Rogue: Savage Rats, a retro-themed dungeon crawler
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rogue-savage-rats/src/mightypork/gamecore/core/modules/BaseApp.java

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package mightypork.gamecore.core.modules;
import java.io.File;
import java.io.IOException;
import java.lang.Thread.UncaughtExceptionHandler;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import javax.swing.JOptionPane;
import mightypork.gamecore.core.Config;
import mightypork.gamecore.core.Config.ConfigSetup;
import mightypork.gamecore.core.Config.KeySetup;
import mightypork.gamecore.core.WorkDir;
import mightypork.gamecore.core.WorkDir.RouteSetup;
import mightypork.gamecore.gui.screens.ScreenRegistry;
import mightypork.gamecore.gui.screens.impl.CrossfadeOverlay;
import mightypork.gamecore.input.InputSystem;
import mightypork.gamecore.render.DisplaySystem;
import mightypork.gamecore.resources.AsyncResourceLoader;
import mightypork.gamecore.resources.Res;
import mightypork.gamecore.resources.ResourceLoader;
import mightypork.gamecore.resources.ResourceSetup;
import mightypork.gamecore.resources.audio.SoundSystem;
import mightypork.gamecore.util.SlickLogRedirector;
import mightypork.utils.annotations.DefaultImpl;
import mightypork.utils.eventbus.EventBus;
import mightypork.utils.eventbus.events.DestroyEvent;
import mightypork.utils.files.InstanceLock;
import mightypork.utils.ion.Ion;
import mightypork.utils.ion.IonInput;
import mightypork.utils.ion.IonOutput;
import mightypork.utils.ion.IonizerBinary;
import mightypork.utils.logging.Log;
import mightypork.utils.logging.writers.LogWriter;
import mightypork.utils.math.algo.Coord;
import mightypork.utils.math.algo.Move;
/**
* Basic screen-based game with subsystems.<br>
* This class takes care of the initialization sequence.
*
* @author Ondřej Hruška (MightyPork)
*/
public abstract class BaseApp implements AppAccess, UncaughtExceptionHandler {
/**
* Init options holder class
*/
public class AppInitOptions {
private String logDir = "log";
private String logFilePrefix = "runtime";
private String screenshotDir = "screenshots";
private int logArchiveCount = 0;
private boolean busLogging = false;
private String configFile = "settings.cfg";
private String configComment = "Main config file";
public String lockFile = ".lock";
private final List<ResourceSetup> resourceLists = new ArrayList<>();
private final List<Config.KeySetup> keyLists = new ArrayList<>();
private final List<ConfigSetup> configLists = new ArrayList<>();
private final List<RouteSetup> routeLists = new ArrayList<>();
private ResourceLoader resourceLoader = new AsyncResourceLoader();
private Level logLevel = Level.ALL;
public boolean sigleInstance;
private Level logSoutLevel;
public void setConfigFile(String filename, String comment)
{
configFile = filename;
configComment = comment;
}
public void addConfig(ConfigSetup cfg)
{
configLists.add(cfg);
}
public void addKeys(Config.KeySetup keys)
{
keyLists.add(keys);
}
public void addRoutes(RouteSetup keys)
{
routeLists.add(keys);
}
public void addResources(ResourceSetup res)
{
resourceLists.add(res);
}
public void setBusLogging(boolean yes)
{
busLogging = yes;
}
public void setLogOptions(String logDir, String filePrefix, int archivedCount, Level logLevel)
{
this.logDir = logDir;
this.logFilePrefix = filePrefix;
this.logArchiveCount = archivedCount;
this.logLevel = logLevel;
}
