![func main() {
app := flogo.NewApp()
trg := app.NewTrigger(&rest.RestTrigger{}, map[string]interface{}{"port": 8080})
trg.NewFuncHandler(map[string]interface{}{"method": "GET", "path": "/blah"},
RunActivities)
e, err := flogo.NewEngine(app)
if err != nil {
logger.Error(err)
return
}
engine.RunEngine(e)
}
func RunActivities(ctx context.Context, inputs map[string]*data.Attribute)
(map[string]*data.Attribute, error) {
in := map[string]interface{}{"message": "test"}
_, err := flogo.EvalActivity(&log.LogActivity{}, in)
if err != nil {
return nil, err
}
return nil, nil
}
Use triggers & function
handlers
Call activities
So We Also Have a Go API!](https://image.slidesharecdn.com/flogo-buildingserverlessappswithgosam-180802152735/85/Building-serverless-apps-with-Go-SAM-33-320.jpg)
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Building serverless apps with Go & SAM
- 1. Building Serverless Apps with Go & SAM ( @LeonStigter)
- 2. Confidentiality The following information is confidential information of TIBCO Software Inc. Use, duplication, transmission, or republication for any purpose without the prior written consent of TIBCO is expressly prohibited.
- 3. Disclaimer This document (including, without limitation, any product roadmap or statement of direction data) illustrates the planned testing, release and availability dates for TIBCO products and services. This document is provided for informational purposes only and its contents are subject to change without notice. TIBCO makes no warranties, express or implied, in or relating to this document or any information in it, including, without limitation, that this document, or any information in it, is error-free or meets any conditions of merchantability or fitness for a particular purpose. This document may not be reproduced or transmitted in any form or by any means without our prior written permission. The material provided is for informational purposes only, and should not be relied on in making a purchasing decision. The information is not a commitment, promise or legal obligation to deliver any material, code, or functionality. The development, release, and timing of any features or functionality described for our products remains at our sole discretion. During the course of this presentation TIBCO or its representatives may make forward-looking statements regarding future events, TIBCO’s future results or our future financial performance. These statements are based on management’s current expectations. Although we believe that the expectations reflected in the forward-looking statements contained in this presentation are reasonable, these expectations or any of the forward-looking statements could prove to be incorrect and actual results or financial performance could differ materially from those stated herein. TIBCO does not undertake to update any forward-looking statement that may be made from time to time or on its behalf.
- 4. •Developer Advocate at TIBCO •Passionate about Open Source, Cloud, Containers and Serverless •I love cheesecake, dad jokes, and APIs Leon Stigter, Developer Advocate ( @LeonStigter) Who Am I?
- 5. Once Upon A Time...
- 6. This Was/Is Your Data Center
- 7. …Transforming data into action… To spot and seize opportunities from the ever increasing volumes of data and devices …Operating with more speed and agility… To meet stakeholder demands for delivering rapid innovation and differentiation …Empowering more users… To become self-sufficient at helping the business with digital transformation efforts Why Do We Build Apps?
- 8. ArchitectsIT ManagersIntegratorsDevelopers Data Scientists Analysts Analytics Leaders Business Leaders Your Apps Matter!
- 9. ESB …From building and connecting monolithic applications to each other… App App App …To also becoming the infrastructure on which modern applications are built, with API and event-driven microservices patterns, to support digital transformation needs Technically the strategy must “integrate integration” and blur the lines between development and integration -Randy Heffner, Forrester Research Service Service Service API EVENT API EVENT API API “App” Function Function The Way We Build Apps Is Changing
- 10. Source https://info.leanix.net/hubfs/leanIX_Microservices-Study.pdf Challenges To Adopt New Tech
- 11. “...among those having implemented REST APIs, only 25% say that all or nearly all of them are designed as entirely CRUD APIs, which shows that many organizations feel the need to go against the religion.” “...among development managers with internal APIs, 23% said they have important use cases, where one call to an API must update multiple applications.” Microservices enable use cases beyond simple point-to-point CRUD “Among development managers who said that changing their business model was likely to be a critical or high business priority, 62% already have microservices or plan to have them by early 2018.” Source: Forrester Research Microservices and External APIs Underpin Digital Business (Oct 17, 2017)
- 12. “Dynamic Cloud” Deployment Growth • More enterprise strategic workloads are now run in the cloud than on-premise • The highest workload % is using “Dynamic Cloud”; FaaS and Serverless technology Source: The New Stack, 2017 Survey
- 13. Likely This Is Your Datacenter…
- 14. So… Let’s recap for a second… • If you’re building apps… • And everyone is building apps with you… • And we’re breaking down monoliths… • And we’re moving to the cloud… • And change is really, really hard…
- 15. In That Case There Is Only One Solution… NEVER MANAGE SERVERS
- 16. Let’s Talk Serverless… Scales with usage Never pay for idle No servers to provision Or manage Availability and Fault-tolerance built in
- 17. Reuse some standard building blocks Amazon API Gateway Amazon SQS Amazon DynamoDB Amazon Kinesis Amazon S3 Amazon SNS Let’s Talk Serverless…
- 18. Project Flogo Open Source Stack for Event-Driven Apps Build smarter with Edge Machine Learning 10-50x lighter than Java, .NET or Node.js Visually model & test flows as functions Event-driven design with native support for AWS Lambda 100% Open Source with zero lock-in What Is Project Flogo?
