public IObservable <Unit> InsertObject <T>(string key, T value, DateTimeOffset?absoluteExpiration = null)
{
if (disposed)
{
return(Observable.Throw <Unit>(new ObjectDisposedException("SqlitePersistentBlobCache")));
}
var data = SerializeObject(value);
lock (_inflightCache) _inflightCache.Invalidate(key);
var element = new CacheElement()
{
Expiration = absoluteExpiration != null ? absoluteExpiration.Value.UtcDateTime : DateTime.MaxValue,
Key = key,
TypeName = typeof(T).FullName
};
var ret = BeforeWriteToDiskFilter(data, Scheduler)
.Do(x => element.Value = x)
.SelectMany(x => _connection.InsertAsync(element, "OR REPLACE", typeof(CacheElement)).Select(_ => Unit.Default))
.Multicast(new AsyncSubject <Unit>());
ret.Connect();
return(ret);
}
public Func <IEnumerable <CacheElement> > PrepareToExecute(IEnumerable <string> toSelect)
{
var selectList = toSelect.ToList();
if (selectList.Count == 0)
{
return(() => new List <CacheElement>());
}
var selectOp = selectOps[selectList.Count - 1];
var now = sched.Now;
return(() =>
{
var result = new List <CacheElement>();
try
{
for (int i = 0; i < selectList.Count; i++)
{
this.Checked(raw.sqlite3_bind_text(selectOp, i + 1, selectList[i]));
}
while (this.Checked(raw.sqlite3_step(selectOp)) == SQLite3.Result.Row)
{
var ce = new CacheElement()
{
Key = raw.sqlite3_column_text(selectOp, 0),
TypeName = raw.sqlite3_column_text(selectOp, 1),
Value = raw.sqlite3_column_blob(selectOp, 2),
Expiration = new DateTime(raw.sqlite3_column_int64(selectOp, 3)),
CreatedAt = new DateTime(raw.sqlite3_column_int64(selectOp, 4)),
};
if (now.UtcTicks <= ce.Expiration.Ticks)
{
result.Add(ce);
}
}
}
finally
{
this.Checked(raw.sqlite3_reset(selectOp));
}
return result;
});
}