Multithreading
This document was uploaded by user and they confirmed that they have the permission to share it. If you are author or own the copyright of this book, please report to us by using this DMCA report form. Report DMCA
Overview
Download & View Multithreading as PDF for free.
More details
- Words: 1,572
- Pages: 28
Loading documents preview...
1
Multithreading
Objectives
Objectives Learning Objectives
Slid e2
2
Introduction to Services and multithreading in T24
Components of a multi-threaded routine
Writing a multithreaded program
Executing a multithreaded program
More on multithreading
Service
Slid e3
3
Services are background multithreaded processes.
Services can be executed as a
Part of COB. COB itself is a service
An independent standalone online service
Slid e4
Components of a Service
4
JOB
BATCH
SERVICE
• • •
Is a unit of work executing a business transaction No need of user intervention. For example Interest capitalization for accounts.
Is a set of Jobs that form a business transaction.
Is a trigger to Execute a Batch
Slid e5
JOB
5
•
A job involves processing a set of records.
•
For example - Interest calculation Get list of IDs to process Find the balance for each ID Calculate interest Write to file
Slid e6
How jobs are multithreaded in T24
6
1
Service Agents
List of contracts to process
1
Server
Service Manager
2
2
Server
3 4
3
Server
5 6
If one agent terminates then its transaction is rolled back and the other agents process the contract. Add more agents to increase throughput
Slid e7
Components of a Service
7
JOB.LOAD
Initialise common variables BATCH.JOB.CONTROL
JOB.SELECT
Prepare list of IDs
JOB
Processing Logic
SERVICE
Demo multithreading
Slid e8
8
Requirement Issue gift voucher to all Customers in Modelbank
•
Algorithm
Step 1 : Open CUSTOMER
Step 2 : Open EB.GIFT.VOUCHER
Step 3 : Initialise gift voucher value to 500
Step 4 : Prepare the list of Customer IDs to whom the gift vouchers will be issued
Step 5 : Loop through the IDs
5.1 : Read CUSTOMER record using the ID and get the name
5.2 : Write customer id, name and gift voucher amount to EB.GIFT.VOUCHER
Note: You must write EB.GIFT.VOUCHER, EB.GIFT.VOUCHER.FIELDS and run EB.DEV.HELPER to create the files
Slide 9
.LOAD Method
9
<JOB>.LOAD When is the method executed ?
First method to be executed How is the method used ?
Will be executed by each agent
Name <JOB-NAME>.LOAD In our example , this routine is used to: 1. Initialise the voucher amount. 2. Open CUSTOMER
How?
When?
3. Open EB.GIFT.VOUCHER The variables used here have to be declared in a common insert.
What?
What is the method used for? This method is used for initialising the common variables
Common Variables
Slide 10
10
I_<JOB>.COMMON
• This file is used for declaring the common variables
Slid e 11
SELECT Method
11
When is the method executed ?
<JOB>.SELECT
This is the method will be executed after LOAD routine Will be executed by ONE agent only
How is the method used ? Name <JOB-NAME>.SELECT In our example , this routine is used to : 1. To select the list of IDs to process.
How?
When?
2. Call API ‘BATCH.BUILD.LIST’ to write the selected IDs into a JOB LIST file
What?
What is the method used for?
This method is used to select the list of contracts
.SELECT (BATCH.BUILD.LIST)
Slide 12
12
.SELECT routine calls BATCH.BUILD.LIST to perform the selection of contracts.
It takes 2 parameters
First parameter is a dynamic array (7 values in total)
Second parameter holds the ID list.
EX : CALL BATCH.BUILD.LIST('',ID.LIST)
The first parameter can take the following 7 values in the order specified:
.SELECT (BATCH.BUILD.LIST)
Slide 13
13
.SELECT routine calls BATCH.BUILD.LIST to perform the selection of contracts.
It takes 2 parameters
First parameter is a dynamic array (7 values in total)
Second parameter holds the ID list.
EX : CALL BATCH.BUILD.LIST('',ID.LIST)
The first parameter can take the following 7 values in the order specified:
Slid e 14
RECORD routine
14
<JOB>
When is the method executed ? This method will be executed after the list of IDs to be
How is the method used ?
processed is ready .
