/// <summary>
/// Initializes a new instance of the <see cref="CompositeSecretProvider"/> class.
/// </summary>
/// <param name="secretProviderSources">The sequence of all available registered secret provider registrations.</param>
/// <param name="criticalExceptionFilters">The sequence of all available registered critical exception filters.</param>
/// <param name="auditingOptions">The customized options to configure the auditing of the secret store.</param>
/// <exception cref="ArgumentNullException">Thrown when the <paramref name="secretProviderSources"/> or <paramref name="criticalExceptionFilters"/> or <paramref name="auditingOptions"/> is <c>null</c>.</exception>
/// <exception cref="ArgumentException">Thrown when the <paramref name="secretProviderSources"/> of the <paramref name="criticalExceptionFilters"/> contains any <c>null</c> values.</exception>
public CompositeSecretProvider(
IEnumerable <SecretStoreSource> secretProviderSources,
IEnumerable <CriticalExceptionFilter> criticalExceptionFilters,
SecretStoreAuditingOptions auditingOptions)
: this(secretProviderSources, criticalExceptionFilters, auditingOptions, NullLogger <CompositeSecretProvider> .Instance)
{
}
/// <summary>
/// Initializes a new instance of the <see cref="CompositeSecretProvider"/> class.
/// </summary>
/// <param name="secretProviderSources">The sequence of all available registered secret provider registrations.</param>
/// <param name="criticalExceptionFilters">The sequence of all available registered critical exception filters.</param>
/// <param name="auditingOptions">The customized options to configure the auditing of the secret store.</param>
/// <param name="logger">The logger instance to write diagnostic messages during the retrieval of secrets via the registered <paramref name="secretProviderSources"/>.</param>
/// <exception cref="ArgumentNullException">Thrown when the <paramref name="secretProviderSources"/> or <paramref name="criticalExceptionFilters"/> or <paramref name="auditingOptions"/> is <c>null</c>.</exception>
/// <exception cref="ArgumentException">Thrown when the <paramref name="secretProviderSources"/> of the <paramref name="criticalExceptionFilters"/> contains any <c>null</c> values.</exception>
public CompositeSecretProvider(
IEnumerable <SecretStoreSource> secretProviderSources,
IEnumerable <CriticalExceptionFilter> criticalExceptionFilters,
SecretStoreAuditingOptions auditingOptions,
ILogger <CompositeSecretProvider> logger)
{
Guard.NotNull(secretProviderSources, nameof(secretProviderSources), "Requires a series of registered secret provider registrations to retrieve secrets");
Guard.NotNull(criticalExceptionFilters, nameof(criticalExceptionFilters), "Requires a series of registered critical exception filters to determine if a thrown exception is critical");
Guard.NotNull(auditingOptions, nameof(auditingOptions), "Requires a set of options to configure the auditing of the secret store");
Guard.For <ArgumentException>(() => secretProviderSources.Any(source => source is null), "Requires all registered secret provider registrations to be not 'null'");
Guard.For <ArgumentException>(() => criticalExceptionFilters.Any(filter => filter is null), "Requires all registered critical exception filters to be not 'null'");
_secretProviders = secretProviderSources;
_criticalExceptionFilters = criticalExceptionFilters;
_auditingOptions = auditingOptions;
_logger = logger ?? NullLogger <CompositeSecretProvider> .Instance;
}
private static IDictionary <string, Lazy <ISecretProvider> > CreateGroupedSecretProviders(
IEnumerable <SecretStoreSource> secretProviders,
IEnumerable <CriticalExceptionFilter> criticalExceptionFilters,
SecretStoreAuditingOptions auditingOptions,
ILogger <CompositeSecretProvider> logger)
{
return(secretProviders
.Where(source => source.Options.Name != null)
.GroupBy(source => source.Options.Name)
.ToDictionary(group => group.Key, group =>
{
return new Lazy <ISecretProvider>(() =>
{
if (group.Count() == 1)
{
SecretStoreSource source = group.First();
return source.CachedSecretProvider ?? source.SecretProvider;
}
return new CompositeSecretProvider(group, criticalExceptionFilters, auditingOptions, logger);
});
}));
}