Initial commit (ba9c1924) · Commits · examples / Design Patterns in Java

Design Patterns in Java - Working Files/Chapter 1/No Work Files.rtf

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		{\rtf1\ansi\ansicpg1252\cocoartf1038\cocoasubrtf350
		{\fonttbl\f0\fswiss\fcharset0 Helvetica;}
		{\colortbl;\red255\green255\blue255;}
		\margl1440\margr1440\vieww9000\viewh8400\viewkind0
		\pard\tx720\tx1440\tx2160\tx2880\tx3600\tx4320\tx5040\tx5760\tx6480\tx7200\tx7920\tx8640\ql\qnatural\pardirnatural

		\f0\fs24 \cf0 No work files for this lesson...}
		No newline at end of file

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Changes for Design Patterns in Java - Working Files/Chapter 10/src/com/scispike/observer/client/ObserverThermometerClient.java: 36 added lines, 0 removed lines.
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		package com.scispike.observer.client;

		import com.scispike.observer.library.Setup;
		import com.scispike.observer.library.Thermometer;


		public class ObserverThermometerClient implements java.util.Observer {

		public ObserverThermometerClient() {
		}
		@Override
		public void update(java.util.Observable o, Object args) {
		Thermometer t = (Thermometer) o;
		System.out.println(
		"Checking temprature"
		+ ": "
		+ t.getTempratureCelcius()
		+ ", "
		+ t.getTempratureKelvin()
		+ ", "
		+ t.getTemperatureFahrenheit()
		);
		}
		public static void main(String[] args) {
		Setup s = new Setup();
		ObserverThermometerClient client = new ObserverThermometerClient();
		s.getThermometer().addObserver(client);
		try {
		Thread.sleep(20000);
		} catch (InterruptedException e) {
		e.printStackTrace();
		}
		s.shutdown();
		}

		}

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Changes for Design Patterns in Java - Working Files/Chapter 10/src/com/scispike/observer/client/PollingThermometerClient.java: 34 added lines, 0 removed lines.
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		package com.scispike.observer.client;

		import com.scispike.observer.library.Setup;
		import com.scispike.observer.library.Thermometer;


		public class PollingThermometerClient {
		private final static long SEC_TO_RUN = 20;
		private final static long MS_BETWEEN_POLLS = 50;
		public static void main(String[] args) {
		Setup s = new Setup();
		Thermometer t = s.getThermometer();
		long count = SEC_TO_RUN * 1000 / MS_BETWEEN_POLLS;
		try {
		for (int i = 0; i < count; i++) {
		Thread.sleep(MS_BETWEEN_POLLS);
		System.out.println(
		"Checking temprature #"
		+ i
		+ ": "
		+ t.getTempratureCelcius()
		+ ", "
		+ t.getTempratureKelvin()
		+ ", "
		+ t.getTemperatureFahrenheit()
		);
		}
		} catch (InterruptedException e) {
		e.printStackTrace();
		}
		s.shutdown();
		}

		}

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Changes for Design Patterns in Java - Working Files/Chapter 10/src/com/scispike/observer/library/Driver.java: 36 added lines, 0 removed lines.
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		package com.scispike.observer.library;

		public class Driver extends Thread {
		public static final long AVERAGE_TIME_BETWEEN_UPDATES_IN_SEC = 5;
		private static final long RANGE_OF_CHANGE = 100;
		public int updateCount = 0;
		private long value = 30000; // initial value... Just a number to make it work OK
		private Thermometer thermometer;
		private boolean shutdown = false;
		public Driver(Thermometer t) {
		this.thermometer = t;
		}
		@Override
		public void run() {
		try {
		while (!this.shutdown) {
		this.value += (long) (Math.random() * RANGE_OF_CHANGE) - (RANGE_OF_CHANGE/2);
		this.updateCount++;
		System.out.println(
		"Driver update #"
		+ this.updateCount
		+ ": "
		+ this.value
		);
		this.thermometer.driverValue(this.value);
		Thread.sleep((long) (Math.random() * AVERAGE_TIME_BETWEEN_UPDATES_IN_SEC * 1000));
		}
		}
		catch (Exception e) {

		}
		}
		public void shutdown() {
		this.shutdown = true;
		}
		}

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Changes for Design Patterns in Java - Working Files/Chapter 10/src/com/scispike/observer/library/Observable.java: 23 added lines, 0 removed lines.
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		package com.scispike.observer.library;

		import java.util.HashSet;
		import java.util.Set;

		public abstract class Observable {
		private Set<Observer> observers;

		public Observable() {
		this.observers = new HashSet<Observer>();
		}
		public void addObserver(Observer o) {
		this.observers.add(o);
		}
		public void removeObserver(Observer o) {
		this.observers.remove(o);
		}
		protected void notifyDependents() {
		for (Observer observer : observers) {
		observer.update(this);
		}
		}
		}