In AEM, can you call a service from a WcmUsePojo using annotations ?

@fionas76543059 Usage of annotation where extending WCMUsePojo class not a right approach. Please refer below code snippet you may understand using WCMUsePojo 

Java

import javax.jcr.Node;

import org.demo.core.models.TextComponentModel;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.adobe.cq.sightly.WCMUsePojo;

public class TextComponent extends WCMUsePojo {

    private TextComponentModel model;

    @Override
    public void activate() throws Exception {
        try {
            log.info("Text Component 2.0 backend logic starts");
            /**
             * Initializing the model object to set the values
             */
            model = new TextComponentModel();
            /**
             * Getting the current node from the resource object which is available in Use
             * API
             */
            Node node = getResource().adaptTo(Node.class);
            /**
             * Check if the node has title property
             */
            if(node.hasProperty("title")) {
                /**
                 * Reading the title property from the string
                 */
                String title = node.getProperty("title").getString();

                /**
                 * Setting the value entered by the user in the model object
                 */
                model.setTitle(title);

            }
        } catch (Exception e) {

            log.error(e.getMessage(), e);
        }
    }

    /**
     * This method is wrapper to return the model object
     *
     * @return {@link TextComponentModel}
     */
    public TextComponent2Model getModel() {
        return model;
    }
}

  HTL

Text Component 2.0 - Showcases Java Use API
<div data-sly-use.text="org.demo.core.cqcomponents.TextComponent">
	<h1>Title: ${text.model.title}</h1>
</div>