internal bool SetInternal(string key, TableCacheEntry entry)
{
TableOperation op = TableOperation.InsertOrReplace(entry);
TableResult result = table.Execute(op);
return(result.HttpStatusCode == 200 || result.HttpStatusCode == 204); // Success or "No content"
}
public bool Set <T>(string key, T value)
{
string sVal = Serialize <T>(value);
TableCacheEntry entry = CreateTableEntry(key, sVal);
return(SetInternal(key, entry));
}
public bool AddInternal(string key, TableCacheEntry entry)
{
TableOperation op = TableOperation.Insert(entry);
TableResult result = table.Execute(op);
return(result.HttpStatusCode == 200);
}
public async Task <bool> AddInternalAsync(string key, TableCacheEntry entry, CancellationToken token = default)
{
var op = TableOperation.Insert(entry);
var result = await table.ExecuteAsync(op, token);
return(result.HttpStatusCode == 200);
}
public bool Add <T>(string key, T value, DateTime expiresAt)
{
string sVal = serializer.SerializeToString <T>(value);
TableCacheEntry entry = CreateTableEntry(key, sVal, null, expiresAt);
return(AddInternal(key, entry));
}
public bool Set <T>(string key, T value, DateTime expiresAt)
{
string sVal = Serialize <T>(value);
TableCacheEntry entry = CreateTableEntry(key, sVal, null, expiresAt);
return(SetInternal(key, entry));
}
public T Get <T>(string key)
{
TableCacheEntry entry = GetEntry(key);
if (entry != null)
{
return(Deserialize <T>(entry.Data));
}
return(default(T));
}
internal bool ReplaceInternal(string key, string value, DateTime?expiresAt = null)
{
TableCacheEntry entry = null;
if (TryGetValue(key, out entry))
{
entry = CreateTableEntry(key, value, null, expiresAt);
TableOperation op = TableOperation.Replace(entry);
TableResult result = table.Execute(op);
return(result.HttpStatusCode == 200);
}
return(false);
}
public TimeSpan?GetTimeToLive(string key)
{
TableCacheEntry entry = GetEntry(key);
if (entry != null)
{
if (entry.ExpiryDate == null)
{
return(TimeSpan.MaxValue);
}
return(entry.ExpiryDate - DateTime.UtcNow);
}
return(null);
}
internal TableCacheEntry GetEntry(string key)
{
TableCacheEntry entry = null;
if (TryGetValue(key, out entry))
{
if (entry.HasExpired)
{
this.Remove(key);
return(null);
}
return(entry);
}
return(null);
}
private bool TryGetValue(string key, out TableCacheEntry entry)
{
entry = null;
var op = TableOperation.Retrieve <TableCacheEntry>(partitionKey, key);
var retrievedResult = table.Execute(op);
if (retrievedResult.Result != null)
{
entry = retrievedResult.Result as TableCacheEntry;
return(true);
}
return(false);
}
public bool Remove(string key)
{
TableCacheEntry entry = CreateTableEntry(key);
entry.ETag = "*"; // Avoids concurrency
TableOperation op = TableOperation.Delete(entry);
try
{
TableResult result = table.Execute(op);
return(result.HttpStatusCode == 200 || result.HttpStatusCode == 204);
}
catch (Microsoft.WindowsAzure.Storage.StorageException ex)
{
if (ex.RequestInformation.HttpStatusCode == (int)System.Net.HttpStatusCode.NotFound)
{
return(false);
}
throw ex;
}
}
