/** * Called when a delivery is writable */ void OutgoingFromRelay::handle(pn_delivery_t* delivery) { void* context = pn_delivery_get_context(delivery); BufferedTransfer* transfer = reinterpret_cast<BufferedTransfer*>(context); assert(transfer); if (pn_delivery_writable(delivery)) { if (transfer->write(link)) { outgoingMessageSent(); QPID_LOG(debug, "Sent relayed message " << name << " [" << relay.get() << "]"); } else { QPID_LOG(error, "Failed to send relayed message " << name << " [" << relay.get() << "]"); } } if (pn_delivery_updated(delivery)) { uint64_t d = transfer->updated(); switch (d) { case PN_ACCEPTED: outgoingMessageAccepted(); break; case PN_REJECTED: case PN_RELEASED://TODO: not quite true... case PN_MODIFIED://TODO: not quite true... outgoingMessageRejected(); break; default: QPID_LOG(warning, "Unhandled disposition: " << d); } } }
void messaging_adapter::on_delivery(proton_event &pe) { pn_event_t *cevent = pe.pn_event(); pn_link_t *lnk = pn_event_link(cevent); pn_delivery_t *dlv = pn_event_delivery(cevent); link_context& lctx = link_context::get(lnk); if (pn_link_is_receiver(lnk)) { delivery d(make_wrapper<delivery>(dlv)); if (!pn_delivery_partial(dlv) && pn_delivery_readable(dlv)) { // generate on_message pn_connection_t *pnc = pn_session_connection(pn_link_session(lnk)); connection_context& ctx = connection_context::get(pnc); // Reusable per-connection message. // Avoid expensive heap malloc/free overhead. // See PROTON-998 class message &msg(ctx.event_message); msg.decode(d); if (pn_link_state(lnk) & PN_LOCAL_CLOSED) { if (lctx.auto_accept) d.release(); } else { delegate_.on_message(d, msg); if (lctx.auto_accept && !d.settled()) d.accept(); if (lctx.draining && !pn_link_credit(lnk)) { lctx.draining = false; receiver r(make_wrapper<receiver>(lnk)); delegate_.on_receiver_drain_finish(r); } } } else if (pn_delivery_updated(dlv) && d.settled()) { delegate_.on_delivery_settle(d); } if (lctx.draining && pn_link_credit(lnk) == 0) { lctx.draining = false; pn_link_set_drain(lnk, false); receiver r(make_wrapper<receiver>(lnk)); delegate_.on_receiver_drain_finish(r); if (lctx.pending_credit) { pn_link_flow(lnk, lctx.pending_credit); lctx.pending_credit = 0; } } credit_topup(lnk); } else { tracker t(make_wrapper<tracker>(dlv)); // sender if (pn_delivery_updated(dlv)) { uint64_t rstate = pn_delivery_remote_state(dlv); if (rstate == PN_ACCEPTED) { delegate_.on_tracker_accept(t); } else if (rstate == PN_REJECTED) { delegate_.on_tracker_reject(t); } else if (rstate == PN_RELEASED || rstate == PN_MODIFIED) { delegate_.on_tracker_release(t); } if (t.settled()) { delegate_.on_tracker_settle(t); } if (lctx.auto_settle) t.settle(); } } }
int pn_event_handler(void *handler_context, void *conn_context, pn_event_t *event, qd_connection_t *qd_conn) { qd_container_t *container = (qd_container_t*) handler_context; pn_connection_t *conn = qd_connection_pn(qd_conn); pn_session_t *ssn; pn_link_t *pn_link; qd_link_t *qd_link; pn_delivery_t *delivery; switch (pn_event_type(event)) { case PN_CONNECTION_REMOTE_OPEN : qd_connection_set_user(qd_conn); if (pn_connection_state(conn) & PN_LOCAL_UNINIT) { // This Open is an externally initiated connection // Let policy engine decide qd_connection_set_event_stall(qd_conn, true); qd_conn->open_container = (void *)container; qd_connection_invoke_deferred(qd_conn, qd_policy_amqp_open, qd_conn); } else { // This Open is in response to an internally initiated connection notify_opened(container, qd_conn, conn_context); } break; case PN_CONNECTION_REMOTE_CLOSE : if (pn_connection_state(conn) == (PN_LOCAL_ACTIVE | PN_REMOTE_CLOSED)) pn_connection_close(conn); break; case PN_SESSION_REMOTE_OPEN : if (!