INT-9:%20Implementing%20ESB%20Processes%20with%20OpenEdge

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INT-9 Implementing ESB Processes with OpenEdge
and Sonic
David Cleary
Principal Software Engineer
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Agenda
Developing Business Processes

• Technology Overview
• Developing a Business Process from Start to Finish

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Audience Expectations

• Understanding of tools and technologies used
• Familiarity of thought process in creating a
  business process
• Complete script of the demo shown

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Products Used

• OpenEdge 10.1B01
• OpenEdge Architect
• ProxyGen
• OpenEdge Adapter for Sonic ESB
• OpenEdge Adapter for SonicMQ
• Sonic Workbench 7.5
• SonicMQ
• Sonic ESB

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Sonic and the OpenEdge Adapter for Sonic ESB
Packaged Application
PartnerSystem
Enterprise Service Bus
ESBAdapter
OpenEdge AppServer
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Why Sonic ESB and the OpenEdge Application Server

• AppServer Web Service interface is not what you
  want
• Transformation
• Need to route message to different services based
  on context
• CBR
• Combination of the above
• Multi-step business process
• Advanced Web Services standards
• WS-Addressing
• WS-Security

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Communication Models
Packaged Application
PartnerSystem
WebServices
Rest
Enterprise Service Bus
ESBAdapter
AppServer
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Web Services
SOAP- based Web Services
Web Services Consumer
Web Services Provider
Sonic
Sonic
Java
Java
WSDL
OpenEdge
OpenEdge
Perl
.NET
Perl
.NET

• An application that can be accessed using SOAP
  over HTTP where the interface is described using
  WSDL
• Standards defined by the W3C

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REST Representational State Transfer
Rest- based Web Services
REST Consumer
REST Provider

• An application that can be accessed via the HTTP
  GET/POST/PUT/DELETE verbs
• Message content if any typically in the form of
  XML as defined by some XML Schema

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Designing Interfaces
Public Interface
Packaged Application
PartnerSystem
Public Interface
WebServices
Rest
Private Interface
Enterprise Service Bus
ESBAdapter
AppServer
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Designing Interfaces
Public Interfaces

• Web Services vs. REST
• Use SOAP when you can leverage tools
• Use REST for simplicity
• Conform to the Industry Recommendations
• Web Services Interoperability Organization
  (ws-i.org)
• SOAP Encoding deprecated use Literal
• Use Document instead of RPC for widest client
  support
• Learn WSDL
• Create WSDL to conform to interface you want
  make it as simple as possible its the contract

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Designing Interfaces
Private Interfaces

• Interface between Sonic and OpenEdge
• Service is one or more related operations
• Operations should perform a complete unit of work
  make coarse-grained for efficiency
• All OpenEdge services are Request-Reply and can
  return a fault
• RPC/Literal allows mapping of individual
  parameters can use Web Service Invocation
  Editor easier
• Document/Literal allows using transformation of
  entire message

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Agenda
Developing Business Processes

• Technology Overview
• Developing a Business Process from Start to Finish

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Company Lookup Business Process
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Configuring Sonic Workbench with OpenEdge

• Workbench manages two containers for development
• Dev.ESB_Core runs Sonic Services
• Dev.ESB_Test will run OpenEdge Services
• OpenEdge installed container not used for
  development
• Classpath and properties on Test container
  configured for OpenEdge

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Define the Public Interface

• Defined by an XML Schema
• Use an XML Namespace
• URL if schema can be retrieved at location
• URN if just a name
• Create named types for your interface
• Define Elements for your types
• Many benefits by creating a schema
• Automatic example files
• Eases WSDL creation

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Defining and Deploying OpenEdge Services with
ProxyGen

• New ESB tab in ProxyGen for 10.1B
• Generates WSM and WSDL files for Sonic
• Deploys them automatically to Sonic Domain
• Defines ESB Service
• Creates Endpoints not underlying Queues
• Optionally deploys service to defined ESB
  container
• Sets AppServer URL

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Calling OpenEdge Services with a Web Service
Invocation

• Easiest way to call an OpenEdge Service
• SOAP message transient data is what is
  important
• Scenario editor allows live testing of service
• Add invocation to process
• Use mapping tools to extract input parameters
• Many options on handling results
• Scenarios and tracking info help development

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Using Sonic Transformation Services

• Transformations change results into what you need
• Save results as example document
• Schema says what you want
• Sonic tools ease style-sheet creation

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Using Sonic Routing Services (CBR)

• Route messages based on content
• Supports message parts or headers
• Routing based on rules files or XPATH
• Rules files written in JavaScript
• No coding required for XPATH
• Routing like a CASE statement
• Can route to first true evaluation or all
• Includes default destination

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Calling External Web Services

• Same process as calling OpenEdge Services
• Design for unreliability
• Use sub-processes to abstract implementation
• Easier to create new sub-process if Web Service
  goes away
• Create Fault process to be flexible

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Exposing Business Process to Clients

• Process currently has REST interface
• JMS and ABL clients send messages to Entry
  Endpoint
• HTTP Direct Acceptor for browser-based AJAX
  clients
• Replies specified via JMSReplyTo
• Wrap process to expose as SOAP
• Automatic WSDL generation
• Wrap and unwrap steps

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Business Process Demo
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In Summary

• Design, do not generate, your public interface
• Use REST for JMS and AJAX
• Use SOAP for advanced clients (tools,
  WS-Security, etc)
• Follow WS-I recommendations
• Use Document-Literal for widest client support
• Use sub-processes liberally
• Design for unreliability

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For More Information, go to

• PSDN
• Designing and Deploying SOA Applications on Sonic
  ESB for the OpenEdge Developer
• PSDN Forum
• Education Courses
• OpenEdge Development with Sonic ESB
• Service Oriented Integration with Sonic ESB
• Using JMS in OpenEdge

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Relevant Exchange Sessions

• INT-12 Mastering ProDatasets and Native XML
  Datatypes with Sonic ESB
• SONIC-1 Whats New in Sonic 7.5
• INT-3 Realistic Service Oriented Architecture
  Approaches
• INT-7 Middleware Roadmap and Info Exchange

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Questions?
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Thank you foryour time
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