1 files changed, 110 insertions, 0 deletions
diff --git a/cpp/src/qpid/cluster/StoreStatus.cpp b/cpp/src/qpid/cluster/StoreStatus.cpp
new file mode 100644
index 0000000000..6e412c23f7
--- /dev/null
+++ b/cpp/src/qpid/cluster/StoreStatus.cpp
@@ -0,0 +1,110 @@
+/*
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ *
+ */
+#include "StoreStatus.h"
+#include "qpid/Exception.h"
+#include <boost/filesystem/path.hpp>
+#include <boost/filesystem/fstream.hpp>
+#include <boost/filesystem/operations.hpp>
+#include <fstream>
+
+namespace qpid {
+namespace cluster {
+
+using framing::Uuid;
+using namespace framing::cluster;
+namespace fs=boost::filesystem;
+using std::ostream;
+
+StoreStatus::StoreStatus(const std::string& d)
+    : state(STORE_STATE_NO_STORE), dataDir(d)
+{}
+
+namespace {
+
+const char* SUBDIR="cluster";
+const char* CLUSTER_ID_FILE="cluster.uuid";
+const char* SHUTDOWN_ID_FILE="shutdown.uuid";
+
+Uuid loadUuid(const fs::path& path) {
+    Uuid ret;
+    if (exists(path)) {
+        fs::ifstream i(path);
+        i >> ret;
+    }
+    return ret;
+}
+
+void saveUuid(const fs::path& path, const Uuid& uuid) {
+    fs::ofstream o(path);
+    o << uuid;
+}
+
+} // namespace
+
+
+void StoreStatus::load() {
+    fs::path dir = fs::path(dataDir, fs::native)/SUBDIR;
+    create_directory(dir);
+    clusterId = loadUuid(dir/CLUSTER_ID_FILE);
+    shutdownId = loadUuid(dir/SHUTDOWN_ID_FILE);
+
+    if (clusterId && shutdownId) state = STORE_STATE_CLEAN_STORE;
+    else if (clusterId) state = STORE_STATE_DIRTY_STORE;
+    else state = STORE_STATE_EMPTY_STORE;
+}
+
+void StoreStatus::save() {
+    fs::path dir = fs::path(dataDir, fs::native)/SUBDIR;
+    create_directory(dir);
+    saveUuid(dir/CLUSTER_ID_FILE, clusterId);
+    saveUuid(dir/SHUTDOWN_ID_FILE, shutdownId);
+}
+
+void StoreStatus::dirty(const Uuid& clusterId_) {
+    clusterId = clusterId_;
+    shutdownId = Uuid();
+    state = STORE_STATE_DIRTY_STORE;
+    save();
+}
+
+void StoreStatus::clean(const Uuid& shutdownId_) {
+    state = STORE_STATE_CLEAN_STORE;
+    shutdownId = shutdownId_;
+    save();
+}
+
+ostream& operator<<(ostream& o, const StoreStatus& s) {
+    switch (s.getState()) {
+      case STORE_STATE_NO_STORE: o << "no store"; break;
+      case STORE_STATE_EMPTY_STORE: o << "empty store"; break;
+      case STORE_STATE_DIRTY_STORE:
+        o << "dirty store, cluster-id=" << s.getClusterId();
+        break;
+      case STORE_STATE_CLEAN_STORE:
+        o << "clean store, cluster-id=" << s.getClusterId()
+          << " shutdown-id=" << s.getShutdownId();
+        break;
+    }
+    return o;
+}
+
+}} // namespace qpid::cluster
+