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vikas |
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package in.shop2020.web;
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import java.io.IOException;
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rajveer |
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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vikas |
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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rajveer |
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import org.json.JSONObject;
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vikas |
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import com.google.appengine.api.datastore.DatastoreService;
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import com.google.appengine.api.datastore.DatastoreServiceFactory;
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import com.google.appengine.api.datastore.Entity;
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import com.google.appengine.api.datastore.PreparedQuery;
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import com.google.appengine.api.datastore.Query;
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public class ShowCompareProducts extends HttpServlet {
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private static final long serialVersionUID = -8236918415987438049L;
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public void doPost(HttpServletRequest req, HttpServletResponse resp) {
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rajveer |
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resp.setContentType("application/json");
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vikas |
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DatastoreService datastore = DatastoreServiceFactory
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.getDatastoreService();
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Query q = new Query("DataLog");
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q.addFilter("eventType", Query.FilterOperator.EQUAL, "PRODUCT_COMPARE");
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PreparedQuery pq = datastore.prepare(q);
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rajveer |
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Map<Long, Map<Long, Long>> comparisonStats = new HashMap<Long, Map<Long, Long>>();
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vikas |
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try {
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for (Entity result : pq.asIterable()) {
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rajveer |
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List<Long> itemIds;
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try{
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itemIds = (List<Long>) result.getProperty("itemIds");
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}catch (ClassCastException ce) {
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System.out.println("Unable to cast itemIds to List");
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continue;
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}
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rajveer |
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if(itemIds != null && !itemIds.isEmpty()){
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for(int i=0; i<itemIds.size(); i++){
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for(int j=0; j<i; j++){
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Long itemOne = itemIds.get(i);
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Long itemTwo = itemIds.get(j);
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Map<Long, Long> comparedItems;
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comparedItems = comparisonStats.get(itemOne);
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if(comparedItems==null){
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comparedItems = new HashMap<Long, Long>();
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comparisonStats.put(itemOne, comparedItems);
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}
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if(comparedItems.containsKey(itemTwo)){
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comparedItems.put(itemTwo, comparedItems.get(itemTwo)+1);
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}else{
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comparedItems.put(itemTwo, 1L);
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}
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comparedItems = comparisonStats.get(itemTwo);;
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if(comparedItems==null){
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comparedItems = new HashMap<Long, Long>();
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comparisonStats.put(itemTwo, comparedItems);
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}
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if(comparedItems.containsKey(itemOne)){
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comparedItems.put(itemOne, comparedItems.get(itemOne)+1);
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}else{
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comparedItems.put(itemOne, 1L);
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}
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}
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}
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}
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vikas |
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}
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rajveer |
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JSONObject comparisonStatsJson = new JSONObject(comparisonStats);
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resp.getWriter().println(comparisonStatsJson);
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vikas |
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} catch (IOException e) {
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rajveer |
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System.out.println("Unable to write at output stream");
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vikas |
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}
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}
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public void doGet(HttpServletRequest req, HttpServletResponse resp) {
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doPost(req, resp);
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}
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}
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