ATG Interview Questions

Interview Questions related to ATG :

Q)How to create Component?

A) we can create it in 2 ways,

I) using ACC

II)by creating java+properties file in our module/Eclipse

Q)how to create custom Repository?

a)we have to create component/properties file

$class=atg.adapter.gsa.GSARepository

$scope=global

XMLToolsFactory=/atg/dynamo/service/xml/XMLToolsFactory

dataSource=/atg/dynamo/service/jdbc/JTDataSource

definitionFiles=/com/my/myRepository.xml

idGenerator=/atg/dynamo/service/IdGenerator

transactionManager=/atg/dynamo/transaction/TransactionM

anager

Explanantion : have to tell all the properties in our component

Class is GSARepository OOTB it will do all oprations getitem, getiteforupdate

XMLToolsFactory : for parsing xml

definitionFiles : items info will keep here

idGenerator : for generating unique ids

transactionManager : for transation purpose either to commit or roll back i particular transaction/task

Q)How the module dependency happened in ATG ?

A)DAS DPS DSS DCS : from left to right

We maintained it in MANIFEST.MF file

Manifest-Version: 1.0

ATG-Config-Path: config/

ATG-Required: DAS DPS DSS DCS DAS

ATG-J2EE: j2ee-apps/testJ2ee

ATG-EAR-Module: j2ee-apps/testJ2ee

ATG-Class-Path: bin

Q)how the ATG will understand/initialize the components mean from which

path?

in MANIFEST.MF file we have to mention the ATG-Config-Path from here

ATG will pick the components and it will initialize.

Q)Scopes in ATG?

A) mainly we have 3 types of Scopes

1. Request

2. Session

3. Global

Global is the default scope

Every Nucleus component has a $scope property that controls the number of instances of the bean. You can specify scope (global, session, or request) when you create or edit a component 

Global :If a component has a global scope, there is one instance of the component for all users. (This means that the state of the component is the same for all users of the application.)

Session :If a component has a session scope, then every user gets a separate copy of the component that persists for the duration of that user's session. 

Request:If a component has a request scope, then simultaneous requests will each see a different copy of the component. This is true even if two requests from the same session come in at the same time.

Q)what is Nucleus?

A)first as component it will act then after its initialization over

it will act as Container to initialize all the components

Q)Differences between the item-type and Component-item-type in

definition(xml)file?

A)

i)When your property in the item-descriptor needs

to hold only one value which is of type of any other repository

item, use 'item-type=”item name”' attribute.

ii)when your property needs to hold a collection

(set/array/map/list) of items of type of any other repository item,

use data-type = "set/array/map/list" and

component-item-type=”another Item name” to specify what type each

one of the element in the collection

Ex : 

i)<item name=”student” >

        <propety name=”std name” item-type=”name” />

     </item>

<item name=”name”>

     <proeprty name=”student name”/>

</item>

ii)<item name=”student” >

    <propety name=”std classes” data-type=”set”component-item-type=”classes”/>

   </item>

  <item name=”classes”>

<proeprty name=”class name”/>

<proeprty name=”section name”/>

<proeprty name=”teachers name”/>

   </item>

Q)How connection will give from ATG module to DB

A)/atg/dynamo/service/jdbc/JTDataSource.properties

Using JTDataSource component will maintain the Schema/DB connection

Q)What are all the OOTB formhandlers you used in your application tell me 6?

A)mainly i used in my application level

i)CartModifierFormHandler

ii)PaymentGroupFormHandler

iii)ShippingGroupFormHandler

iv)CommitOrderFormHandler

v)GenericFormHandler

vi)ProfileFormHandler

Q)To write custom Droplet which OOTB class you will extend?

A) DynamoServlet we have to extend as a super class.

Q)How to write a Simple component not a droplet and from handler?

A)We have to write properties file and respective Java class.that class

will contain only fields and getters&setters,it should extends

GenericService

Q)How you will get a parameter in droplet which you give/assign it

in Jsp level.

A)by using getparameter() method

Q)which class will extend by every class in our ATG layer like object

class in Java.

A)here also Object class is the super most class, and every class will

extends GenericService

Q)How can i resolve/initialize a particular component with out

injecting in any component.

A)ATG provides one method resolveName(component name we have to provide)

in GenericService class using it we can initialse the componenet.

Q)What are all the input parameters for ForEach Droplet?

A)array,elementName,indexName....

Q)How we can achive Inheritence in ATG Repository level?

