1 files changed, 94 insertions, 0 deletions
diff --git a/cpp/src/qpid/ha/ConnectionObserver.cpp b/cpp/src/qpid/ha/ConnectionObserver.cpp
new file mode 100644
index 0000000000..3f7a1710d9
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+++ b/cpp/src/qpid/ha/ConnectionObserver.cpp
@@ -0,0 +1,94 @@
+/*
+ *
+ * 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 "ConnectionObserver.h"
+#include "BrokerInfo.h"
+#include "HaBroker.h"
+#include "qpid/framing/FieldTable.h"
+#include "qpid/broker/Connection.h"
+#include "qpid/log/Statement.h"
+
+namespace qpid {
+namespace ha {
+
+ConnectionObserver::ConnectionObserver(HaBroker& hb, const types::Uuid& uuid)
+    : haBroker(hb), logPrefix("Connections: "), self(uuid) {}
+
+bool ConnectionObserver::getBrokerInfo(broker::Connection& connection, BrokerInfo& info) {
+    framing::FieldTable ft;
+    if (connection.getClientProperties().getTable(ConnectionObserver::BACKUP_TAG, ft)) {
+        info = BrokerInfo(ft);
+        return true;
+    }
+    return false;
+}
+
+void ConnectionObserver::setObserver(const ObserverPtr& o){
+    sys::Mutex::ScopedLock l(lock);
+    observer = o;
+}
+
+ConnectionObserver::ObserverPtr ConnectionObserver::getObserver() {
+    sys::Mutex::ScopedLock l(lock);
+    return observer;
+}
+
+void ConnectionObserver::opened(broker::Connection& connection) {
+    try {
+        if (connection.isLink()) return; // Allow outgoing links.
+        if (connection.getClientProperties().isSet(ADMIN_TAG)) {
+            QPID_LOG(debug, logPrefix << "Allowing admin connection: "
+                     << connection.getMgmtId());
+            return;                 // No need to call observer, always allow admins.
+        }
+        BrokerInfo info;            // Avoid self connections.
+        if (getBrokerInfo(connection, info)) {
+            if (info.getSystemId() == self) {
+                QPID_LOG(debug, "HA broker rejected self connection "+connection.getMgmtId());
+                connection.abort();
+            }
+
+        }
+        ObserverPtr o(getObserver());
+        if (o) o->opened(connection);
+    }
+    catch (const std::exception& e) {
+        QPID_LOG(error, logPrefix << "Open error: " << e.what());
+        throw;
+    }
+}
+
+void ConnectionObserver::closed(broker::Connection& connection) {
+    try {
+        BrokerInfo info;
+        ObserverPtr o(getObserver());
+        if (o) o->closed(connection);
+    }
+    catch (const std::exception& e) {
+        QPID_LOG(error, logPrefix << "Close error: " << e.what());
+        throw;
+    }
+}
+
+const std::string ConnectionObserver::ADMIN_TAG="qpid.ha-admin";
+const std::string ConnectionObserver::BACKUP_TAG="qpid.ha-backup";
+
+}} // namespace qpid::ha