public void setResourceLoader(ResourceLoader resLoader)
{
resourceLoader = resLoader;
}
public void setScreenshotDir(String path)
{
this.screenshotDir = path;
}
public void setLockFile(String lockFile)
{
this.lockFile = lockFile;
}
public void setLogLevel(Level logLevel, Level soutLevel)
{
this.logLevel = logLevel;
this.logSoutLevel = soutLevel;
}
}
// modules
private InputSystem inputSystem;
private DisplaySystem displaySystem;
private SoundSystem soundSystem;
private EventBus eventBus;
private MainLoop gameLoop;
private ScreenRegistry screenRegistry;
private boolean started = false;
private boolean lockObtained = false;
// init opt holder
private final AppInitOptions opt = new AppInitOptions();
/**
* Get init options
*
* @return opt holder
*/
public AppInitOptions getInitOptions()
{
if (started) {
throw new IllegalStateException("Cannot alter init options after starting the App.");
}
return opt;
}
public BaseApp(File workdir, boolean singleInstance)
{
WorkDir.init(workdir);
opt.sigleInstance = singleInstance;
}
/**
* Start the application
*/
public final void start()
{
Thread.setDefaultUncaughtExceptionHandler(this);
initialize();
Log.i("Starting main loop...");
// open first screen
started = true;
gameLoop.start();
}
/**
* Init the app
*/
protected void initialize()
{
if (opt.sigleInstance) initLock();
lockObtained = true;
for (final RouteSetup rs : opt.routeLists) {
WorkDir.registerRoutes(rs);
}
WorkDir.addPath("_screenshot_dir", opt.screenshotDir);
// apply configurations
Config.init(WorkDir.getFile(opt.configFile), opt.configComment);
// add keys to config
for (final KeySetup l : opt.keyLists) {
Config.registerKeys(l);
}
// add options to config
for (final ConfigSetup c : opt.configLists) {
Config.registerOptions(c);
}
Config.load();
/*
* Setup logging
*/
final LogWriter log = Log.create(opt.logFilePrefix, new File(WorkDir.getDir(opt.logDir), opt.logFilePrefix + ".log"), opt.logArchiveCount);
Log.setMainLogger(log);
Log.setLevel(opt.logLevel);
Log.setSysoutLevel(opt.logSoutLevel);
// connect slickutil to the logger
org.newdawn.slick.util.Log.setLogSystem(new SlickLogRedirector(log));
writeLogHeader();
Log.i("=== Starting initialization sequence ===");
// pre-init hook
Log.f2("Calling pre-init hook...");
preInit();
/*
* Event bus
*/
Log.f2("Starting Event Bus...");
eventBus = new EventBus();
eventBus.subscribe(this);
eventBus.detailedLogging = opt.busLogging;
/*
* Ionizables
*/
Log.f3("Initializing ION save system...");
registerIonizables();
/*
* Display
*/
Log.f2("Initializing Display System...");
displaySystem = new DisplaySystem(this);
initDisplay(displaySystem);
/*
* Audio
*/
Log.f2("Initializing Sound System...");
soundSystem = new SoundSystem(this);
initSoundSystem(soundSystem);
/*
* Input
*/
Log.f2("Initializing Input System...");
inputSystem = new InputSystem(this);
initInputSystem(inputSystem);
/*
* Prepare main loop
*/
Log.f1("Creating Screen Registry and Game Loop...");
screenRegistry = new ScreenRegistry(this);
gameLoop = createMainLoop();
gameLoop.setRootRenderable(screenRegistry);
/*
* Load resources
*
* Resources should be registered to registries, and AsyncResourceLoader will load them.
*/
Log.f1("Loading resources...");
if (opt.resourceLoader != null) {
opt.resourceLoader.init(this);
}
Res.init(this);
for (final ResourceSetup rl : opt.resourceLists) {
Res.load(rl);
}
/*
* Screen registry
*
* Must be after resources, because screens can request them during instantiation.
