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diff --git a/src/server/Request.hpp b/src/server/Request.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_REQUEST_HPP
+#define INGEN_ENGINE_REQUEST_HPP
+
+#include <inttypes.h>
+#include <string>
+#include "ingen/ClientInterface.hpp"
+#include "EventSource.hpp"
+
+namespace Ingen {
+namespace Server {
+
+/** Record of a request (used to respond to clients).
+ *
+ * This is a glorified std::pair<ClientInterface*, int32_t> for replying
+ * to numbered messages from a client.
+ *
+ * For responses that involve several messages, the response will come first
+ * followed by the messages (eg object notifications, values, errors, etc.)
+ * in a bundle (or "transfer" if too large).
+ */
+class Request
+{
+public:
+	Request(EventSource*     source=0,
+	        ClientInterface* client=0,
+	        int32_t          id=1)
+		: _source(source)
+        , _client(client)
+		, _id(id)
+	{}
+
+	EventSource* source()           { return _source; }
+	int32_t      id() const         { return _id; }
+	void         set_id(int32_t id) { _id = id; }
+
+	ClientInterface* client() const { return _client; }
+	void set_client(ClientInterface* client) { _client = client; }
+
+    void unblock() {
+        if (_source)
+            _source->unblock();
+    }
+
+	void respond_ok() {
+		if (_client)
+			_client->response_ok(_id);
+	}
+
+	void respond_error(const std::string& msg) {
+		if (_client)
+			_client->response_error(_id, msg);
+	}
+
+private:
+    EventSource*     _source;
+	ClientInterface* _client;
+	int32_t          _id;
+};
+
+} // namespace Server
+} // namespace Ingen
+
+#endif // INGEN_ENGINE_REQUEST_HPP
+