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Advancing Integration Competency and Excellence with the WSO2 Integration Platform

Advancing Integration Competency and Excellence with the WSO2 Integration Platform. Kasun Indasiri Software Architect, WSO2 Miyuru Wanninayaka Technical Lead, WSO2. Agenda. Fundamentals of WSO2 ESB Cloud Connectors RESTful Integration Cloud Connector – Scenarios

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Advancing Integration Competency and Excellence with the WSO2 Integration Platform

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  1. Advancing Integration Competency and Excellence with the WSO2 Integration Platform KasunIndasiri Software Architect, WSO2 MiyuruWanninayaka Technical Lead, WSO2

  2. Agenda • Fundamentals of WSO2 ESB • Cloud Connectors • RESTful Integration • Cloud Connector – Scenarios • RESTful Integration – PizzaShop Scenario • Discussion

  3. Software in Enterprise • Large enterprises have many software systems in their “line of business” • Enterprise Resource Planning systems (ERP) • Management Information Systems (MIS) • Decision Support Systems (DSS) • Data stores • Legacy systems • These systems are often independent and controls one or more related business activities • But they are all parts of a single business process

  4. Need for Enterprise Integration • Individual software applications cannot achieve much • Systems should be integrated to work together • Enables free data flow across the organization • Improves production and management efficiency • Application users can make better decisions

  5. Easier Said Than Done! • Integrating a multitude of complex software applications is no child's play • Systems are diverse • Different platforms • Different programming languages • Different protocols and messaging standards • Different QoS requirements • Not everyone adhere to standards

  6. Point-to-Point Connections?

  7. Point-to-Point Connections?

  8. Point-to-Point Connections?

  9. Point-to-Point Connections?

  10. Bus

  11. Bus

  12. What is an ESB? • A piece of software that resembles a data bus used in computers • Provides a uniform approach for connecting systems • Monitor and control routing of message exchange between services • Software applications communicate via the bus • The service bus acts as a carrier or a message broker • Replaces direct contact between applications – Reduces coupling http://en.wikipedia.org/wiki/Enterprise_service_bus

  13. WSO2 Enterprise Service Bus • A lightweight, high performance ESB • Configuration driven over coding • REST, SOAP and WS-* support • Domain specific protocol support (eg: SAP, FIX) • Extensible to support custom protocols / message formats • Cloud enabled • Supports all EIP patterns http://www.eaipatterns.com

  14. Key features

  15. Routing • Simple proxy • Header-based Routing • Content-based Routing • XPath/Property/Regular Expression • Rules • If/Then/Else • Router mediator for complex routing

  16. Traffic Filtering • Xpath and regex based filtering • Script based filtering • Schema based filtering and validation <id>foo</id> <id>bar</id> <id>foo</id> <id>bar</id>

  17. Service Orchestration • Service chaining • Split/Aggregate/ • Clone/Merge • Parallel/Serial execution • If/Then/Else

  18. Transformation • XSLT • Payload Factory • Smooks • XQuery

  19. Protocol & Message Format Switching • Message Formats • SOAP, REST, JSON, Binary • Protocols • HTTP(S), JMS, VFS(File), TCP, SAP, FIX, HL7, SMTP

  20. Business/Cloud Connectors Connectors

  21. Load Balancing

  22. QoS : Security, Throttling, Caching • WS-Security / REST Security • Throttling • Concurrency • Rate • Caching • Local • Replicated • Suitable for idempotent operations

  23. REST Capabilities • Expose any service as RESTful APIs • URL Mapping • URL Templates REST http://www.infoq.com/articles/webber-rest-workflow http://wso2.org/library/articles/2012/09/get-cup-coffee-wso2-way/

  24. Store and Forward • Store incoming request in message store • In memory, JMS queue, Database • Forward to backend using message processor • Guaranteed delivery Message Store

  25. WSo2 ESB Nuts and bolts

  26. WSO2 ESB – Messaging Architecture

  27. Runtime

  28. Configuration Data Mediator Input Message Output Message

  29. Sequences • A sequential arrangement of mediators – A mediator chain • When a message is handed to a sequence it is given to the first mediator of the chain - The outcome of that will be handed to the second mediator of the chain and so on… • The messages are sent through the chain while mediators perform various actions on it along the way • Pipelining

