Highlighted

what is the best approach? Servlet or Node

keerthid7215849

21-02-2018

As of now, we have a list of people as a node for each person in jcr. We are trying to get all the people names in a drop-down using a servlet.

But, we can also create a node with a property holding the all the names as a json and call the property value in node instead of calling a servlet every time when we use it.

Also, I need to update the JSON value in this node whenever a new name added or existing name deleted.

I'm not sure about which approach I need to implement. servlet or creating a node that hold names.

Please suggest with pros and cons.

,

Replies

Highlighted

smacdonald2008

21-02-2018

Where are you trying to display the list - in an AEM component displayed in a web page? Or a component dialog Select field? Please provide more details.

Highlighted
Highlighted

cquser1

22-02-2018

Hi,

Just a thought.

In one of our implementations we had used the servlet approach.

Based on what you mentioned "But, we can also create a node with a property holding the all the names as a json....Also, I need to update the JSON value in this node whenever a new name added or existing name deleted".

So, to get all the names of users in json format in a node:

1] You are planning to write a listener that will be watching for any addition/deletion to the users area and update the json information in a node?

Probably this can also be done without much of a performance issue. Just that the logic needs to be in place to handle the incremental additions/deletions to the user list and any modifications.

Highlighted

smacdonald2008

22-02-2018

Follow this:

Select fields.png

Here is an example procudure to add a Select field to an existing Touch UI Dialog and populate it with nodes - as shown above:

Perform these tasks:

1 Select the node at:

/apps/Lab2018/components/content/firstcomponent/cq:dialog/content/items/herotext/items/column/items.

  1. Right click and select Create, Create Node. Enter the following values:

•    Name: type

•    Type: nt:unstructured

  1. Click on the following node: /apps/Lab2018/components/content/firstcomponent/cq:dialog/content/items/herotext/items/column/items/ type.
  2. Add the following properties to the type node:

•    fieldDescription (String) - Select Size

  • fieldLabel (String) - Size

•    name (String) - ./size (you reference this value to read this value of this component field)

•    sling:resourceType (String) - granite/ui/components/coral/foundation/form/select

  1. Select the node at:

/apps/Lab2018/components/content/firstcomponent/cq:dialog/content/items/herotext/items/column/items/type.

  1. Right click and select Create, Create Node. Enter the following values:

•    Name: items

•    Type: nt:unstructured

  1. Select the node at:

/apps/Lab2018/components/content/firstcomponent/cq:dialog/content/items/herotext/items/column/items/type/items.

  1. Right click and select Create, Create Node. Enter the following values:

•    Name: small

•    Type: nt:unstructured

  1. Add the following properties to the small node:

•    text (String) - small

•    value (String) – small

  1. Click on the following node: /apps/Lab2018/components/content/firstcomponent/cq:dialog/content/items/herotext/items/column/items/ type.
  2. Right click and select Create, Create Node. Enter the following values:

•    Name: medium

•    Type: nt:unstructured

12 Add the following properties to the medium node:

•    text (String) - medium

•    value (String) – medium

  1. Click on the following node: /apps/Lab2018/components/content/firstcomponent/cq:dialog/content/items/herotext/items/column/items/ type.
  2. Right click and select Create, Create Node. Enter the following values:

•    Name: large

•    Type: nt:unstructured

15 Add the following properties to the large node:

•    text (String) - large

•    value (String) - large

Highlighted

pratekumar

22-02-2018

If you are trying to display the list in a component dialog then you need to write a servlet/datasource. It will automatically change values if you delete something from the nodes.