thoerup/marketstats/ShowStats.java

package dk.thoerup.marketstats;

import java.io.IOException;
import java.net.InetSocketAddress;
import java.util.ArrayList;
import java.util.Locale;
import java.util.concurrent.TimeUnit;
import java.util.logging.Logger;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import net.spy.memcached.MemcachedClient;

import com.gc.android.market.api.MarketSession;
import com.gc.android.market.api.model.Market.AppsRequest;
import com.gc.android.market.api.model.Market.CommentsRequest;


public class ShowStats extends HttpServlet {
        private static final long serialVersionUID = 1L;

        static final int MAXCOMMENTS = 30;
        static final int APP_TIMEOUT = 30*60;
        static final int COMMENT_TIMEOUT = APP_TIMEOUT * 4;
        
        static final Logger log = Logger.getLogger(ShowStats.class.getName());

        String login;
        String password;
        
        MemcachedClient memcache = null;


        @Override
        public void init() throws ServletException {
                super.init();

                login = getServletContext().getInitParameter("login");
                password = getServletContext().getInitParameter("password");
                
                try {
                        memcache = new MemcachedClient(new InetSocketAddress("localhost", 11211));
                } catch (IOException e) {
                        throw new ServletException(e);
                }
        }

        @Override
        public void destroy() {
                super.destroy();
                
                memcache.shutdown(3, TimeUnit.SECONDS);
                memcache = null;
        }

        protected AppBean lookupApp(String query) throws IOException {
                

                String key = "marketstats:" + query.replace(' ', '_');
                //String response = (String) memcache.get(key);
                AppBean response = (AppBean) memcache.get(key);

                if (response == null) {
                        response = lookupAppWorker(query);
                        if (response != null) {
                                memcache.set(key, APP_TIMEOUT, response);
                        }
                } 
                return response;
        }

        protected AppBean lookupAppWorker(String query) {

                MarketSession session = new MarketSession();
                session.login(login,password);


                AppsRequest appsRequest = AppsRequest.newBuilder()
                .setQuery(query)
                .setStartIndex(0)
                .setEntriesCount(1)
                .setWithExtendedInfo(true)
                .build();
                
                AppsCallback appsCb = new AppsCallback();
                session.append(appsRequest, appsCb);
                session.flush();
                
                return appsCb.getResult();
        }       
        
        CommentsRequest buildCommentRequest(String appId, int start, int count) {
                CommentsRequest commentsRequest = CommentsRequest.newBuilder()
                .setAppId(appId)
                .setStartIndex(start)
                .setEntriesCount(count)
                .build();
                
                return commentsRequest;
        }
        
        private ArrayList<CommentBean> loadComments(String appId) {
                
                ArrayList<CommentBean> commentBeans = new ArrayList<CommentBean>();
                MarketSession session = new MarketSession();
                session.login(login,password);
                
                CommentCallback commentsCb = new CommentCallback();
                commentsCb.setList( commentBeans ); 

                session.setLocale( Locale.ROOT );
                
                
                int start = 0;
                do {
                        int count = 10;
                        if (start > 0)                          
                                count = Math.min(10, commentsCb.getEntryCount() );
                        
                        //log.warning("count=" + count + " start=" + start + " entryCount=" + commentsCb.getEntryCount() );
                        CommentsRequest commentsRequest = buildCommentRequest(appId,start,count);                       
                        session.append(commentsRequest, commentsCb);
                        start +=10;
                        
                        CommentsRequest commentsRequest2 = buildCommentRequest(appId,start,count);                      
                        session.append(commentsRequest2, commentsCb);
                        session.flush();
                        
                        start +=10;
                        
                        if (start >= MAXCOMMENTS)
                                break; //emergency brake
                        
                } while ( start < commentsCb.getEntryCount() );
                
                return commentBeans;
        }

        
        @SuppressWarnings("unchecked")
        public ArrayList<CommentBean> getComments(AppBean app) {                
                String key = "marketstats:comments:" + app.getId();
                ArrayList<CommentBean>  comments =  (ArrayList<CommentBean>) memcache.get(key);

                if (comments == null) {
                        comments = loadComments(app.getId());
                        memcache.set(key, COMMENT_TIMEOUT, comments); 
                } 
                return comments;
        }

        protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
                String query = request.getParameter("query");
                
                AppBean app = lookupApp(query);
                if (app != null) {
                        request.setAttribute("app", app);
                
                        ArrayList<CommentBean> comments = getComments(app);
                        request.setAttribute("comments", comments);
                
                        getServletContext().getRequestDispatcher("/statsview.jsp").forward(request, response);
                } else {
                        response.getWriter().print("No app found with query=" + query);
                }
        }

