1 files changed, 121 insertions, 0 deletions
diff --git a/qpid/cpp/src/qpid/ha/ConnectionObserver.cpp b/qpid/cpp/src/qpid/ha/ConnectionObserver.cpp
new file mode 100644
index 0000000000..a824adb871
--- /dev/null
+++ b/qpid/cpp/src/qpid/ha/ConnectionObserver.cpp
@@ -0,0 +1,121 @@
+/*
+ *
+ * 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/Url.h"
+#include "qpid/types/Variant.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(hb.logPrefix), self(uuid) {}
+
+bool ConnectionObserver::getBrokerInfo(const broker::Connection& connection, BrokerInfo& info) {
+    qpid::types::Variant::Map::const_iterator i = connection.getClientProperties().find(ConnectionObserver::BACKUP_TAG);
+    if (i != connection.getClientProperties().end() && i->second.getType() == qpid::types::VAR_MAP) {
+        info = BrokerInfo(i->second.asMap());
+        return true;
+    }
+    return false;
+}
+
+bool ConnectionObserver::getAddress(const broker::Connection& connection, Address& addr) {
+    qpid::types::Variant::Map::const_iterator i = connection.getClientProperties().find(ConnectionObserver::ADDRESS_TAG);
+    if (i != connection.getClientProperties().end()) {
+        Url url;
+        url.parseNoThrow(i->second.asString().c_str());
+        if (!url.empty()) {
+            addr = url[0];
+            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::reset() {
+    sys::Mutex::ScopedLock l(lock);
+    observer.reset();
+}
+
+bool ConnectionObserver::isSelf(const broker::Connection& connection) {
+    BrokerInfo info;
+    return getBrokerInfo(connection, info) && info.getSystemId() == self;
+}
+
+void ConnectionObserver::opened(broker::Connection& connection) {
+    try {
+        if (isSelf(connection)) { // Reject self connections
+            // Set my own address if there is an address header.
+            Address addr;
+            if (getAddress(connection, addr)) haBroker.setAddress(addr);
+            QPID_LOG(trace, logPrefix << "Rejected self connection "+connection.getMgmtId());
+            connection.abort();
+            return;
+        }
+        if (connection.isLink()) return; // Allow outgoing links.
+        if (connection.getClientProperties().find(ADMIN_TAG) != connection.getClientProperties().end()) {
+            QPID_LOG(trace, logPrefix << "Accepted admin connection: " << connection.getMgmtId());
+            return;                 // No need to call observer, always allow admins.
+        }
+        ObserverPtr o(getObserver());
+        if (o) o->opened(connection);
+    }
+    catch (const std::exception& e) {
+        QPID_LOG(error, logPrefix << "Error on incoming connection " << connection.getMgmtId()
+                 << ": " << e.what());
+        throw;
+    }
+}
+
+void ConnectionObserver::closed(broker::Connection& connection) {
+    if (isSelf(connection)) return; // Ignore closing of self connections.
+    try {
+        ObserverPtr o(getObserver());
+        if (o) o->closed(connection);
+    }
+    catch (const std::exception& e) {
+        QPID_LOG(error, logPrefix << "Error closing incoming connection " << connection.getMgmtId()
+                 << ": " << e.what());
+        throw;
+    }
+}
+
+const std::string ConnectionObserver::ADMIN_TAG="qpid.ha-admin";
+const std::string ConnectionObserver::BACKUP_TAG="qpid.ha-backup";
+const std::string ConnectionObserver::ADDRESS_TAG="qpid.ha-address";
+
+}} // namespace qpid::ha