QPID-3603: Add ErrorListener to Bridge to handle session errors.

Will be used in HA code.

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk/qpid@1335563 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 86 insertions, 0 deletions

diff --git a/cpp/src/qpid/ha/Primary.cpp b/cpp/src/qpid/ha/Primary.cpp
new file mode 100644
index 0000000000..bf17d27ca3
--- /dev/null
+++ b/cpp/src/qpid/ha/Primary.cpp
@@ -0,0 +1,86 @@
+/*
+ *
+ * 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 "Backup.h"
+#include "ConnectionExcluder.h"
+#include "HaBroker.h"
+#include "Primary.h"
+#include "qpid/broker/Broker.h"
+#include "qpid/broker/Queue.h"
+#include "qpid/framing/FieldTable.h"
+#include <boost/bind.hpp>
+
+namespace qpid {
+namespace ha {
+
+Primary* Primary::instance = 0;
+
+Primary::Primary(HaBroker& b) :
+    haBroker(b), logPrefix(b),
+    expected(b.getSettings().expectedBackups),
+    unready(0), activated(false)
+{
+    instance = this;            // Let queue replicators find us.
+    if (expected == 0)          // No need for ready check
+        activate(*(sys::Mutex::ScopedLock*)0); // fake lock, ok in ctor.
+    else {
+        // Set up the primary-ready check: ready when all queues have
+        // expected number of backups. Note clients are excluded at this point
+        // so dont't have to worry about changes to the set of queues.
+        HaBroker::QueueNames names = haBroker.getActiveBackups();
+        for (HaBroker::QueueNames::const_iterator i = names.begin(); i != names.end(); ++i)
+        {
+            queues[*i] = 0;
+            ++unready;
+            QPID_LOG(debug, logPrefix << "Need backup of " << *i
+                     << ", " << unready << " unready queues");
+        }
+        QPID_LOG(critical, "FIXME Primary " << queues.size() << " queues");
+        if (queues.empty())
+            activate(*(sys::Mutex::ScopedLock*)0); // fake lock, ok in ctor.
+        else {
+            QPID_LOG(debug, logPrefix << "Waiting for  " << expected
+                     << " backups on " << queues.size() << " queues");
+            // Allow backups to connect.
+            haBroker.getExcluder()->setBackupAllowed(true);
+        }
+    }
+}
+
+void Primary::addReplica(const std::string& q) {
+    sys::Mutex::ScopedLock l(lock);
+    if (!activated) {
+        QueueCounts::iterator i = queues.find(q);
+        if (i != queues.end()) {
+            ++i->second;
+            if (i->second == expected) --unready;
+            QPID_LOG(debug, logPrefix << i->second << " backups caught up on " << q
+                     << ", " << unready << " unready queues");
+            if (unready == 0) activate(l);
+        }
+    }
+}
+
+void Primary::activate(sys::Mutex::ScopedLock&) {
+    activated = true;
+    haBroker.activate();
+}
+
+}} // namespace qpid::ha