Bernard Szlachta: /* Exercises ⌘。 */

2016-09-22T06:43:26Z

Exercises ⌘。

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{{Cat|Drools|020}}

<slideshow style="nobleprog" headingmark="⌘" incmark="…" scaled="false" font="Trebuchet MS" headingmark2="。" lang="中文版" >
;title: Drools Kie
;author: Bernard Szlachta (NobleProg Ltd)
</slideshow>

{{Can I use your material}}

== Resource Structure⌘。 ==
* Organisation Unit（access control, 管理用户的访问权限）
** Repository 1 （physical storage）
** Repository 2
*** Project 1（build）
*** Project 2
**** Package 1（dependencies）
**** Package 2
***** Rule 1
***** Process 1
***** Data Object 1
***** Test 1

== Creating Organization Unit, repository, project and package⌘。 ==
[[File:Jbpm orgaizing konwoledge.png|300px]]
# Creating Organizational Unit
## Authoring/Administration
## Organisation Units/Manage Organisation Units/Add
## Name: '''npou''' / Owner: NobleProg Ltd
# Creating Repository
## Authoring/Administration
## Repositories/New Repository
## Repository Name: '''nprep'''/Organisational Unit: '''npou'''
# Creating Project
## Authoring/ Project Authoring
## New Item/Project
## Resource Name: '''npproj1'''
## Group ID: '''nppack''' <- THIS IS VERY IMPORTANT

== Hello World ⌘。==
* New Item -> New DRL file
** Name: Hello World
** Package: nppack
* Paste 粘贴
rule "Hello World"
when
eval(true)
then
System.out.println("Hello world");
end
* Save the rule 保存规则

;Testing Hello World Rule 测试规则
* New Item -> Test Scenario
** Name: Hello World Test
* Check the log files 查看日志
** e.g. 例如
cd /opt/jbpm-installer/wildfly-8.2.1.Final/standalone/log
tail server.log -f

== Apply Discount 打折 ==
=== Creating a Fact Type 新建一个 Fact Type (Data Object) ⌘。===
<div style="color:red">MAKE SURE YOU ARE IN npou/nprep/npproj1</div>

* New Item/Data Object
** Identifier ShoppingCart
** Label: Shopping Cart
** Package: nppack
::[[File:ClipCapIt-160823-145024.PNG|300px]]
* Create new field 新建 Field
** Id: totalPrice
** Label: Total Price
** Type: BigDecimal
::[[File:DroolsNewField.png | 300px]]
* Save (upper right corner) 保存 (右上角)

=== Looking at generated POJO ⌘。 ===
* Source
<source lang="java">
package nppack;

/**
* This class was automatically generated by the data modeler tool.
*/

public class ShoppingCart implements java.io.Serializable
{

static final long serialVersionUID = 1L;

@org.kie.api.definition.type.Label(value = "Total Price")
private java.math.BigDecimal totalPrice;

public ShoppingCart()
{
}

public java.math.BigDecimal getTotalPrice()
{
return this.totalPrice;
}

public void setTotalPrice(java.math.BigDecimal totalPrice)
{
this.totalPrice = totalPrice;
}

public ShoppingCart(java.math.BigDecimal totalPrice)
{
this.totalPrice = totalPrice;
}

}
</source>

=== Creating a Rule 新建一个规则。⌘===
:Rule: If customer buys more than 10k, apply 10% discount
:规则：如果客户买的东西超过一万元，打九折

* New Item -> Guided Rule
* Resource Name: '''Apply Tall Order Discount'''
* Enter details as below 输入下面的信息
[[File:ApplyDiscountRule.png|400px]]

* View Source should return 查看源代码
package nppack;
import java.lang.Number;
rule "Apply Tall Order Discount"
dialect "mvel"
when
$sc : ShoppingCart( $tp : totalPrice >= 10000B )
then
$sc.setTotalPrice( $tp*0.9 );
update( $sc );
end

=== Creating a Test Plan 。⌘===
* New Item-> Test Scenario
* Resource Name:Apply Discount Test
* Run Scenario
[[File:ApplyDiscountTestPlan.png|400px]]

== Dealing with Recursion 递归。⌘==
* Let us try to add a test for order value of 15000 and set EXPECT section to 13500
: 试着为价格是15000元的订单添加一个test，并设定它的EXPECT为13500元
[[File:ApplyDiscountRuleRecusion.png|400px]]

=== No-Loop Attribute ⌘===
We need to add no-loop attribute<br />
添加 no-loop 属性

[[File:ApplyDiscoutRuleRecursiveNoLoop.png|400px]]
<source>
package nppack;

import java.lang.Number;

rule "Apply Tall Order Discount"
no-loop true <-------
dialect "mvel"
when
$sc : ShoppingCart( $tp : totalPrice <= 10000B )
then
modify( $sc ) {
setTotalPrice( $tp*0.9 )
}
end
</source>

* Test correct test should look like that
: 测试通过，会显示
[[File:ApplyDiscountRecursiveTest.png|400px]]

== Exercises ⌘。==
'''Exercise 1.4'''
# to the shopping cart fact type add "discountRate" field, <br />在购物车 fact type 里增加 "discountRate" field
# add rule to populate it accordingly rather than change totalPrice field directly<br/>添加新计算totalPrice的规则，不要直接改变totalPrice field
# create a test 添加测试
'''Exercise 1.5'''
# to the shopping cart fact type add "totalPriceAfterDiscount" field, <br />在购物车 fact type 里增加 "totalPriceAfterDiscount" field
# add rule to calculate total price<br />添加计算总价格的规则
# add a test 添加测试
'''Exercise 1.6''' (optional - don't do it unless you ask to)
* to the shopping cart fact type add "discountApplied:Boolean" field, <br />在购物车 fact type 里增加 "discountApplied:Boolean" field,
* set it to true after applying a discount <br />在应用折扣后设定为 true
* modify rule so it will work without no-loop or other attributes<br />修改规则使得规则在没有no-loop或其他属性时一样工作
* discuss why 讨论

== Next Module ==
[[Drools Kie - Decision Table]]

Drools Kie - Example - Revision history

Bernard Szlachta: /* Exercises ⌘。 */