A)

sub-type-property="type"

super-type=”super item”

Ex : <item-descriptor name="shippingGroup" sub-type-property="type" />

<item-descriptor name="hardgoodShippingGroup" super-type="shippingGroup" />

Here hardgoodShippingGroup is the subitem(like class) shippingGroup is the super Item(class)

Hence all the features/properties of shippingGroup we can get it in hardgoodShippingGroup

item also.

Q)when or in which scenario i will go for ItemLookupDroplet?

A)to get complete item by providing id as a input parameter to that

droplet

ex : 
mylookup.properties

$class=atg.repository.servlet.ItemLookupDroplet

itemDescriptor=stdinfo

repository=/com/my/MyForm1Repository

Mylookup.jsp

<dsp:droplet name="/com/my/StudentLookUp">

       <dsp:param name="id" param="stdid"/>

               <dsp:param name="element" name="stdInfo"/>

                   <dsp:oparam name="output">

                             student id : <dsp:valueof param="element.stdid" />

                             student name : <dsp:valueof param="element.studentname" />

                  </dsp:oparam>

</dsp:droplet>

Here by passing id(studentid) as input parameter i am getting student

item(what ever i mentioned in component level

itemDescriptor=stdinfo)here stdinfo is an item which is having other

properties stdid and studentname.

Q)If i want to make one repository property as no Not Null what i have

to do?

A)To make it one property as a Not NULL in repository level i will

make it as required=true

ex:
<property name="textKey" column-name="text_key" data-type="string" required="true" />

Q)if i want to make a relation multi how many table i have to create

in repository level?

A)we have to make sure that, three tables are required

i)one is primary table

a)it will contain multi table

ii)reference for the multi table

ex :
<item-descriptor name="state">

    <table name="stateInfo" id-column-name="stateid" type="primary">

     <property name="stateid" column-name="STATE_ID"

    <property name="statename" column-name="STATE_NAME" data-type="String">

    </table>

    <table name="state_cities" id-column-name="stateid" type="multi">

     <property name="cities" column-name="CITIES" data-type="set" component-item-type="city"/>

   </table>

</item-descriptor>

<item-descriptor name="city" >

     <table name="cityInfo" id-column-name="cityid" type="primary">

        <property name="cityid" column-name="CITY_ID"   data-type="String"/>

       <property name="cityname" column-name="CITY_NAME" data-type="String"/>

    </table>

</item-descriptor>

Explanation : here i am doing state contain multiple cities,to achive

this i am using multi table concept by creating 3 table

Q)I created my repository but i am unable to see it in ACC/BCC to

create/modify/remove a particular item in my Repository,to achieve

this what i have to do?

A)in ContentRepositories.properties component we have to map/add our own custom repositor

to the property initialRepositories then only we can able to do see/create/update/remove

our items which are presented in our custom repository.

ex: ContentRepositories.properties

initialRepositories+=/com/myown/MyRepository,

Q)When Nucleus started/initialize that time i want to initialize some

of my custom components how we can do it?

in Initial.properties component we have to mention/map/add our custom component to

initialServices property

Ex : 
/atg/dynamo/Initial.properties

initialServices+=/atg/dynamo/service/ServerLockManager,\

Commerce Questions:

Q)when the order object will create?

A) when ever we calling ShoppingCart.current the will get current

order

Q)How to create our own/custom CommerceItem?

A)

Explanation : orderrepository.xml

Step 1: 
 have to customize in item in orderrepository.xml

<item-descriptor name="commerceItem" >

     <table name="my_commerce_item" type="auxiliary" id-column-         name="commerce_item_id">

            <property name="myproperty1" column-name="MYPROPERTY1" data-type=”String” />

            <property name="myproperty2" column-name="MYPROPERTY2"

data-type=”String” />

      </table>

<item-descriptor>

commerceItem item is there in OOTB level the same we are using but

we are creating auxiliary table(to add our custom properties) by giving

reference of OOTB primary table id using

id-column-name=commerce_item_id

Step2 : 
Mapping is required in /atg/commerce/order/OrderTools.properties

OrderTools.properties

beanNameToItemDescriptorMap+=com.common.commerce.order.MyCommerce

ItemImpl\=commerceItem

commerceItemTypeClassMap+=default\=com.common.commerce.order.MyCo

mmerceItemImpl

In OrderTools component we have to mapping item what ever we did in repository level with the JavaBean class.

beanNameToItemDescriptorMap : javaBean to ItemDescriptor mapping

commerceItemTypeClassMap : commerceItemType(commerceItem we did

in repository) to Class Mapping

Step3 :
 the JavaBean class what ever we created it must Extend the

CommerceItemImpl OOTB class

public class MyCommerceItemImpl extends CommerceItemImpl{

Fields(myproperty1,myproperty2) and respective getters/setters.

