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How to use/understand AEM Sling Resource Merger, override and Overlay concepts.

Forum|Forum|9 years ago
January 17, 2017
5 replies
5070 views

Am trying to understand the AEM Sling Resource Merger concept. As per the Adobe docs examples Override (Configuring your Page Properties), Overlay (Customizing the Consoles (touch-optimized UI)), am getting confused how to use this, can any one explain with simple component to understand it in more better way.

Kk

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Best answer by Ratna_Kumar

Hi,

Sling resource merger is introduced in AEM 6.x and basically same as Override.

//Overlay:

It is based on saerch paths(/libs + /apps)
Need to copy the whole subtree
All the properties are duplicated
When upgrades are done to the /libs folder, these changes have to be manually recreated under /apps.

//Sling Resource Merger/Override:

Sling resource merger is based on Resource Type Hierarchy.
It extends within an almost empty subtree
Only required properties are overlaid.
As properties are not copied, only the structure, upgrades are automatically reflected in /apps

//See this Adobe docs for more info: https://docs.adobe.com/docs/en/aem/6-2/develop/platform/sling-resource-merger.html

Hope this helps!!

Thanks,
Ratna Kumar.

smacdonald2008

Level 10

All overlay refers to is to take an existing component from under /libs and drop to /apps/<YOUR PROJECT>/components. Then change the Title property (maybe other propertues too) so its a unique name. Then modify the application logic to meet your needs. Never directly change components under /libs. Hope this helps.

K

KkkrishAuthor

Level 4

smacdonald2008 wrote...

All overlay refers to is to take an existing component from under /libs and drop to /apps/<YOUR PROJECT>/components. Then change the Title property (maybe other propertues too) so its a unique name. Then modify the application logic to meet your needs. Never directly change components under /libs. Hope this helps.

Thanks Scott,

Then what is the concept of AEM Sling Resource Merger how to use it? what is the /mnt/override and /mnt/overlay i see the touch UI url for Asset editor like below where the "/mnt/overlay/" is having any specific actions to do in the url .?

"http://localhost:4502/mnt/overlay/dam/gui/content/assets/metadataeditor.html?item=%2Fcontent%2Fdam%2Fprojects%2Foutdoors%2Fcover&_charset_=utf8"

Thanks in advance

Kk

Ratna_KumarAccepted solution

Level 10

Hi,

Sling resource merger is introduced in AEM 6.x and basically same as Override.

//Overlay:

It is based on saerch paths(/libs + /apps)
Need to copy the whole subtree
All the properties are duplicated
When upgrades are done to the /libs folder, these changes have to be manually recreated under /apps.

//Sling Resource Merger/Override:

Sling resource merger is based on Resource Type Hierarchy.
It extends within an almost empty subtree
Only required properties are overlaid.
As properties are not copied, only the structure, upgrades are automatically reflected in /apps

//See this Adobe docs for more info: https://docs.adobe.com/docs/en/aem/6-2/develop/platform/sling-resource-merger.html

Hope this helps!!

Thanks,
Ratna Kumar.

K

KkkrishAuthor

Level 4

Thanks Ratna,

I have tried to use this OVERLAY concept for the default form DAM Asset Editor, but it doesn't work as expected. Did i miss something.?

Have created another ticket for the same.

~Kk

kautuk_sahni

Community Manager

Kkkrish wrote...

Thanks Ratna,

I have tried to use this OVERLAY concept for the default form DAM Asset Editor, but it doesn't work as expected. Did i miss something.?

Have created another ticket for the same.

~Kk

I am closing this thread as the primary questions got answered by Ratna. For other question created, experts will try to answer on new thread.

~kautuk

Kautuk Sahni

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