Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.TimeUnit;

public class Main {
    public static void main(String[] args) {
        List<Trade> trades = TradeUtil.createTrades(100);

        int cpus = Runtime.getRuntime().availableProcessors();
        long start = System.currentTimeMillis();
        trades.stream().parallel().forEach(t -> doSomething(t));
        long end = System.currentTimeMillis();

        System.out.println("Time for parallel op:" + (end - start) / 1000 + "sec on " + cpus);
    }

    private static void doSomething(Trade t) {
        try {
            System.out.println(t);
            TimeUnit.SECONDS.sleep(2);
        } catch (InterruptedException ex) {
            System.out.println("Sleeping...");
        }
    }
}

class TradeUtil {

    public static List<Trade> createTrades() {
        List<Trade> trades = new ArrayList<Trade>();

        Trade t = new Trade(1, "IBM", 1000, "NEW");
        trades.add(t);
        t = new Trade(2, "APPL", 2000, "NEW");
        trades.add(t);
        t = new Trade(3, "IBM", 3000, "NEW");
        trades.add(t);
        t = new Trade(4, "IBM", 4000, "PENDING");
        trades.add(t);

        return trades;
    }

    public static List<Trade> createTrades(int size) {
        List<Trade> trades = new ArrayList<>();

        for (int i = 0; i < size; i++) {
            Trade t = new Trade(i, "ISUER " + i, i + 1000, "NEW");
            trades.add(t);
        }

        return trades;
    }

}

class Trade {

    private int tradeId = 0;
    private String issuer = null;
    private int quantity = 0;
    private String status = null;

    public Trade(int id, String issuer, int quantity, String status) {
        this.tradeId = id;
        this.issuer = issuer;
        this.quantity = quantity;
        this.status = status;
    }

    public int getTradeId() {
        return tradeId;
    }

    public void setTradeId(int tradeId) {
        this.tradeId = tradeId;
    }

    public String getIssuer() {
        return issuer;
    }

    public void setIssuer(String issuer) {
        this.issuer = issuer;
    }

    public int getQuantity() {
        return quantity;
    }

    public void setQuantity(int quantity) {
        this.quantity = quantity;
    }

    public String getStatus() {
        return status;
    }

    public void setStatus(String status) {
        this.status = status;
    }

    @Override
    public String toString() {
        return "Trade{" + "tradeId=" + tradeId + ", issuer=" + issuer + ", quantity=" + quantity + ", status="
                + status + '}';
    }

}