(pn_connection_state(conn) & PN_LOCAL_CLOSED)) { ssn = pn_event_session(event); if (pn_session_state(ssn) & PN_LOCAL_UNINIT) { if (qd_conn->policy_settings) { if (!qd_policy_approve_amqp_session(ssn, qd_conn)) { break; } qd_conn->n_sessions++; } qd_policy_apply_session_settings(ssn, qd_conn); pn_session_open(ssn); } } break; case PN_SESSION_REMOTE_CLOSE : if (!(pn_connection_state(conn) & PN_LOCAL_CLOSED)) { ssn = pn_event_session(event); if (pn_session_state(ssn) == (PN_LOCAL_ACTIVE | PN_REMOTE_CLOSED)) { // remote has nuked our session. Check for any links that were // left open and forcibly detach them, since no detaches will // arrive on this session. pn_connection_t *conn = pn_session_connection(ssn); pn_link_t *pn_link = pn_link_head(conn, PN_LOCAL_ACTIVE | PN_REMOTE_ACTIVE); while (pn_link) { if (pn_link_session(pn_link) == ssn) { qd_link_t *qd_link = (qd_link_t*) pn_link_get_context(pn_link); if (qd_link && qd_link->node) { if (qd_conn->policy_settings) { if (qd_link->direction == QD_OUTGOING) { qd_conn->n_receivers--; assert(qd_conn->n_receivers >= 0); } else { qd_conn->n_senders--; assert(qd_conn->n_senders >= 0); } } qd_log(container->log_source, QD_LOG_NOTICE, "Aborting link '%s' due to parent session end", pn_link_name(pn_link)); qd_link->node->ntype->link_detach_handler(qd_link->node->context, qd_link, QD_LOST); } } pn_link = pn_link_next(pn_link, PN_LOCAL_ACTIVE | PN_REMOTE_ACTIVE); } if (qd_conn->policy_settings) { qd_conn->n_sessions--; } pn_session_close(ssn); } } break; case PN_LINK_REMOTE_OPEN : if (!(pn_connection_state(conn) & PN_LOCAL_CLOSED)) { pn_link = pn_event_link(event); if (pn_link_state(pn_link) & PN_LOCAL_UNINIT) { if (pn_link_is_sender(pn_link)) { if (qd_conn->policy_settings) { if (!qd_policy_approve_amqp_receiver_link(pn_link, qd_conn)) { break; } qd_conn->n_receivers++; } setup_outgoing_link(container, pn_link); } else { if (qd_conn->policy_settings) { if (!qd_policy_approve_amqp_sender_link(pn_link, qd_conn)) { break; } qd_conn->n_senders++; } setup_incoming_link(container, pn_link); } } else if (pn_link_state(pn_link) & PN_LOCAL_ACTIVE) handle_link_open(container, pn_link); } break; case PN_LINK_REMOTE_CLOSE : case PN_LINK_REMOTE_DETACH : if (!(pn_connection_state(conn) & PN_LOCAL_CLOSED)) { pn_link = pn_event_link(event); qd_link = (qd_link_t*) pn_link_get_context(pn_link); if (qd_link) { qd_node_t *node = qd_link->node; qd_detach_type_t dt = pn_event_type(event) == PN_LINK_REMOTE_CLOSE ? QD_CLOSED : QD_DETACHED; if (node) node->ntype->link_detach_handler(node->context, qd_link, dt); else if (qd_link->pn_link == pn_link) { pn_link_close(pn_link); } if (qd_conn->policy_counted && qd_conn->policy_settings) { if (pn_link_is_sender(pn_link)) { qd_conn->n_receivers--; qd_log(container->log_source, QD_LOG_TRACE, "Closed receiver link %s. n_receivers: %d", pn_link_name(pn_link), qd_conn->n_receivers); assert (qd_conn->n_receivers >= 0); } else { qd_conn->n_senders--; qd_log(container->log_source, QD_LOG_TRACE, "Closed sender link %s. n_senders: %d", pn_link_name(pn_link), qd_conn->n_senders); assert (qd_conn->n_senders >= 0); } } if (qd_link->close_sess_with_link && qd_link->pn_sess && pn_link_state(pn_link) == (PN_LOCAL_CLOSED | PN_REMOTE_CLOSED)) pn_session_close(qd_link->pn_sess); } } break; case PN_LINK_FLOW : pn_link = pn_event_link(event); qd_link = (qd_link_t*) pn_link_get_context(pn_link); if (qd_link && qd_link->node && qd_link->node->ntype->link_flow_handler) qd_link->node->ntype->link_flow_handler(qd_link->node->context, qd_link); break; case PN_DELIVERY : delivery = pn_event_delivery(event); if (pn_delivery_readable(delivery)) do_receive(delivery); if (pn_delivery_updated(delivery)) { do_updated(delivery); pn_delivery_clear(delivery); } break; case PN_EVENT_NONE : case PN_REACTOR_INIT : case PN_REACTOR_QUIESCED : case PN_REACTOR_FINAL : case PN_TIMER_TASK : case