ContentLoader

class kanzi::connect::ContentLoader

Abstract class that retrieves content from external location.

Subclassed by DefaultContentLoader

Public Functions

ContentLoader()

Constructor.

virtual ~ContentLoader() = default

dtor

void addObserver(Observer *observer)

Subscribe to content notification callbacks.

Parameters

• observer: Observer to add.

void removeObserver(Observer *observer)

Unsubscribe from content notification callbacks.

Parameters

• observer: Observer to remove.

virtual void start(ContentQueryArgumentsSharedPtr args) = 0

Function to start tracking the external content.

Parameters

• args: arguments for the content query

virtual void startRuntime(const string uri, int credits, int creditReturnInterval) = 0

Starts runtime loading of data from a specific address.

Parameters

• uri: the uri where from to load.

• credits: total amount of transfer credits.

• creditReturnInterval: after how many received packets credits are returned to sender.

virtual void stop() = 0

Function to stop / cancel the tracking process.

class Observer

Class that contains callbacks to deliver the results.

Subclassed by ContentAdapter, DebugContentObserver, RuntimeDataSubscriber

Public Functions

virtual void onContentInvalidated(ContentLoader *loader) = 0

Callback to notify that previously loaded content is no longer valid.

Parameters

• loader: Content loader that invalidated the content.

virtual void onContentLoaded(ContentLoader *loader, ContentResult *result) = 0

Callback to notify that new content has been loaded.

Parameters

• loader: Content loader that finished loading.

• result: Result of content query.

virtual void onRuntimeDataUpdateReceived(ContentLoader *loader, const string &uri, const string &stream) = 0

Callback to notify when runtime data update is received.