- 19. If your background is in or you prefer to develop your apps using zero-coding environments. Flogo Web UI is available via Docker Hub or Flogo.io. It contains everything required to get started in seconds! Who Is Project Flogo Meant For?
- 20. Getting started with the CLI couldn't be any easier: go get -u github.com/TIBCOSoftware/f logo-cli/... Or go get -u github.com/TIBCOSoftware/f logo-lib/... Who Is Project Flogo Meant For?
- 21. Java, NodeJS are great, but too large for resource constrained environments Why Golang for Project Flogo: ➢ Complies natively and runs natively. ➢ Only the required dependencies are built into the application. ➢ Static linking enables zero OS dependencies. App Framework (OSGi) VM (JVM) Operating System Hardware App Framework (Node.js) VM (V8) Operating System Hardware App Operating System Hardware But Why Go?
- 22. The Basics of Project Flogo ➢ At its core, flogo is an event-driven framework ➢ The intent is for the event sources (Triggers) and Actions to be pluggable contributions ➢ The Web-UI uses the FlowAction
- 23. The Basics of Project Flogo Image from https://www.youtube.com/watch?v=r7lMGPM3u9E
- 24. Event Stream Kafka Triggers: Kafka, REST, MQTT, etc… Triggers Trigger Listens to events for a particular source (ex. HTTP on port 8080, a MQTT server) Handler ➢ Associate events with actions ➢ Is configured to dispatch based on settings (ex. HTTP: Method and path, MQTT : topic)
- 25. ➢ Basically an “action” to perform on receiving the event ➢ Can be simple go code which implements the Action interface ➢ Contributed Actions, such as the FlowAction used by our UI Event Stream Kafka Triggers: Kafka, REST, MQTT, etc… Flow Golang Package Actions Actions
- 26. Event Stream Kafka Triggers: Kafka, REST, MQTT, etc… Action (Flow) Activity Activities Activity ➢ Similar to Action, but intended to be closer to a simple function call ➢ Can be used as a way to compose an Action like flow does ➢ Activities are connected via ‘links’
- 28. Low friction web-native UX ➢ Express app logic using rich flows, not just data or request pipelines ➢ Inline data transformations ➢ Built-in web-based debugger ➢ Build for target platform directly from UI ➢ Available on Docker Hub or Flogo.io How To Build an App? We Have a UI
- 29. ➢ Wraps all common commands for building Flogo applications ➢ Wrapper around go `dep` and `go` cli ➢ Parses DSL for ➢ dependencies ➢ Importing req packages ➢ main.go ➢ embedding app How To Build an App? We Have a CLI
- 31. I’m a developer, I just want to write code...
- 32. No UI Shouldn’t require a UI or JSON API driven Must provide a simple API for app composition and execution Reuse concepts Must allow users to use existing triggers, actions and activities Mix with Go Should be easy to invoke custom code in response to a event from a trigger Developer Experience: Flogo-as-a-Lib
- 33. func main() { app := flogo.NewApp() trg := app.NewTrigger(&rest.RestTrigger{}, map[string]interface{}{"port": 8080}) trg.NewFuncHandler(map[string]interface{}{"method": "GET", "path": "/blah"}, RunActivities) e, err := flogo.NewEngine(app) if err != nil { logger.Error(err) return } engine.RunEngine(e) } func RunActivities(ctx context.Context, inputs map[string]*data.Attribute) (map[string]*data.Attribute, error) { in := map[string]interface{}{"message": "test"} _, err := flogo.EvalActivity(&log.LogActivity{}, in) if err != nil { return nil, err } return nil, nil } Use triggers & function handlers Call activities So We Also Have a Go API!
- 35. Q & A
- 36. github.com/TIBCOSoftware/flogo $ docker run -it -p 3303:3303 flogo/flogo-docker eula-accept Building via the CLI $ go get github.com/TIBCOSoftware/flogo-cli Getting Started with Project Flogo