I need to export content fragments to target through custom workflow

Question

I have a project where content fragments need to be automatically exported as JSON to a target location upon creation via a custom workflow. The JSON format should match what is generated when accessing the URL: http://localhost:4502/api/assets/contentfragment.model.json.However, I am facing an issue where I can't replicate the exact JSON format needed for export. Despite my efforts with the code below, the resource resolver is unable to recognise the resource at api/assets.Resource modelJsonResource = resolver.getResource("http://localhost:4502/api/assets/contentfragment.model.json");
            if (modelJsonResource != null) {                InputStream jsonContent = modelJsonResource.adaptTo(InputStream.class);
                if (jsonContent != null) {                                        sendToTarget(jsonContent);
                }
            }Could someone help me achieve the expected JSON output?

konstantyn_diachenko · Accepted Answer

Thank you @konstantyn_diachenko . Finally I was able to resolve all the exceptions and getting the json output. But the output is not exactly like the api/assets json format.

Hi @harshak11490245 ,

Okay, got it. So, you can send request to AEM publisher/dispatcher from AEM using HTTP client.

@Component
public class MyHttpClient {

    @OSGiService
    private HttpClientBuilderFactory httpClientBuilderFactory;

    public void executeHttpRequest() {
        try (CloseableHttpClient httpClient = httpClientBuilderFactory.newBuilder().build()) {
            // Perform HTTP operations with httpClient
            HttpGet httpGet = new HttpGet(aemHost 
 + "/api/assets/contentfragment.model.json");
            getRequest.addHeader("Content-Type", "application/json");

            CloseableHttpResponse response = httpClient.execute(getRequest);
            int statusCode = response.getStatusLine().getStatusCode();
            String jsonString = response.getEntity() == null
                        ? "" : IOUtils.toString(response.getEntity().getContent(), StandardCharsets.UTF_8);
            // process JSON string

        } catch (IOException e) {
            // Handle exceptions
        }
    }
}

NOTE: you need to properly get AEM host.

Best regards,

Kostiantyn Diachenko.

konstantyn_diachenko · Answer

Hi @harshak11490245 ,

Your resource resolver can't recognize URL. You should find content fragment by path e.g. /content/dam/wknd-shared/en/adventures/napa-wine-tasting/napa-wine-tasting, adapt to ContentFragment model and export it with Jackson exporter.

Below you can find a code an example of OSGi component how to get Content Fragment in JSON programmatically:

@Component
public class CfConverter {
   @Reference
   private org.apache.sling.models.factory.ModelFactory modelFactory;

   public String exportCfInJSON(ResourceResolver resourceResolver, String cfPath) {
       Resource cfResource = resourceResolver.getResource(cfPath);
       if (cfResource == null) {
           return null;
       }
       ContentFragment model = cfResource.adaptTo(com.adobe.cq.dam.cfm.ContentFragment.class)
       if (model == null) {
           return null;
       }
       return modelFactory.exportModel(model, 'jackson', String.class, Map.of());
   }
}

Best regards,

Kostiantyn Diachenko.

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