Name - <JOB-NAME>
This method will be executed once for each ID in the
In our example , this routine is used
list
to:
1. Read the CUSTOMER record using the ID received as parameter
How?
When?
2. Get Customer Name
3. Write the Customer ID, Name and Voucher amount to
What?
EB.GIFT.VOUCHER What is the method used for? This method implements the processing logic
Slid e 15
Solution *Contents of I_GIFT.VOUCHER.COMMON I_GIFT.VOUCHER.COMMON Common Variables COM/GIFT.VOUCHER/FN.CUSTOMER, F.CUSTOMER, F.GIFT.VOUCHER, SUBROUTINE GIFT.VOUCHER.LOAD FN.GIFT.VOUCHER, VOUCHER.VALUE I_COMMON *Customers will be issued a$INSERT gift voucher of GIFT.VOUCHER.LOAD $INSERT I_EQUATE value 500 $INSERT I_GIFT.VOUCHER.COMMON VOUCHER.VALUE = 500 FN. CUSTOMER='F.CUSTOMER' F. CUSTOMER='' SUBROUTINE GIFT.VOUCHER.SELECT CALL OPF(FN.CUSTOMER,F.CUSTOMER) GIFT.VOUCHER.SELECT $INSERT I_COMMON FN.GIFT.VOUCHER='F.EB.GIFT.VOUCHER' $INSERT I_EQUATE F.GIFT.VOUCHER='' SUBROUTINE GIFT.VOUCHER(ID) $INSERT I_GIFT.VOUCHER.COMMON CALL OPF(FN.EB.GIFT.VOUCHER,F.GIFT.VOUCHER) $INSERT I_COMMON SEL.LIST=‘’ RETURN $INSERT I_EQUATE BBL.DATA=‘’ END $INSERT I_F.CUSTOMER BBL.DATA<2>=‘F.CUSTOMER’ $INSERT I_GIFT.VOUCHER.COMMON CALL BATCH.BUILD.LIST(BBL.DATA,SEL.LIST) CALL F.READ(FN.CUSTOMER,ID,R.CUSTOMER,F.CUSTOMER,READ.ERR) RETURN CUSTOMER.NAME= R.CUSTOMER<EB.CUS.SHORT.NAME> END R.GIFT.VOUCHER='' R.GIFT.VOUCHER<-1>=ID R.GIFT.VOUCHER<-1>=CUSTOMER.NAME R.GIFT.VOUCHER<-1>=VOUCHER.VALUE CALL F.WRITE(FN.GIFT.VOUCHER,ID,R.GIFT.VOUCHER) RETURN END GIFT.VOUCHER
15
Configuring a job in T24 17
Create a PGM.FILE entry with B as TYPE and BATCH.JOB as @BATCH.JOB.CONTROL.
Create a BATCH record with the JOB.NAME as PGM.FILE record ID.
Create a TSA.SERVICE record with the ID same as BATCH record ID.
Start TSM. Note down the TSA ID for your routine. Now start the TSAs
Configuring a job in T24 18
Slid e 19
How does T24 process the JOB
19
Agent 1
Agent 2
Initialise CommonVariables
Initialise Common Variables BJC BJC
Create List File
Get the Contract to process
Get the Contract to process
ID 31
100724 120019
Data 1
100724
2
100112
Begin Transaction
Customer
Commit
100725 100112
Begin Transaction
Issue gift voucher 100724 120019
42
500
3
120019
4
100725
Gift Voucher
Issue Gift Voucher 100112 100725
Customer Customer
500 500
Commit
Continue till the end of list file
Workshop
Workshop Workshop
Slid e 20
20
Write a multi threaded routine to set the status of the debit card issued.
Use DAS routine to fetch the list of Debit Card IDs
What if you want to process selected records
Slid e 21
21
You can implement this in 2 ways:
Filter criteria in SELECT routine
A .FILTER routine
When the selection is not based on a simple criteria, a .FILTER routine is written. For eg IF
FIELD(ID,"-",2) GT TODAY THEN
ID = "" ; * not due
END
ELSE
ID = FIELD(ID,"-",1) ; * set to account number
END
Slide 22
FILTER Method
22
.FILTER
When is the method executed ? This routine is called from BATCH.BUILD.LIST for each Contract ID selected
How is the method used ? Name - <JOB-NAME>.FILTER
How?
