concurrent concepts

8/3/2019 Concurrent Concepts

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Objectives .

Overview of Concurrent Processing

Defining Concurrent Programs

CONCURRENT PROCESSING

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To Understand .

Coding Oracle Tools Concurrent Programs


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Major Features

Online Requests

Over view Of Concurrent Processing

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Automatic Scheduling

Concurrent Processing Options

Online Request Review

Concurrent Managers

Simultaneous Queuing


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Concurrent processing simultaneously executes

programs running in the background with online

operations

Purpose of concurrent processing:

Take advantage of multitasking,parallel

processing and distributed processing

Give system administration flexibility to set up

concurrent processing to fit the needs of their

site and users

Concurrent Processing Overview


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Benefits of concurrent processing:

Consistent response time

Use all the capacity of your hardware by

executing many process at once

Control the number of processes that run on each

node

On-line file review

Portable interface to your concurrent program

Concurrent Processing Overview


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Definitions

Concurrent Program

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Concurrent Program Executable

Concurrent Request

Concurrent Process

Concurrent Manager

Concurrent Queue


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Concurrent Program

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An instance of an execution file,along with parameter

definitions and incompatibilities.Several concurrent programsmay use the same execution file to perform their specific

tasks,each having different parameter defaults and

incompatibilities.

Concurrent Processing Definitions

An executable file that performs a specific task.The file may be

a program written in a standard language,a reporting tool or

an operating system language.

Concurrent Program Executables


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Concurrent Processing Definitionscontd

Concurrent Request

A request to run a concurrent program as a concurrent

process

Concurrent Process

An instance of a running concurrent program that runs

simultaneously with other concurrent process

ConcurrentManager

A program that processes users requests and runs concurrent

programs.System Administrators define concurrent managers to

run different kinds of requests.


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Creating Concurrent Programs.

1. Write Your program execution file and place it in the

location for your Operating System.

2.Define the concurrent program executable with AOL to

specify an execution file and an execution method for your

program.

3.Define the

a)Concurrent program with AOL

b)Define program parameters

c)Define any incompatibilities with other concurrent

programs.

4)Request your program from the Run reports form

Overview OfDesigning Concurrent Programs

Any Program or any portion of a Form that can be separately constructed to be non-interactive could

potentially be run as a concurrent process.


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Concurrent Program Parameters The Concurrent manager processes up to 100 arguments for a

concurrent program

Handling System Failures Sometimes the concurrent managers fail in the middle of the

program(or the database goes down,or the system crashes)

The concurrent managers restart programs when the system goes upagain

Write your program so that it can restart and run again without

problems-plan to commit at the very end of the program

Designing Concurrent Programs


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Writing Concurrent ProgramsUse Oracle Tools,PL/SQL Procedures to create execution files

Stored Procedure Concurrent Programs You can implement your concurrent program as a stored

procedure.Stored procedure concurrent programs accept input

parameters only and are submitted with the FND_REQUEST package.Submitting a Concurrent Request Your PL/SQL procedures can submit a request to run a program as a

concurrent process by FND_REQUEST.SUBMIT_REQUEST.

Designing Concurrent Programs


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Steps to follow when defining a concurrent programA

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Why do you need a concurrent program?What does it do?

Implementing A Concurrent Program

1.Design a concurrent program

2.Write the program

Choose the appropriate programming language or tool

3.Put the program where Oracle Applications can read it

Place the program in your custom application directory

4.Define your concurrent program executable

Tell Oracle Applications that your program exists


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Implementing A Concurrent Programcontd

5.Define your concurrent programs

Define the specific parameters of your program

Add program to a request group

Assign request group to a responsibility

6.Submit your concurrent program

Either use standard request submission or submit

your program from a procedure or a form


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Write The Program Executables

Oracle Tool Concurrent Programs

PL/SQL Stored Procedures

Oracle Reports programs are powerful

SQL*Plus,PL/SQL,SQL*Loader programs are simpleto write

Appropriate for frequently executed concurrent

programs(including those you develop to replace

immediately concurrent programs from prior releases of

Oracle Applications)

When your application has a simple background

program that does not require any file I/O,you canim lement it as a stored rocedure concurrent ro ram


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Move Your Program File

Oracle Applications looks for executables based on their execution

method

BINSRW

SQL

RPT

LANG

LOG

FORMSLIB

OUT

MESG

PL/SQL

Application


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Define The Concurrent Program Executable

Identify your concurrent program to Oracle Application Object Library

Concurrent Program Executables

Locating Your File

Provide the actual file name of your program file

Provide the application that determines where to look for the file

Provide the execution method


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Define the Concurrent Program Executablecontd

