/**
* Refresh locks held by the authorization <code>authID</code>.
*
* <p>(remember that the lock may have expired)
*
* @param authID Authorization identifing Lock to refresh
* @param transaction Transaction with authorization for lockID
* @return <code>true</code> if lock was found and refreshed
* @throws IOException If transaction not authorized to refresh authID
* @throws IllegalArgumentException If authID or transaction not provided
*/
public synchronized boolean refresh(String authID, Transaction transaction) throws IOException {
if (authID == null) {
throw new IllegalArgumentException("lockID required");
}
if ((transaction == null) || (transaction == Transaction.AUTO_COMMIT)) {
throw new IllegalArgumentException(
"Tansaction required (with authorization for " + authID + ")");
}
Lock lock;
boolean refresh = false;
for (Iterator i = allLocks().iterator(); i.hasNext(); ) {
lock = (Lock) i.next();
if (lock.isExpired()) {
i.remove();
} else if (lock.isMatch(authID)) {
if (lock.isAuthorized(transaction)) {
lock.refresh();
refresh = true;
} else {
throw new IOException("Not authorized to refresh " + lock);
}
}
}
return refresh;
}
/**
* Lock for typeName & featureID if it exists.
*
* <p>This method will not return expired locks.
*
* @param typeName
* @param featureID
* @return Lock if exists, or null
*/
protected Lock getLock(String typeName, String featureID) {
Map locks = locks(typeName);
// LOGGER.info("checking for lock " + typeName + ", " + featureID
// + " in locks " + locks);
synchronized (locks) {
if (locks.containsKey(featureID)) {
Lock lock = (Lock) locks.get(featureID);
if (lock.isExpired()) {
locks.remove(featureID);
// LOGGER.info("returning null");
return null;
} else {
// LOGGER.info("returing " + lock);
return lock;
}
} else {
// LOGGER.info("locks did not contain key, returning null");
// not found
return null;
}
}
}
/**
* Release locks held by the authorization <code>authID</code>.
*
* <p>(remember that the lock may have expired)
*
* @param authID Authorization identifing Lock to release
* @param transaction Transaction with authorization for lockID
* @return <code>true</code> if lock was found and released
* @throws IOException If transaction not authorized to release authID
* @throws IllegalArgumentException If authID or transaction not provided
*/
public boolean release(String authID, Transaction transaction) throws IOException {
// LOGGER.info("release called on lock: " + authID + ", trans: "
// + transaction);
if (authID == null) {
throw new IllegalArgumentException("lockID required");
}
if ((transaction == null) || (transaction == Transaction.AUTO_COMMIT)) {
throw new IllegalArgumentException(
"Tansaction required (with authorization for " + authID + ")");
}
Lock lock;
boolean release = false;
// This could be done more efficiently, and perhaps cleaner,
// but these maps within a map are just nasty. The previous way of
// calling iterator.remove() didn't actually remove anything, as it
// was only iterating through the values of a map, which I believe
// java just copies, so it's immutable. Or perhaps we just moved
// through too many iterator layers...
for (Iterator i = lockTables.values().iterator(); i.hasNext(); ) {
Map fidMap = (Map) i.next();
Set unLockedFids = new HashSet();
for (Iterator j = fidMap.keySet().iterator(); j.hasNext(); ) {
String fid = (String) j.next();
lock = (Lock) fidMap.get(fid);
// LOGGER.info("checking lock " + lock + ", is match "
// + lock.isMatch(authID));
if (lock.isExpired()) {
unLockedFids.add(fid);
// fidMap.remove(fid); concurrent modification error.
} else if (lock.isMatch(authID)) {
// LOGGER.info("matches, is authorized: "
// + lock.isAuthorized(transaction));
if (lock.isAuthorized(transaction)) {
unLockedFids.add(fid);
// fidMap.remove(fid);
release = true;
} else {
throw new IOException("Not authorized to release " + lock);
}
}
}
for (Iterator k = unLockedFids.iterator(); k.hasNext(); ) {
fidMap.remove(k.next());
}
}
return release;
}
/**
* Implment lockExists.
*
* <p>Remeber lock may have expired.
*
* @param authID
* @return true if lock exists for authID
* @see org.geotools.data.LockingManager#lockExists(java.lang.String)
*/
public boolean exists(String authID) {
// LOGGER.info("checking existence of lock: " + authID + " in "
// + allLocks());
if (authID == null) {
return false;
}
Lock lock;
for (Iterator i = allLocks().iterator(); i.hasNext(); ) {
lock = (Lock) i.next();
if (lock.isExpired()) {
i.remove();
} else if (lock.isMatch(authID)) {
return true;
}
}
return false;
}
