在 sling servlet 中调用除 doGet 或 doPost 之外的不同方法

Question

I am new to Sling framework. Is there any way we can call different methods.

For ex - on Page I have add,delete, edit button so apart from creating three files i can create three methods(add, delete,update) in same file.

Please suggest.

I tried by changing the method name

@Property(name = "sling.servlet.methods", value = { "getData" })

But it is not working

@Service
@Properties({
    @Property(name = "sling.servlet.paths", value = { "getData" }),
    @Property(name = "sling.servlet.methods", value = { "GET" })
     })
public class getData extends SlingAllMethodsServlet {

Answer 1

The SlingAllMethodsServlet will support any of the valid HTTP verbs as methods and in response to a request will call the appropriate do method. For instance, in response to a PUT request the doPut method will be called.

In your case if you wanted your servlet to support both getting data and creating new data, you would want to allow methods GET and POST and implement the doGet and doPost methods.

@Service
@Properties( {
    @Property(name = "sling.servlet.paths", value = { "/getData" } ),
    @Property(name = "sling.servlet.methods", value = { "GET", "POST" } )
    } )
public class DataServlet extends SlingAllMethodsServlet {

    @Override
    protected void doPost(SlingHttpServletRequest request, SlingHttpServletResponse response) { ... }

    @Override
    protected void doGet(SlingHttpServletRequest request, SlingHttpServletResponse response) { ... }

}

To add delete and edit support as well you would simply need to support the DELETE and PUT HTTP verbs along with implementing the doDelete and doPut methods in your servlet.

A tangentially related note - by using the @SlingServlet annotation in place of the @Service and @Component annotations you can shorten the code a bit and get better autocompletion and documentation support.