  30. More on Sequences… Consider the example sequence shown above Messages are first logged by the log mediator The property mediator sets a property on the messages Then they are sent to a specified endpoint by the send mediator It is a simple log-and-forward message flow

  31. Endpoints • Defines an endpoint reference (EPR) to which messages can be sent/forwarded from the ESB • The send mediator takes an endpoint as an argument • Various operational constraints can be enforced on an endpoint • Timeout duration • Message format (POX, SOAP 1.1, SOAP 1.2) • QoS expectations can be set on an endpoint • WS-Security

  32. Proxy Services / API Acts like a virtual service that can receive requests from clients Received client requests are processed and routed to a specified endpoint (usually to an actual service – backend service) Responses coming back from the backend service are further processed and forwarded to the clients Resembles traditional HTTP proxy servers

  33. Proxy Service – Abstract View

  34. Templates • With complex business requirements, ESB config can grow bigger.. • Need a way to reuse the configuration • WSO2 ESB 4.0 introduces – Templates • An analogy… classes vs instances

  35. Templates • Sequence Templates <template xmlns="http://ws.apache.org/ns/synapse" name="xslt_func"> <parameter name="xslt_key"/> <sequence> <log level="full"> <property name="BEFORE_TRANSFORM" value="true"/> </log> <xslt key="{$func:xslt_key}"/> <log level="full"> <property name="AFTER_TRANSFORM" value="true"/> </log> </sequence> </template>

  36. Templates • Call Template Mediator – Invoking a Template <inSequence> <call-template target="xslt_func"> <with-param name="xslt_key" value="xslt-key-req"/> </call-template> <send> <endpoint> <address uri="http://localhost:9000/Foo"/> </endpoint> </send> </inSequence>

  37. WSO2 ESB Cloud Connectors

  38. WSO2 ESB Cloud Connectors • Cloud to Cloud

  39. WSO2 ESB Cloud Connectors • Cloud to Cloud

  40. WSO2 ESB Cloud Connectors • Cloud to Enterprise

  41. Cloud Connector Architecture • Objectives • Connect with any cloud API • Supporting diverse APIs (REST, SOAP, SDKs) • Dynamic configuration (No predefined configuration language) • Development methodology (config, java code, javascript, pojo) • Reduce development time(100+ connectors) • Dynamic Tooling with DevStudio • Performance

  42. Dynamic Synapse Configuration based on Templates • WSO2 ESB config language is predefined • Mediator Factories and Serializers • Eg: Property Mediator Serializer/Factory • So, dynamic synapse config language is not possible? • Custom Mediators/Mediator per each connector? • Won’t scale and it will be tedious task to write a connector • A new approach… • Inspired from Templates and Mediation Library

  43. Structure of a Cloud Connector • Connector Structure • A connector can have • Synapse config as templates • Custom Mediators • External Libararies (eg: twitter4j) • Java Script (or any other scripting lang.) • Connector Deployer • Loading required libraries

  44. Structure of a Cloud Connector Templates External Libs Connector custom code

  45. New Secure Vault • No hardcoded secrets or passwords in the ESB Config • wso2:vault-lookup <twitter.config> <consumerSecret>xx</consumerSecret> <accessTokenSecret>{wso2:vault-lookup('my_secret')}</accessTokenSecret> <accessToken>{wso2:vault-lookup('my_token')}</accessToken> <consumerKey>{wso2:vault-lookup('my_key')}</consumerKey> </twitter.config>

  46. Cloud Connectors – Use Case (I) • Salesforce + Twilio – Lead Generation

  47. Cloud Connectors – Use Case (II) • Salesforce + Google Spread Sheet – Opportunity Management

  48. Cloud Connectors – Use Case (III) • Salesforce + JIRA + Twilio – Account Management

  49. Cloud Connectors – Use Case (IV) • Twitter + Salesforce – Lead Monitor

  50. Advanced RESTful Integration • HTTP Endpoint <endpoint xmlns="http://ws.apache.org/ns/synapse" name=“PizzaShopJaxRS"> <http uri-template= "http://localhost:8080/{uri.var.servicepath}/restapi/{uri.var.servicename}/menu?category={uri.var.category}&amp;type={query.param.type}" method="GET"> </http> </endpoint>

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