public IEnumerable <string> GetContaining(string key)
{
key = KeyCharSubstitutor.Convert(key);
foreach (var file in DI.GetFiles("*" + key + "*"))
{
var keyItem = file.Name.Replace(suffix, "");
yield return(Get(keyItem));
}
}
public bool Exists(string key)
{
key = KeyCharSubstitutor.Convert(key);
if (_GetFileInfo(key).Exists)
{
return(true);
}
return(false);
}
public IEnumerable <string> GetKeysStartingWith(string key)
{
key = KeyCharSubstitutor.Convert(key);
foreach (var file in DI.GetFiles(key + "*"))
{
var keyItem = file.Name.Replace(suffix, "");
keyItem = KeyCharSubstitutor.ConvertBack(keyItem);
yield return(keyItem);
}
}
public void Remove(string key)
{
key = KeyCharSubstitutor.Convert(key);
var fi = _GetFileInfo(key);
if (fi.Exists)
{
fi.Delete();
}
}
public void Set(string key, string value)
{
key = KeyCharSubstitutor.Convert(key);
var fi = _GetFileInfo(key);
if (fi.Exists)
{
fi.Delete();
}
using (var fs = fi.CreateText())
{
fs.Write(value);
}
}
public string Get(string key)
{
key = KeyCharSubstitutor.Convert(key);
var fi = _GetFileInfo(key);
if (!fi.Exists)
{
return(null);
}
using (var sr = fi.OpenText())
{
return(sr.ReadToEnd());
}
}
public void Set(string key, string value, ulong cas)
{
key = KeyCharSubstitutor.Convert(key);
var fi = _GetFileInfo(casPrefix + key, true);
var fiLock = _GetFileInfo(lockPrefix + key, true);
if (!fi.Exists)
{
fi.Create().Dispose();
}
using (var swLock = fiLock.Create())
{
ulong readCasVal = 0;
//get current cas
byte[] bytes = null;
using (var srCAS = fi.OpenRead())
{
bytes = new byte[srCAS.Length];
srCAS.Read(bytes, 0, (int)srCAS.Length);
}
using (var swCAS = fi.OpenWrite())
{
swCAS.Seek(0, SeekOrigin.Begin);
if (bytes.Count() > 0)
{
readCasVal = BitConverter.ToUInt64(bytes, 0);
}
if (readCasVal != cas)
{
throw new CASException("CAS expired");
}
//do our actual set operation
Set(key, value);
var bytesToWrite = BitConverter.GetBytes(cas + 1);
swCAS.Write(bytesToWrite, 0, bytesToWrite.Count());
swCAS.Flush();
}
}
fiLock.Delete();
}
public void Append(string key, string value)
{
key = KeyCharSubstitutor.Convert(key);
var fi = _GetFileInfo(key);
if (!fi.Exists)
{
fi.Create().Dispose();
}
using (var fs = fi.OpenWrite())
{
fs.Seek(fs.Length, SeekOrigin.Begin);
byte[] bytes = Encoding.UTF8.GetBytes(value);
fs.Write(bytes, 0, bytes.Length);
}
}
public string Get(string key, out ulong cas)
{
key = KeyCharSubstitutor.Convert(key);
var fi = _GetFileInfo(casPrefix + key, true);
if (fi.Exists)
{
using (var sr = fi.OpenRead())
{
byte[] bytes = new byte[sr.Length];
sr.Read(bytes, 0, (int)sr.Length);
if (bytes.Length > 0)
{
try
{
cas = BitConverter.ToUInt64(bytes, 0);
}
catch (Exception ex)
{
throw new Exception("Data for key " + casPrefix + key + " is not CAS data", ex);
}
}
else
{
cas = 0;
}
}
}
else
{
cas = 0;
}
return(this.Get(key));
}
public ulong GetNextSequenceValue(string key, int increment)
{
key = KeyCharSubstitutor.Convert(key);
return(IStoreProviderInternalHelpers.GetNextSequenceValueViaCAS(this, key, increment));
}
public int CountContaining(string key)
{
key = KeyCharSubstitutor.Convert(key);
return(DI.GetFiles("*" + key + "*").Count());
}
public int CountStartingWith(string key)
{
key = KeyCharSubstitutor.Convert(key);
return(DI.GetFiles(key + "*").Count());
}
