frenchkit 2017: server(less) swift
TRANSCRIPT
Server(less) Swiftwith Kitura and OpenWhisk
Chris Bailey@Chris__Bailey
FrenchKit 2017September 22nd
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(less) SwiftServer
3
SwiftServer
4
FullStack
0
17.5
35
52.5
70
Full
Stac
k
Back
end
Fron
tend
11.9
24.4
63.7
5
FullStack
0
17.5
35
52.5
70
Full
Stac
k
Back
end
Fron
tend
11.9
24.4
63.7
0
40
80
120
160
141.5
16.24.34
Fast
6
FullStack
0
17.5
35
52.5
70
Full
Stac
k
Back
end
Fron
tend
11.9
24.4
63.7
0
40
80
120
160
141.5
16.24.34
Fast
0
15
30
45
60
50.2
31.329.9
11.7
Efficient
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iOS APP
Hosted ServicesGATEWAY
PUBLIC NETWORK CLOUD NETWORK
SWAGGERDATA
PUSH ANALYTICS
DEVOPS AVAILABILITY MONITORINGSCALING
SOCIAL
COGNATIVE
AUTH
WEB APP
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import Kitura import SwiftyJSON
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import Kitura import SwiftyJSON
router.all("/*", middleware: BodyParser()) router.post(path, handler: handleCreate)
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import Kitura import SwiftyJSON
router.all("/*", middleware: BodyParser()) router.post(path, handler: handleCreate)
func handleCreate(request: RouterRequest, response: RouterResponse, next: @escaping () -> Void) {
}
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import Kitura import SwiftyJSON
router.all("/*", middleware: BodyParser()) router.post(path, handler: handleCreate)
func handleCreate(request: RouterRequest, response: RouterResponse, next: @escaping () -> Void) { guard case .json(let json)? = request.body else { response.status(.badRequest) response.send(json: JSON([ "error": "Request not JSON" ])) return next() }
}
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import Kitura import SwiftyJSON
router.all("/*", middleware: BodyParser()) router.post(path, handler: handleCreate)
func handleCreate(request: RouterRequest, response: RouterResponse, next: @escaping () -> Void) { guard case .json(let json)? = request.body else { response.status(.badRequest) response.send(json: JSON([ "error": "Request not JSON" ])) return next() } let name = json["name"].string let rating = json[“rating"].number // etc // etc
}
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import Kitura import SwiftyJSON
router.all("/*", middleware: BodyParser()) router.post(path, handler: handleCreate)
func handleCreate(request: RouterRequest, response: RouterResponse, next: @escaping () -> Void) { guard case .json(let json)? = request.body else { response.status(.badRequest) response.send(json: JSON([ "error": "Request not JSON" ])) return next() } let name = json["name"].string let rating = json[“rating"].number // etc // etc next() }
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15
Decreasing concern (and control) over stack implementation
Incr
easi
ng fo
cus
on b
usin
ess
logi
c
IaaS
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Decreasing concern (and control) over stack implementation
Incr
easi
ng fo
cus
on b
usin
ess
logi
c
IaaS
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Decreasing concern (and control) over stack implementation
Incr
easi
ng fo
cus
on b
usin
ess
logi
c
IaaS
CaaS
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Decreasing concern (and control) over stack implementation
Incr
easi
ng fo
cus
on b
usin
ess
logi
c
IaaS
CaaS
PaaS
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Decreasing concern (and control) over stack implementation
Incr
easi
ng fo
cus
on b
usin
ess
logi
c
IaaS
CaaS
PaaS
?
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Decreasing concern (and control) over stack implementation
Incr
easi
ng fo
cus
on b
usin
ess
logi
c
IaaS
CaaS
PaaS
? Serverless
Serverless
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Functions-as-a-Service
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PaaS FaaS
OpenWhisk
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PaaSWrite application centric business logic.
FaaSWrite event-driven business logic.
