ACMS Business Logic Wrapper

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ACMS Business Logic Wrapper

• Catherine Ward
• WW OpenVMS eBusiness Programs

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Technologies tailored to business/computing needs
of ACMS customers
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Customers
ACMS Applications
Employees
Departments
Suppliers
Distributed Computing
Branches
Headquarters
Partners
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Terms

• Business logic
• Wrapper
• Component
• Distributed

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Business logic

• Represents the investment your company has made
• Amounts to thousands or maybe millions of
  programmer hours in the programs, including
  algorithms and databases, that you depend on to
  run your business

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Wrapper

• Wrappering is a method for reusing business logic
  in a distributed environment by exposing existing
  routines and functions using industry-standard
  component interfaces.

• (,,

Existing Application
Wrapper
Standard Interfaces
aka, wrapping, extending, encapsulating,
componentizing)
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Components

• Components are a means of exposing business logic
  using industry-standard interfaces that can be
  reused across multiple platforms and accessed
  using a variety of Web and PC-based client
  applications.

JavaBeans
EJBs
CORBA
COM
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Distributed

• A flexible, scalable computing environment that
  leverages components and multiple-tier
  architecture to permit multiple access modes,
  application reuse, and platform integration.

Employees
Customers
Departments
Suppliers
Branches
Partners
Headquarters
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Distributed computing and your business
ACMS on OpenVMS
Distributed computing builds on what you have
today
ContinuousOperations Data Integrity Scalability U
ninterrupted Growth Management Capabilities
PCs and the Web
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Integration is challenging

• Significant Engineering Effort
• Significant engineering effort
• Scaling
• Threading
• Java, J2EE, and EJBs
• Data conversion and data marshaling
• C wrappers
• Transport and comm
• Distributed transactions
• to name just a few.

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Comprehensive solution

• Thats why OpenVMS Engineering has put together
  a comprehensive solution tailored to ACMS
  applications

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Wrappering technology and ACMS

• Preparing
• Removing I/O processing (DECforms Exchange steps
  or other I/O processing steps)
• Generating
• Generating the wrapper code to access your ACMS
  Tasks using the System Interface
• Deploying
• Deploying industry-standard Enterprise JavaBeans
  (EJBs) or simply JavaBeans to expose the System
  Interface methods.

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Original ACMS application
Terminal-Based DECforms
Employee Example
Add Form
Add Task
Get Task
Update Form
Put task
Sequential .DAT file
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Removing I/O processing
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What is generated?

• Middle Component
• Runs on OpenVMS Alpha, Microsoft Windows, Tru64
  UNIX.
• The middle component is an EJB (or JavaBeans or
  COM) server that also acts as a client to the
  server component to make calls to OpenVMS server
  routines.
• Server Component
• Runs on OpenVMS VAX or OpenVMS Alpha V6.2 through
  V7.3
• The server component is installed on the system
  running the ACMS application. It wraps the users
  application, and serve it up in a way that allows
  it to be remotely callable.

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Schematic of the demo

• Add Servlet

Main Menu
COBOL
ACMS
Add
Get
Add Servlet
List
Add Form
Legacy Data Store
Print Servlet
WebLogic Server
Local Data Store
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Servlet layer
Add Servlet
Employee List Class
Print Servlet
Local Data Store
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Web presentation layer
The static forms use the Post method to send
input to the Java servlets, which process the
data and package it up.
The List form is a table of employee data
dynamically generated by the Print Servlet.
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