zdm/envoy
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envoy
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Added offline mode to Client 

+ Saving the user ID in Settings
+ Loading the user ID from Settings in Client if the server can't be
reached
This commit is contained in:
Kai S. K. Engelbart 2019-12-11 18:52:30 +01:00
parent 6525b1b026
commit 0f64ce0a01
3 changed files with 73 additions and 36 deletions
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63
src/main/java/envoy/client/Client.java
View File

@ -10,6 +10,7 @@ import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import envoy.exception.EnvoyException;
import envoy.schema.ObjectFactory;
import envoy.schema.Sync;
import envoy.schema.User;
@ -29,14 +30,18 @@ public class Client {
private ObjectFactory objectFactory = new ObjectFactory();
private Config config;
private User sender, recipient;
private boolean online = false;
private static final Logger logger = Logger.getLogger(Client.class.getSimpleName());
public Client(Config config, String username) {
public Client(Config config, String userName) throws EnvoyException {
this.config = config;
sender = getUser(username);
logger.info("ID: " + sender.getID());
sender = getUser(userName);
// Update the user ID in the cache
Settings.getInstance().setUserID(sender.getID());
logger.info("Client user ID: " + sender.getID());
}
private <T, R> R post(String uri, T body, Class<R> responseBodyClass) {
@ -48,7 +53,6 @@ public class Client {
client.close();
return responseBody;
}
/**
@ -63,9 +67,7 @@ public class Client {
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 returnSendSync = post(String.format("%s:%d/envoy-server/rest/sync/syncData?userId=%d", config.getServer(), config.getPort(), 0),
sendSync,
Sync.class);
return returnSendSync;
@ -77,29 +79,33 @@ public class Client {
*
* @param name - the name of the {@link User}
* @return a {@link User} with the specified name
* @throws EnvoyException if the server does not return the requested ID
* @since Envoy v0.1-alpha
*/
private User getUser(String name) {
private User getUser(String name) throws EnvoyException {
// Create a sync with only a user with the requested name
Sync senderSync = objectFactory.createSync();
User user = objectFactory.createUser();
user.setName(name);
senderSync.getUsers().add(user);
Sync returnSenderSync = post(
String
.format("%s:%d/envoy-server/rest/sync/syncData?userId=%d", config.getServer(), config.getPort(), 0),
senderSync,
Sync.class);
try {
Sync sync = post(String.format("%s:%d/envoy-server/rest/sync/syncData?userId=%d", config.getServer(), config.getPort(), 0),
senderSync,
Sync.class);
User returnSender = objectFactory.createUser();
if (returnSenderSync.getUsers().size() == 1) {
returnSender = returnSenderSync.getUsers().get(0);
} else {
logger.warning("ERROR exiting...");
// Expecting a single user with an ID
if (sync.getUsers().size() == 1) {
online = true;
return sync.getUsers().get(0);
} else throw new EnvoyException("Unexpected response from Envoy Server");
} catch (Exception e) {
logger.warning("Could not connect to server, trying offline mode.");
if (Settings.getInstance().getUserID() != -1) {
user.setID(Settings.getInstance().getUserID());
return user;
} else throw new EnvoyException("Could not enter offline mode.");
}
return returnSender;
}
/**
@ -134,7 +140,8 @@ public class Client {
* their updated UserStatus to the client.) <br>
*
* @param userId the id of the {@link Client} who sends the {@link Sync}
* @param sync the sync object (yet to be converted from java class to sync.xml)
* @param sync the sync object (yet to be converted from java class to
* sync.xml)
* @return a returnSync.xml file
* @since Envoy v0.1-alpha
*/
@ -151,10 +158,7 @@ public class Client {
}
// Send sync
return post(String
.format("%s:%d/envoy-server/rest/sync/syncData?userId=%d", config.getServer(), config.getPort(), userId),
sync,
Sync.class);
return post(String.format("%s:%d/envoy-server/rest/sync/syncData?userId=%d", config.getServer(), config.getPort(), userId), sync, Sync.class);
}
/**
@ -182,4 +186,9 @@ public class Client {
* @since Envoy v0.1-alpha
*/
public boolean hasRecipient() { return recipient != null; }
/**
* @return {@code true} if a connection to the server could be established
*/
public boolean isOnline() { return online; }
}

