ReadService for Non admin resource Resolver

ReadService.java

@Service
@Component(immediate=true)
public class ReadServiceImpl implements ReadService{

 private final Logger log = LoggerFactory.getLogger(getClass());

    @Reference
 private ResourceResolverFactory resolverFactory;
   
        //If you are planning to use repository session
        //@Reference
        //private SlingRespository repository;
        //private Session session = null;

    @Activate
 public void doAReadOperation(ComponentContext ctx) {
  Map<String, Object> param = new HashMap<String, Object>();
  param.put(ResourceResolverFactory.SUBSERVICE, "readService");
  ResourceResolver resolver = null;
  try {
   //Deprecated Method using admin resolver
                       //resolver = resolverFactory.getAdministrativeResourceResolver(null);
    resolver = resolverFactory.getServiceResourceResolver(param);
                        //If you are planning to use repository session instead of repository.loginAdministrative
                        //session = repository.getService("readService",null);
   log.info(resolver.getUserID());
   Resource res = resolver.getResource("/content/datatoreadandwrite/jcr:content");
   ValueMap readMap = res.getValueMap();
   log.info(readMap.get("jcr:primaryType", ""));
   ModifiableValueMap modMap = res.adaptTo(ModifiableValueMap.class);
   if(modMap != null){
    modMap.put("myKey", "myValue");
    resolver.commit();
    log.info("Successfully saved");
   }
  } catch (LoginException e) {
   log.error("LoginException",e);
  } catch (PersistenceException e) {
   log.error("LoginException",e);
  }finally{
   if(resolver != null && resolver.isLive()){
    resolver.close();
   }
                      //Close session if you are using session
  }
 }
}