org.knowm.xchange.simulated.MatchingEngineFactory Maven / Gradle / Ivy
package org.knowm.xchange.simulated;
import java.math.BigDecimal;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.function.Consumer;
import org.knowm.xchange.currency.CurrencyPair;
/**
* Represents a single virtual cryptocurrency exchange - effectively a set of order books for each
* currency where trades can be placed as maker orders and taker orders can be matched.
*
* If shared between instances of {@link SimulatedExchange}, this ensures that all users will be
* trading against the same order books and thus each other.
*
* @author Graham Crockford
*/
public class MatchingEngineFactory {
private final ConcurrentMap engines = new ConcurrentHashMap<>();
private final AccountFactory accountFactory;
public MatchingEngineFactory(AccountFactory accountFactory) {
this.accountFactory = accountFactory;
}
MatchingEngine create(
CurrencyPair currencyPair, int priceScale, BigDecimal minimumAmount, Consumer onFill) {
return engines.computeIfAbsent(
currencyPair,
pair -> new MatchingEngine(accountFactory, pair, priceScale, minimumAmount, onFill));
}
MatchingEngine create(CurrencyPair currencyPair, int priceScale, BigDecimal minimumAmount) {
return engines.computeIfAbsent(
currencyPair, pair -> new MatchingEngine(accountFactory, pair, priceScale, minimumAmount));
}
}