PN_CONNECTION_INIT : case PN_CONNECTION_BOUND : case PN_CONNECTION_UNBOUND : case PN_CONNECTION_LOCAL_OPEN : case PN_CONNECTION_LOCAL_CLOSE : case PN_CONNECTION_FINAL : case PN_SESSION_INIT : case PN_SESSION_LOCAL_OPEN : case PN_SESSION_LOCAL_CLOSE : case PN_SESSION_FINAL : case PN_LINK_INIT : case PN_LINK_LOCAL_OPEN : case PN_LINK_LOCAL_CLOSE : case PN_LINK_LOCAL_DETACH : case PN_LINK_FINAL : case PN_TRANSPORT : case PN_TRANSPORT_ERROR : case PN_TRANSPORT_HEAD_CLOSED : case PN_TRANSPORT_TAIL_CLOSED : case PN_TRANSPORT_CLOSED : case PN_TRANSPORT_AUTHENTICATED : case PN_SELECTABLE_INIT : case PN_SELECTABLE_UPDATED : case PN_SELECTABLE_READABLE : case PN_SELECTABLE_WRITABLE : case PN_SELECTABLE_ERROR : case PN_SELECTABLE_EXPIRED : case PN_SELECTABLE_FINAL : break; } return 1; }
/* Process each event emitted by the protocol engine */ static void dispatcher(pn_handler_t *handler, pn_event_t *event, pn_event_type_t type) { protocolState_t *ps = PROTOCOL_STATE(handler); const configSettings_t *cfg = ps->config; //DBGPRINTF("omamqp1: Event received: %s\n", pn_event_type_name(type)); switch (type) { case PN_LINK_REMOTE_OPEN: DBGPRINTF("omamqp1: Message bus opened link.\n"); break; case PN_DELIVERY: // has the message been delivered to the message bus? if (ps->delivery) { assert(ps->delivery == pn_event_delivery(event)); if (pn_delivery_updated(ps->delivery)) { rsRetVal result = RS_RET_IDLE; uint64_t rs = pn_delivery_remote_state(ps->delivery); switch (rs) { case PN_ACCEPTED: DBGPRINTF("omamqp1: Message ACCEPTED by message bus\n"); result = RS_RET_OK; break; case PN_REJECTED: dbgprintf("omamqp1: message bus rejected log message: invalid message - dropping\n"); // message bus considers this a 'bad message'. Cannot be redelivered. // Likely a configuration error. Drop the message by returning OK result = RS_RET_OK; break; case PN_RELEASED: case PN_MODIFIED: // the message bus cannot accept the message. This may be temporary - retry // up to maxRetries before dropping if (++ps->retries >= cfg->maxRetries) { dbgprintf("omamqp1: message bus failed to accept message - dropping\n"); result = RS_RET_OK; } else { dbgprintf("omamqp1: message bus cannot accept message, retrying\n"); result = RS_RET_SUSPENDED; } break; case PN_RECEIVED: // not finished yet, wait for next delivery update break; default: // no other terminal states defined, so ignore anything else dbgprintf("omamqp1: unknown delivery state=0x%lX, assuming message accepted\n", (unsigned long) pn_delivery_remote_state(ps->delivery)); result = RS_RET_OK; break; } if (result != RS_RET_IDLE) { // the command is complete threadIPC_t *ipc = ps->ipc; pthread_mutex_lock(&ipc->lock); assert(ipc->command == COMMAND_SEND); ipc->result = result; ipc->command = COMMAND_DONE; pthread_cond_signal(&ipc->condition); pthread_mutex_unlock(&ipc->lock); pn_delivery_settle(ps->delivery); ps->delivery = NULL; if (result == RS_RET_OK) { ps->retries = 0; } } } } break; case PN_CONNECTION_BOUND: if (!cfg->bDisableSASL) { // force use of SASL, even allowing PLAIN authentication pn_sasl_t *sasl = pn_sasl(pn_event_transport(event)); #if PN_VERSION_MAJOR == 0 && PN_VERSION_MINOR >= 10 pn_sasl_set_allow_insecure_mechs(sasl, true); #else // proton version <= 0.9 only supports PLAIN authentication const char *user = cfg->username ? (char *)cfg->username : pn_url_get_username(cfg->url); if (user) { pn_sasl_plain(sasl, user, (cfg->password ? (char *) cfg->password : pn_url_get_password(cfg->url))); } #endif } if (cfg->idleTimeout) { // configured as seconds, set as milliseconds pn_transport_set_idle_timeout(pn_event_transport(event), cfg->idleTimeout * 1000); } break; case PN_CONNECTION_UNBOUND: DBGPRINTF("omamqp1: cleaning up connection resources\n"); pn_connection_release(pn_event_connection(event)); ps->conn = NULL; ps->sender = NULL; ps->delivery = NULL; break; case PN_TRANSPORT_ERROR: { // TODO: if auth failure, does it make sense to retry??? pn_transport_t *tport = pn_event_transport(event); pn_condition_t *cond = pn_transport_condition(tport); if (pn_condition_is_set(cond)) { _log_error("transport failure", cond); } dbgprintf("omamqp1: network transport failed, reconnecting...\n"); // the protocol thread will attempt to reconnect if it is not // being shut down } break; default: break; } }
