransitionEventType |
Figure A.4 through Figure A.10 illustrate portions of the DomainDownloadType model. In each figure, the referenced tates, Methods, transitions, and EventTypes are identified for one or two state transitions.
Figure A.4 – Ready To Running model
Figure A.4 illustrates the model for the ReadyToRunning Program transition. The transition is caused by the Start Method. The Start Method requires three input arguments. The Method Call service is used by the Client to invoke the Start Method and pass the arguments. When successful, the Program Invocation enters the Running state and the subordinate Transfer Opening state. The Server issues two Event notifications, ReadyToRunning (2), and ToOpening (19).
Table A.9 – Start Method additions
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Attribute |
Value |
|||||
|
BrowseName |
Start |
|||||
|
IsAbstract |
False |
|||||
|
References |
NodeClass |
BrowseName |
DataType |
TypeDefinition |
ModellingRule |
|
|
HasProperty |
Variable |
InputArguments |
Argument[] |
PropertyType |
|
|
Table A.9 specifies that the Start Method for the DomainDownloadType requires input arguments. Table A.10 identifies the Start Arguments required.
|
Name |
Type |
Value |
|
Argument 1 |
structure |
|
|
name |
String |
SourcePath |
|
dataType |
NodeId |
StringNodeId |
|
valueRank |
Int32 |
-1 (-1 = scalar) |
|
arrayDimensions |
UInt32[] |
null |
|
description |
LocalizedText |
The source specifier for the domain |
|
Argument 2 |
structure |
|
|
Name |
String |
DestinationPath |
|
dataType |
NodeId |
StringNodeId |
|
valueRank |
Int32 |
-1 (-1 = scalar) |
|
arrayDimensions |
UInt32[] |
null |
|
description |
LocalizedText |
The destination specifier for the domain |
|
Argument 3 |
structure |
|
|
name |
String |
DomainName |
|
dataType |
NodeId |
StringNodeId |
|
arrayDimensions |
UInt32[] |
null |
|
valueRank |
Int32 |
-1 (-1 = scalar) |
|
description |
LocalizedText |
The name of the domain |
|
|
|
|
Figure A.5 illustrates the model for the Opening To Sending and the Sending to Closing Program transitions. As specified in the transition table, these state transitions require no Methods to occur, but rather are driven by the internal actions of the Server. Events are generated for each state transition (10 to 12), when they occur.
Figure A.5 – Opening To Sending To Closing model
Notice that a state transition can initiate and terminate at the same state (Sending). In this case the transition serves a purpose. The ProgramTransitionEventType effect referenced by the SendingToSending state transition has an IntermediateResultData Object Reference. The IntermediateResultData Object serves to identify two Variables whose values are obtained each time the state transition occurs. The values are sent to the Client with the Event notification. Table A.11 defines the IntermediateResults ObjectType and Table A.12 defines the Variables of the ObjectType.
Table A.11 – IntermediateResults Object
|
Attribute |
Value |
||||
|
|
Includes all attributes specified for the ObjectType |
||||
|
BrowseName |
IntermediateResults |
||||
|
IsAbstract |
False |
||||
|
|
|
||||
|
References |
NodeClass |
BrowseName |
Data Type |
TypeDefinition |
Modelling Rule |
|
HasComponent |
Variable |
AmountTransferred |
Long |
VariableType |
Mandatory |
|
HasComponent |
Variable |
PercentageTransferred |
Long |
VariableType |
Mandatory |
|
|
|
|
|
|
|
Table A.12 – Intermediate result data Variables
|
Intermediate Result Variables |
Type |
Value |
|
Variable 1 |
Structure |
|
|
Name |
String |
AmountTransferred |
|
dataType |
NodeId |
StringNodeId |
|
description |
LocalizedText |
Bytes of domain data transferred. |
|
Variable 2 |
Structure |
|
|
Name |
String |
PercentageTransferred |
|
dataType |
NodeId |
StringNodeId |
|
description |
LocalizedText |
Percentage of domain data transferred. |
The model for the Running To Suspended state transition is illustrated in Figure A.6. The cause for this transition is the Suspend Method. The Client can pause the download of domain data to the control. The transition from Running to Suspended invokes the Event generation for TransitionEventTypes 5 and 16. Note that there is no longer a valid current state for the Transfer State Machine.
Figure A.6 – Running To Suspended model
The model for the SuspendedToRunning state transition is illustrated in Figure A.7. The cause for this transition is the Resume Method. The Client can resume the download of domain data to the control. The transition from Suspended to Running generates the Event for TransitionEventTypes 6 and 17. Now that the Running state is active, the Sending state of the Transfer State Machine is again specified for the CurrentStateNumber.
Figure A.7 – Suspended To Running model
The model for the Running To Halted state transition for an abnormal termination of the domain download is illustrated in Figure A.8. The cause for this transition is the Halt Method. The Client can terminate the download of domain data to the control. The transition from Running To Halted generates the Event for TransitionEventTypes 3 and 15. The TransitionEventType 15 indicates the transition from the Sending state as the Running State ends and then to the Aborted state as the Halted state is entered.
Figure A.8 – Running To Halted – Aborted model
Figure A.9 illustrates the model for the Suspended To Halted state transition for an abnormal termination of the domain download. The cause for this transition is the Halt Method. The Client can terminate the download of domain data to the control while it is suspended. The transition from SuspendedToHalted invokes the Event notifiers for TransitionEventTypes 7 and 18.
Figure A.9 – Suspended To Aborted model
The model for the Running To Completed state transition for a normal termination of the domain download is illustrated in Figure A.10. The cause for this transition is internal. The transition from Closing To Halted generates the Event for TransitionEventTypes 3 and 14. The TransitionEventType 14 indicates the transition from the Closing state as the Running state ends and then to the Completed state as the Halted state is entered.
The DomainDownloadType includes a component reference to a FinalResultData Object. This Object references Variables that persists information about the domain download once it has completed. This data can be read by Clients who are not subscribed to Event notifications. The result data is described in Table A.13.
|
Attribute |
Value |
||||
|
|
Includes all attributes specified for the ObjectType |
||||
|
BrowseName |
FinalResultData |
||||
|
IsAbstract |
False |
||||
|
|
|
||||
|
References |
NodeClass |
BrowseName |
Data Type |
TypeDefinition |
Modelling Rule |
|
HasComponent |
Variable |
DownloadPerformance |
Double |
BaseDataVariableType |
Mandatory |
|
HasComponent |
Variable |
FailureDetails |
String |
BaseDataVariableType |
Mandatory |
The Domain Download net transfer data rate and detailed reason for aborted downloads is retained as final result data for each Program Invocation.
DownloadPerformance provides the data rate in seconds for domain data transferred.
FailureDetails provides a descriptive reason for an abort.
Figure A.10 – Running To Completed model
Figure A.11 illustrates a normal sequence of service exchanges between a Client and Server that would occur during the life cycle of a DomainDownloadType Program Invocation.
Figure A.11 – Sequence of operations
____________