hello/java/samples/multithread/GazStation2/src/gazstation2/FilingColumn.java

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package gazstation2;

import java.util.Random;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author denis
 */
class FilingColumn {
    
    private int bigTank;
    private volatile boolean isOpen;
    
    public FilingColumn (){
        bigTank = new Random().nextInt(500);
        isOpen = true;
    }

    public int getBigTank() {
        return bigTank;
    }
    
    public synchronized boolean getFuel(Car car, int fuel) {
        if(isOpen){
            if(bigTank<fuel){
                System.out.println(car.name + ": не достаточно топлива. Ожидает.");
                GazStation.getState().callGazProducer(this);
                isOpen = false;
            }else{
                bigTank -= fuel;
                car.tank += fuel;
                System.out.println("--------------------------" + car.name + ": заправил " + fuel + " л. Объем топлива: " + car.tank);
            }
        }
        return isOpen;
    }
    
    public void addFuel(int fuel){
        bigTank += fuel;
        isOpen = true;
    }
}