Create servlet

Last update: March 25, 2025
  • Applies to:
  • Experience Manager 6.4
  • Experience Manager 6.5

CREATED FOR:

  • Experienced
  • Developer

Next step is to create a servlet that calls the appropriate methods of our custom OSGi service. The servlet has access to the adaptive form data, file attachments info. The servlet returns a unique application id that can be used to retrieve the partially completed adaptive form.

This servlet is invoked when the user clicks the Save and Exit button on the adaptive form

package saveandresume.core.servlets;

import java.io.PrintWriter;

import javax.servlet.Servlet;
import org.apache.sling.api.SlingHttpServletRequest;
import org.apache.sling.api.SlingHttpServletResponse;
import org.apache.sling.api.servlets.SlingAllMethodsServlet;
import org.osgi.service.component.annotations.Component;
import org.osgi.service.component.annotations.Reference;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import com.saveAndResume.core.SaveAndFetchDataFromDB;

@Component(service = {
  Servlet.class
}, property = {
  "sling.servlet.methods=post",
  "sling.servlet.paths=/bin/storeafdatawithattachments"
})
public class StoreDataInDBWithAttachmentsInfo extends SlingAllMethodsServlet {
  private Logger log = LoggerFactory.getLogger(StoreDataInDBWithAttachmentsInfo.class);
  private static final long serialVersionUID = 1 L;
  @Reference
  SaveAndFetchDataFromDB saveAndFetchFromDB;

  public void doPost(SlingHttpServletRequest request, SlingHttpServletResponse response) {
    final String afData = request.getParameter("data");
    final String tel = request.getParameter("mobileNumber");
    log.debug("$$$The telephone number is  " + tel);
    log.debug("The request parameter data is  " + afData);
    try {
      JsonObject fileMap = JsonParser.parseString(request.getParameter("fileMap")).getAsJsonObject();
      log.debug("The file map is: " + fileMap.toString());
      String newFileMap = saveAndFetchFromDB.storeAFAttachments(fileMap, request);
      String application_id = saveAndFetchFromDB.storeFormData(afData, newFileMap, tel);
      log.debug("The application id:  " + application_id);
      JsonObject jsonObject = new JsonObject();
      jsonObject.addProperty("applicationID", application_id);
      response.setContentType("application/json");
      response.setHeader("Cache-Control", "nocache");
      response.setCharacterEncoding("utf-8");
      PrintWriter out = null;
      out = response.getWriter();
      out.println(jsonObject.toString());
    } catch (Exception ex) {
      log.error(ex.getMessage());
    }
  }

}

Next Steps

Render form with saved form data

Previous page4 - Store Form Data
Next page6 - Render form with saved data

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