/* Process each event posted by the reactor. */ static void event_handler(pn_handler_t *handler, pn_event_t *event, pn_event_type_t type) { app_data_t *data = GET_APP_DATA(handler); switch (type) { case PN_CONNECTION_INIT: { // Create and open all the endpoints needed to send a message // pn_connection_t *conn; pn_session_t *ssn; pn_link_t *sender; conn = pn_event_connection(event); pn_connection_open(conn); ssn = pn_session(conn); pn_session_open(ssn); sender = pn_sender(ssn, "MySender"); // we do not wait for ack until the last message pn_link_set_snd_settle_mode(sender, PN_SND_MIXED); if (!data->anon) { pn_terminus_set_address(pn_link_target(sender), data->target); } pn_link_open(sender); } break; case PN_LINK_FLOW: { // the remote has given us some credit, now we can send messages // static long tag = 0; // a simple tag generator pn_delivery_t *delivery; pn_link_t *sender = pn_event_link(event); int credit = pn_link_credit(sender); while (credit > 0 && data->count > 0) { --credit; --data->count; ++tag; delivery = pn_delivery(sender, pn_dtag((const char *)&tag, sizeof(tag))); pn_link_send(sender, data->msg_data, data->msg_len); pn_link_advance(sender); if (data->count > 0) { // send pre-settled until the last one, then wait for an ack on // the last sent message. This allows the sender to send // messages as fast as possible and then exit when the consumer // has dealt with the last one. // pn_delivery_settle(delivery); } } } break; case PN_DELIVERY: { // Since the example sends all messages but the last pre-settled // (pre-acked), only the last message's delivery will get updated with // the remote state (acked/nacked). // pn_delivery_t *dlv = pn_event_delivery(event); if (pn_delivery_updated(dlv) && pn_delivery_remote_state(dlv)) { uint64_t rs = pn_delivery_remote_state(dlv); int done = 1; switch (rs) { case PN_RECEIVED: // This is not a terminal state - it is informational, and the // peer is still processing the message. done = 0; break; case PN_ACCEPTED: pn_delivery_settle(dlv); if (!quiet) fprintf(stdout, "Send complete!\n"); break; case PN_REJECTED: case PN_RELEASED: case PN_MODIFIED: pn_delivery_settle(dlv); fprintf(stderr, "Message not accepted - code:%lu\n", (unsigned long)rs); break; default: // ??? no other terminal states defined, so ignore anything else pn_delivery_settle(dlv); fprintf(stderr, "Unknown delivery failure - code=%lu\n", (unsigned long)rs); break; } if (done) { // initiate clean shutdown of the endpoints pn_link_t *link = pn_delivery_link(dlv); pn_session_t *ssn = pn_link_session(link); pn_link_close(link); pn_session_close(ssn); pn_connection_close(pn_session_connection(ssn)); } } } break; case PN_TRANSPORT_ERROR: { // The connection to the peer failed. // pn_transport_t *tport = pn_event_transport(event); pn_condition_t *cond = pn_transport_condition(tport); fprintf(stderr, "Network transport failed!\n"); if (pn_condition_is_set(cond)) { const char *name = pn_condition_get_name(cond); const char *desc = pn_condition_get_description(cond); fprintf(stderr, " Error: %s Description: %s\n", (name) ? name : "<error name not provided>", (desc) ? desc : "<no description provided>"); } // pn_reactor_process() will exit with a false return value, stopping // the main loop. } break; default: break; } }