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Copy pathAsyncExample.java
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53 lines (40 loc) · 1.72 KB
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package examples;
import io.github.ccxt.exchanges.Binance;
import io.github.ccxt.types.Ticker;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.TimeUnit;
/**
* Demonstrates asynchronous fetching with CompletableFuture.
* Fetches multiple tickers concurrently and waits for all results.
*
* Usage:
* cd java && ./gradlew :examples:run -PmainClass=examples.AsyncExample
*/
public class AsyncExample {
public static void main(String[] args) throws Exception {
Binance exchange = new Binance();
exchange.loadMarkets(false);
String[] symbols = {"BTC/USDT", "ETH/USDT", "SOL/USDT", "XRP/USDT", "DOGE/USDT"};
System.out.println("Fetching " + symbols.length + " tickers concurrently...");
long start = System.currentTimeMillis();
// Fire all requests concurrently
@SuppressWarnings("unchecked")
CompletableFuture<Ticker>[] futures = new CompletableFuture[symbols.length];
for (int i = 0; i < symbols.length; i++) {
futures[i] = exchange.fetchTickerAsync(symbols[i], null);
}
// Wait for all to complete
CompletableFuture.allOf(futures).get(30, TimeUnit.SECONDS);
long elapsed = System.currentTimeMillis() - start;
System.out.printf("%-12s %12s %10s%n", "Symbol", "Price", "Change%");
System.out.println("-".repeat(36));
for (CompletableFuture<Ticker> f : futures) {
Ticker t = f.get();
System.out.printf("%-12s %12.4f %9.2f%%%n",
t.symbol,
t.last != null ? t.last : 0,
t.percentage != null ? t.percentage : 0);
}
System.out.println("\nAll fetched in " + elapsed + "ms");
}
}