OpenWhisk
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PaaSWrite application centric business logic.
Treat compute resources as utilities.
FaaSWrite event-driven business logic.Treat compute resources as utilities.
OpenWhisk
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PaaSWrite application centric business logic.
Treat compute resources as utilities.
Provides scaling, resilience and availability
FaaSWrite event-driven business logic.Treat compute resources as utilities.
Provides scaling, resilience andavailability
OpenWhisk
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“If your PaaS can efficiently start instances in 20ms that run for half a second, then call it serverless.”
- Adrian Cockcroft
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28
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func main(args: [String:Any]) -> [String:Any] { // Action code // goes here return [ “result" : "value" ] }
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func main(args: [String:Any]) -> [String:Any] { // Action code // goes here return [ “result" : "value" ] }
Entry Point
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func main(args: [String:Any]) -> [String:Any] { // Action code // goes here return [ “result" : "value" ] }
Entry Point Event Parameters
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func main(args: [String:Any]) -> [String:Any] { // Action code // goes here return [ “result" : "value" ] }
Entry Point Event Parameters
Result
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func main(args: [String:Any]) -> [String:Any] {
}
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func main(args: [String:Any]) -> [String:Any] { if let name = args["name"] as? String {
} }
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func main(args: [String:Any]) -> [String:Any] { if let name = args["name"] as? String { return [ "greeting" : "Hello \(name)!" ]
} }
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func main(args: [String:Any]) -> [String:Any] { if let name = args["name"] as? String { return [ "greeting" : "Hello \(name)!" ] } else { return [ "greeting" : "Hello stranger!" ] } }
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$ git clone https://github.com/openwhisk/openwhisk.git
Get OpenWhisk
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$ git clone https://github.com/openwhisk/openwhisk.git
$ cd openwhisk/tools/vagrant
$ vagrant up
Get OpenWhisk
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$ git clone https://github.com/openwhisk/openwhisk.git
$ cd openwhisk/tools/vagrant
$ vagrant up
Get OpenWhisk
Start OpenWhisk (in a Linux VM)
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$ wsk action create hello main.swift
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$ wsk action create hello main.swift
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Create Action
$ wsk action create hello main.swift
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Create Action Called
$ wsk action create hello main.swift
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Create Action Called From
$ wsk action create hello main.swift ok: created action hello
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Create Action Called From
$ wsk action create hello main.swift ok: created action hello
$ wsk action list
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Create Action Called From
$ wsk action create hello main.swift ok: created action hello
$ wsk action list
actions hello private
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Create Action Called From
$ wsk action create hello main.swift ok: created action hello
$ wsk action list
actions hello private
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Create Action
Our Action
Called From
$ wsk action invoke --result hello --param name World
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$ wsk action invoke --result hello --param name World
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Invoke Action
$ wsk action invoke --result hello --param name World
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Invoke Action Called
$ wsk action invoke --result hello --param name World
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Invoke Action Called
With Parameters
$ wsk action invoke --result hello --param name World
{
“greeting" : “Hello World!”
