static ObjectInfo RetrieveInfo(StateServerKey key)
{
// Tells the server that operations performed with this key shouldn't reset timeouts:
var mgtKey = key;
mgtKey.IsManagementKey = true;
// ScaleOut 5.5 (and higher) fixes key structs to be immutable. Use this line instead:
//var mgtKey = key.ToManagementKey();
// Retrieve metadata info from the SOSS service:
DataAccessor da = DataAccessor.CreateDataAccessor(mgtKey, lockWhenReading: false);
ReadMetadataResult res = da.ReadMetadata(ReadOptions.ObjectMayBeLocked | ReadOptions.ObjectMayNotExist);
if (res.Status == StateServerResult.ObjectNotFound)
{
// Object was removed/expired between the time of initial key retrieval and metadata retrieval.
return(null);
}
ExtendedObjectMetadata meta = res.Metadata;
ObjectInfo objInfo = new ObjectInfo()
{
Key = key,
SizeInBytes = meta.ObjectSize
};
// TODO: If we need to capture a custom property/field on the object itself, add a reference
// to its assembly (so it can be deserialized) and then retrieve the object here. Once we have
// an instance of it, any properties we're interested in can be added on as a new property of
// the ObjectInfo we're returning.
// For example:
/*
* try
* {
* MyClass myObject = (MyClass)da.ReadObject(false);
* if (myObject != null)
* {
* ret.InterestingProperty = myObject.InterestingProperty;
* }
* }
* catch
* {
* }
*/
return(objInfo);
}