}

What ever the values we are setting to myproperty1,myproperty2 it will

set in CommerceItem level in order.

Step4 : How to set values to our custom CommerceItem

MyCartModifierFormHandler.java

             List<CommerceItem> commerceItems = order.getCommerceItems();

            for (CommerceItem commerceItem : commerceItems) {

                         if (commerceItem instanceof CommerceItemImpl){

                               commerceItemImpl = (MyCommerceItemImpl)commerceItem;

                               commerceItemImpl.setproperty(“myproperty1”,”some”);

                               commerceItemImpl.setproperty(“myproperty1”,”some”);

                         }

             }

Step5 : check the CommerceItem property in order level we will find

these two properties(in repository/DB level) also.

The same way we have to fallow for custom ConfigurableCommerceItem

and subSkuCommerceItem.

Q)Adding more items to CommerceItem is it possible?

A)No we can add only one type item(with more quantity) to order in

CommerceItem level, to achieve this mean add more items to order we

will go for ConfigurableCommerceItem concept instead of CommerceItem.

Q)How can i have to add an item as configurableCommerceItem to order?

A)have to call AddConfigurableItemToOrder() will use to add an item

to Order as a ConfigurableCommerceItem.

if you want to add an item as a commerceItem means will go for

AddItemToOrder() method in CartModifierFormHandler these methods are

available.

Q)How you can add subskuitem to order?

A)As a commerceItem we cant add more than one type of item,same type

of items we can add any number of items, but if we want to add different

type of items we have to go for ConfigurableCommerceItem.

For ConfigurableCommerceItem will add subskuitem.

EX :

 as a commerceItem :Computer(all peripherals from same vendor) is the CommerceItem

I can add to any number of items of type Computer

Ex: 

as a configurable commerce item :Computer(all peripherals from diff vendor) is the

ConfigurableCommerceItem,mean mouse is one item,keyboard is another

item(/Repository Item)

Code Snippet :

MyConfigurableCommerceItem configurableCommerceItem=MyConfigurableCommerceItem)

    getOrder.getCommerceItem(getconfigurableCommerceItemId());

    MySubSkuCommerceItem subSkuCommerceItem = (MySubSkuCommerceItem)

 getCommerceItemManager().createCommerceItem(“mousepointer”,“skuid”,null,”prod id”,null, “quantity”, null, null,null);

getCommerceItemManager().addSubItemToConfigurableItem(configurabl

eCommerceItem, subSkuCommerceItem);

Then the same configurable item will add to order by calling

AddConfigurableItemToOrder().

getconfigurableCommerceItemId() : will get it from jsp,by iterating

all commerceitems(mean we added configurableCommerceItem) from the

order level and will set it.

Q)How to add our own paymentGroup to order?

A)i will explain by taking GiftCard as a new PaymentMethod

Step1 : orderrepository.xml

<item-descriptor name="paymentGroup" xml-combine="append">

        <table name="dcspp_pay_group" type="primary">

        <property name="type" xml-combine="append" data-type="enumerated">

             <option value="giftCard" code="4" />

        </property>

        </table>

</item-descriptor>

<item-descriptor name="giftCard" super-type="paymentGroup" sub-type-value="giftCard">

         <table name="giftcardInfo" id-column-name="payment_group_id">

               <property name="giftcardNumber" column-name="gift_card_number"

                 display-name-resource="giftcardNumber" data-type="string"/>

               <property name="giftcardPin" column-name="gift_card_pin"

                display-name-resource="giftcardPin" data-type="string"/>

        </table>

</item-descriptor>

 Explanation : for the enumerated property of payment type i am adding one more

type using xml-combine="append",hence we added one more item of type

paymentGroup.

For that item/paymentgroup we added our required properties(numbr and

pin).

