GigaSpaces XAP.NET Documentation
ReadIfExists<(Of <(<'T>)>)> Method (query, tx)
Class LibraryGigaSpaces.CoreIReadOnlySpaceProxyReadIfExists<(Of <<'(T>)>>)(IQuery<(Of <<'(T>)>>), ITransaction)
Read any matching object from the space, returning null if there currently is none. Equivalent to read, except that blocking is done only if necessary to wait for transactional state to settle.
Declaration Syntax
C#Visual BasicVisual C++J#
T ReadIfExists<T>(
	IQuery<T> query,
	ITransaction tx
Function ReadIfExists(Of T) ( _
	query As IQuery(Of T), _
	tx As ITransaction _
) As T
generic<typename T>
T ReadIfExists(
	IQuery<T>^ query, 
	ITransaction^ tx
J# supports the use of generic APIs, but not the declaration of new ones.
Generic Template Parameters
Type of object to read.
query (IQuery<(Of <(<'T>)>)>)
The query used for matching.
tx (ITransaction)
The transaction (if any) under which to work.
Return Value
A copy of the object read from the space (null if no match was found).
UnusableEntryExceptionA serialized field of the object being read cannot be deserialized.
TransactionExceptionTransaction error occured.
InactiveSpaceExceptionThe space is in backup mode and therefore is not active.
SqlQueryExceptionThe query template is an illegal SqlQuery.

Assembly: GigaSpaces.Core (Module: GigaSpaces.Core) Version: (