*/
Log.f2("Registering screens...");
initScreens(screenRegistry);
postInit();
Log.i("=== Initialization sequence completed ===");
}
protected void writeLogHeader()
{
logSystemInfo();
}
protected void logSystemInfo()
{
String txt = "";
txt += "\n### SYSTEM INFO ###\n\n";
txt += " Platform ...... " + System.getProperty("os.name") + "\n";
txt += " Runtime ....... " + System.getProperty("java.runtime.name") + "\n";
txt += " Java .......... " + System.getProperty("java.version") + "\n";
txt += " Launch path ... " + System.getProperty("user.dir") + "\n";
try {
txt += " Workdir ....... " + WorkDir.getWorkDir().getCanonicalPath() + "\n";
} catch (final IOException e) {
Log.e(e);
}
Log.i(txt);
}
protected void registerIonizables()
{
Ion.registerIndirect(255, new IonizerBinary<Coord>() {
@Override
public void save(Coord object, IonOutput out) throws IOException
{
out.writeInt(object.x);
out.writeInt(object.y);
}
@Override
public Coord load(IonInput in) throws IOException
{
final int x = in.readInt();
final int y = in.readInt();
return new Coord(x, y);
}
});
Ion.registerIndirect(254, new IonizerBinary<Move>() {
@Override
public void save(Move object, IonOutput out) throws IOException
{
out.writeInt(object.x());
out.writeInt(object.y());
}
@Override
public Move load(IonInput in) throws IOException
{
final int x = in.readInt();
final int y = in.readInt();
return new Move(x, y);
}
});
}
/**
* Called at the beginning of the initialization sequence, right after lock
* was obtained.
*/
@DefaultImpl
protected void preInit()
{
}
/**
* Called at the end of init sequence, before main loop starts.
*/
@DefaultImpl
protected void postInit()
{
}
/**
* Create window and configure display system
*
* @param display
*/
@DefaultImpl
protected void initDisplay(DisplaySystem display)
{
display.createMainWindow(800, 600, true, false, "LWJGL game");
display.setTargetFps(60);
}
/**
* Configure sound system (ie. adjust volume)
*
* @param audio
*/
@DefaultImpl
protected void initSoundSystem(SoundSystem audio)
{
}
/**
* Register game screens to the registry.
*
* @param screens
*/
protected void initScreens(ScreenRegistry screens)
{
screens.addOverlay(new CrossfadeOverlay(this));
}
/**
* Create game loop instance
*
* @return the game loop.
*/
protected MainLoop createMainLoop()
{
return new MainLoop(this);
}
/*
* Try to obtain lock.
*/
private void initLock()
{
final File lock = WorkDir.getFile(opt.lockFile);
if (!InstanceLock.onFile(lock)) {
onLockError();
return;
}
}
@DefaultImpl
protected void initInputSystem(InputSystem input)
{
}
/**
* Triggered when lock cannot be obtained.<br>
* App should terminate gracefully.
*/
protected void onLockError()
{
Log.e("Could not obtain lock file.\nOnly one instance can run at a time.");
//@formatter:off
JOptionPane.showMessageDialog(
null,
"Another instance is already running.\n(Delete the "+opt.lockFile +" file in the working directory to override)",
"Lock Error",
JOptionPane.ERROR_MESSAGE
);
//@formatter:on
shutdown();
}
@Override
public final SoundSystem getSoundSystem()
{
return soundSystem;
}
@Override
public final InputSystem getInput()
{
return inputSystem;
}
@Override
public final DisplaySystem getDisplay()
{
return displaySystem;
}
@Override
public final EventBus getEventBus()
{
return eventBus;
}
protected void beforeShutdown()
{
if (lockObtained) Config.save();
}
@Override
public final void uncaughtException(Thread t, Throwable e)
{
onCrash(e);
}
protected void onCrash(Throwable e)
{
Log.e("The game has crashed.", e);
shutdown();
}
@Override
public final void shutdown()
{
beforeShutdown();
Log.i("Shutting down subsystems...");
try {
if (getEventBus() != null) {
getEventBus().send(new DestroyEvent());
getEventBus().destroy();
}
} catch (final Throwable e) {
Log.e(e);
}
Log.i("Terminating...");
System.exit(0);
}
}