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author | Christian Grothoff <christian@grothoff.org> | 2021-08-13 22:35:13 +0200 |
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committer | Christian Grothoff <christian@grothoff.org> | 2021-08-13 22:35:13 +0200 |
commit | 41aa1ed41d0779be263f5f0ef21a999a6f9154c0 (patch) | |
tree | eda484ab6d1adfed23aa088b709e9c76556583c4 /src/include/taler_exchangedb_plugin.h | |
parent | 756998a6d57dcb1ef310be326b22379caf3030d0 (diff) | |
download | exchange-41aa1ed41d0779be263f5f0ef21a999a6f9154c0.tar.xz |
-add support for event notifications to exchangedb plugin
Diffstat (limited to 'src/include/taler_exchangedb_plugin.h')
-rw-r--r-- | src/include/taler_exchangedb_plugin.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/src/include/taler_exchangedb_plugin.h b/src/include/taler_exchangedb_plugin.h index 1eab06fc8..61c764a53 100644 --- a/src/include/taler_exchangedb_plugin.h +++ b/src/include/taler_exchangedb_plugin.h @@ -2146,6 +2146,52 @@ struct TALER_EXCHANGEDB_Plugin /** + * Register callback to be invoked on events of type @a es. + * + * @param cls database context to use + * @param session connection to use + * @param es specification of the event to listen for + * @param cb function to call when the event happens, possibly + * multiple times (until cancel is invoked) + * @param cb_cls closure for @a cb + * @return handle useful to cancel the listener + */ + struct GNUNET_DB_EventHandler * + (*event_listen)(void *cls, + struct TALER_EXCHANGEDB_Session *session, + const struct GNUNET_DB_EventHeaderP *es, + GNUNET_DB_EventCallback cb, + void *cb_cls); + + /** + * Stop notifications. + * + * @param cls database context to use + * @param eh handle to unregister. + */ + void + (*event_listen_cancel)(void *cls, + struct GNUNET_DB_EventHandler *eh); + + + /** + * Notify all that listen on @a es of an event. + * + * @param cls database context to use + * @param session connection to use + * @param es specification of the event to generate + * @param extra additional event data provided + * @param extra_size number of bytes in @a extra + */ + void + (*event_notify)(void *cls, + struct TALER_EXCHANGEDB_Session *session, + const struct GNUNET_DB_EventHeaderP *es, + const void *extra, + size_t extra_size); + + + /** * Insert information about a denomination key and in particular * the properties (value, fees, expiration times) the coins signed * with this key have. |