}
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Invoke Action Called
With Parameters
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TTriggers• Database update • IoT sensor activation • GitHub hook • Slack notification • REST request
T
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T ATriggers• Database update • IoT sensor activation • GitHub hook • Slack notification • REST request
Actions• Your code • Single task • Any language • Docker binary • Returns JSON
AT
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T A RTriggers• Database update • IoT sensor activation • GitHub hook • Slack notification • REST request
Actions• Your code • Single task • Any language • Docker binary • Returns JSON
Rules• Link Triggers to
Actions • Create sequences • Many to many maps
become possible
ATR :=
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T A RTriggers• Database update • IoT sensor activation • GitHub hook • Slack notification • REST request
Actions• Your code • Single task • Any language • Docker binary • Returns JSON
Rules• Link Triggers to
Actions • Create sequences • Many to many maps
become possible
ATR A A1 A2 A3:= + +:=
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T A R PTriggers• Database update • IoT sensor activation • GitHub hook • Slack notification • REST request
Actions• Your code • Single task • Any language • Docker binary • Returns JSON
Rules• Link Triggers to
Actions • Create sequences • Many to many maps
become possible
Packages• Collection of triggers and actions
ATR A A1 A2 A3
AB A2 A1 A4TR
:=
:=
+
+
+
+
:=
:=
$ wsk api create /hello get hello —response-type json
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$ wsk api create /hello get hello —response-type json
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Create API
$ wsk api create /hello get hello —response-type json
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Create API
REST Route Method
$ wsk api create /hello get hello —response-type json
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Create API
REST Route Method From
Action
$ wsk api create /hello get hello —response-type json
ok: created API /hello GET for action /_/hello https://${APIHOST}:9001/api/21ef035/hello
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Create API
REST Route Method From
Action
$ wsk api create /hello get hello —response-type json
ok: created API /hello GET for action /_/hello https://${APIHOST}:9001/api/21ef035/hello
$ curl https://${APIHOST}:9001/api/21ef035/hello?name=World
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Create API
REST Route Method From
Action
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• Mobile client SDK for iOS and watchOS.
• Fire remote triggers and invoke remote actions.
• Swift 3, iOS9+ and watchOS 3.
• Install by using CocoaPods, Carthage, Swift Package Manager, or from the source directory.
https://github.com/apache/incubator-openwhisk-client-swift
var params = [String: String]() params["payload"] = "Hello"
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var params = [String: String]() params["payload"] = "Hello"
do { try whisk.invokeAction(name: "hello", parameters: params, hasResult: true, callback: {(reply, error) -> Void in
}) } catch { print("Error \(error)") }
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var params = [String: String]() params["payload"] = "Hello"
do { try whisk.invokeAction(name: "hello", parameters: params, hasResult: true, callback: {(reply, error) -> Void in if let error = error { print("Error invoking action \(error.localizedDescription)") } else { var result = reply["result"] print("Got result \(result)") } }) } catch { print("Error \(error)") }
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Weather Gods
Weather Gods
• Premium app from Meyume Ltd.
• Offers a rich interactive experience unlike other weather apps.
• Sources high quality weather data from multiple providers including The Weather Company.
• Provides weather notifications: • type (rain, snow etc.) • schedule (evening, morning, or live) • options (e.g. only notify about heavy
rain).
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3-minute alarm
Group scanner
Weather collector
Wind scanner
Rain scanner
Fog scanner
Alarm trigger
Alarm trigger
Alarm trigger
Send push
Send push
Send push
Push notification
service
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BluePic
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BluePic
• Sample app from IBM • iOS and Web front ends
• Provides photo sharing
• Adds image recognition and weather data to the photo
• Provides notifications to users • Social sharing • Updates to data
https://github.com/IBM/BluePic
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PUBLIC NETWORK CLOUD NETWORK
iOS APP
WEB APP
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PUBLIC NETWORK CLOUD NETWORK
iOS APP
WEB APP
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PUBLIC NETWORK CLOUD NETWORK
iOS APP
WEB APP
78
PUBLIC NETWORK CLOUD NETWORK
iOS APP
WEB APP
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PUBLIC NETWORK CLOUD NETWORK
iOS APP
WEB APP
80
PUBLIC NETWORK CLOUD NETWORK
iOS APP
WEB APP
81
PUBLIC NETWORK CLOUD NETWORK
iOS APP
WEB APP
82
PUBLIC NETWORK CLOUD NETWORK
iOS APP
WEB APP
83
Decreasing concern (and control) over stack implementation
Incr
easi
ng fo
cus
on b
usin
ess
logi
c
84
Decreasing concern (and control) over stack implementation
Incr
easi
ng fo
cus
on b
usin
ess
logi
c
Server
Serverless