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diff --git a/src/server/ClientBroadcaster.hpp b/src/server/ClientBroadcaster.hpp
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+/* This file is part of Ingen.
+ * Copyright 2007-2011 David Robillard <http://drobilla.net>
+ *
+ * Ingen is free software; you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free Software
+ * Foundation; either version 2 of the License, or (at your option) any later
+ * version.
+ *
+ * Ingen is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef INGEN_ENGINE_CLIENTBROADCASTER_HPP
+#define INGEN_ENGINE_CLIENTBROADCASTER_HPP
+
+#include <string>
+#include <list>
+#include <map>
+#include <pthread.h>
+#include "raul/SharedPtr.hpp"
+#include "ingen/ClientInterface.hpp"
+#include "NodeFactory.hpp"
+
+using namespace std;
+
+namespace Ingen {
+namespace Server {
+
+class GraphObjectImpl;
+class NodeImpl;
+class PortImpl;
+class PluginImpl;
+class PatchImpl;
+class ConnectionImpl;
+
+/** Broadcaster for all clients.
+ *
+ * This is a ClientInterface that forwards all messages to all registered
+ * clients (for updating all clients on state changes in the engine).
+ *
+ * \ingroup engine
+ */
+class ClientBroadcaster : public ClientInterface
+{
+public:
+	void register_client(const Raul::URI& uri, ClientInterface* client);
+	bool unregister_client(const Raul::URI& uri);
+
+	ClientInterface* client(const Raul::URI& uri);
+
+	void send_plugins(const NodeFactory::Plugins& plugin_list);
+	void send_plugins_to(ClientInterface*, const NodeFactory::Plugins& plugin_list);
+
+	void send_object(const GraphObjectImpl* p, bool recursive);
+
+#define BROADCAST(msg, ...) \
+	for (Clients::const_iterator i = _clients.begin(); i != _clients.end(); ++i) \
+		(*i).second->msg(__VA_ARGS__)
+
+	// CommonInterface
+
+	void bundle_begin() { BROADCAST(bundle_begin); }
+	void bundle_end()   { BROADCAST(bundle_end); }
+
+	void put(const Raul::URI&            uri,
+	         const Resource::Properties& properties,
+	         Resource::Graph             ctx=Resource::DEFAULT) {
+		BROADCAST(put, uri, properties);
+	}
+
+	void delta(const Raul::URI&            uri,
+	           const Resource::Properties& remove,
+	           const Resource::Properties& add) {
+		BROADCAST(delta, uri, remove, add);
+	}
+
+	void move(const Raul::Path& old_path,
+	          const Raul::Path& new_path) {
+		BROADCAST(move, old_path, new_path);
+	}
+
+	void del(const Raul::URI& uri) {
+		BROADCAST(del, uri);
+	}
+
+	void connect(const Raul::Path& src_port_path,
+	             const Raul::Path& dst_port_path) {
+		BROADCAST(connect, src_port_path, dst_port_path);
+	}
+
+	void disconnect(const Raul::URI& src,
+	                const Raul::URI& dst) {
+		BROADCAST(disconnect, src, dst);
+	}
+
+	void disconnect_all(const Raul::Path& parent_patch_path,
+	                    const Raul::Path& path) {
+		BROADCAST(disconnect_all, parent_patch_path, path);
+	}
+
+	void set_property(const Raul::URI&  subject,
+	                  const Raul::URI&  predicate,
+	                  const Raul::Atom& value) {
+		BROADCAST(set_property, subject, predicate, value);
+	}
+
+	// ClientInterface
+
+	Raul::URI uri() const { return "http://drobilla.net/ns/ingen#broadcaster"; } ///< N/A
+
+	void response_ok(int32_t id) {} ///< N/A
+	void response_error(int32_t id, const std::string& msg) {} ///< N/A
+
+	void error(const std::string& msg)    { BROADCAST(error, msg); }
+	void activity(const Raul::Path& path) { BROADCAST(activity, path); }
+
+private:
+	typedef std::map<Raul::URI, ClientInterface*> Clients;
+	Clients _clients;
+};
+
+} // namespace Server
+} // namespace Ingen
+
+#endif // INGEN_ENGINE_CLIENTBROADCASTER_HPP
+