/// <summary>
/// Creates a data loader for the specified table.
/// </summary>
/// <param name="table"> The metadata of the table. </param>
/// <returns>
/// The data loader for the table.
/// </returns>
public ITableDataLoader CreateTableDataLoader(TableDescription table)
{
CachingTableDataLoaderKey key =
new CachingTableDataLoaderKey(
new DataLoaderConfigurationKey(this.wrappedDataLoader),
table.Name);
// If the table data cache does not exists, then the data loader configuration
// should be locked
if (latch != null && !this.dataStore.Contains(key))
{
// Wait for the lock, this could take some time
latch.Acquire();
// Check if the data was created since the waiting
if (this.dataStore.Contains(key))
{
latch.Release();
}
}
// It does not matter if the table data cache was created during the waiting,
// maybe there is still tables thats data is not fetched
return(this.dataStore.GetCachedData(key, () => CreateCachedData(table)));
}
public CachingTableDataLoader GetCachedData(
CachingTableDataLoaderKey key,
Func<CachingTableDataLoader> factoryMethod)
{
CachingTableDataLoader result = null;
if (!this.simpleCache.TryGetValue(key, out result))
{
result = factoryMethod.Invoke();
this.simpleCache.Add(key, result);
}
else
{
this.CachedItemReturnCount++;
}
return result;
}
public CachingTableDataLoader GetCachedData(
CachingTableDataLoaderKey key,
Func <CachingTableDataLoader> factoryMethod)
{
CachingTableDataLoader result = null;
if (!this.simpleCache.TryGetValue(key, out result))
{
result = factoryMethod.Invoke();
this.simpleCache.Add(key, result);
}
else
{
this.CachedItemReturnCount++;
}
return(result);
}
public bool Contains(CachingTableDataLoaderKey key)
{
return this.simpleCache.ContainsKey(key);
}
/// <summary>
/// Determines whether the desired table data is added to store.
/// </summary>
/// <param name="key">
/// The key that identifies the table data.
/// </param>
/// <returns>
/// <c>true</c> if the store contains the data, otherwise <c>false</c>.
/// </returns>
public bool Contains(CachingTableDataLoaderKey key)
{
return(CachingTableDataLoaderStore.Contains(key));
}
/// <summary>
/// Returns the stored table data.
/// </summary>
/// <param name="key">
/// The key that identifies the table data.
/// </param>
/// <param name="factoryMethod">
/// The factory method that initilizes the table data if has not been added to the
/// store yet.
/// </param>
/// <returns>
/// The table data.
/// </returns>
public CachingTableDataLoader GetCachedData(
CachingTableDataLoaderKey key,
Func <CachingTableDataLoader> factoryMethod)
{
return(CachingTableDataLoaderStore.GetCachedData(key, factoryMethod));
}
public bool Contains(CachingTableDataLoaderKey key)
{
return(this.simpleCache.ContainsKey(key));
}
/// <summary>
/// Creates a data loader for the specified table.
/// </summary>
/// <param name="table"> The metadata of the table. </param>
/// <returns>
/// The data loader for the table.
/// </returns>
public ITableDataLoader CreateTableDataLoader(TableDescription table)
{
CachingTableDataLoaderKey key =
new CachingTableDataLoaderKey(
new DataLoaderConfigurationKey(this.wrappedDataLoader),
table.Name);
// If the table data cache does not exists, then the data loader configuration
// should be locked
if (latch != null && !this.dataStore.Contains(key))
{
// Wait for the lock, this could take some time
latch.Acquire();
// Check if the data was created since the waiting
if (this.dataStore.Contains(key))
{
latch.Release();
}
}
// It does not matter if the table data cache was created during the waiting,
// maybe there is still tables thats data is not fetched
return this.dataStore.GetCachedData(key, () => CreateCachedData(table));
}
/// <summary>
/// Returns the stored table data.
/// </summary>
/// <param name="key">
/// The key that identifies the table data.
/// </param>
/// <param name="factoryMethod">
/// The factory method that initilizes the table data if has not been added to the
/// store yet.
/// </param>
/// <returns>
/// The table data.
/// </returns>
public CachingTableDataLoader GetCachedData(
CachingTableDataLoaderKey key,
Func<CachingTableDataLoader> factoryMethod)
{
return CachingTableDataLoaderStore.GetCachedData(key, factoryMethod);
}
/// <summary>
/// Determines whether the desired table data is added to store.
/// </summary>
/// <param name="key">
/// The key that identifies the table data.
/// </param>
/// <returns>
/// <c>true</c> if the store contains the data, otherwise <c>false</c>.
/// </returns>
public bool Contains(CachingTableDataLoaderKey key)
{
return CachingTableDataLoaderStore.Contains(key);
}
