CD160_exercise.pdf

8/11/2019 CD160_exercise.pdf

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SAP NETWEAVER DECISION SERVICE

MANAGEMENT – A PARADIGM SHIFT

CD160

Exercises / Solutions Alexander Held, SAP Deutschland AG & Co. KGCarsten Ziegler, SAP AG



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In these exercises, we want to set up a managed system and assign a sample application to it (Exercise 1).

This application derives the price of a product (Exercises 2 and 3), adds shipping costs of 5% but at least $2

if the price is under $100 (Exercise 4) and sends a notification mail if a product is not found in the price list

(Exercise 4). Then we want to simulate the application on the managed system (Exercise 5) before we

deploy it and call it from the managed system (Exercise 6). Finally, we will make a delta deployment with an

activation timestamp in the future (Exercise 7).

OGIN INFORMATION

Please log on to system TDI, client 001 Your user is CD160_US (TechEd LV) or CD160 (TechEd Amsterdam, Bangalore) The password is welcome

The system is an SAP NetWeaver 7.40 system with support package level 03

If the system TDI is not yet available in the SAP Logon, you need to create a connection

To do so, choose the New icon Connection

Select User Specified System

Choose Next

Enter the following valueso Description: TDI o Message Server: localhost

o Instance Number: 00 o System ID: TDI

Choose Finish

http://dewdfgwp00690.wdf.sap.corp:8000/sap/bc/webdynpro/sap/fdt_wd_dsm?sap-client=001&sap-language=EN

http://dewdfgwp00690.wdf.sap.corp:8000/sap/bc/webdynpro/sap/fdt_wd_dsm?sap-client=001&sap-language=EN



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EXERCISE 1

Create a Managed System and a BRFplus Application for your Business Rules

Call SAP NetWeaver Decision Service Management Create a managed system Check further properties of the managed system Create a new BRFplus application

Walkthrough

Call SAP NetWeaver DecisionService Management

Call the transaction DSM inthe SAP backend systemor enter the link shownabove

A browser window willappear and DecisionService Manager startsautomatically



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Create a managed system- Choose the New icon- A dialog box in which

you can specify theSystem Name (forexample CD160_MS),

Description (forexample <YourName>appears: HandsOnlecture CD160 DSM),the RFC-Connection tothe Managed System(select theRFC_Destination TDIusing the F4 Help )and the Documentation

- The System Type fieldcan automatically bereceived from the

Managed System. Alternatively, you canalso enter the systemtype yourself (forexample DevelopmentSystem)

- Choose Add to createthe Managed System.Now a managedsystem has been

added to DecisionService Manager

Choose the Save button. Asuccess message appears.

Check further properties of theManaged System

Select the ManagedSystem you created beforefrom the list shown in thetable Managed Systems

Check the properties in thetabs Deployment, Applications and TechnicalInformation. On thedifferent tabs, you canaccess the informationrelevant to your managedsystem. On the

Deployment tab, you can



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see all of the decisionservices that have beendeployed to the managedsystem. On the Applications tab, allBRFplus applications

assigned to this managedsystem are displayed.Currently the tab is emptybecause we haven'tcreated a BRFplusapplication yet. TheTechnical Information tabwill give you an overview ofsome technical figures ofthe managed system.

Create a new BRFplus

application assigned to themanaged system

Navigate to the Applications tab

Choose New

In the Create Application dialog box, enter Name,Short Text, and Text , forexample TechEd_<yourname> (you can use thesame text string for allthree fields, if the text is

short enough (20characters). The Name field only allows ASCIIcharacters, numbers, andunderscores.

Select the Create Local Application checkbox

Choose Create. TheBRFplus application willautomatically be assignedto the managed system

Choose Save

Change to Display mode



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EXERCISE 2

Create a Function and a Ruleset Navigate from Decision Server Manager to the BRFplus Workbench

Create a decision Service (BRFplus Function) assigned to the application created in exercise 1 Define the signature of the function

Input parameter is the product name

Output parameter is the price Create a ruleset assigned to the function

Walkthrough Navigate to the BRFplus

Workbench

Choose the Open BRFplusWorkbench button to startthe BRFplus Workbench.You can also use thetransaction BRFplus (SAPGUI Transaction). A newbrowser window will openand the BRFplusWorkbench is displayed.

