Assembly: soss_namedcache (in soss_namedcache.dll) Version: 22.214.171.124
public ExtendedObjectMetadata GetMetadata( CachedObjectId id, bool acquireLock )
Public Function GetMetadata ( id As CachedObjectId, acquireLock As Boolean ) As ExtendedObjectMetadata
- Type: Soss.ClientCachedObjectId
- Type: SystemBoolean
If true, indicates that the method should attempt to acquire a lock on the object when reading it from the server.
Return ValueType: ExtendedObjectMetadata
If the object identified by id is found in the cache, the object's ExtendedObjectMetadata is returned. If the object is not found in the cache, null is returned.
|ObjectLockedException||Thrown if acquireLock is true but the object is locked by another client.|
|StateServerException||Thrown if ScaleOut StateServer is unavailable or has experienced an internal error.|
|ReadThroughTimeoutException||Thrown if GeoServer pull replication is used on this NamedCache and a remote read of an object is delayed beyond the number of retries specified by MaxReadThroughPendingAttempts.|
This method optionally locks the object in SOSS to prevent other clients from updating or removing the object. The UseLocking property is not taken into consideration by this method. If the acquireLock parameter is true, this call will block until the lock is acquired or the MaxLockAttempts limit has been met. The lock affects the entire object, not just its metadata, and can be released through a call to ReleaseLock(CachedObjectId), Update(CachedObjectId, Object, Boolean), Remove(CachedObjectId), or SetMetadata(CachedObjectId, ObjectMetadata, Boolean). If no subsequent call is made, the lock will automatically expire after approximately 90 seconds. Passing true to an object that is already locked by the same instance of the NamedCache will refresh the lock by resetting the 90 second lock timeout.
If GeoServer pull replication is being used, the NamedCache's DefaultGeoServerReadMode property will determine this GetMetadata overload's GeoServer read behavior when accessing an object's metadata in a remote store. Also, note that doing a locking retrieval of an object's metadata will cause GeoServer pull replication to move the master copy of the associated object into the local store.