zdm/envoy
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Implemented offline mode for Client and LocalDB

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This commit is contained in:
Kai S. K. Engelbart
2019-12-14 10:53:20 +01:00
parent 27c420afdc
commit 2eb9c79106
4 changed files with 87 additions and 63 deletions
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28
src/main/java/envoy/client/Client.java
View File

@@ -1,6 +1,7 @@
package envoy.client;
import java.util.logging.Logger;
import java.util.HashMap;
import java.util.Map;
import javax.ws.rs.client.ClientBuilder;
import javax.ws.rs.client.Entity;
@@ -32,13 +33,11 @@ public class Client {
private User sender, recipient;
private boolean online = false;
private static final Logger logger = Logger.getLogger(Client.class.getSimpleName());
public Client(Config config) { this.config = config; }
public Client(Config config, String userName) throws EnvoyException {
this.config = config;
sender = getUser(userName);
logger.info("Client user ID: " + sender.getID());
public void onlineInit(String userName) throws EnvoyException {
sender = getUser(userName);
online = true;
}
private <T, R> R post(String uri, T body, Class<R> responseBodyClass) {
@@ -53,22 +52,25 @@ public class Client {
}
/**
* Returns a {@link Sync} with all users on the server.
* Returns a {@code Map<String, User>} of all users on the server with their
* user names as keys.
*
* @return Sync - List of all users on the server.
* @since Envoy v0.1-alpha
* @since Envoy v0.2-alpha
*/
public Sync getUsersListXml() {
public Map<String, User> getUsers() {
Sync sendSync = objectFactory.createSync();
User user = objectFactory.createUser();
user.setID(-1);
sendSync.getUsers().add(user);
Sync returnSendSync = post(String.format("%s:%d/envoy-server/rest/sync/syncData?userId=%d", config.getServer(), config.getPort(), 0),
Sync returnSync = post(String.format("%s:%d/envoy-server/rest/sync/syncData?userId=%d", config.getServer(), config.getPort(), 0),
sendSync,
Sync.class);
return returnSendSync;
Map<String, User> users = new HashMap<>();
returnSync.getUsers().forEach(u -> users.put(u.getName(), u));
return users;
}
/**
@@ -160,6 +162,8 @@ public class Client {
*/
public User getSender() { return sender; }
public void setSender(User sender) { this.sender = sender; }
/**
* @return the current recipient of the current chat.
* @since Envoy v0.1-alpha

34
src/main/java/envoy/client/LocalDB.java
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@@ -8,7 +8,9 @@ import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.time.Instant;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.logging.Logger;
import javax.xml.datatype.DatatypeConfigurationException;
@@ -34,9 +36,9 @@ import envoy.schema.User;
*/
public class LocalDB {
private File localDBFile, usersFile;
private File localDBDir, localDBFile, usersFile;
private User user;
private List<User> users = new ArrayList<>();
private Map<String, User> users = new HashMap<>();
private List<Chat> chats = new ArrayList<>();
private ObjectFactory objectFactory = new ObjectFactory();
@@ -54,12 +56,19 @@ public class LocalDB {
*
* @since Envoy v0.1-alpha
*/
public LocalDB() {
public LocalDB(File localDBDir) throws IOException {
this.localDBDir = localDBDir;
try {
datatypeFactory = DatatypeFactory.newInstance();
} catch (DatatypeConfigurationException e) {
e.printStackTrace();
}
// Initialize local database directory
if (localDBDir.exists() && !localDBDir.isDirectory())
throw new IOException(String.format("LocalDBDir '%s' is not a directory!", localDBDir.getAbsolutePath()));
usersFile = new File(localDBDir, "users.db");
}
/**
@@ -70,18 +79,9 @@ public class LocalDB {
* @throws EnvoyException if the directory selected is not an actual directory.
* @since Envoy v0.1-alpha
*/
public void initializeDBFile(File localDBDir) throws EnvoyException {
public void initializeDBFile() throws EnvoyException {
if (user == null) throw new NullPointerException("Client user is null");
if (localDBDir.exists() && !localDBDir.isDirectory())
throw new EnvoyException(String.format("LocalDBDir '%s' is not a directory!", localDBDir.getAbsolutePath()));
usersFile = new File(localDBDir, "users.db");
localDBFile = new File(localDBDir, user.getID() + ".db");
try {
loadUsers();
loadChats();
} catch (ClassNotFoundException | IOException e) {
throw new EnvoyException(e);
}
}
/**
@@ -99,7 +99,7 @@ public class LocalDB {
}
@SuppressWarnings("unchecked")
private void loadUsers() throws ClassNotFoundException, IOException { users = read(usersFile, ArrayList.class); }
public void loadUsers() throws ClassNotFoundException, IOException { users = read(usersFile, HashMap.class); }
/**
* Loads all chats saved by Envoy for the client user.
@@ -110,7 +110,7 @@ public class LocalDB {
* @since Envoy v0.1-alpha
*/
@SuppressWarnings("unchecked")
private void loadChats() throws ClassNotFoundException, IOException { chats = read(localDBFile, ArrayList.class); }
public void loadChats() throws ClassNotFoundException, IOException { chats = read(localDBFile, ArrayList.class); }
private <T> T read(File file, Class<T> serializedClass) throws ClassNotFoundException, IOException {
try (ObjectInputStream in = new ObjectInputStream(new FileInputStream(file))) {
@@ -308,12 +308,12 @@ public class LocalDB {
/**
* @return the users
*/
public List<User> getUsers() { return users; }
public Map<String, User> getUsers() { return users; }
/**
* @param users the users to set
*/
public void setUsers(List<User> users) { this.users = users; }
public void setUsers(Map<String, User> users) { this.users = users; }
/**
* @return all saved {@link Chat} objects that list the client user as the

