internal CosmosClientStreamWrapper(
IResourcePermissionResponse resourcePermissionResponse,
PermissionModeKind permissionMode)
{
var currentPermission = resourcePermissionResponse?.ResourcePermissions?
.FirstOrDefault(p => p?.PermissionMode == permissionMode);
_partitionKey = new PartitionKey(currentPermission?.PartitionKey);
_partitionKeyStr = currentPermission?.PartitionKey;
_partitionKeyHeader = resourcePermissionResponse?.PartitionKeyHeader;
try
{
_cosmosClient = new CosmosClient(resourcePermissionResponse?.EndpointUrl, currentPermission?.ResourceToken);
_container = _cosmosClient
.GetDatabase(resourcePermissionResponse?.DatabaseId)
.GetContainer(resourcePermissionResponse?.CollectionId);
}
catch (Exception ex)
{
Debug.WriteLine($"Unable to instantiate {nameof(CosmosClientStreamWrapper)}. Unhandled exception {ex}");
throw new CosmosClientException($"Unable to instantiate {nameof(CosmosClientStreamWrapper)}. Unhandled exception {ex}", ex);
}
}
// local function evaluating the validity of the object stored in the cache.
static Task <bool> IsCachedObjectValidFunc(IResourcePermissionResponse cachedPermissionObj)
{
if (cachedPermissionObj is null)
{
return(Task.FromResult(false));
}
// Get the Permission that is closed to expire.
var expires = cachedPermissionObj.ResourcePermissions?.OrderBy(resourcePermission => resourcePermission.ExpiresUtc)
.FirstOrDefault()
?.ExpiresUtc ?? default;
// Set expiration permission five minutes before actual expiration to be on safe side.
return(Task.FromResult(DateTime.UtcNow <= expires - TimeSpan.FromMinutes(5)));
}
