zdm/envoy
zdm/envoy
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Fixed Bug Not Saving Values When Exiting via “Control”+”Q” (#40)

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Fixed bug not saving values when exiting via "Control"+"Q"
Reviewed-on: https://git.kske.dev/zdm/envoy/pulls/40
Reviewed-by: kske <kai@kske.dev>
This commit is contained in:
Leon Hofmeister 2020-09-22 14:42:51 +02:00
parent 8ed6faca96
commit 1b60ab3f0d
7 changed files with 87 additions and 64 deletions
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42
client/src/main/java/envoy/client/data/LocalDB.java
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@ -5,11 +5,13 @@ import java.nio.channels.*;
import java.nio.file.StandardOpenOption;
import java.time.Instant;
import java.util.*;
import java.util.logging.Level;
import envoy.client.event.EnvoyCloseEvent;
import envoy.data.*;
import envoy.event.*;
import envoy.exception.EnvoyException;
import envoy.util.SerializationUtils;
import envoy.util.*;
import dev.kske.eventbus.Event;
import dev.kske.eventbus.EventBus;
@ -42,12 +44,13 @@ public final class LocalDB implements EventListener {
private Instant lastSync = Instant.EPOCH;
// Persistence
private File dbDir, userFile, idGeneratorFile, lastLoginFile, usersFile;
private File userFile;
private FileLock instanceLock;
private final File dbDir, idGeneratorFile, lastLoginFile, usersFile;
/**
* Constructs an empty local database. To serialize any user-specific data to
* the file system, call {@link LocalDB#save(boolean)}.
* Constructs an empty local database.
*
* @param dbDir the directory in which to persist data
* @throws IOException if {@code dbDir} is a file (and not a directory)
@ -59,9 +62,8 @@ public final class LocalDB implements EventListener {
EventBus.getInstance().registerListener(this);
// Ensure that the database directory exists
if (!dbDir.exists()) {
dbDir.mkdirs();
} else if (!dbDir.isDirectory()) throw new IOException(String.format("LocalDBDir '%s' is not a directory!", dbDir.getAbsolutePath()));
if (!dbDir.exists()) dbDir.mkdirs();
else if (!dbDir.isDirectory()) throw new IOException(String.format("LocalDBDir '%s' is not a directory!", dbDir.getAbsolutePath()));
// Lock the directory
lock();
@ -88,12 +90,12 @@ public final class LocalDB implements EventListener {
* @since Envoy Client v0.2-beta
*/
private synchronized void lock() throws EnvoyException {
File file = new File(dbDir, "instance.lock");
final var file = new File(dbDir, "instance.lock");
try {
FileChannel fc = FileChannel.open(file.toPath(), StandardOpenOption.CREATE, StandardOpenOption.WRITE);
final var fc = FileChannel.open(file.toPath(), StandardOpenOption.CREATE, StandardOpenOption.WRITE);
instanceLock = fc.tryLock();
if (instanceLock == null) throw new EnvoyException("Another Envoy instance is using this local database!");
} catch (IOException e) {
} catch (final IOException e) {
throw new EnvoyException("Could not create lock file!", e);
}
}
@ -146,9 +148,8 @@ public final class LocalDB implements EventListener {
users.put(user.getName(), user);
// Synchronize user status data
for (Contact contact : users.values())
if (contact instanceof User)
getChat(contact.getID()).ifPresent(chat -> { ((User) chat.getRecipient()).setStatus(((User) contact).getStatus()); });
for (final var contact : users.values())
if (contact instanceof User) getChat(contact.getID()).ifPresent(chat -> { ((User) chat.getRecipient()).setStatus(contact.getStatus()); });
// Create missing chats
user.getContacts()
@ -162,25 +163,30 @@ public final class LocalDB implements EventListener {
* Stores all users. If the client user is specified, their chats will be stored
* as well. The message id generator will also be saved if present.
*
* @param isOnline determines which {@code lastSync} time stamp is saved
* @throws IOException if the saving process failed
* @since Envoy Client v0.3-alpha
*/
public synchronized void save(boolean isOnline) throws IOException {
@Event(eventType = EnvoyCloseEvent.class, priority = 1000)
private synchronized void save() {
EnvoyLog.getLogger(LocalDB.class).log(Level.INFO, "Saving local database...");
// Save users
try {
SerializationUtils.write(usersFile, users);
// Save user data and last sync time stamp
if (user != null) SerializationUtils.write(userFile, chats, cacheMap, isOnline ? Instant.now() : lastSync);
if (user != null)
SerializationUtils.write(userFile, chats, cacheMap, Context.getInstance().getClient().isOnline() ? Instant.now() : lastSync);
// Save last login information
if (authToken != null) SerializationUtils.write(lastLoginFile, user, authToken);
// Save id generator
// Save ID generator
if (hasIDGenerator()) SerializationUtils.write(idGeneratorFile, idGenerator);
} catch (final IOException e) {
EnvoyLog.getLogger(LocalDB.class).log(Level.SEVERE, "Unable to save local database: ", e);
}
}
@Event
private void onNewAuthToken(NewAuthToken evt) { authToken = evt.get(); }

