done hw14 part 1
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1. As a user case scenario, I choose to require supporting the Amazon Alexa voice assistant to allow its users to alter smart device states by voice command. To achieve this functionality, I define new logical, process and deployment view to show how the Alexa API is integrated in the architecture.
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## Logical View
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```puml
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@startuml
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skinparam componentStyle rectangle
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!include <tupadr3/font-awesome/database>
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title Smarthut.sm Logical View
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interface " " as DIF
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interface " " as TF
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interface " " as SCF
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component "IoT Devices" as IOT {
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interface " " as HDF
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interface " " as HSF
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interface " " as ZDF
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interface " " as ZSF
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[HomeKit smart device] as HD <<user provided>>
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[HomeKit smart sensor] as HS <<user provided>>
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[MQTT smart device] as ZD <<user provided>>
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[MQTT smart sensor] as ZS <<user provided>>
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HD--HDF
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HS--HSF
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ZD--ZDF
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ZS--ZSF
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}
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component "Alexa" as ALEXA {
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interface " " as ALF
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[Alexa Skill Definition] as AS <<external>>
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[Alexa Smart Home Skill API] as AL <<external>>
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AS-(ALF
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ALF-AL
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}
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component "User Interface" as UIC {
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interface " " as WSCF
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[User Interface] as UI
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[WebSockets API (JavaScript)] <<external>> as WSC
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WSCF)--UI
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WSC--WSCF
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}
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component "Users and Devices" as DEV {
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interface " " as DIDBF
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interface " " as HAPF
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interface " " as ZIGF
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interface " " as WSSF
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[HAP-java] as HAP <<external>>
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[paho.mqtt.java] as ZIG <<external>>
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[Device Engine] as DI
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note left of DI: Already implemented using Spring Boot
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[javax.websocket API] as WSS <<external>>
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[User and Device DB <$database{scale=0.33}> (PostgreSQL)] <<external>> as DIDB
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HDF )-- HAP
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HSF )-- HAP
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ZDF )-- ZIG
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ZSF )-- ZIG
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DI--(WSSF
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WSSF--WSS
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HAP--HAPF
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ZIG--ZIGF
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HAPF )-- DI
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ZIGF )-- DI
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DIDBF-DIDB
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DI -( DIDBF
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}
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AL--(DIF
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component "Triggers and Automations" as TRIG {
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interface " " as TDBF
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[Trigger and Automation Engine] as T
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[Trigger and Automation DB <$database{scale=0.33}> (PostgreSQL)] <<external>> as TDB
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TDBF-TDB
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T -( TDBF
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}
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component "Scenes" as SCENE {
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interface " " as SCDBF
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[Scene Engine] as SC
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[Scene DB <$database{scale=0.33}> (PostgreSQL)] <<external>> as SCDB
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SCDBF-SCDB
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SC -( SCDBF
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}
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DI--DIF
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TF--T
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SCF--SC
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WSS <..> WSC: WebSocket protocol (RFC 6455)
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DI --( TF
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T --( SCF
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DIF )-- SC
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DIF )-- UI
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UI --( SCF
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UI --( TF
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skinparam monochrome true
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skinparam shadowing false
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skinparam defaultFontName Courier
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@enduml
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```
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## Process View
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Use case: a user alters manually the state of device 'D' via Alexa voice command,
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and the device updates accordingly. Device 'D' is not part of any defined trigger.
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```puml
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@startuml
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title Process View: UI updates state of device
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box "IoT Devices"
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participant "MQTT device 'D'" as ZD
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end box
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box "User Interface"
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participant "UI" as UI
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participant "WebSockets API (JS)" as WSC
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end box
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box "Alexa"
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participant "Alexa Skill Definition" as AS
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participant "Alexa Smart Home Skill API" as AL
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end box
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box "Users and Devices"
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participant "javax.websocket" as WSS
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participant "HAP-java" as HAP
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participant "paho.mqtt.java" as ZIG
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participant "Engine" as DI
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participant "DB" as DIDB
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end box
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box "Triggers and Automations"
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participant "Engine" as T
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participant "DB" as TDB
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end box
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box "Scenes"
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participant "Engine" as SC
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participant "DB" as SCDB
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end box
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AS -> AL: interprets "Turn on device D" command
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AL -> DI: HTTP 1.1 PUT /devices/{id}/state\n(update state)
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DI -> ZIG: client.publish(\n TOPIC,\n new MqttMessage(...)\n);\n(request state update)
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ZIG -> ZD: MQTT PUBLISH\n(state update request)
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ZD -> ZIG: MQTT PUBLISH\n(new state)
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ZIG -> DI: subscriber.subscribe(...) observer called \n(successful application)
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DI -> DIDB: JDBC transaction (UPDATE)\n(store new state)
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DI -> WSS: s.getBasicRemote().sendText(...)\n(send new device state)
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WSS <--> WSC: WebSocket protocol
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WSC -> UI: connection.onmessage called\n(new device state received, updates UI)
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DI -> T: report latest device state
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skinparam monochrome true
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skinparam shadowing false
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skinparam defaultFontName Courier
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@enduml
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```
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### Deployment View
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```puml
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@startuml
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title SmartHut Deployment View
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node "Users and Devices" {
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[Engine] as UW
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}
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node "Triggers and Automations" {
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[Engine] as TW
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}
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node "Scenes" {
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[Engine] as SW
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}
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database "Users and Devices Database" {
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[DB] as UDB
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UW - UDB: JDBC
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}
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database "Triggers and Automations Database" {
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[DB] as TDB
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TW -- TDB: JDBC
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}
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database "Scenes Database" {
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[DB] as SDB
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SW - SDB: JDBC
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}
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UW -- TW: HTTPS
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TW -- SW: HTTPS
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UW -- SW: HTTPS
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node "Device" {
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[Web Based User Interface] as UI
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}
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cloud "User owned smart devices" {
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[Homekit Smart Device] as HD
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[Homekit Smart Sensor] as HS
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[MQTT Smart Device] as MD
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[MQTT Smart Sensor] as MS
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}
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cloud "User Interface CDN" {
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[User Interface Web Server] as CDN
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}
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cloud "Alexa" {
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[Alexa Skill Definition] as AS
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[Alexa Smart Home Skill API] as AL
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}
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UW -- HD: Homekit protocol
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UW -- HS: Homekit protocol
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UW -- MD: MQTT
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UW -- MS: MQTT
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UI -- CDN: HTTPS
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UI -- UW: HTTPS
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UI -- TW: HTTPS
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UI -- SW: HTTPS
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AS -- AL: RPC (JavaScript)
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AL -- UW: HTTPS
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skinparam monochrome true
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skinparam shadowing false
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skinparam defaultFontName Courier
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@enduml
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```
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Reference in a new issue