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+#ifndef QPID_BROKER_CONNECTIONOBSERVERS_H
+#define QPID_BROKER_CONNECTIONOBSERVERS_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 "ConnectionObserver.h"
+#include "qpid/sys/Mutex.h"
+#include <set>
+#include <algorithm>
+
+namespace qpid {
+namespace broker {
+
+/**
+ * A collection of connection observers.
+ * Calling a ConnectionObserver function will call that function on each observer.
+ * THREAD SAFE.
+ */
+class ConnectionObservers : public ConnectionObserver {
+ public:
+ void add(boost::shared_ptr<ConnectionObserver> observer) {
+ sys::Mutex::ScopedLock l(lock);
+ observers.insert(observer);
+ }
+
+ void remove(boost::shared_ptr<ConnectionObserver> observer) {
+ sys::Mutex::ScopedLock l(lock);
+ observers.erase(observer);
+ }
+
+ void connection(Connection& c) {
+ each(boost::bind(&ConnectionObserver::connection, _1, boost::ref(c)));
+ }
+
+ void opened(Connection& c) {
+ each(boost::bind(&ConnectionObserver::opened, _1, boost::ref(c)));
+ }
+
+ void closed(Connection& c) {
+ each(boost::bind(&ConnectionObserver::closed, _1, boost::ref(c)));
+ }
+
+ void forced(Connection& c, const std::string& text) {
+ each(boost::bind(&ConnectionObserver::forced, _1, boost::ref(c), text));
+ }
+
+ private:
+ typedef std::set<boost::shared_ptr<ConnectionObserver> > Observers;
+ sys::Mutex lock;
+ Observers observers;
+
+ template <class F> void each(F f) {
+ sys::Mutex::ScopedLock l(lock);
+ std::for_each(observers.begin(), observers.end(), f);
+ }
+};
+
+}} // namespace qpid::broker
+
+#endif /*!QPID_BROKER_CONNECTIONOBSERVERS_H*/