@@ -0,0 +1,909 @@
+package com.google.sps.servlets;%0A %0A%0Aimport javax.servlet.annotation.WebServlet;%0Aimport javax.servlet.http.HttpServlet;%0Aimport javax.servlet.http.HttpServletRequest;%0Aimport javax.servlet.http.HttpServletResponse;%0Aimport java.util.*;%0Aimport java.io.IOException;%0A%0A%0Aimport com.google.gson.Gson;%0Aimport com.google.sps.data.Productset;%0A%0Aimport com.google.sps.data.ServletLibrary;%0A %0A %0A %0A@WebServlet(%22/product-list%22)%0Apublic class GetProductSetsServlet extends HttpServlet %7B%0A  Gson gson = new Gson();%0A  %0A %0A  public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException %7B%0A    %0A    String projectId = %22cloudberry-step-2020%22;%0A    String computeRegion = %22us-east1%22;%0A    %0A    ArrayList%3CProductset%3E productSets = ServletLibrary.listProductSets(projectId, computeRegion);%0A    response.setContentType(%22application/json;%22);%0A    response.getWriter().println(gson.toJson(productSets));%0A  %7D%0A  %0A%7D%0A

Add the servlet that gets a list of all the product sets available