feat: add messaging transport rollout

tests/application/test_messaging_event_publisher.py

@@ -0,0 +1,131 @@
+"""Slot transition event emission tests (REQ-021 + REQ-023 + REQ-018 hook)."""
+from __future__ import annotations
+
+import threading
+import time
+from datetime import date
+
+from trex_core.adapters.broker.paper import PaperBroker
+from trex_core.adapters.ledger.in_memory import InMemoryLedger
+from trex_core.adapters.messaging import topology
+from trex_core.adapters.messaging.in_memory import InMemoryTransport
+from trex_core.adapters.persistence.in_memory_intent_store import InMemoryIntentStore
+from trex_core.application.execution import ExecutionService
+from trex_core.application.intents import BuyIntent, IntentService
+from trex_core.application.ledger_outbox import InMemoryLedgerOutbox, LedgerWriter
+from trex_core.application.messaging_handlers import slot_transition_event_payload
+from trex_core.domain.slot import SlotService, SlotState
+from trex_core.domain.slot.in_memory_repository import InMemorySlotRepository
+
+DAY = date(2026, 6, 5)
+
+
+def _wire(transport):
+    repo = InMemorySlotRepository()
+    svc = SlotService(repo)
+    intents = IntentService(svc, repo, InMemoryIntentStore())
+    outbox = InMemoryLedgerOutbox()
+    ledger = InMemoryLedger()
+    writer = LedgerWriter(outbox, ledger)
+    svc.preallocate_daily_slots(DAY, 3)
+
+    def emitter(event_type: str, slot) -> None:
+        rk = topology.event_routing_key(event_type, slot.strategy_id or "_", slot.symbol or "_")
+        payload = slot_transition_event_payload(slot, event_type=event_type)
+        try:
+            transport.publish_event(rk, payload)
+        except Exception:  # noqa: BLE001
+            pass
+
+    execution = ExecutionService(svc, repo, PaperBroker(fill_after_polls=0),
+                                 ledger_outbox=outbox, event_emitter=emitter)
+    return repo, svc, intents, execution, writer
+
+
+def test_fill_emits_slot_filled_event_with_routing_key_and_state():
+    transport = InMemoryTransport()
+    received: list[tuple[str, dict]] = []
+    stop = threading.Event()
+    th = threading.Thread(
+        target=transport.consume_events_forever,
+        args=("trex.events.strategy.A", topology.strategy_event_binding_pattern("A"),
+              lambda rk, p: received.append((rk, p)), stop),
+        daemon=True,
+    )
+    th.start()
+    time.sleep(0.05)
+
+    repo, _, intents, execution, _ = _wire(transport)
+    intents.submit_buy(BuyIntent(
+        intent_id="b1", trading_date=DAY, symbol="005930", qty=10,
+        strategy_id="A", portfolio_id="PF-1",
+    ))
+    execution.run_once()
+    time.sleep(0.05)
+    stop.set()
+    th.join(timeout=1.0)
+
+    assert len(received) == 1
+    rk, payload = received[0]
+    assert rk == "slot_filled_buy.A.005930"
+    # payload carries current state + monotonic sequence (REQ-023 AC-5)
+    assert payload["event_type"] == "slot_filled_buy"
+    assert payload["status"] == SlotState.HOLDING.value
+    assert payload["strategy_id"] == "A"
+    assert payload["symbol"] == "005930"
+    assert "sequence_at" in payload  # last-wins ordering token
+
+
+def test_event_for_strategy_a_does_not_reach_strategy_b_queue():
+    """REQ-021 AC-4: per-strategy routing key binding filters at the broker."""
+    transport = InMemoryTransport()
+    received_a: list[tuple[str, dict]] = []
+    received_b: list[tuple[str, dict]] = []
+    stop = threading.Event()
+    th_a = threading.Thread(
+        target=transport.consume_events_forever,
+        args=("q.A", topology.strategy_event_binding_pattern("A"),
+              lambda rk, p: received_a.append((rk, p)), stop),
+        daemon=True,
+    )
+    th_b = threading.Thread(
+        target=transport.consume_events_forever,
+        args=("q.B", topology.strategy_event_binding_pattern("B"),
+              lambda rk, p: received_b.append((rk, p)), stop),
+        daemon=True,
+    )
+    th_a.start()
+    th_b.start()
+    time.sleep(0.05)
+
+    _, _, intents, execution, _ = _wire(transport)
+    intents.submit_buy(BuyIntent(
+        intent_id="b1", trading_date=DAY, symbol="005930", qty=10,
+        strategy_id="A", portfolio_id="PF-1",
+    ))
+    execution.run_once()
+    time.sleep(0.05)
+    stop.set()
+    th_a.join(timeout=1.0)
+    th_b.join(timeout=1.0)
+
+    assert any(rk == "slot_filled_buy.A.005930" for rk, _ in received_a)
+    assert received_b == []
+
+
+def test_publish_failure_does_not_break_execution_loop():
+    """Publish errors must NOT roll back slot transitions or ledger enqueue."""
+    transport = InMemoryTransport()
+    transport.set_available(False)  # all publishes will raise TransportUnavailableError
+
+    repo, _, intents, execution, _ = _wire(transport)
+    intents.submit_buy(BuyIntent(
+        intent_id="b1", trading_date=DAY, symbol="005930", qty=10,
+        strategy_id="A", portfolio_id="PF-1",
+    ))
+    r = execution.run_once()
+    # Slot still transitioned; ledger still enqueued.
+    assert r.filled == 1
+    assert r.ledger_enqueued == 1
+    pending = [s for s in repo.list_slots(DAY) if s.status is SlotState.HOLDING]
+    assert len(pending) == 1