When?
What?
What is the method used for? This is method called once per contract , to decide whether it must
be part of the list file or not
.FILTER routine – an example
Slid e 23
23
SUBROUTINE GIFT.VOUCHER.FILTER(ID) $INSERT I_COMMON $INSERT I_EQUATE $INSERT I_F.CUSTOMER $INSERT I_GIFT.VOUCHER.COMMON CUSTOMER.ID.PREFIX=SUBSTRINGS(ID,1,3) IF CUSTOMER.ID.PREFIX NE 100 THEN ID = “” END RETURN END
CONTROL.LIST 24
Interest is accrued on working days Interest must be accrued for weekend also.
Interest Accrual Current Date
Interest Accrual Current Date + 1
CONTROL.LIST
1. 2. 3.
A variable in I_BATCH.FILES Used for sequencing Initialised and controlled in .SELECT routine
Interest Accrual Current Date + 2
CONTROL.LIST 25
Interest is accrued on working days Interest must be accrued for weekend also.
Interest Accrual Current Date
Interest Accrual Current Date + 1
CONTROL.LIST
1. 2. 3.
A variable in I_BATCH.FILES Used for sequencing Initialised and controlled in .SELECT routine
Interest Accrual Current Date + 2
Sample .SELECT with CONTROL.LIST populated
Slid e 26
26
SUBROUTINE LD.INTERESTT.SELECT $INSERT I_COMMON $INSERT I_EQUATE $INSERT I_BATCH.FILES $INSERT I_F.DATES *First time it will be NULL so go build it IF NOT(CONTROL.LIST) THEN CURR.DATE=TODAY NEXT.DATE=R.DATES(EB.DATNEXT.WORKING.DAY) CALL CDT(‘’,NEXT.DATE,’-1C’) IF CURR.DATE NE NEXT.DATE THEN GOSUB BUILD.CONTROL.LIST END END FN.FILE.NAME = ‘F.LD.LOANS.AND.DEPOSITS’ *Second call to BBL to build CUSTOMER LIST GOSUB CALL.BBL RETURN
CALL.BBL: SEL.CMD = 'SELECT ':FN.FILE.NAME ID.LIST = ''; NO.RECS = ‘’ CALL EB.READLIST(SEL.CMD, ID.LIST,'',NO.RECS, '') IF ID.LIST THEN LIST.PARAMETERS = '' CALL BATCH.BUILD.LIST(LIST.PARAMETERS, ID.LIST) END RETURN BUILD.CONTROL.LIST: CONTROL.LIST = ‘CALCULATE.INTEREST’ CONTROL.LIST<-1> = ‘CALCULATE.INTEREST’ CONTROL.LIST<-1>=‘CALCULATE.INTEREST’ RETURN END
Slid e 27
How does T24 process the JOB Repeat the process till the end of the CONTROL.LIST
Agent 1 Initialise Global Variables
List 1
CONTROL.LIST
List 2
27
Agent 2 Initialise Global Variables
Create List File
BJC BJC
Get the Contract to process
Get the Contract to process
ID 3
120019
Data 1
100724
2
100112
4
Begin Transaction
Begin Transaction Issue gift voucher
120019
Customer
Commit
100725
500
3
120019
4
100725
Issue Gift Voucher
Gift Voucher
100725
100724
Customer
500
100112
Customer
500
Customer
Commit
500
Quiz
Quiz – True/False
Slid e 28
28
1.
Every multi threaded routine has three entries in PGM.FILE for the .LOAD, .SELECT and record routine
2.
Select routine is executed by all the tSAs
3.
BATCH.BUILD.LIST is the subroutine which writes the selected contract ids into the LIST FILE
4.
CONTROL.LIST is a common variable defined in I_COMMON
5.
