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mittens13 / AsynchonousApi.java.
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// // Asynchronous implementation, using BinanceApiCallback to handle the result. ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// static void getCandleStickBars() BinanceApiAsyncRestClient client = factory.newAsyncRestClient(); List c = new ArrayList<>(); try client.getCandlestickBars("BTCUSDT", CandlestickInterval.WEEKLY, new BinanceApiCallback () @Override public void onResponse(List response) c.addAll(response); System.out.println("Ready :" + c.get(0).getOpen()); > >); > catch (BinanceApiException e) System.out.println(e.getError().getCode()); // -1121 System.out.println(e.getError().getMsg()); // Invalid symbol > >
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//TESTED private static final Map > m = new ConcurrentHashMap <>(); public static void asyncCandles ( long hashKey , long start , long end ) getAsyncClient (). getCandlestickBars ( ticker , CandlestickInterval . HOURLY , 10 , start , end , new BinanceApiCallback <>() @ Override public void onResponse ( List response ) Candlestick last = response . get ( response . size () - 1 ); if ( m . get ( hashKey ) == null ) m . put ( hashKey , response ); > else m . get ( hashKey ). addAll ( response ); > // System.out.println(last.getFormattedOpenTime() + " " + Instant.ofEpochMilli(end).atZone(ZoneId.systemDefault()).toLocalDateTime()); if ( last . getOpenTime () >= end ) onClose (); > else System . out . println ( hashKey + " : " + m . get ( hashKey ). size ()); asyncCandles ( hashKey , last . getOpenTime (), end ); > > @ Override public void onFailure ( Throwable cause ) System . out . println ( cause . getCause ()); > @ Override public void onClose () System . out . println ( "End is reached" ); m . remove ( hashKey ); if ( m . get ( hashKey ) == null ) System . out . println ( "Removedal of key succesfull: " + hashKey ); > > >); >
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//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// // Websocket to keep listening to a specific coin. // Note: websockets use lower case letters for tickers. //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// public static void streamCandleData () BinanceApiWebSocketClient client = BinanceApiClientFactory . newInstance (). newWebSocketClient (); client . onCandlestickEvent ( "ethbtc" , CandlestickInterval . ONE_MINUTE , response -> process ( response ) ); > static void process ( CandlestickEvent r ) System . out . println ( r . getBarFinal () + " " + r . getOpenTime () + " " + r . getHigh () + " " + r . getClose ()); if ( r . getBarFinal ()) CandleStick candle = new Candlestick (); candle . setOpenTime ( r . getOpenTime ()); candle . setOpen ( r . getOpen ()); candle . setHigh ( r . getHigh ()); candle . setLow ( r . getLow ()); candle . setClose ( r . getClose ()); candle . setVolume ( r . getVolume ()); candle . setCloseTime ( r . getCloseTime ()); //Write to DB Write . writeBlockingSinglePoint ( candle ); > >
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/** * Synchronous CandleStick retrieval from binance */ public static Candlestick [] getCandleSticks ( String ticker , CandlestickInterval interval , long start ) Long target = getLatestTick ( interval ); List list = new ArrayList <>(); long shift = TimeUnit . MINUTES . toMillis ( 15 ); while ( true ) list . addAll ( getApiClient (). getCandlestickBars ( ticker , interval , 1000 , start , target )); start = list . get ( list . size () - 1 ). getOpenTime () + shift ; if ( start >= target ) System . out . println ( "Break" ); break ; > > return list . stream (). toArray ( Candlestick []:: new ); >
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