...
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@startuml
autonumber
participant ApplicationManager
participant RialtoServerManager
ApplicationManager -> RialtoServerManager: create(state_observer, config)
note right: config allows app manager to specify number of preloaded servers, path to RialtoApplicationSessionServer binary, startup timer and heathcheck interval
loop For num of preloaded server
RialtoServerManager -> RialtoServerManager: Generate socketpair for Rialto Application Session Server to Server Manager communication
RialtoServerManager -> RialtoServerManager: Read Rialto-Config json file and load config.
RialtoServerManager -> RialtoServerManager: Read Rialto-Config json overrides file and override config.
loop For num of preloaded server
ref over RialtoServerManager, RialtoApplicationSessionServer : [[#RialtoApplicationSessionManagement-NotRunning→Unitialized(serverpreloading) Not Running→Unitialized (server preloading)]]
end
RialtoServerManager --> ApplicationManager: RialtoApplicationSessionServer **: Spawn(server_manager_socket)
note left
@enduml |
Rialto Application State Changes
Not Running→Unitialized (server preloading)
| PlantUML Macro |
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@startuml
autonumber
participant RialtoServerManager
Spawn Application
Session Servers to speed up app launch time.
end note
RialtoServerManager -> RialtoServerManager: Start [startup] second READY timerGenerate socketpair for Rialto Application Session Server to Server Manager communication
RialtoServerManager --> RialtoApplicationSessionServer ApplicationManager**: Spawn(server_manager_socket)
note left
Spawn preloaded Application
Session Servers to speed up app launch time.
end note
RialtoServerManager OK/ERROR
RialtoApplicationSessionServer -> RialtoApplicationSessionServerRialtoServerManager: Set current_state = Start [startup] second READY timer
RialtoApplicationSessionServer -> RialtoApplicationSessionServer: Set current_state = Uninitialised
alt RialtoApplicationSessionServer started successfully
RialtoApplicationSessionServer -// RialtoServerManager: stateChanged(AppState::Uninitialised)
RialtoServerManager -> RialtoServerManager: Cancel READY timer
else Session Server initialisation failed
RialtoServerManager -//> ApplicationManagerRialtoServerManager: stateChanged(application_id, AppState::Uninitialised)
else Session Server initialisation failed
RialtoApplicationSessionServer -// RialtoServerManager: stateChanged(AppState::Error)Cancel READY timer
RialtoApplicationSessionServer -> RialtoApplicationSessionServer: Unbind/free session management socket (if created)
RialtoApplicationSessionServer -> RialtoApplicationSessionServer !!: Exit process
else READY timer expired
RialtoServerManager -> RialtoServerManager: Kill spawned Rialto Application CancelSession READYServer timerprocess
RialtoApplicationSessionServer -> RialtoApplicationSessionServer: !!: Unbind/free session management socket (if created)
end
@enduml |
Not Running (no server preloading)/Unitialized (server preloading)→Inactive
| PlantUML Macro |
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| format | SVG |
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| title | Not Running to Inactive |
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@startuml
autonumber
participant ApplicationManager
participant RialtoServerManager
ApplicationManagerExit process
RialtoServerManager -//> ApplicationManagerRialtoServerManager: stateChangedinitiateApplication(application_id, AppState::Error)
else READY timer expired
Inactive, app_config)
alt There are no preloaded servers
RialtoServerManager -> RialtoServerManager: KillGenerate socketpair spawnedfor Rialto Application Session Server processto Server Manager communication
RialtoServerManager -// ApplicationManager:> RialtoApplicationSessionServer **: Spawn(server_manager_socket)
RialtoServerManager -> RialtoServerManager: stateChanged(application_id, AppState::Error)
end
end
@enduml |
Rialto Application State Changes
Not Running→Inactive
| PlantUML Macro |
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| format | SVG |
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| title | Not Running to Inactive |
|---|
|
@startuml
autonumber
participant ApplicationManager
participant RialtoServerManager
ApplicationManager Start [startup] second READY timer
RialtoApplicationSessionServer -> RialtoServerManagerRialtoApplicationSessionServer: Set current_state = Uninitialised
alt RialtoApplicationSessionServer started successfully