Field Help

In the concurrent programs form,you assign this name to a

concurrent program to associate your concurrent program

with your executable logic

Executable

Application

The concurrent managers use the application to determine

in which directory structure to look for your execution file


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Field Help

The method determines in which directory the concurrent

managers look for your execution file

-FlexRpt:The execution file is written using the FlexReportAPI-FlexSql: The execution file is written using the FlexSql API

-Host:The execution file is a host script

-Oracle Reports

-PL/SQL Stored Procedures

-SQL*Loader:The execution file is a SQL script

-SQL*Plus-Sql*Report

-Spawned:The execution file is a C or PRO*C program

-Immediate:The execution file is a program written to run as a

subroutine of the concurrent manager.We recommend against

defining new immediate concurrent programs and suggest you

use either a PL/SQL stored procedure or a spawned C programinstead

ExecutionMethod


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Field Help

Enter the operating system name of your execution file.Someoperating systems are case sensitive,so the name entered here

should match the file name exactly

Execution File Name

Subroutine Name

Enter the name of your C or PRO*C program subroutine here.Do

not use spaces or periods(.) in this field.


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Define The Concurrent Program Executable

Define the concurrent program that user submit as a concurrent request


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Define your Concurrent Programscontd

Users select the program when submitting a request

Applications pass the short name to the concurrent manager

Applications can determine which oracle ID to use

Disabling the program removes it from user access

Identify the Program

Executable

Specify the name of the concurrent program executable you

defined

Provide options as necessary (oracle reports can specify binary

mode ,page size and page orientation)

Customize your queues with program level priority


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Define Your Concurrent Programs contd

Use the Concurrent Program Parameter window to enter detailed

information about your parameters

Parameter Information Sets up Submit Request Parameter Window

Only Standard Request Submission programs use parameter windows

Define a value set for each argument


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Sequence:Choose the sequence numbers that specify the order

in which your program receives parameter values from theconcurrent manager

Disabled parameters do not display at request submission time

and are not passed to your execution file

Field Help

Validation

Value Set:Enter the name of the value set you want yourparameter to use for validation.you can only select from

independent,table,and non-validated value sets with 240

characters or less

Default Type:If you want to set a default value for this

parameter, identify the type of value you need

Default Value:You can enter a default value for the parameterbased on your default type


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Validation

Required:If the program executable file requires an

argument,you should require it for your concurrent program

Range:Choose either low or high if you want to validate your

parameter value against the value of another parameter in this

structure

Display Characteristics

Display Size:Enter the field length in characters for this

parameter.The users sees and fills in the field in the parameters

window of the submit request window

Prompt:A user sees the prompt instead of the parameter name

Token:For a parameter in an Oracle Reports program,the

keyword or parameter appears here.The value is case sensitive


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Define Your Concurrent Programs contd

Use the Incompatible Programs window

Use with Logical Databases

List the concurrent programs that interfere with your program


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Field Help

Application:Although the default for this field is the applicationof your concurrent program,you can enter any valid application

name

Name:Your list displays the user-friendly name of the

program,the short name,and the description of the program

Scope:Enter set or program only to specify whether your

concurrent program is incompatible with this program and all its

child requests(set) or only with this program(program only)


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Submit Your Concurrent Program

Use FND_REQUEST.SUBMIT_REQUEST(Client or Server)

Any PL/SQL procedure you develop-whether it runs on the client or

on the server as a stored procedure or a database trigger-can submit a

concurrent request to run a concurrent program

Function FND_REQUEST.SUBMIT REQUEST(

application IN varchar2 default NULL,

program IN varchar2 default NULL,

description IN varchar2 default NULL,

start_time IN varchar2 default NULL,sub_request IN boolean default False,

argument1,

argument2,

.

.

argument100)return number;

Submit your program either through SRS,from a form,or from a procedure


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Submit Your Concurrent Programcontd

Use FND_REQUEST.SUBMIT_REQUEST(Client or Server)

The function returns the concurrent request ID,or 0 if it fails tosubmit your request

Set options before calling

FND_REQUEST.SUBMIT_REQUEST

-FND_REQUEST.SET_OPTIONS(Client or Server)

-FND_REQUEST.SET_REPEAT_OPTIONS(Client or Server)

-FND_REQUEST.SET_PRINT_OPTIONS(Client or Server)

Submit your program either through SRS,from a form,or from a procedure


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Submit Your Concurrent Programs contd

Include your concurrent program in a request group to make it

available on the submit request window

Add your program to a request group

Your type is program

Identify the name and application of your concurrent program


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