/**
* Appends data to the tail (end) of the log.
*
* @param data The object to append to tail of the log.
* @return A timestamp representing the address the data was written to.
* @throws OutOfSpaceException If there is no space remaining on the log.
*/
@Override
public ITimestamp append(Serializable data) throws OutOfSpaceException {
while (true) {
try {
long token = sequencer.getNext();
woas.write(token, data);
return new SimpleTimestamp(token);
} catch (Exception e) {
log.warn("Issue appending to stream, getting new sequence number...", e);
}
}
}
/**
* Reads data from an address in the log.
*
* @param address A timestamp representing the location to read from.
* @return The object at that address.
* @throws UnwrittenException If the address was unwritten.
* @throws TrimmedException If the address has been trimmed.
*/
@Override
public Object read(ITimestamp address)
throws UnwrittenException, TrimmedException, ClassNotFoundException, IOException {
SimpleTimestamp s = (SimpleTimestamp) address;
return woas.readObject(s.address);
}