Step2 : OrderTools.proeprties

beanNameToItemDescriptorMap+=com.payment.GiftCard\=giftCard

paymentTypeClassMap+=\giftCard\=com.payment.GiftCard

Step3 : our custom payemnt method must extends PaymentGroupImpl

public class GiftCard extends PaymentGroupImpl{

public String mGiftcardNumber;

public String mGiftcardPin;

public String getGiftcardNumber() {

return (String) getPropertyValue("giftcardNumber");

} public void setGiftcardNumber(String pGiftcardNumber) {

setPropertyValue("giftcardNumber", pGiftcardNumber);

} public String getGiftcardPin() {

return (String) getPropertyValue("giftcardPin");

} public void setGiftcardPin(String pGiftcardPin) {

setPropertyValue("giftcardPin", pGiftcardPin);

}

}

PaymentGroupFormHandler.properties

MyPaymentGroupFormHandler.java

Maintain getters/setters for number and pin

handleGiftCardPayment(req,res){

        getPaymentGroupManager().removeEmptyPaymentGroups(getOrder());

        PaymentGroup paymentGroup =

                                        getPaymentGroupManager().createPaymentGroup("giftCard");

         paymentGroup.setPaymentMethod("giftCard");

        GiftCard giftcard = null;

         getPaymentGroupManager().addPaymentGroupToOrder(getOrder(), paymentGroup);

         List<PaymentGroup> paymentgroups = getOrder().getPaymentGroups();

                   for (PaymentGroup paymentGroup2 : paymentgroups) {

                            if(paymentGroup2 instanceof GiftCard){

                                   giftcard = (GiftCard) paymentGroup2;

                                   giftcard.setPropertyValue("giftcardNumber", getGiftcardNumber());

                                   giftcard.setPropertyValue("giftcardPin",getGiftcardPin());

                            }

                   }
     }

Mygiftcard.jsp

giftcardNumber:<dsp:inputbean="PaymentGroupFormHandler.giftcardNumber" type="text" />

giftCardPin:
<dsp:inputbean="PaymentGroupFormHandler.giftcardPin"/>

<dsp:inputbean="PaymentGroupFormHandler.giftCardPayment" type="submit"/>

Explanation : 
what ever we added(number and pin)in jsp as a input parameter we are setting to

PaymentGroupFormHandler,using getter method we get and setting into our payment

Method(giftcard),addPaymentGroupToOrder() using this method we are adding

custom payment method to Order.

The same way he have to fallow for adding custom Shipping Method also.


Q)Purchase process flow in ATG?
A)Home Page-->PDP Page--->Cart Page ---> shipping Page --> Payment Page --> Order View P Page --> Order Confirmation Page.


Q)What is CommerceItem?
A)CommerceItem is one of teh Repository Item in ATG,it will hold CatalogRefId,Quantity,PriceInfo,Auxiliary Data(ProdcutRef,CatalogRef,Product Id) of the item.

Q)What is Shipping Group?
A)ShippingGroup is one of the repository item(in Order Repository),it will hold the data Actual Ship Date,Description,Ship On Date,Shipping Group Class Type,Shipping Method, State,Submitted Date.

Mainly Contain,where the user want to ship the item what ever he purchased atg will maintain it in ShippingGroup.

Q)What is Payment Group?
Payment group is one of the repository Item in atg, it will hold data of Authorisation Status,Amount Credited||Debited||Authorised.

Q)How do you add an item to cart? 

Using addItemToOrder method of CartModifierFormHandler by passing catalogRefId, quantity and productId in the product details page. 

Q)How do you display items in the cart page? 

We will get the current order from the ShoppingCart component. We will pass the ShoppingCart.current.commerceItems to the ForEach droplet.

Q)How do you update the quantity of a commerce item in the cart page? 

we will call handleSetOrder method of CartModifierFormHandler to update the quantity

Q)How do u remove items from cart ? 

We will set the removalCommerceIds

To remove single item handleRemoveItemFromOrder method of CartModifierFormHandler.

Q)How do u proceed to checkout page? 

We will call to moveToPurchaseInfo method of the CartModifierFormHandler which will execute the moveToPurchaseInfo pipeline chain and check the order and commerce items and validates them.

Q)How do you set the shipping address to the order or shipping group?

 +We use the ShippingGroupDroplet to display all the available shipping addresses. 

+The ShipingGroupDroplet will get the available addresses from the Profile’s shipingAddress and secondaryAddresses properties.

 +Then the user will select the shippingAddress from the list. Then the selected address will be set the current shipping group by calling the handleApplyShippingGroups method of ShippingGroupFormHandler. 

+We can create a shipping group manually by using the ShippingGroupManager.createShippingGroup by passing the address. After that we call ShippingGroupManager.addShippingGroupToOrder method. +And we can get the available shippingGroup by order.getShippingGroups() 

The user will also select the shipping method and set to the shipping group such as NextDay , Two Day or Ground. 

+We will use AvailableShippingMethods droplet which fetches all the shipping methos names from the Shipping calculators. Each Shipping Calculator has a property called shiipingMethod.