RialtoApplicationSessionServer -// RialtoServerManager: initiateApplication(application_id, AppState::Inactive, app_config)
note right: app_config allows app manager to specify the socket name to use for Rialto client/server session management
opt Socket name not specified in app_config
RialtoServerManager stateChanged(AppState::Uninitialised)
RialtoServerManager -> RialtoServerManager: ->Cancel READY timer
RialtoServerManager: -// ApplicationManager: Generate unique session_management_socket_name for Rialto Client to Rialto Application Session Server communication
end
RialtoServerManager stateChanged(application_id, AppState::Uninitialised)
ref over ApplicationManager, RialtoApplicationSessionServer : [[#RialtoApplicationSessionManagement-Unitialized→Inactive Unitialized→Inactive]]
else Session Server initialisation failed
RialtoApplicationSessionServer -> RialtoServerManagerRialtoApplicationSessionServer: Unbind/free session management socket (if created)
RialtoApplicationSessionServer -// RialtoServerManager: Generate socketpair for Rialto Application Session Server to Server Manager communication stateChanged(AppState::Error)
RialtoServerManager -> RialtoApplicationSessionServer **RialtoServerManager: Spawn(server_manager_socket, session_management_socket_name)
note left
Depending on configuration, Rialto Server Manager
may maintain a pool of pre-loaded Application
Session ServersCancel inREADY which case one of these will
be used to speed up app launch time.
end notetimer
RialtoApplicationSessionServer -> RialtoApplicationSessionServer !!: Exit process
RialtoServerManager ->// RialtoServerManagerApplicationManager: Start [1] second stateChanged(application_id, AppState::Error)
else READY timer expired
RialtoServerManager --> ApplicationManagerRialtoServerManager: Kill OK/ERROR
RialtoApplicationSessionServer -> RialtoApplicationSessionServer: Set current_state = Uninitialised
alt RialtoApplicationSessionServer started successfully
RialtoApplicationSessionServerspawned Rialto Application Session Server process
RialtoServerManager -// RialtoServerManagerApplicationManager: stateChanged(application_id, AppState::UninitialisedError)
RialtoServerManager
end
else There are preloaded servers
note over ApplicationManager, RialtoApplicationSessionServer: Pick 1st free preloaded -> RialtoServerManager: Cancel READY timerserver (it's already in unitialized state)
ref over ApplicationManager, RialtoApplicationSessionServer : [[#RialtoApplicationSessionManagement-Unitialized→Inactive Unitialized→Inactive]]
RialtoServerManager --//> ApplicationManager: stateChanged(application_id, AppState::Uninitialised)
RialtoServerManager OK/ERROR
end
@enduml |
Unitialized→Inactive
| PlantUML Macro |
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| format | SVG |
|---|
| title | Not Running to Inactive |
|---|
|
@startuml
autonumber
participant ApplicationManager
participant RialtoServerManager
opt session_management_socket_name not specified in app_config
RialtoServerManager -> RialtoApplicationSessionServerRialtoServerManager: SetConfiguration( Generate unique session_management_socket_name, AppState::Inactive, resources, log_level) for Rialto Client to Rialto Application Session Server communication
end
note right
"resources" structure will "app_config allows app manager to specify the maximumsocket decoder resources that the
application is permittedname
to use. Forfor nowRialto itclient/server shallsession havemanagement a max_playback_sessions
property
and a supports_web_audio flag. This may be enhanced for things like
HD/UHD, audio only etc in future.
end note
RialtoApplicationSessionServer --> RialtoServerManager:
RialtoApplicationSessionServerthe socket name for communication with a display server"
end note
RialtoServerManager -> RialtoApplicationSessionServer: Create listening socket & bind to SetConfiguration(session_management_socket_name
alt State transition successful
RialtoApplicationSessionServer -> RialtoApplicationSessionServer: Set current_state = Inactive
RialtoApplicationSessionServer -// RialtoServerManager: stateChanged(AppState::Inactive)
RialtoServerManager -// ApplicationManager: StateChanged(application_id, AppState::Inactive)
ApplicationManager -> RialtoServerManager: getAppConnectionInfo()
RialtoServerManager, AppState::Inactive, resources, log_level, display_name)
note right
"resources" structure will specify the maximum decoder resources that the
application is permitted to use. For now it shall have a max_playback_sessions
property and a supports_web_audio flag. This may be enhanced for things like
HD/UHD, audio only etc in future.