Close the DSM browserwindow



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Choose the Personalize icon at the upper right ofthe screen and selectShow in Change Mode asViewing Mode

Select the Show Technical Aspects checkbox

Then choose Save. Bydoing so, you do not needto change to edit mode inevery single screen

Create a BRFplus functionassigned to the Applicationcreated in Exercise 1

Choose Search on theRepository tab

Enter the name of theapplication created inExercise 1 and choose theSearch button

The application you’vecreated will be displayedon the Repository Tab

Click on the applicationand select ContainedObjects tab and choose

Create Object (make surefunction is selected)



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Enter Name (max. 30characters), Short Text (max. 20 characters), andText (max. 80 characters),such as Product Price.Choose Create And

Navigate To Object

Define the signature of thefunction

Select the Signature tab

Choose Add New DataObject Add New DataObject

Select Element Type

Enter Name, Short Text,Text , such as Product

For Length, select areasonable text length forproduct names, such as 40

Choose Create AndNavigate To Object andchoose Yes to save yourentries



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Select the Domain Valuestab

Choose Create Value

Hint: In the Domain Value section we can definedomain values/constantsthat can later be used in avalue help when definingthe rules. When you bindyour input values to aDDIC attribute, the domainvalues will automatically bederived from the DDIC.DDIC values will beretrieved from themanaged system

automatically

Enter Name, Short Text, Text,and Value, such as TennisRacket and choose Create

Repeat that previous stepfor additional products, forexample Baseball bar,Football, Golf club, Paddle,Paint Ball Gun.... Whenyou are done, you willhave a value list of

products that can be usedin your decision service

Choose Back and confirmby choosing Yes to returnto the function



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Make sure you are in thefunction editor

At the Result Data Object

choose the icon to the rightof the word Actions andselect Create...

Select Element Type

Enter Name, Short Textand Text, for example,Price

Select element type Amount

Select Positive Values (price determination shouldalways return a positive

amount that has to be paidby the customer)

Choose Create



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You have now defined thedecision service ProductPrice. This service needs a

Product and based on thatthe Price (includingshipping costs) will bereturned. Now you need todefine the rules forcalculating the productprice. To do so, we firsthave to create a Ruleset(encapsulates the rules).

Create a Ruleset assigned tothe function

Select the AssignedRuleset tab

Choose Create Ruleset

Enter Name, Short Textand Text , for example,Product Price

Choose Create AndNavigate To Object andthen choose Yes toconfirm



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Choose Save

You have now created the framework for your decision service. What is left is to create the rules themselves and to testthem and deploy them into the managed system. This will be part of the following exercises.



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EXERCISE 3

Define a simple Rule In the ruleset defined in Exercise 2, create a rule using a decision table The decision table will return the price for a specific product

If there are several entries for the same product, the first one is taken into consideration If no matching entry is available, an initial value is returned

Walkthrough In the ruleset defined in

Exercise 2, create a rule usinga decision table

Ensure you are in theruleset editor for theruleset you created in thelast exercise

Select Insert Rule Create...



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Enter a Description, forexample, Look up product price

At the Then branch,choose Add Process

Expression Create...

Select the Decision Tabletype

Enter Name, Short Text,and Text , for exampleProduct Prices

Select the Data ObjectPrice as Result DataObject (you created it inExercise 2 as the resultdata object of the decision

service) Click Create And Navigate

To the Object and confirmthe popup window withYes

Choose the Table Settings

button to define thecondition columns for thedecision table



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Choose Insert Columnunder Condition Columns From Context DataObjects ...

Select Product (the nameof the data element thatyou created above inExercise 2) and chooseOK

Choose OK

Choose Insert New Row

Choose ... in the firstcolumn of the new row

Enter a product name inthe empty field. You nowhave two options. Eitheryou can write the valuesdirectly into the empty fieldor you can use the valuehelp. In the value help, youwill see the domain valuesyou created earlier inExercise 2.

After entering a value,choose OK



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Choose ... in the secondcolumn of the same newrow

Enter a price and acurrency, for example,USD for US Dollars (you

can select a valid currencyby clicking on the icon tothe right of the currencyfield) and choose OK. Weare using US Dollars in thisexample. If you are goingfor another currency, youneed to replace US Dollarswith that currency in alllater occurrences

Repeat the last six steps(from “Choose Insert NewRow ”) for several products.

Also include at least oneproduct more than oncewith different prices

Choose Back and confirmby choosing Yes (nowselect the ruleset youcreated earlier)

Choose OK to close therule Look up product prices

Choose Save

You have now created a complete BRFplus application. In the next exercise you will extend that application by adding

the shipping costs to a product that costs less than $100.



