initial commit

src/RelayReqMonitor.cpp

@@ -0,0 +1,57 @@
+#include "RelayServer.h"
+
+#include "ActiveMonitors.h"
+
+
+
+void RelayServer::runReqMonitor(ThreadPool<MsgReqMonitor>::Thread &thr) {
+    auto dbChangeWatcher = hoytech::file_change_monitor(dbDir + "/data.mdb");
+
+    dbChangeWatcher.setDebounce(100);
+
+    dbChangeWatcher.run([&](){
+        tpReqMonitor.dispatchToAll([]{ return MsgReqMonitor{MsgReqMonitor::DBChange{}}; });
+    });
+
+
+    ActiveMonitors monitors;
+    uint64_t currEventId = MAX_U64;
+
+    while (1) {
+        auto newMsgs = thr.inbox.pop_all();
+
+        auto txn = env.txn_ro();
+
+        uint64_t latestEventId = getMostRecentEventId(txn);
+        if (currEventId > latestEventId) currEventId = latestEventId;
+
+        for (auto &newMsg : newMsgs) {
+            if (auto msg = std::get_if<MsgReqMonitor::NewSub>(&newMsg.msg)) {
+                env.foreach_Event(txn, [&](auto &ev){
+                    if (msg->sub.filterGroup.doesMatch(ev.flat_nested())) {
+                        sendEvent(msg->sub.connId, msg->sub.subId, getEventJson(txn, ev.primaryKeyId));
+                    }
+
+                    return true;
+                }, false, msg->sub.latestEventId + 1);
+
+                msg->sub.latestEventId = latestEventId;
+
+                monitors.addSub(txn, std::move(msg->sub), latestEventId);
+            } else if (auto msg = std::get_if<MsgReqMonitor::RemoveSub>(&newMsg.msg)) {
+                monitors.removeSub(msg->connId, msg->subId);
+            } else if (auto msg = std::get_if<MsgReqMonitor::CloseConn>(&newMsg.msg)) {
+                monitors.closeConn(msg->connId);
+            } else if (std::get_if<MsgReqMonitor::DBChange>(&newMsg.msg)) {
+                env.foreach_Event(txn, [&](auto &ev){
+                    monitors.process(txn, ev, [&](RecipientList &&recipients, uint64_t quadId){
+                        sendEventToBatch(std::move(recipients), std::string(getEventJson(txn, quadId)));
+                    });
+                    return true;
+                }, false, currEventId + 1);
+
+                currEventId = latestEventId;
+            }
+        }
+    }
+}