X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=c_sharp%2Fsrc%2Forg%2Fldk%2Fstructs%2FEventsProvider.cs;fp=c_sharp%2Fsrc%2Forg%2Fldk%2Fstructs%2FEventsProvider.cs;h=ff15c350e9139967667be222fb1869d83da8597e;hb=810f7404202e04f70db946ced7363b64ddaf4ce4;hp=0000000000000000000000000000000000000000;hpb=fa130da4108815a8b17c3c093a91fc3d83754a0f;p=ldk-java diff --git a/c_sharp/src/org/ldk/structs/EventsProvider.cs b/c_sharp/src/org/ldk/structs/EventsProvider.cs new file mode 100644 index 00000000..ff15c350 --- /dev/null +++ b/c_sharp/src/org/ldk/structs/EventsProvider.cs @@ -0,0 +1,95 @@ +using org.ldk.impl; +using org.ldk.enums; +using org.ldk.util; +using System; + +namespace org { namespace ldk { namespace structs { + +/** + * A trait indicating an object may generate events. + * + * Events are processed by passing an [`EventHandler`] to [`process_pending_events`]. + * + * Implementations of this trait may also feature an async version of event handling, as shown with + * [`ChannelManager::process_pending_events_async`] and + * [`ChainMonitor::process_pending_events_async`]. + * + * # Requirements + * + * When using this trait, [`process_pending_events`] will call [`handle_event`] for each pending + * event since the last invocation. + * + * In order to ensure no [`Event`]s are lost, implementors of this trait will persist [`Event`]s + * and replay any unhandled events on startup. An [`Event`] is considered handled when + * [`process_pending_events`] returns, thus handlers MUST fully handle [`Event`]s and persist any + * relevant changes to disk *before* returning. + * + * Further, because an application may crash between an [`Event`] being handled and the + * implementor of this trait being re-serialized, [`Event`] handling must be idempotent - in + * effect, [`Event`]s may be replayed. + * + * Note, handlers may call back into the provider and thus deadlocking must be avoided. Be sure to + * consult the provider's documentation on the implication of processing events and how a handler + * may safely use the provider (e.g., see [`ChannelManager::process_pending_events`] and + * [`ChainMonitor::process_pending_events`]). + * + * (C-not implementable) As there is likely no reason for a user to implement this trait on their + * own type(s). + * + * [`process_pending_events`]: Self::process_pending_events + * [`handle_event`]: EventHandler::handle_event + * [`ChannelManager::process_pending_events`]: crate::ln::channelmanager::ChannelManager#method.process_pending_events + * [`ChainMonitor::process_pending_events`]: crate::chain::chainmonitor::ChainMonitor#method.process_pending_events + * [`ChannelManager::process_pending_events_async`]: crate::ln::channelmanager::ChannelManager::process_pending_events_async + * [`ChainMonitor::process_pending_events_async`]: crate::chain::chainmonitor::ChainMonitor::process_pending_events_async + */ +public class EventsProvider : CommonBase { + internal readonly bindings.LDKEventsProvider bindings_instance; + internal EventsProvider(object _dummy, long ptr) : base(ptr) { bindings_instance = null; } + private EventsProvider(bindings.LDKEventsProvider arg) : base(bindings.LDKEventsProvider_new(arg)) { + this.ptrs_to.AddLast(arg); + this.bindings_instance = arg; + } + ~EventsProvider() { + if (ptr != 0) { bindings.EventsProvider_free(ptr); } + } + + public interface EventsProviderInterface { + /** + * Processes any events generated since the last call using the given event handler. + * + * See the trait-level documentation for requirements. + */ + void process_pending_events(EventHandler _handler); + } + private class LDKEventsProviderHolder { internal EventsProvider held; } + private class LDKEventsProviderImpl : bindings.LDKEventsProvider { + internal LDKEventsProviderImpl(EventsProviderInterface arg, LDKEventsProviderHolder impl_holder) { this.arg = arg; this.impl_holder = impl_holder; } + private EventsProviderInterface arg; + private LDKEventsProviderHolder impl_holder; + public void process_pending_events(long _handler) { + EventHandler ret_hu_conv = new EventHandler(null, _handler); + if (ret_hu_conv != null) { ret_hu_conv.ptrs_to.AddLast(this); }; + arg.process_pending_events(ret_hu_conv); + GC.KeepAlive(arg); + } + } + public static EventsProvider new_impl(EventsProviderInterface arg) { + LDKEventsProviderHolder impl_holder = new LDKEventsProviderHolder(); + impl_holder.held = new EventsProvider(new LDKEventsProviderImpl(arg, impl_holder)); + return impl_holder.held; + } + /** + * Processes any events generated since the last call using the given event handler. + * + * See the trait-level documentation for requirements. + */ + public void process_pending_events(org.ldk.structs.EventHandler handler) { + bindings.EventsProvider_process_pending_events(this.ptr, handler == null ? 0 : handler.ptr); + GC.KeepAlive(this); + GC.KeepAlive(handler); + if (this != null) { this.ptrs_to.AddLast(handler); }; + } + +} +} } }