/** Thread Runnable that handles received triggers */
@SuppressWarnings("nls")
@Override
public void run() {
try {
while (run) {
// Wait for a trigger
synchronized (mutex) {
while (triggers <= 0) {
mutex.wait();
}
}
// Wait a little longer, so in case of a burst, we update
// after already receiving more than just the start of the
// burst
Thread.sleep(initialMillis);
synchronized (mutex) {
triggers = 0;
}
if (run) {
fire();
}
// Suppress further updates a little to prevent flicker
Thread.sleep(suppressionMillis);
}
} catch (InterruptedException ex) {
SaveRestoreService.LOGGER.log(Level.SEVERE, "GUI Update failed", ex);
}
}
/**
* Returns the git username stored in the secured preferences for the given user. The user is
* usually the user that is logged in to CS-Studio. If no user is provided, system user is used.
*
* @param forUser the user for whom the username is to be retrieved
* @return the username if it exists, or null otherwise
*/
public static String getUsername(Optional<String> forUser) {
String user = forUser.orElse(System.getProperty(SYSTEM_PROPERTY_USER_NAME));
try {
return SecurePreferences.getSecurePreferences()
.node(Activator.ID)
.node(user)
.get(PREF_USERNAME, null);
} catch (StorageException | IOException e) {
SaveRestoreService.LOGGER.log(
Level.WARNING, "Could not read the username from secured storage.", e);
return null;
}
}
/**
* Stores the username and matching password for a particular user.
*
* @param forUser the user for whom the credentials are stored
* @param username the username to store
* @param password the password to store
*/
public static void storeCredentials(Optional<String> forUser, String username, char[] password) {
String user = forUser.orElse(System.getProperty(SYSTEM_PROPERTY_USER_NAME));
try {
ISecurePreferences prefs =
SecurePreferences.getSecurePreferences().node(Activator.ID).node(user);
if (username == null) {
return;
} else {
prefs.put(PREF_USERNAME, username, false);
}
if (password == null) {
prefs.node(username).remove(PREF_PASSWORD);
} else {
ByteBuffer buffer = StandardCharsets.UTF_8.newEncoder().encode(CharBuffer.wrap(password));
byte[] passwordData = Arrays.copyOfRange(buffer.array(), buffer.position(), buffer.limit());
prefs.node(username).putByteArray(PREF_PASSWORD, passwordData, false);
}
SaveRestoreService.LOGGER.log(
Level.FINE, "Stored new username and password for {0}.", new Object[] {user});
} catch (StorageException | IOException e) {
SaveRestoreService.LOGGER.log(Level.WARNING, "Could not store the username and password.", e);
}
}
/**
* Returns the password that is bound to the username and is stored for the specified <code>
* forUser</code> If the <code>forUser</code> is not specified the system user is used.
*
* @param forUser the user for whom the password is being retrieved
* @param username the matching username to go with the password
* @return the password as a character array or empty object if password could not be loaded
*/
public static Optional<char[]> getPassword(Optional<String> forUser, String username) {
if (username == null) {
return Optional.empty();
}
final String user = forUser.orElse(System.getProperty(SYSTEM_PROPERTY_USER_NAME));
try {
byte[] val =
SecurePreferences.getSecurePreferences()
.node(Activator.ID)
.node(user)
.node(username)
.getByteArray(PREF_PASSWORD, null);
if (val != null) {
CharBuffer buffer = StandardCharsets.UTF_8.newDecoder().decode(ByteBuffer.wrap(val));
return Optional.of(Arrays.copyOfRange(buffer.array(), buffer.position(), buffer.limit()));
}
} catch (StorageException | IOException e) {
SaveRestoreService.LOGGER.log(
Level.WARNING,
e,
() -> String.format("Could not read the password for '%s' from secured storage.", user));
}
return Optional.empty();
}
