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• EspressoMachine.java

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io.github.oliviercailloux.samples.coffee.EspressoMachine Maven / Gradle / Ivy

package io.github.oliviercailloux.samples.coffee;

public interface EspressoMachine extends CoffeeMachine {
  /**
   * Returns the number of watts that this machine consumes while producing a coffee.
   *
   * @return a strictly positive finite number.
   */
  public double getPower();

  /**
   * {@inheritDoc} This quantity, if not zero, is computed as the power of this machine times the
   * time spent for producing the last coffee (converted for the right units), plus an arbitrary
   * amount of 15 watt hours for the start and shutdown procedures.
   */
  @Override
  double getEnergySpent() throws IllegalStateException;
}