Filter routine is executed once for each for each Contract ID
Objectives
Summary Learning Objectives
Slid e 29
29
In this learning unit you learnt about
The various parts of a Multi threaded subroutine in
T24
The use of each part of the Multi threaded subroutine in T24
How to execute a multi threaded routine in T24
Multithreading
Objectives
Objectives Learning Objectives
Slid e2
2
Introduction to Services and multithreading in T24
Components of a multi-threaded routine
Writing a multithreaded program
Executing a multithreaded program
More on multithreading
Service
Slid e3
3
Services are background multithreaded processes.
Services can be executed as a
Part of COB. COB itself is a service
An independent standalone online service
Slid e4
Components of a Service
4
JOB
BATCH
SERVICE
• • •
Is a unit of work executing a business transaction No need of user intervention. For example Interest capitalization for accounts.
Is a set of Jobs that form a business transaction.
Is a trigger to Execute a Batch
Slid e5
JOB
5
•
A job involves processing a set of records.
•
For example - Interest calculation Get list of IDs to process Find the balance for each ID Calculate interest Write to file
Slid e6
How jobs are multithreaded in T24
6
1
Service Agents
List of contracts to process
1
Server
Service Manager
2
2
Server
3 4
3
Server
5 6
If one agent terminates then its transaction is rolled back and the other agents process the contract. Add more agents to increase throughput
Slid e7
Components of a Service
7
JOB.LOAD
Initialise common variables BATCH.JOB.CONTROL
JOB.SELECT
Prepare list of IDs
JOB
Processing Logic
SERVICE
Demo multithreading
Slid e8
8
Requirement Issue gift voucher to all Customers in Modelbank
•
Algorithm
Step 1 : Open CUSTOMER
Step 2 : Open EB.GIFT.VOUCHER
Step 3 : Initialise gift voucher value to 500
Step 4 : Prepare the list of Customer IDs to whom the gift vouchers will be issued
Step 5 : Loop through the IDs
5.1 : Read CUSTOMER record using the ID and get the name
5.2 : Write customer id, name and gift voucher amount to EB.GIFT.VOUCHER
Note: You must write EB.GIFT.VOUCHER, EB.GIFT.VOUCHER.FIELDS and run EB.DEV.HELPER to create the files
Slide 9
.LOAD Method
9
<JOB>.LOAD When is the method executed ?
First method to be executed How is the method used ?
Will be executed by each agent
Name <JOB-NAME>.LOAD In our example , this routine is used to: 1. Initialise the voucher amount. 2. Open CUSTOMER
How?
When?
3. Open EB.GIFT.VOUCHER The variables used here have to be declared in a common insert.
What?
What is the method used for? This method is used for initialising the common variables
Common Variables
Slide 10
10
I_<JOB>.COMMON
• This file is used for declaring the common variables
Slid e 11
SELECT Method
11
When is the method executed ?
<JOB>.SELECT
This is the method will be executed after LOAD routine Will be executed by ONE agent only
How is the method used ? Name <JOB-NAME>.SELECT In our example , this routine is used to : 1. To select the list of IDs to process.
How?
When?
2. Call API ‘BATCH.BUILD.LIST’ to write the selected IDs into a JOB LIST file
What?
What is the method used for?
This method is used to select the list of contracts
.SELECT (BATCH.BUILD.LIST)
Slide 12
12
.SELECT routine calls BATCH.BUILD.LIST to perform the selection of contracts.
It takes 2 parameters
First parameter is a dynamic array (7 values in total)
Second parameter holds the ID list.
EX : CALL BATCH.BUILD.LIST('',ID.LIST)
The first parameter can take the following 7 values in the order specified:
.SELECT (BATCH.BUILD.LIST)
Slide 13
13
.SELECT routine calls BATCH.BUILD.LIST to perform the selection of contracts.
It takes 2 parameters
First parameter is a dynamic array (7 values in total)
Second parameter holds the ID list.
EX : CALL BATCH.BUILD.LIST('',ID.LIST)
The first parameter can take the following 7 values in the order specified:
Slid e 14
RECORD routine
14
<JOB>
When is the method executed ? This method will be executed after the list of IDs to be
How is the method used ?
processed is ready .
Name - <JOB-NAME>
This method will be executed once for each ID in the
In our example , this routine is used
list
to:
1. Read the CUSTOMER record using the ID received as parameter
How?
When?
2. Get Customer Name
3. Write the Customer ID, Name and Voucher amount to
What?
