nn::nex::DataStoreLogicServerClient::ChangeMeta Member Function

Syntax

virtual qBool ChangeMeta(
     ProtocolCallContext * pContext,
     const qVector< DataStoreChangeMetaParam > & params,
     const qBool transactional = true,
     qVector< qResult > * pResults = NULL
);

Parameters

Name Description
in pContext Call information.
in params Detailed information.
in transactional Whether to process only if all will succeed (true), or to process as much as possible. The process is canceled for data for which the process will fail (false).
out pResults Whether successful or not. (Can be omitted.)

Return Values



Value Description
true RMC call initialization succeeded.
false Failure.

Description

Performs a batch-change to metadata in storage.

DataStoreChangeMetaParam can be specified separately. Up to 100 sets of metadata can be batch-processed. The specified number of processing results on the data IDs specified in params are returned to pResult in the same order in which they were specified. Only data that has update permission can be updated. ChangeMeta cannot be used on POST data with a specified data ID.

Set DataStoreChangeMetaCompareParam in DataStoreChangeMetaParam to change the metadata by comparing and swapping. If the set value and the actual value are not the same, no change is made and the CallContext::GetOutcome function returns QERROR(DataStore, ValueNotEqual).

Revision History

2011/04/25
Added that this function can only update data uploaded by the local system.
2011/01/27
Initial version.

CONFIDENTIAL