Business Events

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Business Events

• By Dheeraj Bhushan
• Getrinate Inc.
• Example from ACCO Brands

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What are Business Events

• What Oracle manual says A business event is an
  occurrence in an internet or intranet application
  or program that might be significant to other
  objects in a system or to external agents.
• Example For instance, the creation of a purchase
  order is an example of a business event in a
  purchasing application.

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Examples

• Business
• Supply Chain
• Received an Order
• Prepare Order
• Schedule Shipper
• Ship an Order
• Healthcare
• New Patient
• Appointment request
• Charitable
• Received a Pledge

• Application
• Order Management
• Order is Entered
• Order is Booked
• Order is Reserved
• Shipping Execution
• Deliveries Created
• Trip is Assigned

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History

• SNMP protocol released in 1988
• Message Queues in Operating System
• Advent of MOMs (Message Oriented Middleware)
• Messaging standardization via JMS release with
  JDK 1.3.1 in 2000
• SNMP v3 released in 2004

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Oracle Business Events

• The Oracle Workflow Business Event System is an
  application service that leverages the Oracle
  Advanced Queuing (AQ) infrastructure to
  communicate business events between systems.
• The Business Event System consists of the Event
  Manager and workflow process event activities.

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Subscriptions for Business Events

• Events that trigger custom code
• Events that send information to Workflow
• Events that send information to other queues or
  systems

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Uses of Business Events

• System integration messaging hubs
• Distributed applications messaging
• Message-based system integration
• Business-event based workflow processes
• Non-invasive customization of packaged
  applications

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How to?

• Design your Business Event/s
• Define your event
• Example of Invoking and Consuming a Business
  Event

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Use Case Analysis

• Define the issue in problem domain
  (Business/Technical)
• Identify the technical transition point before
  and after the problem identification
• Solution the problem
• Identify data requirements
• Identify solution path
• Validate solution
• Register a business event for the problem
• Associate the business event with the solution

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Design Considerations for Business Events

• Do you see a problem that spans two or more
  systems,
• Usually interfaces across two applications?
• Do you see a problem that you need to resolve in
  a more generic fashion, i.e. reusable components?
• How to approach such problems?

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Design Events

• Define your event hierarchy
• Company Top level Company.Sub Company/
  Business/ SBU
• Company.Application.Module.Event Group.Event
• Example event following the above convention
• ACCO.OracleEBS.ONT.ShipSetLinesWorkflow.Invoke

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Defining a Business Event

• User Interface Use this for Initial creation
• Workflow Administrator Responsibility
• Developer Studio ? Business Events tab page
• Developer Studio ? Subscriptions link
• API based Use this to automate.
• WF_EVENTS_PKG
• GENERATE and RECEIVE
• WF_EVENT_SUBSCRIPTIONS_PKG
• GENERATE and RECEIVE

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Invoke and Consume Business Events

• The steps for this example are presented as
• Problem description
• Register the Business Event (1 2 )
• Register Event Subscription (1,2 3)
• Solution discussion of the New Workflow

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Example Problem Description

• We had created a customization on Order Line
  workflow to update Ship Method and Request Dates
  prior to Scheduling.
• However this workflow failed after the 11.5.10
  CU2 upgrade. The error indicated that lines part
  of a ship set can not have two different ship
  methods.
• As our update to lines is done for each line the
  existing solution would not be able to work
  around this restriction.

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Old Order Line Workflow Process
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Register Business Event 1
1. Login Role
2. Navigate to Developer Studio then switch to tab
3. Select Create Event Button
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Register Business Event 2
Finish
4. Specify Event Name and Display name
5. Specify Custom App name And Custom Schema Owner
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Register Event Subscription 1
Start
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Register Event Subscription 2
1. Add System Name
2. Add Event Name
3. Select Key
Next
4. Launch Workflow
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Register Event Subscription 3
Apply
5. Choose Workflow 6. Choose process
7. Specify Owner Name 8. Specify Custom Schema
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Solution Overview

• Order Lines workflow Queue data for a Ship Set
  Line Workflows consumer queue
• Last Line for the Ship Set on that Order invokes
  the Business Event
• Ship Set Line Workflow listens for this Event to
  start processing the queue
• After Ship Set Lines Workflow Completes. It sends
  continue activity signal to all Ship Set Lines

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New Order Line WorkflowProcess Invoke Event
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Ship Set Lines WorkflowConsume Event
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Whats Next..

• BPEL and BPMN are two pervasive standards that
  will change the future of currents events based
  processing.
• Events will be critical for internal routing and
  integration of applications.
• Although external integrations will depend mostly
  on SOA suite technologies.

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Business Events to BPEL

• Complete Business processes
• BPEL process are event with source, action
  destination, action response and error handling
  definition
• BPEL domains

• Process triggering event
• Events are state transition indicators
• Event Actions are based on subscription
• Event Groups

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References

• Oracle Workflow Developers Guide 2.6.3.5 (Part
  B12161-02)
• Message Oriented Middleware on Wikipedia at
  http//en.wikipedia.org/wiki/Message_Oriented_Midd
  leware
• Java Messaging Service API overview at
  http//java.sun.com/products/jms/overview.html
• JMS Tutorial on java.sun.com
• OASIS web site at www.oasis-open.org
• Wikipedia at http//en.wikipedia.org/wiki/BPEL