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Jai1122
Jai1122
Level 4
October 16, 2015
Solved

Sling Servlets

    Hi All,

        Can someone please tell me what is the difference between SlingAllMethodsServlet  and SlingSafeMethodServlet ?

We use them when writing servlets but i am not sure which should be given preference.

Thanks

Jai

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Lokesh_Shivalingaiah
Lokesh_ShivalingaiahAccepted solution
Level 10
October 16, 2015

Hi Jai,

Basically, SlingAllMethodsServlet is another layer of interface which extends SlingSafeMethodServlet which has doPost, doDelete and doPut operations for the request, response.

Refer [1] and [2] for more details on each interface

[1] https://sling.apache.org/apidocs/sling5/org/apache/sling/api/servlets/SlingSafeMethodsServlet.html

[2] https://sling.apache.org/apidocs/sling5/org/apache/sling/api/servlets/SlingAllMethodsServlet.html

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4 replies

Jai1122
Jai1122Author
Level 4
October 16, 2015

Thanks a ton for the responses!!!

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Ratna_Kumar
Ratna_Kumar
Level 10
October 16, 2015

Hi Jai,

In Addition to that, also please check this development article that based on SlingAllMethodsServlet:

Submitting Adobe CQ form data to Java Sling Servlets: https://helpx.adobe.com/experience-manager/using/custom-sling-servlets.html.

For deeper understanding of Sling in AEM, please go-through the recorded May session of ASK the AEM Experts: http://scottsdigitalcommunity.blogspot.com/2015/05/may-session-of-aem-ask-community-experts.html , that will cover sling concepts in depth.

Thanks,
Ratna Kumar.

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Adobe Employee
ogillAdobe Employee
Adobe Employee
October 16, 2015

Hi Jai, 

to add to the reply from bsloki, if your servlet will only ever be called with GET requests, then use SlingSafeMethodsServlet. If your servlet will be called with POST(and GET) requests, then use SlingAllMethodsServlet. 

From the documentation: 

SlingSafeMethodsServlet: Helper base class for read-only Servlets used in Sling

SlingAllMethodsServlet: Helper base class for data modifying Servlets used in Sling

 

Basically, if your servlet is not modifying anything in the repository, then use SlingSafeMethodsServlet.

Regards,

Opkar 

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Lokesh_Shivalingaiah
Lokesh_ShivalingaiahAccepted solution
Level 10
October 16, 2015

Hi Jai,

Basically, SlingAllMethodsServlet is another layer of interface which extends SlingSafeMethodServlet which has doPost, doDelete and doPut operations for the request, response.

Refer [1] and [2] for more details on each interface

[1] https://sling.apache.org/apidocs/sling5/org/apache/sling/api/servlets/SlingSafeMethodsServlet.html

[2] https://sling.apache.org/apidocs/sling5/org/apache/sling/api/servlets/SlingAllMethodsServlet.html

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