end note
RialtoApplicationSessionServer --> RialtoServerManager:
RialtoApplicationSessionServer -> RialtoApplicationSessionServer: Create listening socket & bind to session_management_socket_name
opt display_name defined
RialtoApplicationSessionServer -> RialtoApplicationSessionServer: Set WAYLAND_DISPLAY environment variable
end
alt State transition successful
RialtoApplicationSessionServer -> RialtoApplicationSessionServer: Set current_state = Inactive
RialtoApplicationSessionServer -// RialtoServerManager: -->stateChanged(AppState::Inactive)
RialtoServerManager -// ApplicationManager: session_management_socket_name
else State transition failed
RialtoApplicationSessionServer -> RialtoApplicationSessionServer:StateChanged(application_id, AppState::Inactive)
ApplicationManager Unbind/free session management socket (if created)
RialtoApplicationSessionServer -//> RialtoServerManager: stateChangedgetAppConnectionInfo(AppState::Error)
RialtoServerManager -//-> ApplicationManager: stateChanged(application_id, AppState::Error)
RialtoApplicationSessionServer -> RialtoApplicationSessionServer !!: Exit process
end
else Session Server initialisation session_management_socket_name
else State transition failed
RialtoApplicationSessionServer -> RialtoApplicationSessionServer: Unbind/free session management socket (if created)
RialtoApplicationSessionServer -// RialtoServerManager: stateChanged(AppState::Error)
RialtoServerManager ->// RialtoServerManagerApplicationManager: Cancel READY timer stateChanged(application_id, AppState::Error)
RialtoApplicationSessionServer -> RialtoApplicationSessionServer !!: Exit process
end
RialtoServerManageropt Server preloading is active
note over ApplicationManager, RialtoApplicationSessionServer: Preload RialtoApplicationSessionServer in place -// ApplicationManager: stateChanged(application_id, AppState::Error)
else READY timer expired
RialtoServerManager -> RialtoServerManager: Kill spawned Rialto Application Session Server process
RialtoServerManager -// ApplicationManager: stateChanged(application_id, AppState::Error)
end
@endumlof the one that has just been allocated
ref over ApplicationManager, RialtoApplicationSessionServer : [[#RialtoApplicationSessionManagement-NotRunning→Unitialized(serverpreloading) Not Running→Unitialized (server preloading)]]
end
@enduml |
3. socketpair is used to create the point-to-point IPC channel used for all Rialto Server Manager to Rialto Application Session Server communications
8. Application Session Server sends first message so Server Manager knows that it is now up and running
13. Session server creates the socket that the app will use for sending AV 3. socketpair is used to create the point-to-point IPC channel used for all Rialto Server Manager to Rialto Application Session Server communications
8. Application Session Server sends first message so Server Manager knows that it is now up and running
13. Session server creates the socket that the app will use for sending AV data and control respectively.
17/18. Server Manager has an API to allow the Application Manager to get the socket name that the App will use for communication with Rialto which it should fetch as soon as it is notified that Rialto has moved the app out of the Not Running state so that it can be passed to the app/container when it is launched (this is optional as the app manager can supply the socket name in step 1)
...
