FecthI18nValuesServlet.java

import java.io.IOException;
import java.util.Arrays;
import java.util.Iterator;
import java.util.Locale;
import java.util.ResourceBundle;

import javax.servlet.Servlet;
import javax.servlet.ServletException;

import org.apache.sling.api.SlingHttpServletRequest;
import org.apache.sling.api.SlingHttpServletResponse;
import org.apache.sling.api.servlets.SlingSafeMethodsServlet;
import org.osgi.service.component.annotations.Component;
import org.osgi.service.component.propertytypes.ServiceDescription;

import com.google.gson.JsonObject;

@Component(service = Servlet.class,

		property = {
				"sling.servlet.methods=" + "GET", 
				"sling.servlet.paths=" + "/bin/fetchi18nvalues/search",
				// "sling.servlet.paths=" + "/bin/fecthi18nvalues/search1",
				"sling.servlet.extensions=" + "json",
				"sling.servlet.paths.strict=" + true 
				})

@ServiceDescription("Component Limitor Servlet")
public class FecthI18nValuesServlet extends SlingSafeMethodsServlet {

	/** http://localhost:4502/bin/fecthi18nvalues/search.bg.json **/

	String[] languages = { "bg", "en", "fr", "de", "hr","it" };

	private static final long serialVersionUID = 1L;

	@Override
	protected void doGet(final SlingHttpServletRequest req, final SlingHttpServletResponse resp)
			throws ServletException, IOException {

		resp.setContentType("application/json");
		resp.setHeader("Cache-Control","max-age=3600");
		
		JsonObject i18n = new JsonObject();

		try {
			
			String baseName = req.getRequestPathInfo().getResourcePath().split("/")[3];
			String[] selectors = req.getRequestPathInfo().getSelectors();
			
			if (selectors.length > 0 && Arrays.stream(languages).anyMatch(selectors[0]::equals)) {
				
				ResourceBundle resourceBundle = req.getResourceBundle(baseName, new Locale(selectors[0]));
				Iterator<String> itr = resourceBundle.getKeys().asIterator();

				itr.forEachRemaining(key -> i18n.addProperty(key, resourceBundle.getString(key)));
			}

			resp.getWriter().print(i18n.toString());

		} catch (Exception e) {
			resp.getWriter().print(i18n.toString());
		}

	}
}