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EXERCISE 4

Define more complex Rules Add other rules to the existing ruleset using formulas and actions (such as sending an email)

If the product was not found in the price list (price is set to initial value), trigger a notification email to a fixed

email address If the product was found in the decision table, derive the shipping costs (5% but at least $2 if the price is under

$100, $0 if the price is $100 or more) by using a formula and add the costs to the price

Walkthrough Add other rules to the

existing ruleset usingformulas and actions

In the ruleset on theright side of the thatrule we alreadycreated, chooseOptions Insert NextRule by ... Create ...

Enter a Description,such as Product notvalid Choose AssignCondition ... UseValue Range From ... Context Price



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Select condition isintial

Under the Then branchchoose Add Perform Action Create ...

Select type Send Email(Action)

Enter Name, ShortText, and Text , forexample, NotificationMail

Choose Create AndNavigate To Object and confirm bychoosing Yes



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In the Recipient(s) field, enter an arbitraryemail address (We arenot going to actuallysend a mail. Theaddress still needs to

be technically correct,however it does notneed to exist)

Enter some Subject ,for example,Notification: Productnot available

Enter the body text,where you can replacethe product name by&1, for example, Hellocustomer, product &1does not exist.Regards, Your SalesTeam

Choose RefreshMessage Placeholders

Choose the icon to theright of Placeholder 1 and select Context Parameters

Choose Back andconfirm by choosingwith Yes (the ruleshould now be

selected)

Choose OK again

In the ruleset on theright side of the rulethat you createdearlier, choose Options Insert Next ExitCondition Use

Value Range from Context Price



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Select is initial ascondition

In the ruleset on theright side of the exitcondition that youcreated before, choose Options Insert NextRule Create ...

Enter a Description, for

example Add ShippingCosts

Choose AssignCondition ... UseValue Range From ... Context Price

Select is less than ascondition and insert100 USD in the valuefield

In the THEN branch,choose Add Process Expression Create ...



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Select Formula type

Enter Name, ShortText, and Text , forexample, AddShipping Costs

Select Price as theresult data object

Choose Create AndNavigate To Object and confirm bychoosing Yes

By using the context elements, operators, and formula function offered on the lower part of the screen, enterthe formula:

Price + MAX ( 2_USD, Price * 0,05 ) for TechEd Amsterdam and Bangalore; for TechEd Las Vegas, pleaseuse 0.05 instead of 0,05.

Choose the Check button to make sure that the formula is consistent

Choose Back and confirm the dialog box by choosing Yes (the rule should now be selected)

Choose OK . You should now be back in the ruleset



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You have now finished modelling your business rules! The next exercise will guide you through activating andtesting your rules on the managed system



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EXERCISE 5

Simulate the Rules on the Managed System (Remote Simulation) Activate all created objects

Run the function in simulation mode on the managed system Enter different products, including products that are not listed or are listed more than once, and watch the

results

Check the intermediate results of rules processing

Walkthrough Activate all of the created

objects

If the repository treeis collapsed, expandit

In the repository treeon the left, select theruleset you createdearlier

Choose Activate



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Make sure that theInclude ReferencedObjects checkbox isselected

Confirm the dialog

box by choosing Yes

On the upper left of the screen, you should see the success message Objects activated and all of the objectsyou created should show a green icon in the repository tree, indicating that they are active

Run the function insimulation mode on themanaged system

In the repository treeon the left, select thefunction you createdearlier

Choose StartSimulation. A dialogbox appears.

Select Remote(Current Version) inthe Simulation Mode

section. This optionwill deploy yourdecision service intothe managed systemspecified in theManaged System

section (decisionservice not active forproductive use).Please select themanaged system youcreated in Exercise1.

Choose Continue



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Enter a product (youcan select productsyou created earlierby clicking on theicon to the right of

the input field) Choose Execute and

Display ProcessingSteps

Notice the resulting price at the top of the screen

When you are finished with the simulation of your Decision Service, choose Back to Workbench.



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EXERCISE 6

Deploy the Decision Service to the Managed System Deploy the decision service into your managed system

Select the managed system you created in Exercise 1

Make a test deployment and then deploy the decision service Execute your decision service in the managed system

Implement an ABAP report that calls the deployed decision service

Hint: The second part of the exercise is intended for people who are familiar with ABAP Programming

Walkthrough

Deploy the decision service intoyour managed system

Navigate from the BRFplusWorkbench directly to theDecision Service Manager.Click in the toolbar onWorkbench OpenDecision Service Manager orenter the transaction DSM inthe SAP GUI. The DSMWorkbench will now open ina new browser session.