31
src/main/java/envoy/client/ui/ChatWindow.java
View File

@@ -34,7 +34,6 @@ import envoy.client.Config;
import envoy.client.LocalDB;
import envoy.client.Settings;
import envoy.schema.Message;
import envoy.schema.Sync;
import envoy.schema.User;
/**
@@ -132,8 +131,7 @@ public class ChatWindow extends JFrame {
@Override
public void keyReleased(KeyEvent e) {
if (e.getKeyCode() == KeyEvent.VK_ENTER
&& ((Settings.getInstance().isEnterToSend() && e.getModifiersEx() == 0)
|| (e.getModifiersEx() == KeyEvent.CTRL_DOWN_MASK))) {
&& ((Settings.getInstance().isEnterToSend() && e.getModifiersEx() == 0) || (e.getModifiersEx() == KeyEvent.CTRL_DOWN_MASK))) {
postMessage(messageList);
}
}
@@ -181,8 +179,8 @@ public class ChatWindow extends JFrame {
settingsButton.addActionListener((evt) -> {
try {
SettingsScreen.open();
changeChatWindowColors(Settings.getInstance().getCurrentTheme());
} catch (Exception e) {
changeChatWindowColors(Settings.getInstance().getCurrentTheme());
} catch (Exception e) {
SettingsScreen.open();
logger.log(Level.WARNING, "An error occured while opening the settings screen", e);
e.printStackTrace();
@@ -235,7 +233,7 @@ public class ChatWindow extends JFrame {
gbc_userList.insets = new Insets(space, space, space, space);
changeChatWindowColors(Settings.getInstance().getCurrentTheme());
contentPane.add(userList, gbc_userList);
contentPane.revalidate();
@@ -244,7 +242,6 @@ public class ChatWindow extends JFrame {
contentPane.revalidate();
}
/**
* Used to immediately reload the ChatWindow when settings were changed.
@@ -287,18 +284,14 @@ public class ChatWindow extends JFrame {
private void postMessage(JList<Message> messageList) {
if (!client.hasRecipient()) {
JOptionPane.showMessageDialog(this,
"Please select a recipient!",
"Cannot send message",
JOptionPane.INFORMATION_MESSAGE);
JOptionPane.showMessageDialog(this, "Please select a recipient!", "Cannot send message", JOptionPane.INFORMATION_MESSAGE);
return;
}
if (!messageEnterTextArea.getText().isEmpty()) try {
// Create and send message object
final Message message = localDB.createMessage(messageEnterTextArea.getText(),
currentChat.getRecipient().getID());
final Message message = localDB.createMessage(messageEnterTextArea.getText(), currentChat.getRecipient().getID());
currentChat.appendMessage(message);
messageList.setModel(currentChat.getModel());
@@ -322,9 +315,8 @@ public class ChatWindow extends JFrame {
*/
private void loadUsersAndChats() {
new Thread(() -> {
Sync users = client.getUsersListXml();
DefaultListModel<User> userListModel = new DefaultListModel<>();
users.getUsers().forEach(user -> {
DefaultListModel<User> userListModel = new DefaultListModel<>();
localDB.getUsers().values().forEach(user -> {
userListModel.addElement(user);
// Check if user exists in local DB
@@ -348,8 +340,7 @@ public class ChatWindow extends JFrame {
new Thread(() -> {
// Synchronize
localDB.applySync(
client.sendSync(client.getSender().getID(), localDB.fillSync(client.getSender().getID())));
localDB.applySync(client.sendSync(client.getSender().getID(), localDB.fillSync(client.getSender().getID())));
// Process unread messages
localDB.addUnreadMessagesToLocalDB();
@@ -359,8 +350,7 @@ public class ChatWindow extends JFrame {
readCurrentChat();
// Update UI
SwingUtilities
.invokeLater(() -> { updateUserStates(); contentPane.revalidate(); contentPane.repaint(); });
SwingUtilities.invokeLater(() -> { updateUserStates(); contentPane.revalidate(); contentPane.repaint(); });
}).start();
}).start();
}
@@ -377,4 +367,3 @@ public class ChatWindow extends JFrame {
*/
private void readCurrentChat() { if (currentChat != null) { localDB.setMessagesToRead(currentChat); } }
}

