Is this possible to get .model.json from content path in Java class instead of hitting absolute url and get response? | Community
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A
ashokkumarmarni
Level 2
August 13, 2019
Solved

Is this possible to get .model.json from content path in Java class instead of hitting absolute url and get response?

  • August 13, 2019
  • 7 replies
  • 4447 views

Hi All,

Is there a way to get the /content/my-project/mypage.model.json directly from content path within AEM OSGI service, instead of hitting absolute url http://localhost:4502/content/my-project/mypage.model.json

We do get html of a page with below code snippet

HttpServletRequest httpRequest = requestResponseFactory.createRequest("GET", location);

HttpServletResponse httpResponse = requestResponseFactory.createResponse(out);

requestProcessor.processRequest(httpRequest, httpResponse, resourceResolver);

Is there a way to get the model.json as well similar to above logic?

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    Best answer by ashokkumarmarni

    Hi Jörg Hoh,

    Thank you for your support !

    We have modified sling model adaptables to both request and resource to make sure it works for both. We are able to read required values from sling model as below.

    Resource r = resourceResolver.getResource("/content/myproject/mypage");

    MyModel model = ModelFactory.createModel (r, MyModel.class);

    MyModel model = ModelFactory.createModel (r, MyModel.class);

    JSONObject completeObj = new JSONObject();

    completeObj.put("title", model.getTitle());

    Map<String, ComponentExporter> componentMap = (Map<String, ComponentExporter>) model.getExportedItems();

    Set<String> childKeyList = model.getExportedItems().keySet();

    JSONArray keys = new JSONArray();

    for (String childKey : childKeyList) {

        keys.put(((ChildModelImpl) componentMap.get(childKey)).getElements());

    }

    completeObj.put("items", keys);

    modelJson = completeObj.toString();

    7 replies

    joerghoh
    Adobe Employee
    joerghohAdobe Employee
    Adobe Employee
    August 13, 2019

    You don't to create a request to get that data, there is a much smoother way to get the model object backing this JSON, see [1].

    It can look like this:

    Resource r = resourceResolver.getResource("/content/myproject/mypage");

    MyModel model = ModelFactory.createModel (r, MyModel.class);

    with MyModel being the Model class.

    [1] Apache Sling :: Sling Models
      A
      ashokkumarmarniAuthor
      Level 2
      August 15, 2019

      Hi Jörg Hoh,

      I have tried above approach, I am ending up with below exception

      Caused by: org.apache.sling.models.factory.PostConstructException: Post-construct method has thrown an exception for model class myproject.slingmodels.core.PageImpl

      at org.apache.sling.models.impl.ModelAdapterFactory.createObject(ModelAdapterFactory.java:705)

      at org.apache.sling.models.impl.ModelAdapterFactory.internalCreateModel(ModelAdapterFactory.java:394)

      at org.apache.sling.models.impl.ModelAdapterFactory.createModel(ModelAdapterFactory.java:261)

      Caused by: java.lang.NullPointerException

      at myproject.slingmodels.core.PageV1Impl.initModel(PageV1Impl.java:69)

      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

      at java.lang.reflect.Method.invoke(Method.java:498)

      at org.apache.sling.models.impl.ModelAdapterFactory.invokePostConstruct(ModelAdapterFactory.java:896)

      at org.apache.sling.models.impl.ModelAdapterFactory.createObject(ModelAdapterFactory.java:703)

      ... 176 more

      NullPointerException is because of null values in below variable in myproject.slingmodels.core.PageImpl

          @ScriptVariable

          protected com.day.cq.wcm.api.Page currentPage;

         

          @Self

          private SlingHttpServletRequest request;

      are we missing anything since browser based access is working and not through code

      joerghoh
      Adobe Employee
      joerghohAdobe Employee
      Adobe Employee
      August 15, 2019

      In your case it seems that your model can only be adapted from the request itself. I always prefer the adaptions via the resource, unless you need specifics of the request object itself.

      In your case it should look like:

      MyModel model = ModelFactory.createModel (request, MyModel.class);

      A
      ashokkumarmarniAuthor
      Level 2
      August 19, 2019

      Hi Jörg Hoh,

      Thank you for your response.

      We are able to get the sling model objet from above approach, is there a way to get the json string out of model object in our java class?

      joerghoh
      Adobe Employee
      joerghohAdobe Employee
      Adobe Employee
      August 19, 2019

      not that easy, but you need to run it to the Jackson serializer. I don't have sample code ready, sorry. But at [1] is the Sling implementation for this, maybe this helps.

      [1] sling-org-apache-sling-models-jacksonexporter/JacksonExporter.java at master · apache/sling-org-apache-sling-models-jack…

      A
      ashokkumarmarniAuthorAccepted solution
      Level 2
      August 23, 2019

      Hi Jörg Hoh,

      Thank you for your support !

      We have modified sling model adaptables to both request and resource to make sure it works for both. We are able to read required values from sling model as below.

      Resource r = resourceResolver.getResource("/content/myproject/mypage");

      MyModel model = ModelFactory.createModel (r, MyModel.class);

      MyModel model = ModelFactory.createModel (r, MyModel.class);

      JSONObject completeObj = new JSONObject();

      completeObj.put("title", model.getTitle());

      Map<String, ComponentExporter> componentMap = (Map<String, ComponentExporter>) model.getExportedItems();

      Set<String> childKeyList = model.getExportedItems().keySet();

      JSONArray keys = new JSONArray();

      for (String childKey : childKeyList) {

          keys.put(((ChildModelImpl) componentMap.get(childKey)).getElements());

      }

      completeObj.put("items", keys);

      modelJson = completeObj.toString();

      joerghoh
      Adobe Employee
      joerghohAdobe Employee
      Adobe Employee
      August 23, 2019

      Glad you made it work.

      Jörg

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