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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
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:
@enduml |
...
| PlantUML Macro |
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@startuml
autonumber
participant RialtoServerManager
RialtoServerManager -> RialtoServerManager: Generate socketpair for Rialto Application Session Server to Server Manager communication
RialtoServerManager -> RialtoApplicationSessionServer **: Spawn(server_manager_socket)
note left
Spawn preloaded Application
Session Servers to speed up app launch time.
end note
RialtoServerManager -> RialtoServerManager: 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
RialtoApplicationSessionServer -// RialtoServerManager: -> stateChanged(AppState::Error)
RialtoServerManagerRialtoServerManager: -> RialtoServerManager: Cancel READY timer
RialtoApplicationSessionServer -> RialtoApplicationSessionServer: Unbind/free session management socket Cancel READY timer(if created)
RialtoApplicationSessionServer -> RialtoApplicationSessionServer !!: Exit process
else READY timer expired
RialtoServerManager -> RialtoServerManager: Kill spawned Rialto Application Session Server process
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
ApplicationManager -> RialtoServerManager: initiateApplication(application_id, AppState::Inactive, app_config)
note
alt right: app_config allows app manager to specify the socket name to use for Rialto client/server session management and the socket name for communication with a display server
opt session_management_socket_name not specified in app_config
RialtoServerManager -> RialtoServerManager:There are no preloaded servers
RialtoServerManager -> RialtoServerManager: Generate socketpair for Rialto Application Session Server to Server Manager communication
RialtoServerManager -> RialtoApplicationSessionServer Generate unique session_management_socket_name for Rialto Client to Rialto Application Session Server communication
end
alt There are no preloaded servers
RialtoServerManager**: Spawn(server_manager_socket)
RialtoServerManager -> RialtoServerManager: Start [startup] second READY timer
RialtoApplicationSessionServer -> RialtoServerManagerRialtoApplicationSessionServer: Set current_state = Uninitialised
alt RialtoApplicationSessionServer started successfully
RialtoApplicationSessionServer -// RialtoServerManager: Generate socketpair for Rialto Application Session Server to Server Manager communication stateChanged(AppState::Uninitialised)
RialtoServerManager -> RialtoApplicationSessionServer **: Spawn(server_manager_socket)
RialtoServerManager RialtoServerManager: -> RialtoServerManager: Start [startup] second Cancel READY timer
RialtoServerManager -->// ApplicationManager: OK/ERROR
RialtoApplicationSessionServer -> RialtoApplicationSessionServer: Set current_state = Uninitialised
alt RialtoApplicationSessionServer started successfully
stateChanged(application_id, AppState::Uninitialised)
ref over ApplicationManager, RialtoApplicationSessionServer : [[#RialtoApplicationSessionManagement-Unitialized→Inactive Unitialized→Inactive]]
else Session Server initialisation failed
RialtoApplicationSessionServer -> RialtoApplicationSessionServer: Unbind/free session management socket (if created)
RialtoApplicationSessionServer -// RialtoServerManager: stateChanged(AppState::UninitialisedError)
RialtoServerManager -> RialtoServerManager: Cancel READY timer
RialtoApplicationSessionServer -> RialtoApplicationSessionServer !!: Exit process
RialtoServerManager -// ApplicationManager: stateChanged(application_id, AppState::UninitialisedError)
ref over ApplicationManager, RialtoApplicationSessionServer : [[#RialtoApplicationSessionManagement-Unitialized→Inactive Unitialized→Inactive]]
else State transition failed
RialtoApplicationSessionServerelse READY timer expired
RialtoServerManager -> RialtoApplicationSessionServerRialtoServerManager: Unbind/free session management socket (if created)
RialtoApplicationSessionServer -// RialtoServerManager: Kill spawned Rialto Application Session stateChanged(AppState::Error)Server process
RialtoServerManager -// ApplicationManager: stateChanged(application_id, AppState::Error)
RialtoApplicationSessionServer -> RialtoApplicationSessionServer !!: Exit process
end
else SessionThere Serverare initialisationpreloaded failedservers
RialtoApplicationSessionServernote ->over ApplicationManager, RialtoApplicationSessionServer: Pick 1st Unbind/free sessionpreloaded managementserver socket (if created)
RialtoApplicationSessionServer -// RialtoServerManager: stateChanged(AppState::Error)it's already in unitialized state)
ref over ApplicationManager, RialtoApplicationSessionServer : [[#RialtoApplicationSessionManagement-Unitialized→Inactive Unitialized→Inactive]]
RialtoServerManager --> RialtoServerManagerApplicationManager: Cancel READY timer
RialtoApplicationSessionServer -> RialtoApplicationSessionServer !!: Exit process OK/ERROR
end
@enduml |
Unitialized→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
opt session_management_socket_name not specified in app_config
RialtoServerManager -//> ApplicationManagerRialtoServerManager: stateChanged(application_id, AppState::Error)
else READY timer expired
RialtoServerManager -> RialtoServerManager: Kill spawned Rialto Application Session Server process
RialtoServerManager Generate unique session_management_socket_name for Rialto Client to Rialto Application Session Server communication
end
note right
"app_config allows app manager to specify the socket name
to use for Rialto client/server session management
and the socket name for communication with a display server"
end note
RialtoServerManager -// ApplicationManager: -> RialtoApplicationSessionServer: stateChanged(application_idSetConfiguration(session_management_socket_name, AppState::ErrorInactive, resources, log_level, display_name)
end
else There are preloaded servers
ref over ApplicationManager, RialtoApplicationSessionServer : [[#RialtoApplicationSessionManagement-Unitialized→Inactive Unitialized→Inactive]]
RialtoServerManager --> ApplicationManager: OK/ERROR
end
@enduml |
Unitialized→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
RialtoServerManager -> RialtoApplicationSessionServer: SetConfiguration(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, AppState::Inactive, resources, log_level,
opt display_name) defined
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 -// 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: StateChanged(application_id, AppState::Inactive)
ApplicationManager -> RialtoServerManager: stateChangedgetAppConnectionInfo(AppState::Inactive)
RialtoServerManager -//-> ApplicationManager: StateChanged(application_id, AppState::Inactive)
ApplicationManager session_management_socket_name
else State transition failed
RialtoApplicationSessionServer -> RialtoApplicationSessionServer: Unbind/free session management socket (if created)
RialtoApplicationSessionServer ->// RialtoServerManager: getAppConnectionInfostateChanged(AppState::Error)
RialtoServerManager -->// ApplicationManager: session_management_socket_name
else State transition failed
stateChanged(application_id, AppState::Error)
RialtoApplicationSessionServer -> RialtoApplicationSessionServer !!: Exit process
end
opt Server Unbind/freepreloading session management socket (if created)
RialtoApplicationSessionServer -// RialtoServerManager: stateChanged(AppState::Error)
RialtoServerManager -// ApplicationManager: stateChanged(application_id, AppState::Error)
RialtoApplicationSessionServer -> RialtoApplicationSessionServer !!: Exit process
end
opt Server preloading is active
ref over ApplicationManager, RialtoApplicationSessionServer : [[#RialtoApplicationSessionManagement-NotRunning→Unitialized(serverpreloading) Not Running→Unitialized (server preloading)]]
end
@endumlis active
note over ApplicationManager, RialtoApplicationSessionServer: Preload RialtoApplicationSessionServer in place of 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 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
...
