public long TryAppend(byte[] buffer, TapeAppendCondition appendCondition = new TapeAppendCondition())
{
if (buffer == null)
throw new ArgumentNullException("buffer");
if (buffer.Length == 0)
throw new ArgumentException("Buffer must contain at least one byte.");
try
{
var result = _dictionary.AddOrUpdate(_name, s =>
{
appendCondition.Enforce(0);
var records = new List<TapeRecord>();
records.Add(new TapeRecord(1, buffer));
return records;
}, (s, list) =>
{
appendCondition.Enforce(list.Count);
return list.Concat(new[] {new TapeRecord(list.Count + 1, buffer)}).ToList();
});
return result.Count;
}
catch (TapeAppendConditionException e)
{
return 0;
}
}
