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Inventory events

This topic describes the events that are used when inventory information is updated in Commerce. The events are handled through the CatalogKeyEventBroadcaster class. 

Listening to events

To listen to new events, register your method to the event of the CatalogKeyEventBroadcaster class:

public event EventHandler<InventoryUpdateEventArgs> InventoryUpdateEvent;

To listen to remote events, first get the event from Events engine.

    public void AddEvent()
    {
        Event ev = Event.Get(CatalogKeyEventBroadcaster.CatalogKeyEventGuid);
        ev.Raised += CatalogKeyEventUpdated;
    }

    private void CatalogKeyEventUpdated(object sender, EventNotificationEventArgs e)
    {
        var eventArgs = (CatalogKeyEventArgs)DeSerialize((byte[])e.Param);
        var inventoryUpdatedEventArgs = eventArgs as InventoryUpdateEventArgs;
        if (inventoryUpdatedEventArgs != null)
        {
            RemoteInventoryUpdated(sender, inventoryUpdatedEventArgs);
        }
    }

    private void RemoteInventoryUpdated(object sender, InventoryUpdateEventArgs inventoryUpdatedEventArgs)
    {
        //Your action when inventories are updated remotely.
    }

    protected virtual CatalogKeyEventArgs DeSerialize(byte[] buffer)
    {
         var formatter = new BinaryFormatter();
         var stream = new MemoryStream(buffer);
         return formatter.Deserialize(stream) as CatalogKeyEventArgs;
    }

Ensure that you call your AddEvent in an IInitializationModule.

Triggering events

When inventories are saved through the default implementation, the event is automatically triggered. In a custom implementation of the interface, the event must be triggered for the system to know when there are changes in inventories.

To broadcast the events, use the CatalogKeyEventBroadcaster class. This class has one public method for triggering inventory events:

public virtual void InventoryUpdated(object source, InventoryUpdateEventArgs args)

Whenever changes are done to the inventory system, you can call the method to raise an event.

To trigger an event in your inventory system implementation, add the following code to your void Save(IEnumerable<InventoryRecord> records); method:

_broadcaster.InventoryUpdated(this, new InventoryUpdateEventArgs(catalogKeys.ToList()));

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