public static List<TopDatum> parse(JSONArray a) throws JSONException {
List<TopDatum> list = new ArrayList();
DateFormat df = new SimpleDateFormat("HH:mm:ss");
for (int i = 0; i < a.length(); i++) {
JSONObject o = a.getJSONObject(i);
TopDatum d = new TopDatum();
d.setSymbol(new Symbol(o.getString("symbol")));
d.setName(o.getString("name"));
d.setLast(new BigDecimal(o.getString("trade")));
d.setBuy(new BigDecimal(o.getString("buy")));
d.setSell(new BigDecimal(o.getString("sell")));
d.setPrevClose(new BigDecimal(o.getString("settlement")));
d.setChange(new BigDecimal(o.getString("changepercent")));
d.setAmount(new BigDecimal(o.getString("amount")));
d.setOpen(new BigDecimal(o.getString("open")));
try {
Date t = df.parse(o.getString("ticktime"));
Date date = TimeServer.now();
MarketCalendar mc = Calendars.get(d.getSymbol().getMarket());
if (!mc.isTradingDate(date)) {
date = mc.previousTradingDate(date);
} else {
Date biddingStartTime = mc.getOpenBiddingStartTime(date);
if (date.before(biddingStartTime)) {
logger.info(
"Using the previous date as the current time is before the bidding start time");
date = mc.previousTradingDate(date);
}
}
d.setTime(TimeUtils.merge(date, t));
} catch (ParseException ex) {
Logger.getLogger(TopFetcher.class.getName()).log(Level.SEVERE, null, ex);
continue;
}
d.setVolume(o.getLong("volume"));
d.setHigh(new BigDecimal(o.getString("high")));
d.setLow(new BigDecimal(o.getString("low")));
d.setMarketCapital(new BigDecimal(o.getString("mktcap")).multiply(new BigDecimal("10000")));
d.setHandOff(new BigDecimal(o.getString("turnoverratio")));
list.add(d);
}
Collections.sort(
list,
new Comparator<TopDatum>() {
@Override
public int compare(TopDatum o1, TopDatum o2) {
return -o1.getChange().compareTo(o2.getChange());
}
});
return list;
}
public void download(Set<Symbol> symbols) {
if (symbols == null || symbols.isEmpty()) {
symbols = getAllSymbols();
}
logger.log(Level.INFO, "Total {0} to be downloaded.", symbols.size());
MarketCalendar cal = Calendars.get(symbols.iterator().next().getMarket());
Date to = TimeServer.now();
Date from = cal.timeAdd(to, -DAYS * cal.getDailyTradingTime());
long used = 0;
int i = 0;
for (Symbol s : symbols) {
if (checkDataFileExists(s)) {
logger.log(Level.INFO, "{0}: Data file exists, will not download again.", s);
continue;
}
logger.log(Level.INFO, "{0}: Downloading hist price data for...", s);
long start = System.currentTimeMillis();
try {
download(s, from, to);
} catch (Exception ex) {
logger.log(Level.WARNING, s + ": failed to download hist price data", ex);
}
used += System.currentTimeMillis() - start;
if (i > 0 && i % 10 == 0) {
long avgUsed = used / 10;
used = 0;
long willUsed = (symbols.size() - i) * avgUsed / Interval.M1;
logger.log(
Level.INFO,
"Total {0} of {1} symbols are completed, estimated the remaining will need {2} minutes to complete.",
new Object[] {i, symbols.size(), willUsed});
}
try {
Thread.sleep(SLEEP_TIME);
} catch (Exception ex) {
}
i++;
}
}
public void update(Set<Symbol> symbols) {
if (symbols == null || symbols.isEmpty()) {
symbols = getAllSymbols();
}
for (Symbol s : symbols) {
try {
Date from = null;
Date to = TimeServer.now();
HistPriceDatum last = getLastInFile(s);
MarketCalendar cal = Calendars.get(s.getMarket());
if (last == null) {
logger.log(
Level.WARNING,
"{0}: not found data file, will use the default 'start date' to download the all data.",
s);
from = cal.timeAdd(to, -DAYS * cal.getDailyTradingTime());
} else {
from = last.getTime();
if (cal.isInSameDate(from, to)) {
logger.log(
Level.INFO,
"{0}: all data are up to date, no need to download",
new Object[] {s, from, to});
continue; // no need to download since all data are in file
}
from = cal.timeAdd(from, cal.getDailyTradingTime()); // a day ahead
}
logger.log(
Level.INFO, "{0}: downloading price data from {1} to {2}", new Object[] {s, from, to});
download(s, from, to);
logger.log(
Level.INFO, "{0}: Downloaded price data from {1} to {2}", new Object[] {s, from, to});
} catch (Exception ex) {
logger.log(Level.WARNING, s + ": ignored to download/update the hist price", ex);
}
}
}