19
client/src/main/java/envoy/client/data/Settings.java
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@ -2,9 +2,14 @@ package envoy.client.data;
import java.io.*;
import java.util.*;
import java.util.logging.Level;
import java.util.prefs.Preferences;
import envoy.util.SerializationUtils;
import envoy.client.event.EnvoyCloseEvent;
import envoy.util.*;
import dev.kske.eventbus.*;
import dev.kske.eventbus.EventListener;
/**
* Manages all application settings, which are different objects that can be
@ -20,7 +25,7 @@ import envoy.util.SerializationUtils;
* @author Kai S. K. Engelbart
* @since Envoy Client v0.2-alpha
*/
public final class Settings {
public final class Settings implements EventListener {
// Actual settings accessible by the rest of the application
private Map<String, SettingsItem<?>> items;
@ -42,6 +47,8 @@ public final class Settings {
* @since Envoy Client v0.2-alpha
*/
private Settings() {
EventBus.getInstance().registerListener(this);
// Load settings from settings file
try {
items = SerializationUtils.read(settingsFile, HashMap.class);
@ -65,10 +72,16 @@ public final class Settings {
* @throws IOException if an error occurs while saving the themes
* @since Envoy Client v0.2-alpha
*/
public void save() throws IOException {
@Event(eventType = EnvoyCloseEvent.class, priority = 900)
private void save() {
EnvoyLog.getLogger(Settings.class).log(Level.INFO, "Saving settings...");
// Save settings to settings file
try {
SerializationUtils.write(settingsFile, items);
} catch (final IOException e) {
EnvoyLog.getLogger(Settings.class).log(Level.SEVERE, "Unable to save settings file: ", e);
}
}
private void supplementDefaults() {

16
client/src/main/java/envoy/client/event/EnvoyCloseEvent.java Normal file
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@ -0,0 +1,16 @@
package envoy.client.event;
import envoy.event.Event.Valueless;
/**
* This event will be sent once Envoy is <strong>really</strong> closed.
* Its purpose is to forcefully stop other threads peacefully so that the VM can
* shutdown too.
*
* @author Leon Hofmeister
* @since Envoy Client v0.2-beta
*/
public class EnvoyCloseEvent extends Valueless {
private static final long serialVersionUID = 1L;
}

