Update from trunk r1375509 through r1450773asyncstore

git-svn-id: https://svn.apache.org/repos/asf/qpid/branches/asyncstore@1451244 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 71 insertions, 0 deletions

diff --git a/cpp/src/qpid/ha/StatusCheck.h b/cpp/src/qpid/ha/StatusCheck.h
new file mode 100644
index 0000000000..997ced4159
--- /dev/null
+++ b/cpp/src/qpid/ha/StatusCheck.h
@@ -0,0 +1,71 @@
+#ifndef QPID_HA_STATUSCHECK_H
+#define QPID_HA_STATUSCHECK_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 "BrokerInfo.h"
+#include "qpid/Url.h"
+#include "qpid/sys/Thread.h"
+#include "qpid/sys/Mutex.h"
+#include "qpid/sys/Runnable.h"
+#include <vector>
+
+namespace qpid {
+namespace ha {
+
+// FIXME aconway 2012-12-21: This solution is incomplete. It will only protect
+// against bad promotion if there are READY brokers when this broker starts.
+// It will not help the situation where brokers became READY after this one starts.
+//
+
+/**
+ * Check whether a JOINING broker can be promoted .
+ *
+ * A JOINING broker can be promoted as long as all the other brokers are also
+ * JOINING. If there are READY brokers in the cluster the JOINING broker should
+ * refuse to promote so that one of the READY brokers can. This situation
+ * only comes about if the primary is dead and no new primary has been promoted.
+ *
+ * THREAD SAFE: setUrl and canPromote are called in arbitrary management threads.
+ */
+class StatusCheck
+{
+  public:
+    StatusCheck(const std::string& logPrefix, uint16_t linkHeartbeatInteval, const BrokerInfo& self);
+    ~StatusCheck();
+    void setUrl(const Url&);
+    bool canPromote();
+
+  private:
+    void setPromote(bool p);
+
+    std::string logPrefix;
+    sys::Mutex lock;
+    std::vector<sys::Thread> threads;
+    bool promote;
+    uint16_t linkHeartbeatInterval;
+    BrokerInfo brokerInfo;
+  friend class StatusCheckThread;
+};
+}} // namespace qpid::ha
+
+#endif  /*!QPID_HA_STATUSCHECK_H*/