Select the managed systemyou created in Exercise 1and on the Deployment tab,choose the Deployment Testbutton



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Select the BRFplus functionyou created in Exercise 2.Enter the name of yourfunction, for example,Product* and choose theSearch button

Mark your function andchoose Run Test . DSM willnow check whether yourfunction can be deployed tothe managed system

After the test deployment hasbeen performed, themessage Deployment testwas successful, do you wantto deploy now? will appear.Choose Yes to start thedeployment

In the dialog box, pleaseenter some form ofdocumentation, such asInitial deployment of theDecision Service ProductPrice

Select IntermediateDeployment as the activationtime and click on Deploy

In the upper part of thescreen, two successmessages are displayed. Onthe Deployment tab, you willnow see that your functionhas been deployed to themanaged system. Click in thecolumn Documentation and

check the entries

Congratulations! You have deployed your first decision service into a managed system. In the next step, we willexecute your decision service in the managed system.



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Execute your decision service inthe managed system

Go to the Deployment tab

Select the decision service,for example, Product Price.The BRFplus Workbench will

open

Choose Create CodeTemplate

Deselect the ShowComments checkbox

Choose Apply

Copy the text

Switch to the SAP GUI

In the popup enter a tile and

choose the Executable program as type and TestProgram as Status and pressSave

In the pop up choose LocalObject

Call the ABAP Editor(transaction SE38)

Create a local report with thefollowing name‘ZZ_CALL_TECHED_EX_CD160 ’

Paste the copied text into thereport

Insert the variable ‘lv_price’of typeif_fdt_types=>element_amount to the Data-Statement

Replace the text ‘[INSERTCONTEXT VALUE HEREOR DELETE THE LINE].’ with one of the products



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At the end of the report, include the following:

Save, Activate, and Run the Report

LO_PROCESSOR will find the deployed code of the decision service and execute it

The result should be the same as in the simulation in Exercise 5



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EXERCISE 7

Change Rules in the Decision Service and make a Delta Deployment Change the rules in the DSM System

Go to the decision table PRODUCT_PRICES and adjust the price

Simulate the function Execute the report you created in Exercise 6 again. What do think will happen?

Perform a delta deployment

Deploy the decision service to the managed system as a future deployment (current time + 5 minutes)

Execute the report created in Exercise 6

Wait 5 minutes and run the report again

Walkthrough Change the rules in the DSM

System

Select Open BRFplusWorkbench in DecisionService Manager

The BRFplus Workbenchappears in a new browserwindow. Choose Search

and enter the name of theapplication you created in

Exercise 1. Choose Application as the ObjectType. Choose Search. Onthe left-hand side, in the

navigation area, theapplication you created is

displayed Expand the repository tree

and navigate to Expression

Decision Table



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Product Price

Change the price for allproducts (click directly onthe price and table open.Change the price andchoose OK)

Activate the decision table

In the repository tree, go toyour function

Choose Simulation andsimulate the function asexplained in Exercise 5.Select Remote (CurrentVersion) for the simulationmode. Select the managed

system you created inExercise 1 and chooseContinue

Enter a product whoseprice you change. Theprice should now becalculated based on yourchange

Go to the SAP GUI and navigate to the report you created in Exercise 6 and execute it. (Make sure the productis the same as in your simulation).

The prices calculated in the simulation and by the report are different. Since we only changed the prices in the

DSM system, the managed system will not be affected by those changes. So it would be possible to test allchanges in the rules before deploying them to the productive environment

In the next step we will perform a delta deployment and distribute the new decision service to the managedsystem

Perform a delta deployment

Call transaction DSM fromSAP GUI

Select the managedsystem you created inExercise 1 and click on theDeployment tab, choose

Deploy button Select the BRFplus

function you created inExercise 2. Enter the nameof your function, forexample, Price* andchoose Search



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On the screen, pleaseenter a description, forexample, DeltaDeployment. PricesChanged for all products.Go Live of new rules will

be in 5 minutes.... Select As on Date/Time as

the activation time, definethe current time + 5minutes as timestamp andChoose Deploy

Check the valid from/validto timestamps on theDeployment tab for yourdecision service. (Theservice deployedpreviously will be valid in 5minutes as long as the olddecision service isprocessed).

Navigate to the report you created in the previous exercise. Execute it. You will get the same result as before.Please write down the result.

Wait 5 minutes and then execute your report again. Compare the current result with the result you wrote down.The price should now be different from 5 minutes ago!



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CD160_exercise.pdf