IN JAVA CODE - please use original code

3. Modify Restart.action() to start the the system by reading events from a text file. Use Scanner and an appropriate regular expression.

4. Try running GreenhouseControls by:

• java GreenhouseControls -f examples1.txtu

  and

  java GreenhouseControls -f examples2.txt

5. The -f argument must be present. It must be either -f or -d. Please see Part 4. The event information must be in the format specified in examples1.txt and examples2.txt.

Step 3: Add functionality to simulate problems

1. Create a WindowMalfunction and PowerOut Events to simulate problems that may occur in a GreenhouseControls. The event should set the following boolean variables as appropriate in GreenhouseControls:

• windowok = false;

  poweron = false;

After setting the variables, WindowMalfunction or PowerOut should throw an exception specifying the faulty condition. Create a ControllerException class that extends Exception for this purpose.

2. If an exception is thrown from WindowMalfunction or PowerOut, the Controller catches the exception, then initiates an emergency shutdown with an appropriate message. Add a method to Controller called shutdown, and override this method in GreenhouseControls to accomplish the shutdown.

3. Add an instance variable in GreenhouseControls called errorcode. It indicates the nature of the problem with an error code in an int variable errorcode (1 for WindowMalfunction and 2 for PowerOut), logs the time and the reason for the shutdown in a text file in the current directory called error.log and prints it to the console. It then serializes and saves the entire GreenhouseControls object in a file dump.out in the current directory before exiting.

4. Run the following to test this part:

• java GreenhouseControls f examples3.txt

  and

  java GreenhouseControls -f examples4.txt

Step 4: System restore

In this part, we add functionality for restoring the saved GreenhouseControls object and having it resume execution where it left off. It demonstrates the use of interfaces and the capability of Java methods to return objects.

1. Create the following interface

• interface Fixable {

  // turns Power on, fix window and zeros out error codes

  void fix ();

  // logs to a text file in the current directory called fix.log

  // prints to the console, and identify time and nature of

  // the fix

  void log();

  }

2. Create inner classes PowerOn and FixWindow that implement Fixable.

3. Add a method to GreenhouseControls

• int getError();

  which returns the error code saved.

4. Add a method within GreenhouseControls

• Fixable getFixable(int errorcode);

  which returns the appropriate Fixable object to correct the error and reset the error code to zero.

5. Create a class Restore to restore the system after a shutdown. When this command line is called:

• java GreenhouseControls -d dump.out

  a Restore object should be created and the file name dump.out is passed to the Restore object. It then retrieves the GreenhouseControls object saved by any emergency shutdown. It has the state of the saved system printed to the console. It sets any variable that was changed by the Event that initiated the shutdown back to its normal state (e.g., poweron=true) using the appropriate Fixable. It then starts the system running at the event following the event that caused the shutdown. A proper error message should be displayed on the console if any exception or error is caught by the Restore object.

------------------------------------------ Current code -----------------------------------------

import java.util.List; import java.util.ArrayList; public class Controller { private final List  eventList = new ArrayList<>(); public void addEvent(Event c) { eventList.add(c); } public void run() { while (eventList.size() > 0) { for (Event e : new ArrayList<>(eventList)) { if (e.ready()) { System.out.println(e); e.action(); eventList.remove(e); } } } } } 

import java.io.*; public abstract class Event { private long eventTime; protected final long delayTime; public Event (long delayTime) { this.delayTime = delayTime; start(); } public void start() { eventTime = System.nanoTime() + delayTime; } public boolean ready() { return System.nanoTime() >= eventTime; } public abstract void action(); } 

import java.io.*; import java.util.Calendar; public class GreenHouseControls extends Controller { public class LightOn extends Event { public LightOn(long delayTime) { super (delayTime); } public void action() { light = true; } //to turn the light on  public String toString() { return "Light is on."; } } public class LightOff extends Event { public LightOff(long delayTime) { super (delayTime); } public void action() { light = false; } //to turn light off  public String toString() { return "Light is off."; } } public class WaterOn extends Event { public WaterOn (long delayTime) { super(delayTime); } public void action() { water = true; } //water on  public String toString() { return "Greenhouse water is on."; } } public class WaterOff extends Event { public WaterOff(long delayTime) { super(delayTime); } public void action() { water = false; } //water off  public String toString() { return "Greenhouse water is off."; } } public class ThermostatOn extends Event { public ThermostatOn(long delayTime) { super(delayTime); } public void action() { thermostat = "Night."; } //set thermostat to night  public String toString() { return "Thermostat on Night Setting."; } } public class ThermostatOff extends Event { public ThermostatOff(long delayTime) { super(delayTime); } public void action() { thermostat = "Day"; } //set thermostat to day  public String toString() { return "Thermostat on Day Setting."; } } public class FansOn extends Event { public FansOn(long delayTime) { super(delayTime); } public void action() { Fans = true; } //fans on  public String toString() { return "Fans are on."; } } public class FansOff extends Event { public FansOff(long delayTime) { super(delayTime); } public void action() { Fans = false; } // fans off  public String toString() { return "Fans are off."; } } public class Bell extends Event { public Bell(long delayTime) { super(delayTime); } public void action() { addEvent(new Bell(delayTime)); } public String toString() { return "Bing!"; } } public class Restart extends Event { private Event[] eventList; public Restart (long delayTime, Event[] eventList) { super(delayTime); this.eventList = eventList; for (Event e : eventList) { addEvent(e); } } public void action() { for (Event e : eventList) { e.start(); addEvent(e); } start(); addEvent(this); } public String toString() { return "Restarting System."; } } public static class Terminate extends Event { public Terminate(long delayTime) { super (delayTime); } public void action() { System.exit(0); } public String toString() { return "Terminating."; } } boolean Fans = false; private String thermostat = "Day"; private boolean water = false; private boolean light = false; }