INTEGRATION SUMMIT 2019 The Reconstitution of Middleware with APIs Story of a Middleware Developer Asanka Abeysinghe Deputy CTO & VP, Architecture - CTO Office WSO2, Inc 

February 1997 

First day at work picture credit: https://www.richard-banks.org 

First weeke at work ISAM DCom INPUT-OUTPUT SECTION. FILE-CONTROL. SELECT file-name ASSIGN TO dd-name ORGANIZATION IS INDEXED ACCESS MODE IS SEQUENTIAL RECORD KEY IS rec-key1 ALTERNATE RECORD KEY IS rec-key2 

March 1997 

picture credit: http://www.levisstadium.com/getting-here/ 

picture credit: https://www.ronniestewartracing.com/events/2016/4/2/levi-stadium-supercross-race 

picture credit: https://www.ninersnation.com 

Platform to perform Connecting an experience Colin Kaepernick Eli Tomac Chris Martin 

Middleware is computer software that provides services to software applications beyond those available from the operating system. It can be described as "software glue”. Middleware makes it easier for software developers to implement communication and input/output, so they can focus on the specific purpose of their application. 

Type of Middleware Message Oriented Object Oriented Remote Procedure Call Database Transaction Portals Embedded Content-centric 

Same power in different forms picture credit: https://www.thetimes.co.uk/article/asterix-exhibition-the-indomitable-gaul-who-restored-frances-postwar-pride-wpfcfqv2s 

Fall 2008 

Modular Middleware 

May 2019 

2019 1997 2003 Architect 2012 VP Solutions Architecture 2001 2008 Director Solutions Architecture Deputy CTO Open Source Distributed Computing Programmer COBOL OLE, OLE2 COM, COM+ DCOM CORBA Java Developer J2EE MMS 286-DX4 Eventing FIX HL7 Committer CONNECT-health Global architecture team 500+ customers Champions program Chief Architect 2005 QSP AR Trusted advocate Game hacker C++ programmer Age-16 Hedge fund tools Ref. Architecture Ref. Methodology Evangelize 2018 Middleware Developer 

In the long run Middleware is disappearing - in to code (simpler constructs, more power) - in to infrastructure (scaling, management, observability) 

People 

Full Stack Developer 

Connected roles Architecture Development Deployment Architect Developer DevOps 

Process 

Step 1 Step 1 Step 1 Step 2 Step 2 Step 2 … … … Step n Step p Step q SGMM SOA Governance Planning Assessment SOA Governance Capabilities Heat Map SOA Governance Transition Plan SOA Governance Assets Techniques, Checklist, Guidance, Examples Governance Process Models Complex processes inturupt flow 

App Logic . . . Scaling HA Resilience Observability Scaling HA Resilience Observability HA Resilience Observability Compute Network Storage Ops Infrastructure Centralized
 Dev Org Middleware 
 & Integration
 CoE Teams Ops
 Team HA Resilience Observability Scaling INTEGRATION HA Resilience Observability Scaling MESSAGING HA Resilience Observability Scaling DATA HA Resilience Observability Scaling SECURITY App Logic App Logic App 1 App 2 App (n) Fast Waterfall “Wagile” 

Agile - Developer Flow 

Agile Flow for Development Teams 

picture credit: https://www.formula1.com/en/teams/Red-Bull.html Self-Organized teams 

Technology 

The wrong technology stack interrupts flow 

COMPOSABLE ENTERPRISE WITH CLOUD NATIVE Autonomous releases, CI/CD, self-organization, change-control authority App (n) App Microservice INTEGRATION MESSAGING DATA SECURITY App 1 INTEGRATION MESSAGING DATA SECURITY Microservices App 2 App Miniservices INTEGRATION MESSAGING DATA SECURITY APIs Self-
 Organizing
 Dev Teams . . . Ops
 Team Event-Based Hybrid Integration Platform Scaling | HA | Resilience | Observability Orchestration & High-Performance Data Store Ops Infrastructure Architecture Blocks Enable the Composable Enterprise App Logic . . . Scaling HA Resilience Observability Scaling HA Resilience Observability HA Resilience Observability Compute Network Storage Ops Infrastructure Centralized
 Dev Org Middleware 
 & Integration
 CoE Teams Ops
 Team LAYERED ENTERPRISE WITH CENTER OF EXCELLENCE Coordinated releases, organizational rigor, centralized change control HA Resilience Observability Scaling INTEGRATION HA Resilience Observability Scaling MESSAGING HA Resilience Observability Scaling DATA HA Resilience Observability Scaling SECURITY App Logic App Logic App 1 App 2 App (n) DevOps 

Control Plane: - Signaling of the network - Makes decisions about the traffic flow Data Plane: - Forwards traffic between hops - Takes data packets picture credit: https://www.flickr.com/photos/teflon/ Management Plane: - Configure - Observeabiltty, Monitor 

Intra and Inter communication Architecture Blocks Architecture Blocks 

Intra and Inter communication Local-mesh Global-mesh Architecture Blocks Architecture Blocks 

API-centric Architecture Architecture Block Architecture Block 

API-centric Architecture Pull APIs - RESTful HTTP, gRPC Push APIs - Events JMS, AMQP, SMTP - Streams Kafka, MQTT Architecture Block Architecture Block 

In the long run Middleware is disappearing - in to code - in to infrastructure 

Pragmatic Approach Ballerina: middleware embedded into the code Cellery: middleware embedded into the infrastructure Cell-based Architecture: decentralized architecture Agile Methodology: increase the flow efficiency 

A cloud-native programming language for microservices and APIs - A compiled, transactional, statically and strongly typed programming language with textual and graphical syntaxes. - Incorporates fundamental concepts of distributed system integration - Offers a type safe, concurrent environment to implement microservices with distributed transactions, reliable messaging, stream processing, and workflows - Compiles into container images for deployment on Kubernetes and Docker https://ballerina.io/ 

Ballerina - code and visual syntax in sync 

https://cellery.io/ Build, run, and manage code-first composites on Kubernetes 

Cellery - simple composition and graphical view 

picture credit: https://www.medicalnewstoday.com/ https://github.com/wso2/reference-architecture Cell-based Architecture 

Cell: Units of Enterprise Architecture A cell is a collection of components, grouped from design and implementation into deployment. A cell is independently deployable, manageable, and observable. 

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Cell Types Cell Type Components Logic Microservices, Functions, MicroGateways, lightweight storages Integration MicroESB or other integration microservices, lightweight storage and/or cache Legacy Existing systems, legacy services External SaaS and partner systems Data RDBMS, NoSQL, File, Message Broker* Identity IDP, user stores Channel Web Apps, IoT, mobile apps 

picture credit: https://www.flickr.com/photos/vasile23/ Reference Methodology https://github.com/wso2/reference-methodology 

People, Process & Technology ++ 

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Cells and Podular Organizations 

In the long run Middleware is disappearing - in to code - in to infrastructure 

picture credit: https://www.flickr.com/photos/infomatique/ APIs the glue of (µ) components deployed in a decentralized architecture 

picture credit: https://www.flickr.com/photos/infomatique/ Invitation to consume and contribute https://ballerina.io https://cellery.io https://github.com/wso2/reference-architecture https://github.com/wso2/reference-methodology 

INTEGRATION SUMMIT 2019 THANK YOU wso2.com @asankama