/// <summary>
/// Instantiates the queryable dictionary for reactive processing entity storage, backed by Azure table storage.
/// </summary>
/// <param name="queryProvider">The query provider to the Auzre table storage.</param>
/// <param name="underlyingDictionary">The underlying queryable dictionary for the metadata entities.</param>
public AzureQueryableDictionary(AzureMetadataQueryProvider queryProvider, IQueryableDictionary<Uri, TMetadataInterface> underlyingDictionary)
{
if (underlyingDictionary == null)
throw new ArgumentNullException(nameof(underlyingDictionary));
_queryProvider = queryProvider ?? throw new ArgumentNullException(nameof(queryProvider));
Expression = CastExpression(underlyingDictionary.Expression);
}
/// <summary>
/// Creates a new Azure metadata service provider using the cloud table client provided.
/// </summary>
/// <param name="tableClient">The cloud table client.</param>
/// <param name="storageResolver">The table address and partition key resolver.</param>
public AzureMetadataServiceProvider(ITableClient tableClient, IStorageResolver storageResolver)
{
var defaultClientBackoff = TimeSpan.FromMilliseconds(100);
var maxAttempts = 3;
var requestOptions = new TableRequestOptions
{
RetryPolicy = new ExponentialRetry(defaultClientBackoff, maxAttempts)
};
Provider = new AzureMetadataQueryProvider(tableClient, storageResolver, requestOptions);
}
/// <summary>
/// Creates a new reactive metadata service proxy using the specified service provider and expression tree normalization services.
/// </summary>
/// <param name="serviceProvider">Metadata service provider exposing the underlying query provider for use by IRP facilities.</param>
/// <param name="expressionServices">Expression tree normalization services.</param>
private AzureReactiveMetadataProxy(AzureMetadataServiceProvider serviceProvider, ReactiveExpressionServices expressionServices)
: base(serviceProvider, expressionServices)
{
_queryProvider = (AzureMetadataQueryProvider)serviceProvider.Provider;
}
/// <summary>
/// Creates a new metadata query using the specified provider and expression tree representation.
/// </summary>
/// <param name="provider">Metadata query provider used to compose queries and to execute the query against Azure table storage.</param>
/// <param name="expression">Expression representing the metadata query.</param>
public MetadataQuery(AzureMetadataQueryProvider provider, Expression expression)
{
_provider = provider;
Expression = expression;
}