25
src/main/java/envoy/client/Settings.java
View File

@ -27,6 +27,7 @@ public class Settings {
// Actual settings accessible by the rest of the application
private String username;
private long userID;
private String email;
private boolean enterToSend = true;
private Map<String, Theme> themes;
@ -66,6 +67,7 @@ public class Settings {
@SuppressWarnings("unchecked")
private void load() {
setUsername(prefs.get("username", ""));
setUserID(prefs.getLong("userID", -1));
setEmail(prefs.get("email", ""));
setEnterToSend(prefs.getBoolean("enterToSend", true));
setCurrentTheme(prefs.get("theme", "dark"));
@ -73,9 +75,9 @@ public class Settings {
// Load themes from theme file
try (ObjectInputStream in = new ObjectInputStream(new FileInputStream(themeFile))) {
Object obj = in.readObject();
if(obj instanceof HashMap) themes = (Map<String, Theme>) obj;
if (obj instanceof HashMap) themes = (Map<String, Theme>) obj;
} catch (IOException | ClassNotFoundException e) {
themes = new HashMap<>();
themes = new HashMap<>();
currentTheme = "dark";
e.printStackTrace();
}
@ -90,20 +92,21 @@ public class Settings {
}
/**
* updates prefs when save button is clicked
* Updates the preferences when the save button is clicked.
*
* @throws IOException
* @since Envoy v0.2-alpha
*/
public void save() throws IOException{
public void save() throws IOException {
prefs.put("username", getUsername());
prefs.putLong("userID", getUserID());
prefs.put("email", getEmail());
prefs.put("theme", currentTheme);
prefs.putBoolean("enterToSend", isEnterToSend());
// Save themes to theme file
themeFile.createNewFile();
try(ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream(themeFile))) {
try (ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream(themeFile))) {
out.writeObject(themes);
}
}
@ -145,6 +148,16 @@ public class Settings {
*/
public void setUsername(String username) { this.username = username; }
/**
* @return the userID
*/
public long getUserID() { return userID; }
/**
* @param userID the userID to set
*/
public void setUserID(long userID) { this.userID = userID; }
/**
* @return the email associated with that user.
* @since Envoy v0.2-alpha

21
src/main/java/envoy/client/ui/Startup.java
View File

@ -16,7 +16,7 @@ import envoy.exception.EnvoyException;
/**
* Starts the Envoy client and prompts the user to enter their name.
*
* <br>
* Project: <strong>envoy-client</strong><br>
* File: <strong>Startup.java</strong><br>
* Created: <strong>12 Oct 2019</strong><br>
@ -48,19 +48,34 @@ public class Startup {
// Override configuration values with command line arguments
if (args.length > 0) config.load(args);
// Check if all configuration values have been initialized
if (!config.isInitialized()) {
logger.severe("Server or port are not defined. Exiting...");
JOptionPane.showMessageDialog(null, "Error loading configuration values.", "Configuration error", JOptionPane.ERROR_MESSAGE);
System.exit(1);
}
// Ask the user for their user name
String userName = JOptionPane.showInputDialog("Please enter your username");
if (userName == null || userName.isEmpty()) {
logger.severe("User name is not set or empty. Exiting...");
System.exit(1);
}
Client client = new Client(config, userName);
LocalDB localDB = new LocalDB(client.getSender());
// Acquire the client user (with ID) either from the server or from the local
// cache (Preferences), which triggers offline mode
Client client;
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);
System.exit(1);
return;
}
// Load the local database
LocalDB localDB = new LocalDB(client.getSender());
try {
localDB.initializeDBFile(config.getLocalDB());
} catch (EnvoyException e) {