1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
package lq;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.jdo.PersistenceManager;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.JDOMException;
import org.jdom.input.SAXBuilder;
import org.jdom.xpath.XPath;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.logging.Logger;
public class ImportQuotes extends HttpServlet {
private static final Logger logger = Logger.getLogger(ImportQuotes.class.getName());
// hacks....
private HashMap<Long, Quote> quoteCache;
@Override
public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws IOException {
quoteCache = new HashMap<Long, Quote>();
String path = "db-dump.xml";
resp.setContentType("text/plain");
resp.getWriter().println("Trying to import quotes from " + path);
SAXBuilder builder = new SAXBuilder();
try {
Document document = builder.build(path);
Element root = document.getRootElement();
List quoteRows = XPath.selectNodes(root,
"//table_data[@name='quotes']/*");
List voteRows = XPath.selectNodes(root,
"//table_data[@name='votes']/*");
List<Quote> quotes = importQuotes(quoteRows);
List<Vote> votes = importVotes(voteRows);
PersistenceManager pm = PMF.get().getPersistenceManager();
try {
String importIdString = req.getParameter("importId");
if (importIdString == null) {
uploadInChunks(pm, votes, 100);
uploadInChunks(pm, quotes, 100);
resp.getWriter().println("Import finished.");
}
else {
int importId = Integer.parseInt(importIdString);
Quote q = quotes.get(importId);
pm.makePersistent(q);
for (Vote v : votes) {
if (v.getQuoteId().equals(q.getId())) {
pm.makePersistent(v);
}
}
resp.getWriter().println("There are " + quotes.size() +
" quotes in the old db.");
resp.getWriter().println("Quote " + importId + " imported.");
}
}
finally {
pm.close();
}
} catch (Exception e) {
e.printStackTrace(resp.getWriter());
}
}
private void uploadInChunks(PersistenceManager pm, List<?> objects, int chunkSize) {
for (int i = 0; i < objects.size(); i += chunkSize) {
List<Object> chunk = new ArrayList<Object>();
for (int j = i; j < Math.min(objects.size(), i + chunkSize); j++) {
chunk.add(objects.get(j));
}
pm.makePersistentAll(chunk);
}
}
private List<Quote> importQuotes(List quoteRows) throws Exception {
List<Quote> quotes = new ArrayList<Quote>();
for (Object row : quoteRows) {
@SuppressWarnings("unchecked")
Element elem = (Element) row;
quotes.add(importQuote(elem));
}
logger.info("Imported " + quotes.size() + " quotes");
return quotes;
}
private Quote importQuote(Element quoteRow) throws Exception {
Long oldId = Long.parseLong(getChildWithName("id", quoteRow));
Long id = Long.parseLong(getChildWithName("number", quoteRow));
String approvedString = getChildWithName("approved", quoteRow);
Boolean approved = approvedString.equals("1") ? true : false;
String name = getChildWithName("name", quoteRow);
String dateString = getChildWithName("date", quoteRow);
Date date = DateUtil.dateFormat.parse(dateString);
String content = getChildWithName("text", quoteRow);
String timeString = getChildWithName("time", quoteRow);
Date timestamp = DateUtil.timestampFormat.parse(timeString);
String ip = getChildWithName("ip", quoteRow);
Quote quote = new Quote(date, name, content, ip);
quote.setId(id);
quote.setTimestamp(timestamp);
quote.setApproved(approved);
quoteCache.put(oldId, quote);
return quote;
}
private List<Vote> importVotes(List voteRows) throws Exception {
List<Vote> votes = new ArrayList<Vote>();
for (Object row : voteRows) {
@SuppressWarnings("unchecked")
Element elem = (Element) row;
Vote vote = importVote(elem);
if (vote != null) {
votes.add(vote);
}
}
logger.info("Imported " + votes.size() + " votes");
return votes;
}
private Vote importVote(Element voteRow) throws Exception {
Long quoteId = Long.parseLong(getChildWithName("id", voteRow));
Quote quote = quoteCache.get(quoteId);
if (quote == null) {
logger.warning("Could not find quote with id " + quoteId);
return null;
}
Long rating = Long.parseLong(getChildWithName("vote", voteRow));
Date timestamp = lq.DateUtil.timestampFormat.parse(getChildWithName("time", voteRow));
String ip = getChildWithName("ip", voteRow);
Vote vote = new Vote(quoteId, rating, ip);
vote.setTimestamp(timestamp);
QuoteUtil.addVote(quote, vote);
return vote;
}
private String getChildWithName(String name, Element parent) throws Exception {
String xpath = "field[@name='" + name + "']";
Element child = (Element) XPath.selectSingleNode(parent, xpath);
return child.getValue();
}
}
|