57
src/main/java/envoy/client/ui/Startup.java
View File

@@ -1,6 +1,7 @@
package envoy.client.ui;
import java.awt.EventQueue;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
@@ -10,6 +11,7 @@ import envoy.client.Client;
import envoy.client.Config;
import envoy.client.LocalDB;
import envoy.exception.EnvoyException;
import envoy.schema.User;
/**
* Starts the Envoy client and prompts the user to enter their name.
@@ -54,32 +56,61 @@ public class Startup {
logger.severe("User name is not set or empty. Exiting...");
System.exit(1);
}
// Acquire the client user (with ID) either from the server or from the local
// database, which triggers offline mode
Client client;
// Initialize the local database
LocalDB localDB;
try {
client = new Client(config, userName);
} catch (Exception e1) {
logger.log(Level.SEVERE, "Failed to acquire client user ID", e1);
JOptionPane.showMessageDialog(null, e1.toString(), "Client error", JOptionPane.ERROR_MESSAGE);
localDB = new LocalDB(config.getLocalDB());
} catch (IOException e3) {
logger.log(Level.SEVERE, "Could not initialize local database", e3);
JOptionPane.showMessageDialog(null, "Could not initialize local database!\n" + e3.toString());
System.exit(1);
return;
}
// Load the local database
LocalDB localDB = new LocalDB();
localDB.setUser(client.getSender());
// Acquire the client user (with ID) either from the server or from the local
// database, which triggers offline mode
Client client = new Client(config);
try {
localDB.initializeDBFile(config.getLocalDB());
} catch (EnvoyException e) {
// Try entering online mode first
client.onlineInit(userName);
} catch (Exception e1) {
logger.warning("Could not connect to server. Trying offline mode...");
try {
// Try entering offline mode
localDB.loadUsers();
User clientUser = localDB.getUsers().get(userName);
if(clientUser == null)
throw new EnvoyException("Could not enter offline mode: user name unknown");
client.setSender(clientUser);
} catch(Exception e2) {
JOptionPane.showMessageDialog(null, e1.toString(), "Client error", JOptionPane.ERROR_MESSAGE);
System.exit(1);
return;
}
}
// Set client user in local database
localDB.setUser(client.getSender());
// Initialize chats in local database
try {
localDB.initializeDBFile();
localDB.loadChats();
} catch (EnvoyException | ClassNotFoundException | IOException e) {
e.printStackTrace();
JOptionPane.showMessageDialog(null,
"Error while loading local database: " + e.toString() + "\nChats will not be stored locally.",
"Local DB error",
JOptionPane.WARNING_MESSAGE);
}
logger.info("Client user ID: " + client.getSender().getID());
// Save all users to the local database
if(client.isOnline())
localDB.setUsers(client.getUsers());
EventQueue.invokeLater(() -> {
try {
ChatWindow chatWindow = new ChatWindow(client, localDB);