commit 6524b9d8385919276d21471bec4352b00146c2d0
author Dhruvaraj Subhashchandran <dhruvaraj@in.ibm.com> Wed Oct 18 01:41:51 2017 -0500
committer Brad Bishop <bradleyb@fuzziesquirrel.com> Wed Apr 11 05:05:20 2018 +0000
tree 6e6097c7c798ef96cd03b2864a8de908606925ca
parent 06fdaff4bbfadf84123d5275433318e82643807a

Add persistency for events

Persist event D-bus objects using cereal

Resolves openbmc/openbmc#2319

Change-Id: Ifa15d944fe1d1026761f65eeb647dcbdf6afdba0
Signed-off-by: Dhruvaraj Subhashchandran <dhruvaraj@in.ibm.com>

src/event_manager.cpp

diff --git a/src/event_manager.cpp b/src/event_manager.cpp
index 6e7d302..57a8478 100644
--- a/src/event_manager.cpp
+++ b/src/event_manager.cpp
@@ -17,6 +17,7 @@
 #include "config.h"
 #include "event.hpp"
 #include "event_manager.hpp"
+#include "event_serialize.hpp"
 
 #include <experimental/filesystem>
 
@@ -66,13 +67,62 @@
     // event.
     if (eventQueue.size() == MAX_EVENTS)
     {
+        fs::path eventPath(EVENTS_PERSIST_PATH);
+        eventPath /= eventName;
+        eventPath /= std::to_string(eventQueue.front()->timestamp());
         eventQueue.pop();
+        std::error_code ec;
+        fs::remove(eventPath, ec);
     }
 
-    eventQueue.emplace(std::make_unique<Entry>(objPath,
-                                               ms, // Milliseconds since 1970
-                                               std::move(msg),
-                                               std::move(additionalData)));
+    auto event =
+        std::make_unique<Entry>(objPath,
+                                ms, // Milliseconds since 1970
+                                std::move(msg), std::move(additionalData));
+    serialize(*event, eventName);
+    eventQueue.push(std::move(event));
+}
+
+void Manager::restore()
+{
+    if (!fs::exists(EVENTS_PERSIST_PATH) || fs::is_empty(EVENTS_PERSIST_PATH))
+    {
+        return;
+    }
+
+    for (auto& eventFile :
+         fs::recursive_directory_iterator(EVENTS_PERSIST_PATH))
+    {
+        if (!fs::is_regular_file(eventFile))
+        {
+            continue;
+        }
+
+        EventQueue events;
+
+        auto eventPath = eventFile.path().string();
+        auto pos1 = eventPath.rfind("/");
+        auto pos2 = eventPath.rfind("/", pos1 - 1) + 1;
+        auto eventName = eventPath.substr(pos2, (pos1 - pos2));
+        auto validEvent = false;
+        auto timestamp = eventFile.path().filename().string();
+        auto tsNum = std::stoll(timestamp);
+        auto objPath =
+            std::string(OBJ_EVENT) + '/' + eventName + '/' + timestamp;
+
+        auto event = std::make_unique<Entry>(objPath, tsNum);
+        if (deserialize(eventFile.path(), *event))
+        {
+            event->emit_object_added();
+            events.push(std::move(event));
+            validEvent = true;
+        }
+
+        if (validEvent)
+        {
+            eventMap[eventName] = std::move(events);
+        }
+    }
 }
 
 Manager& getManager()