}
1	torben	659	package dk.thoerup.marketstats;
2
3			import java.io.IOException;
4			import java.net.InetSocketAddress;
5	torben	662	import java.util.ArrayList;
6	torben	659	import java.util.Locale;
7	torben	762	import java.util.concurrent.TimeUnit;
8	torben	659	import java.util.logging.Logger;
9
10			import javax.servlet.ServletException;
11			import javax.servlet.http.HttpServlet;
12			import javax.servlet.http.HttpServletRequest;
13			import javax.servlet.http.HttpServletResponse;
14
15			import net.spy.memcached.MemcachedClient;
16
17			import com.gc.android.market.api.MarketSession;
18			import com.gc.android.market.api.model.Market.AppsRequest;
19			import com.gc.android.market.api.model.Market.CommentsRequest;
20
21
22	torben	664
23	torben	659	public class ShowStats extends HttpServlet {
24			private static final long serialVersionUID = 1L;
25
26	torben	950	static final int MAXCOMMENTS = 30;
27			static final int APP_TIMEOUT = 30*60;
28			static final int COMMENT_TIMEOUT = APP_TIMEOUT * 4;
29	torben	949
30	torben	659	static final Logger log = Logger.getLogger(ShowStats.class.getName());
31
32			String login;
33			String password;
34	torben	667
35			MemcachedClient memcache = null;
36	torben	659
37
38			@Override
39			public void init() throws ServletException {
40			super.init();
41
42			login = getServletContext().getInitParameter("login");
43			password = getServletContext().getInitParameter("password");
44	torben	667
45			try {
46			memcache = new MemcachedClient(new InetSocketAddress("localhost", 11211));
47			} catch (IOException e) {
48			throw new ServletException(e);
49			}
50	torben	659	}
51
52	torben	762	@Override
53			public void destroy() {
54			super.destroy();
55
56			memcache.shutdown(3, TimeUnit.SECONDS);
57			memcache = null;
58			}
59
60	torben	952	protected AppBean lookupApp(String query) throws IOException {
61	torben	667
62	torben	659
63	torben	759	String key = "marketstats:" + query.replace(' ', '_');
64	torben	950	//String response = (String) memcache.get(key);
65			AppBean response = (AppBean) memcache.get(key);
66	torben	659
67			if (response == null) {
68	torben	952	response = lookupAppWorker(query);
69	torben	950	if (response != null) {
70			memcache.set(key, APP_TIMEOUT, response);
71			}
72			}
73	torben	659	return response;
74			}
75	torben	952
76			protected AppBean lookupAppWorker(String query) {
77
78			MarketSession session = new MarketSession();
79			session.login(login,password);
80
81
82			AppsRequest appsRequest = AppsRequest.newBuilder()
83			.setQuery(query)
84			.setStartIndex(0)
85			.setEntriesCount(1)
86			.setWithExtendedInfo(true)
87			.build();
88
89			AppsCallback appsCb = new AppsCallback();
90			session.append(appsRequest, appsCb);
91			session.flush();
92
93			return appsCb.getResult();
94			}
95	torben	663
96	torben	950	CommentsRequest buildCommentRequest(String appId, int start, int count) {
97			CommentsRequest commentsRequest = CommentsRequest.newBuilder()
98			.setAppId(appId)
99			.setStartIndex(start)
100			.setEntriesCount(count)
101			.build();
102
103			return commentsRequest;
104			}
105
106			private ArrayList<CommentBean> loadComments(String appId) {
107
108			ArrayList<CommentBean> commentBeans = new ArrayList<CommentBean>();
109			MarketSession session = new MarketSession();
110			session.login(login,password);
111
112	torben	663	CommentCallback commentsCb = new CommentCallback();
113			commentsCb.setList( commentBeans );
114	torben	659
115	torben	756	session.setLocale( Locale.ROOT );
116	torben	663
117
118	torben	756
119	torben	663	int start = 0;
120			do {
121			int count = 10;
122			if (start > 0)
123			count = Math.min(10, commentsCb.getEntryCount() );
124
125	torben	757	//log.warning("count=" + count + " start=" + start + " entryCount=" + commentsCb.getEntryCount() );
126	torben	950	CommentsRequest commentsRequest = buildCommentRequest(appId,start,count);
127			session.append(commentsRequest, commentsCb);
128			start +=10;
129	torben	663
130	torben	950	CommentsRequest commentsRequest2 = buildCommentRequest(appId,start,count);
131			session.append(commentsRequest2, commentsCb);
132	torben	663	session.flush();
133	torben	950
134	torben	663	start +=10;
135
136	torben	949	if (start >= MAXCOMMENTS)
137	torben	663	break; //emergency brake
138
139			} while ( start < commentsCb.getEntryCount() );
140	torben	950
141			return commentBeans;
142	torben	663	}
143	torben	659
144	torben	950
145	torben	705
146	torben	952	@SuppressWarnings("unchecked")
147	torben	950	public ArrayList<CommentBean> getComments(AppBean app) {
148			String key = "marketstats:comments:" + app.getId();
149			ArrayList<CommentBean> comments = (ArrayList<CommentBean>) memcache.get(key);
150	torben	662
151	torben	950	if (comments == null) {
152			comments = loadComments(app.getId());
153			memcache.set(key, COMMENT_TIMEOUT, comments);
154			}
155			return comments;
156	torben	659	}
157
158			protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
159	torben	705	String query = request.getParameter("query");
160	torben	950
161	torben	952	AppBean app = lookupApp(query);
162	torben	950	if (app != null) {
163			request.setAttribute("app", app);
164
165			ArrayList<CommentBean> comments = getComments(app);
166			request.setAttribute("comments", comments);
167
168			getServletContext().getRequestDispatcher("/statsview.jsp").forward(request, response);
169			} else {
170			response.getWriter().print("No app found with query=" + query);
171			}
172	torben	659	}
173
174			}