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// Simple Match Example — End-to-end order matching with recovery
//
// Demonstrates the full Optiq-style flow:
// 1. Recovery Cause persists the incoming order
// 2. Business logic matches the order
// 3. Effect sends ack back to OE (Master only)
// 4. Effect publishes market data update
// 5. IACA fragments form a complete chain
//
// This bridges StockEx's match_order() with Optiq's Cause-Effect model.
// ════════════════════════════════════════════════════════════════════
#include "engine/SimplxShim.hpp"
#include "common/Book.hpp"
#include "recovery/RecoveryProxy.hpp"
#include "iaca/Fragment.hpp"
#include "iaca/IacaAggregator.hpp"
#include <iostream>
using namespace eunex;
using namespace eunex::recovery;
using namespace eunex::iaca;
int main() {
std::cout << "=== Simple Match with Recovery + IACA ===\n\n";
// ── Setup infrastructure ───────────────────────────────────────
FragmentStore store;
RecoveryProxy recoveryProxy(ORIGIN_BOOK, /*key=*/1, store, /*isMaster=*/true);
IacaAggregator aggregator;
int iaMessagesGenerated = 0;
aggregator.registerHandler(std::make_shared<NewOrderHandler>(
[&](const FragmentChain& chain) {
++iaMessagesGenerated;
std::cout << " [IACA] IA message generated from chain "
<< chain.chainId << " (" << chain.fragments.size()
<< " fragments)\n";
}
));
Book book(1);
// ── Process a sell order (Optiq-style) ─────────────────────────
std::cout << "── Processing SELL 100 @ 50.00 ──\n";
{
Order sellOrder{};
sellOrder.clOrdId = 1001;
sellOrder.symbolIdx = 1;
sellOrder.side = Side::Sell;
sellOrder.ordType = OrderType::Limit;
sellOrder.tif = TimeInForce::Day;
sellOrder.price = toFixedPrice(50.00);
sellOrder.quantity = 100;
// Step 1: Recovery Cause — persist the event
recoveryProxy.cause(/*persistenceId=*/1, sellOrder,
[&](uint64_t chainId, uint64_t seq) -> int {
// Step 2: IACA Cause — emit root fragment (BOOK)
IacaFragment bookFrag{};
bookFrag.chainId = chainId;
bookFrag.origin = {ORIGIN_BOOK, 1, seq};
bookFrag.previousOrigin = Origin::null();
bookFrag.causeId = CAUSE_NEW_ORDER_SELL;
bookFrag.nextCount = 1; // one child: the ack
// Step 3: Business logic — match the order
book.newOrder(sellOrder,
[](const Trade&) {},
[](const ExecutionReport& rpt) {
std::cout << " [ExecRpt] Status="
<< (int)rpt.status << " Remaining="
<< rpt.remainingQty << "\n";
}
);
// Step 4: Effect — send ack (Master only)
recoveryProxy.effect([&]() {
IacaFragment ackFrag{};
ackFrag.chainId = chainId;
ackFrag.origin = {ORIGIN_LOGICAL_CORE, 1, seq};
ackFrag.previousOrigin = bookFrag.origin;
ackFrag.causeId = CAUSE_ACK_DATA;
ackFrag.nextCount = 0;
aggregator.addFragment(ackFrag);
std::cout << " [Effect] Ack sent (Master)\n";
});
aggregator.addFragment(bookFrag);
return 0; // recovery nextCount always 0 for ME events
}
);
}
// ── Process a buy that matches ─────────────────────────────────
std::cout << "\n── Processing BUY 60 @ 50.00 ──\n";
{
Order buyOrder{};
buyOrder.clOrdId = 1002;
buyOrder.symbolIdx = 1;
buyOrder.side = Side::Buy;
buyOrder.ordType = OrderType::Limit;
buyOrder.tif = TimeInForce::Day;
buyOrder.price = toFixedPrice(50.00);
buyOrder.quantity = 60;
recoveryProxy.cause(2, buyOrder,
[&](uint64_t chainId, uint64_t seq) -> int {
IacaFragment bookFrag{};
bookFrag.chainId = chainId;
bookFrag.origin = {ORIGIN_BOOK, 1, seq};
bookFrag.previousOrigin = Origin::null();
bookFrag.causeId = CAUSE_NEW_ORDER_BUY;
bookFrag.nextCount = 2; // ack + trade
book.newOrder(buyOrder,
[&](const Trade& trade) {
std::cout << " [Trade] " << trade.quantity
<< " @ " << toDouble(trade.price) << "\n";
// IACA fragment for trade
recoveryProxy.effect([&]() {
IacaFragment tradeFrag{};
tradeFrag.chainId = chainId;
tradeFrag.origin = {ORIGIN_LOGICAL_CORE, 1, seq + 100};
tradeFrag.previousOrigin = bookFrag.origin;
tradeFrag.causeId = CAUSE_TRADE_DATA;
tradeFrag.nextCount = 0;
aggregator.addFragment(tradeFrag);
});
},
[](const ExecutionReport& rpt) {
std::cout << " [ExecRpt] Status="
<< (int)rpt.status << " Filled="
<< rpt.filledQty << "\n";
}
);
recoveryProxy.effect([&]() {
IacaFragment ackFrag{};
ackFrag.chainId = chainId;
ackFrag.origin = {ORIGIN_LOGICAL_CORE, 1, seq + 200};
ackFrag.previousOrigin = bookFrag.origin;
ackFrag.causeId = CAUSE_ACK_DATA;
ackFrag.nextCount = 0;
aggregator.addFragment(ackFrag);
});
aggregator.addFragment(bookFrag);
return 0;
}
);
}
// ── Summary ────────────────────────────────────────────────────
std::cout << "\n── Summary ───────────────────────────────\n";
std::cout << " Recovery fragments persisted: " << store.size() << "\n";
std::cout << " IACA chains completed: " << aggregator.completedChainCount() << "\n";
std::cout << " IA messages generated: " << iaMessagesGenerated << "\n";
std::cout << " Book state: " << book.bidCount() << " bids, "
<< book.askCount() << " asks\n";
auto bids = book.getBids(5);
auto asks = book.getAsks(5);
if (!asks.empty()) {
std::cout << " Best ask: " << toDouble(asks[0].price)
<< " x " << asks[0].totalQty << "\n";
}
if (!bids.empty()) {
std::cout << " Best bid: " << toDouble(bids[0].price)
<< " x " << bids[0].totalQty << "\n";
}
// ── Simulate Mirror replay ─────────────────────────────────────
std::cout << "\n── Mirror Replay Simulation ──────────────\n";
RecoveryProxy mirrorProxy(ORIGIN_BOOK, 1, store, /*isMaster=*/false);
Book mirrorBook(1);
// Effects should NOT fire on mirror
mirrorProxy.effect([]() {
std::cout << " [BUG] This should not print on Mirror!\n";
});
std::cout << " Mirror effect correctly skipped.\n";
// RecoveryEffect SHOULD fire on mirror
mirrorProxy.recoveryEffect([]() {
std::cout << " [RecoveryEffect] Mirror-only logic executed.\n";
});
std::cout << "\n=== Complete ===\n";
return 0;
}
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