| PlantUML Macro |
|---|
| format | SVG |
|---|
| title | Launch application in Inactive state |
|---|
|
@startuml
autonumber
participant ApplicationManager
participant RialtoApplicationSessionServer
ref over ApplicationManager, RialtoApplicationSessionServer : [[#RialtoApplicationSessionManagement-NotRunning→Inactive Not Running to Inactive]]
ApplicationManager
autonumber
participant ApplicationManager
participant RialtoApplicationSessionServer
ref over ApplicationManager, RialtoApplicationSessionServer : [[#RialtoApplicationSessionManagement-NotRunning→Inactive Not Running to Inactive]]
ApplicationManager -> Application ** : Spawn(AppState::Inactive, listening_socket_name)
Application -> RialtoClient ** : Load RialtoClient library
Application -> RialtoClient Application: ** : Spawn(AppState::Inactive, listening_socket_nameregisterClient()
ApplicationRialtoClient -> RialtoClient ** : Load RialtoClient library
RialtoClientRialtoApplicationSessionServer: Connect(rialto_listening_socket)
note right
Connect is not an API call, it is establishing IPC channel with server
end note
opt first registerClient call
RialtoClient -> RialtoApplicationSessionServer: Connect(rialto_listening_socket)
note right
Connect is not an API call, it is establishing IPC channel with server
end note registerClient()
RialtoApplicationSessionServer --> RialtoClient: status, AppState::Inactive
end
RialtoClient --> Application: status, AppState::Inactive
Application -// ApplicationManager: stateChanged(AppState::Inactive)
@enduml |
...
| PlantUML Macro |
|---|
| format | SVG |
|---|
| title | Launch application in Running state |
|---|
|
@startuml
autonumber
participant ApplicationManager
participant RialtoApplicationSessionServer
ref over ApplicationManager, RialtoApplicationSessionServer : [[#RialtoApplicationSessionManagement-NotRunning→Active Not Running to Active]]
ApplicationManager -> Application ** : Spawn(AppState::Running, listening_socket_name)
Application -> RialtoClient ** : load RialtoClient library library
Application -> RialtoClient : registerClient()
RialtoClient -> RialtoApplicationSessionServer: Connect(rialto_listening_socket)
note right
Connect is not an API call, it is establishing IPC channel with server
end note
RialtoClient
opt first registerClient call
RialtoClient --> ApplicationRialtoApplicationSessionServer:
Application registerClient()
RialtoApplicationSessionServer --> RialtoClient: setApplicationState(Running)status, AppState::Running
end
RialtoClient -> RialtoApplicationSessionServer: GetSharedMemory()
RialtoApplicationSessionServer --> RialtoClient: shm_fd
RialtoClient -> RialtoClient: Map shared memory
RialtoClient --> Application: status, AppState::Running
Application -// ApplicationManager: stateChanged(AppState::Running)
@enduml |
Switch Application from Inactive to Running State
| PlantUML Macro |
|---|
| format | SVG |
|---|
| title | Application state change: Inactive to Running |
|---|
|
@startuml
autonumber
participant ApplicationManager
participant RialtoApplicationSessionServer
participant Application
participant RialtoClient
ref over ApplicationManager, RialtoApplicationSessionServer : [[#RialtoApplicationSessionManagement-Inactive→Active Inactive to Active]]
ApplicationManager RialtoApplicationSessionServer -> Application RialtoClient: NotifyNewStatestateChanged(AppState::Running)
ApplicationRialtoClient -> RialtoClientApplication: setApplicationState stateChanged(AppState::Running)
RialtoClient -> RialtoApplicationSessionServer: GetSharedMemory()
RialtoApplicationSessionServer --> RialtoClient: shm_fd
RialtoClient -> RialtoClient: Map shared memory
RialtoClient --> Application: status
ApplicationManager -> Application : NotifyNewState(AppState::Running)
Application -// ApplicationManager: stateChanged(AppState::Running)
@enduml |
...
| PlantUML Macro |
|---|
| format | SVG |
|---|
| title | Application state change: Running to Inactive |
|---|
|
@startuml
autonumber
participant ApplicationManager
participant RialtoApplicationSessionServer
participant Application
participant RialtoClient
ApplicationManager
participant RialtoClient
ApplicationManager -> Application : NotifyNewState(AppState::Inactive)
Application --> ApplicationManager:
RialtoApplicationSessionServer -> RialtoClient: setApplicationStatestateChanged(AppState::Inactive)
RialtoClient -> RialtoClient : Free CDM & Player resources
RialtoClient -> RialtoClient: Unmap shared memory
RialtoClient --> Application: status
Application --> Application: -// ApplicationManager: stateChanged(AppState::Inactive)
ref over ApplicationManager, RialtoApplicationSessionServer : [[#RialtoApplicationSessionManagement-Active→Inactive Active to Inactive]]
@enduml
|
Stop Application from Inactive State
...
