Name 

Description 

 

GetAllowedBufferSize 

Called by Lightstreamer Kernel through the Remote Server to ask for the maximum allowed size of the buffer internally used to enqueue subsequent ItemUpdates for the same Item. In this default implementation, the Metadata Adapter poses no restriction.  

 

GetAllowedMaxBandwidth 

Called by Lightstreamer Kernel through the Remote Server to ask for the bandwidth amount to be allowed to a User for a push Session. In this default implementation, the Metadata Adapter poses no restriction.  

 

GetAllowedMaxItemFrequency 

Called by Lightstreamer Kernel through the Remote Server to ask for the ItemUpdate frequency to be allowed to a User for a specific Item. In this default implementation, the Metadata Adapter poses no restriction; this also enables unfiltered dispatching for Items subscribed in MERGE or DISTINCT mode.  

 

GetDistinctSnapshotLength 

Called by Lightstreamer Kernel through the Remote Server to ask for the maximum allowed length for a Snapshot of an Item that has been requested with publishing Mode DISTINCT. In this default implementation, 0 events are specified, so snapshot will not be managed.  

 

GetItems 

Called by Lightstreamer Kernel through the Remote Server to resolve a Group name supplied in a Request. The names of the Items in the Group must be returned. For instance, the client could be allowed to specify the "NASDAQ100" Group name and, upon that, the list of all items corresponding to the stocks included in that index could be returned.
Possibly, the content of a Group may be dependant on the User who is issuing the Request or on the specific Session instance.
A special case is when the Group name is made of a space-separated list of the names... more 

 

GetMinSourceFrequency 

Called by Lightstreamer Kernel through the Remote Server to ask for the minimum ItemEvent frequency from the Data Adapter at which the events for an Item are guaranteed to be delivered to the Clients without loss of information. In this default implementation, the Metadata Adapter can't set any minimum frequency; this also enables unfiltered dispatching for Items subscribed in MERGE or DISTINCT mode.  

 

GetSchema 

Called by Lightstreamer Kernel through the Remote Server to resolve a Schema name supplied in a Request. The names of the Fields in the Schema must be returned.
Possibly, the content of a Schema may be dependant on the User who is issuing the Request, on the specific Session instance or on the Group to which the Request is related.
A special case is when the Schema name is made of a space-separated list of the names of the fields in the Schema. This convention is used by some of the subscription methods provided by the various client libraries. The... more 

 

Init 

No-op initialization.  

 

IsModeAllowed 

Called by Lightstreamer Kernel through the Remote Server to ask for the allowance of a publishing Mode for an Item. A publishing Mode can or cannot be allowed depending on the User. In this default implementation, the Metadata Adapter poses no restriction. As a consequence, conflicting Modes may be both allowed for the same Item, so the Clients should ensure that the same Item cannot be requested in two conflicting Modes.  

 

ModeMayBeAllowed 

Called by Lightstreamer Kernel through the Remote Server to ask for the allowance of a publishing Mode for an Item (for at least one User). In this default implementation, the Metadata Adapter poses no restriction. As a consequence, conflicting Modes may be both allowed for the same Item, so the Clients should ensure that the same Item cannot be requested in two conflicting Modes.  

 

NotifyNewSession 

Called by Lightstreamer Kernel through the Remote Server to check that a User is enabled to open a new push Session. In this default implementation, the Metadata Adapter poses no restriction.  

 

NotifyNewTables 

Called by Lightstreamer Kernel through the Remote Server to check that a User is enabled to add some Tables (i.e. Subscriptions) to a push Session. In this default implementation, the Metadata Adapter poses no restriction. Unless the WantsTablesNotification method is overridden, this method will never be called by Lightstreamer Kernel.  

 

NotifySessionClose 

Called by Lightstreamer Kernel through the Remote Server to notify the Metadata Adapter that a push Session has been closed. In this default implementation, the Metadata Adapter does nothing, because it doesn't need to remember the open Sessions.  

 

NotifyTablesClose 

Called by Lightstreamer Kernel through the Remote Server to notify the Metadata Adapter that some Tables (i.e. Subscriptions) have been removed from a push Session. In this default implementation, the Metadata Adapter does nothing, because it doesn't need to remember the Tables used. Unless the WantsTablesNotification method is overridden, this method will never be called by Lightstreamer Kernel.  

 

NotifyUser 

This is the overview for the NotifyUser method overload. 

 

NotifyUser 

This is the overview for the NotifyUser method overload. 

 

NotifyUserMessage 

Called by Lightstreamer Kernel through the Remote Server to forward a message received by a User. In this default implementation, the Metadata Adapter does never accept the message.  

 

WantsTablesNotification 

Called by Lightstreamer Kernel through the Remote Server to know whether the Metadata Adapter must or must not be notified any time a Table (i.e. Subscription) is added or removed from a push Session owned by a supplied User. In this default implementation, the Metadata Adapter doesn't require such notifications.