Support for restarting a persistent cluster.

Option --cluster-size=N: members wait for N members before recovering store.
Stores marked as clean/dirty. Automatically recover from clean store on restart.
Stores marked with UUID to detect errors.

Not yet implemented: consistency checks, manual recovery from all dirty stores.


git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk/qpid@883842 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 61 insertions, 0 deletions

diff --git a/cpp/src/qpid/cluster/StoreStatus.h b/cpp/src/qpid/cluster/StoreStatus.h
new file mode 100644
index 0000000000..b4c6bda480
--- /dev/null
+++ b/cpp/src/qpid/cluster/StoreStatus.h
@@ -0,0 +1,61 @@
+#ifndef QPID_CLUSTER_STORESTATE_H
+#define QPID_CLUSTER_STORESTATE_H
+
+/*
+ *
+ * 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 "qpid/framing/Uuid.h"
+#include "qpid/framing/enum.h"
+
+namespace qpid {
+namespace cluster {
+
+/**
+ * State of the store for cluster purposes.
+ */
+class StoreStatus
+{
+  public:
+    typedef framing::Uuid Uuid;
+    typedef framing::cluster::StoreState StoreState;
+
+    StoreStatus(const std::string& dir);
+
+    framing::cluster::StoreState getState() const { return state; }
+    Uuid getStart() const { return start; }
+    Uuid getStop() const { return stop; }
+
+    void dirty(const Uuid& start); // Start using the store.
+    void clean(const Uuid& stop); // Stop using the store.
+
+    void load();
+    void save();
+
+    bool hasStore() { return state != framing::cluster::STORE_STATE_NO_STORE; }
+    bool isEmpty() { return state != framing::cluster::STORE_STATE_EMPTY_STORE; }
+  private:
+    framing::cluster::StoreState state;
+    Uuid start, stop;
+    std::string dataDir;
+};
+}} // namespace qpid::cluster
+
+#endif  /*!QPID_CLUSTER_STORESTATE_H*/