16
client/src/main/java/envoy/client/net/Client.java
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@ -6,7 +6,7 @@ import java.util.concurrent.TimeoutException;
import java.util.logging.*;
import envoy.client.data.*;
import envoy.client.event.SendEvent;
import envoy.client.event.*;
import envoy.data.*;
import envoy.event.*;
import envoy.event.Event;
@ -49,9 +49,7 @@ public final class Client implements EventListener, Closeable {
*
* @since Envoy Client v0.2-beta
*/
public Client() {
eventBus.registerListener(this);
}
public Client() { eventBus.registerListener(this); }
/**
* Enters the online mode by acquiring a user ID from the server. As a
@ -236,7 +234,15 @@ public final class Client implements EventListener, Closeable {
}
@Override
public void close() throws IOException { if (online) socket.close(); }
@dev.kske.eventbus.Event(eventType = EnvoyCloseEvent.class, priority = 800)
public void close() {
if (online) {
logger.log(Level.INFO, "Closing connection...");
try {
socket.close();
} catch (final IOException e) {}
}
}
private void writeObject(Object obj) throws IOException {
checkOnline();

11
client/src/main/java/envoy/client/net/Receiver.java
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@ -2,14 +2,11 @@ package envoy.client.net;
import java.io.*;
import java.net.SocketException;
import java.util.HashMap;
import java.util.Map;
import java.util.*;
import java.util.function.Consumer;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.logging.*;
import envoy.util.EnvoyLog;
import envoy.util.SerializationUtils;
import envoy.util.*;
/**
* Receives objects from the server and passes them to processor objects based
@ -90,7 +87,7 @@ public final class Receiver extends Thread {
}
} catch (final SocketException | EOFException e) {
// Connection probably closed by client.
logger.log(Level.FINER, "Exiting receiver...");
logger.log(Level.INFO, "Exiting receiver...");
return;
} catch (final Exception e) {
logger.log(Level.SEVERE, "Error on receiver thread", e);

7
client/src/main/java/envoy/client/ui/SceneContext.java
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@ -11,7 +11,7 @@ import javafx.scene.input.*;
import javafx.stage.Stage;
import envoy.client.data.Settings;
import envoy.client.event.ThemeChangeEvent;
import envoy.client.event.*;
import envoy.util.EnvoyLog;
import dev.kske.eventbus.*;
@ -114,7 +114,10 @@ public final class SceneContext implements EventListener {
// Presumably no Settings are loaded in the login scene, hence Envoy is closed
// directly
if (sceneInfo != SceneInfo.LOGIN_SCENE && settings.isHideOnClose()) stage.setIconified(true);
else System.exit(0);
else {
EventBus.getInstance().dispatch(new EnvoyCloseEvent());
System.exit(0);
}
});
// The LoginScene is the only scene not intended to be resized

26
client/src/main/java/envoy/client/ui/Startup.java
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@ -11,6 +11,7 @@ import javafx.scene.control.Alert.AlertType;
import javafx.stage.Stage;
import envoy.client.data.*;
import envoy.client.event.EnvoyCloseEvent;
import envoy.client.net.Client;
import envoy.client.ui.SceneContext.SceneInfo;
import envoy.client.ui.controller.LoginScene;
@ -20,6 +21,8 @@ import envoy.event.*;
import envoy.exception.EnvoyException;
import envoy.util.EnvoyLog;
import dev.kske.eventbus.EventBus;
/**
* Handles application startup and shutdown.
* <p>
@ -213,7 +216,7 @@ public final class Startup extends Application {
if (Settings.getInstance().isHideOnClose()) {
stage.setIconified(true);
e.consume();
}
} else EventBus.getInstance().dispatch(new EnvoyCloseEvent());
});
// Initialize status tray icon
@ -224,25 +227,4 @@ public final class Startup extends Application {
});
}
}
/**
* Closes the client connection and saves the local database and settings.
*
* @since Envoy Client v0.1-beta
*/
@Override
public void stop() {
try {
logger.log(Level.INFO, "Saving local database and settings...");
localDB.save(client.isOnline());
Settings.getInstance().save();
if (client.isOnline()) logger.log(Level.INFO, "Closing connection...");
client.close();
logger.log(Level.INFO, "Envoy was terminated by its user");
} catch (final Exception e) {
logger.log(Level.SEVERE, "Unable to save local files: ", e);
}
}
}