EB.GIFT.VOUCHER What is the method used for? This method implements the processing logic
Slid e 15
Solution *Contents of I_GIFT.VOUCHER.COMMON I_GIFT.VOUCHER.COMMON Common Variables COM/GIFT.VOUCHER/FN.CUSTOMER, F.CUSTOMER, F.GIFT.VOUCHER, SUBROUTINE GIFT.VOUCHER.LOAD FN.GIFT.VOUCHER, VOUCHER.VALUE I_COMMON *Customers will be issued a$INSERT gift voucher of GIFT.VOUCHER.LOAD $INSERT I_EQUATE value 500 $INSERT I_GIFT.VOUCHER.COMMON VOUCHER.VALUE = 500 FN. CUSTOMER='F.CUSTOMER' F. CUSTOMER='' SUBROUTINE GIFT.VOUCHER.SELECT CALL OPF(FN.CUSTOMER,F.CUSTOMER) GIFT.VOUCHER.SELECT $INSERT I_COMMON FN.GIFT.VOUCHER='F.EB.GIFT.VOUCHER' $INSERT I_EQUATE F.GIFT.VOUCHER='' SUBROUTINE GIFT.VOUCHER(ID) $INSERT I_GIFT.VOUCHER.COMMON CALL OPF(FN.EB.GIFT.VOUCHER,F.GIFT.VOUCHER) $INSERT I_COMMON SEL.LIST=‘’ RETURN $INSERT I_EQUATE BBL.DATA=‘’ END $INSERT I_F.CUSTOMER BBL.DATA<2>=‘F.CUSTOMER’ $INSERT I_GIFT.VOUCHER.COMMON CALL BATCH.BUILD.LIST(BBL.DATA,SEL.LIST) CALL F.READ(FN.CUSTOMER,ID,R.CUSTOMER,F.CUSTOMER,READ.ERR) RETURN CUSTOMER.NAME= R.CUSTOMER<EB.CUS.SHORT.NAME> END R.GIFT.VOUCHER='' R.GIFT.VOUCHER<-1>=ID R.GIFT.VOUCHER<-1>=CUSTOMER.NAME R.GIFT.VOUCHER<-1>=VOUCHER.VALUE CALL F.WRITE(FN.GIFT.VOUCHER,ID,R.GIFT.VOUCHER) RETURN END GIFT.VOUCHER
15
Configuring a job in T24 17
Create a PGM.FILE entry with B as TYPE and BATCH.JOB as @BATCH.JOB.CONTROL.
Create a BATCH record with the JOB.NAME as PGM.FILE record ID.
Create a TSA.SERVICE record with the ID same as BATCH record ID.
Start TSM. Note down the TSA ID for your routine. Now start the TSAs
Configuring a job in T24 18
Slid e 19
How does T24 process the JOB
19
Agent 1
Agent 2
Initialise CommonVariables
Initialise Common Variables BJC BJC
Create List File
Get the Contract to process
Get the Contract to process
ID 31
100724 120019
Data 1
100724
2
100112
Begin Transaction
Customer
Commit
100725 100112
Begin Transaction
Issue gift voucher 100724 120019
42
500
3
120019
4
100725
Gift Voucher
Issue Gift Voucher 100112 100725
Customer Customer
500 500
Commit
Continue till the end of list file
Workshop
Workshop Workshop
Slid e 20
20
Write a multi threaded routine to set the status of the debit card issued.
Use DAS routine to fetch the list of Debit Card IDs
What if you want to process selected records
Slid e 21
21
You can implement this in 2 ways:
Filter criteria in SELECT routine
A .FILTER routine
When the selection is not based on a simple criteria, a .FILTER routine is written. For eg IF
FIELD(ID,"-",2) GT TODAY THEN
ID = "" ; * not due
END
ELSE
ID = FIELD(ID,"-",1) ; * set to account number
END
Slide 22
FILTER Method
22
.FILTER
When is the method executed ? This routine is called from BATCH.BUILD.LIST for each Contract ID selected
How is the method used ? Name - <JOB-NAME>.FILTER
How?
When?
What?
