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<h1><a name="kanchor79"></a>Callbacks</h1>
<p>Callbacks, also known as events, allow you to be notified on certain database operations. This is useful to trigger additional operations during a database operation. There are two kind of callbacks. First you can certain methods to your objects. When the method matches certain signature it will be called by db4o. <a href="callbacks/object_callbacks.htm" target="" title="" alt="" class="MCXref" xrefformat="See "{paratext}"">See "Object Callbacks"</a></p>
<p>Additionally you can register event listener to a object-container which will be called on certain operations. <a href="callbacks/event_registry_api.htm" target="" title="" alt="" class="MCXref" xrefformat="See "{paratext}"">See "Event Registry API"</a></p>
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