/// <summary>
/// Get store from container identifier
/// </summary>
/// <param name="containerIdentifier">Container identifier</param>
/// <returns>CB store</returns>
public async Task <CBStore> GetStore(ContainerIdentifier containerIdentifier)
{
ContainerDescriptor containerDescriptor = ContainerDescriptorProvider.Containers[containerIdentifier];
string azureStorageConnectionString = await this.connectionStringProvider.GetBlobsAzureStorageConnectionString(containerDescriptor.AzureStorageInstanceType);
string azureCdnUrl = await this.connectionStringProvider.GetAzureCdnUrl(containerDescriptor.AzureCdnInstanceType);
string uniqueStoreIdentity = string.Join(":", azureStorageConnectionString, azureCdnUrl);
// cachedStoreObjects is a thread-safe dictionary (ConcurrentDictionary). If uniqueStoreIdentity is not present
// in cachedStoreObjects, try adding it. Since GetStore can be called concurrently by
// different threads, it is possible for two (or more) threads to attempt inserting uniqueStoreIdentity
// concurrently in the cachedStoreObjects. That's ok, because the call to TryAdd is guaranteed to be thread-safe.
// One of the threads will not be able to insert (i.e., TryAdd will return false), but the code will happily execute
// and fall through to the return statement.
// This code makes no use of locking on the common path (i.e., reads of cachedStoreObjects).
if (!cachedStoreObjects.ContainsKey(uniqueStoreIdentity))
{
AzureBlobStorage azureBlobStorage = new AzureBlobStorage(azureStorageConnectionString);
azureBlobStorage.BlobRequestOptions = AzureStorageConfiguration.GetBlobRequestOptions();
AzureCdn azureCdn = new AzureCdn(azureCdnUrl);
CBStore store = new CBStore(azureBlobStorage, azureCdn);
cachedStoreObjects.TryAdd(uniqueStoreIdentity, store);
}
return(cachedStoreObjects[uniqueStoreIdentity]);
}
/// <summary>
/// Initialize queue descriptors
/// </summary>
private static void Initalize()
{
ContainerDescriptor blobsContainer = new ContainerDescriptor()
{
ContainerName = ContainerIdentifier.Blobs.ToString().ToLower(),
AzureStorageInstanceType = AzureStorageInstanceType.Default,
AzureCdnInstanceType = AzureCdnInstanceType.Default
};
ContainerDescriptor imagesContainer = new ContainerDescriptor()
{
ContainerName = ContainerIdentifier.Images.ToString().ToLower(),
AzureStorageInstanceType = AzureStorageInstanceType.Default,
AzureCdnInstanceType = AzureCdnInstanceType.Default
};
Add(ContainerIdentifier.Blobs, blobsContainer);
Add(ContainerIdentifier.Images, imagesContainer);
}
/// <summary>
/// Add container descriptor for container identifier
/// </summary>
/// <param name="containerIdentifier">Container identifier</param>
/// <param name="containerDescriptor">Container descriptor</param>
private static void Add(ContainerIdentifier containerIdentifier, ContainerDescriptor containerDescriptor)
{
containers.Add(containerIdentifier, containerDescriptor);
}
/// <summary>
/// Get container name for container identifier
/// </summary>
/// <param name="containerIdentifier">Container identifier</param>
/// <returns>Container name</returns>
public string GetContainerName(ContainerIdentifier containerIdentifier)
{
ContainerDescriptor containerDescriptor = ContainerDescriptorProvider.Containers[containerIdentifier];
return(containerDescriptor.ContainerName);
}