What is the method used for? This is method called once per contract , to decide whether it must
be part of the list file or not
.FILTER routine – an example
Slid e 23
23
SUBROUTINE GIFT.VOUCHER.FILTER(ID) $INSERT I_COMMON $INSERT I_EQUATE $INSERT I_F.CUSTOMER $INSERT I_GIFT.VOUCHER.COMMON CUSTOMER.ID.PREFIX=SUBSTRINGS(ID,1,3) IF CUSTOMER.ID.PREFIX NE 100 THEN ID = “” END RETURN END
CONTROL.LIST 24
Interest is accrued on working days Interest must be accrued for weekend also.
Interest Accrual Current Date
Interest Accrual Current Date + 1
CONTROL.LIST
1. 2. 3.
A variable in I_BATCH.FILES Used for sequencing Initialised and controlled in .SELECT routine
Interest Accrual Current Date + 2
CONTROL.LIST 25
Interest is accrued on working days Interest must be accrued for weekend also.
Interest Accrual Current Date
Interest Accrual Current Date + 1
CONTROL.LIST
1. 2. 3.
A variable in I_BATCH.FILES Used for sequencing Initialised and controlled in .SELECT routine
Interest Accrual Current Date + 2
Sample .SELECT with CONTROL.LIST populated
Slid e 26
26
SUBROUTINE LD.INTERESTT.SELECT $INSERT I_COMMON $INSERT I_EQUATE $INSERT I_BATCH.FILES $INSERT I_F.DATES *First time it will be NULL so go build it IF NOT(CONTROL.LIST) THEN CURR.DATE=TODAY NEXT.DATE=R.DATES(EB.DATNEXT.WORKING.DAY) CALL CDT(‘’,NEXT.DATE,’-1C’) IF CURR.DATE NE NEXT.DATE THEN GOSUB BUILD.CONTROL.LIST END END FN.FILE.NAME = ‘F.LD.LOANS.AND.DEPOSITS’ *Second call to BBL to build CUSTOMER LIST GOSUB CALL.BBL RETURN
CALL.BBL: SEL.CMD = 'SELECT ':FN.FILE.NAME ID.LIST = ''; NO.RECS = ‘’ CALL EB.READLIST(SEL.CMD, ID.LIST,'',NO.RECS, '') IF ID.LIST THEN LIST.PARAMETERS = '' CALL BATCH.BUILD.LIST(LIST.PARAMETERS, ID.LIST) END RETURN BUILD.CONTROL.LIST: CONTROL.LIST = ‘CALCULATE.INTEREST’ CONTROL.LIST<-1> = ‘CALCULATE.INTEREST’ CONTROL.LIST<-1>=‘CALCULATE.INTEREST’ RETURN END
Slid e 27
How does T24 process the JOB Repeat the process till the end of the CONTROL.LIST
Agent 1 Initialise Global Variables
List 1
CONTROL.LIST
List 2
27
Agent 2 Initialise Global Variables
Create List File
BJC BJC
Get the Contract to process
Get the Contract to process
ID 3
120019
Data 1
100724
2
100112
4
Begin Transaction
Begin Transaction Issue gift voucher
120019
Customer
Commit
100725
500
3
120019
4
100725
Issue Gift Voucher
Gift Voucher
100725
100724
Customer
500
100112
Customer
500
Customer
Commit
500
Quiz
Quiz – True/False
Slid e 28
28
1.
Every multi threaded routine has three entries in PGM.FILE for the .LOAD, .SELECT and record routine
2.
Select routine is executed by all the tSAs
3.
BATCH.BUILD.LIST is the subroutine which writes the selected contract ids into the LIST FILE
4.
CONTROL.LIST is a common variable defined in I_COMMON
5.
Filter routine is executed once for each for each Contract ID
Objectives
Summary Learning Objectives
Slid e 29
29
In this learning unit you learnt about
The various parts of a Multi threaded subroutine in
T24
The use of each part of the Multi threaded subroutine in T24
How to execute a multi threaded routine in T24
Related Documents
Multithreading
January 2021 3More Documents from "Alfredo Soto"
Multithreading
January 2021 3
T24 Menu And Composite Screens-r15 I-1
January 2021 0
23.version Routines R16
January 2021 0
6. T24 Versions-r15
January 2021 0
