/**
* Load the user quota details
*
* @param userName - name of the user.
* @return UserQuotaDetails
* @throws QuotaManagerException
*/
private UserQuotaDetails loadUsageDetails(String userName) throws QuotaManagerException {
// Check if the user name is available
UserQuotaDetails quotaDetails = null;
try {
if (userName == null || userName.length() == 0) {
logger.debug("user name is null or empty - throw QuotaManagerException");
throw new QuotaManagerException("No user name for client");
}
// Get the usage quota and current usage values for the user
long userQuota = m_usageService.getUserQuota(userName);
long userUsage = m_usageService.getUserUsage(userName);
// Create the user quota details for live tracking
quotaDetails = new UserQuotaDetails(userName, userQuota);
if (userUsage > 0L) {
quotaDetails.setCurrentUsage(userUsage);
}
// Add the details to the live tracking table
// Check if another thread has added the details
UserQuotaDetails details = m_liveUsage.get(userName);
if (details != null) {
quotaDetails = details;
} else {
m_liveUsage.put(userName, quotaDetails);
}
// DEBUG
if (logger.isDebugEnabled()) {
logger.debug("Added live usage tracking " + quotaDetails);
}
} catch (Exception ex) {
// Log the error
if (logger.isDebugEnabled()) {
logger.debug("Failed to load usage for" + userName, ex);
}
// Failed to load usage details
throw new QuotaManagerException("Failed to load usage for " + userName + ", " + ex);
}
// Return the user usage details
return quotaDetails;
}
/**
* Release space to the free space for the filesystem.
*
* @param sess SrvSession
* @param tree TreeConnection
* @param fid int
* @param path String
* @param alloc long
* @exception IOException
*/
public void releaseSpace(SrvSession sess, TreeConnection tree, int fid, String path, long alloc)
throws IOException {
// Check if content usage is enabled
if (m_usageService.getEnabled() == false) return;
// Check if there is a live usage record for the user
UserQuotaDetails userQuota = getQuotaDetails(sess, true);
if (userQuota != null) {
synchronized (userQuota) {
// Release the space from the live usage value
userQuota.subtractFromCurrentUsage(alloc);
}
// DEBUG
if (logger.isDebugEnabled())
logger.debug("Released " + alloc + " bytes, userQuota=" + userQuota);
} else if (logger.isDebugEnabled())
logger.debug("Failed to release " + alloc + " bytes for sess " + sess.getUniqueId());
}
/**
* Allocate space on the filesystem.
*
* @param sess SrvSession
* @param tree TreeConnection
* @param file NetworkFile
* @param alloc long requested allocation size
* @return long granted allocation size
* @exception IOException
*/
public long allocateSpace(SrvSession sess, TreeConnection tree, NetworkFile file, long alloc)
throws IOException {
// Check if content usage is enabled
if (m_usageService.getEnabled() == false) return alloc;
// Check if there is a live usage record for the user
UserQuotaDetails userQuota = getQuotaDetails(sess, true);
long allowedAlloc = 0L;
if (userQuota != null) {
// Check if the user has a usage quota
synchronized (userQuota) {
if (userQuota.hasUserQuota()) {
// Check if the user has enough free space allocation
if (alloc > 0 && userQuota.getAvailableSpace() >= alloc) {
userQuota.addToCurrentUsage(alloc);
allowedAlloc = alloc;
}
} else {
// Update the live usage
userQuota.addToCurrentUsage(alloc);
allowedAlloc = alloc;
}
}
} else if (logger.isDebugEnabled())
logger.debug("Failed to allocate " + alloc + " bytes for sess " + sess.getUniqueId());
// Check if the allocation was allowed
if (allowedAlloc < alloc) {
// DEBUG
if (logger.isDebugEnabled()) logger.debug("Allocation failed userQuota=" + userQuota);
throw new DiskFullException();
} else if (logger.isDebugEnabled())
logger.debug("Allocated " + alloc + " bytes, userQuota=" + userQuota);
// Return the allocation size
return allowedAlloc;
}
/**
* Return the quota space available to the specified user/session
*
* @param sess SrvSession
* @param tree TreeConnection
* @return long
*/
public long getUserTotalSpace(SrvSession sess, TreeConnection tree) {
// Check if content usage is enabled
if (m_usageService.getEnabled() == false) return -1L;
UserQuotaDetails userQuota = getQuotaDetails(sess, true);
if (userQuota != null) {
synchronized (userQuota) {
return userQuota.getUserQuota();
}
}
// No quota details available
return -1L;
}