App Engine Services - Beginning Java Google App Engine - page 172

Listing 8-1. Servlet code for the Memcache API example

package com.kyleroche.gaeservices;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import javax.cache.Cache;
import javax.cache.CacheException;
import javax.cache.CacheFactory;
import javax.cache.CacheManager;
import javax.cache.CacheStatistics;
import javax.servlet.http.*;

import com.google.appengine.api.memcache.MemcacheService;
import com.google.appengine.api.memcache.stdimpl.GCacheFactory;

@SuppressWarnings("serial")
public class GAEJ___AppEngine_ServicesServlet extends HttpServlet {

public void doGet(HttpServletRequest req, HttpServletResponse resp)

throws IOException {

resp.setContentType("text/html");

Cache cache = null;

Map props = new HashMap();

props.put(GCacheFactory.EXPIRATION_DELTA, 3600);

props.put(MemcacheService.SetPolicy.ADD_ONLY_IF_NOT_PRESENT,

true);
try {
CacheFactory cacheFactory =
CacheManager.getInstance().getCacheFactory();

cache = cacheFactory.createCache(props);

} catch (CacheException e) {

resp.getWriter().println(e.getMessage());

}