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Diffstat (limited to 'cpp/src/qpid/broker/Plugin.h')
-rw-r--r-- | cpp/src/qpid/broker/Plugin.h | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/cpp/src/qpid/broker/Plugin.h b/cpp/src/qpid/broker/Plugin.h new file mode 100644 index 0000000000..8c794b86a0 --- /dev/null +++ b/cpp/src/qpid/broker/Plugin.h @@ -0,0 +1,80 @@ +#ifndef QPID_BROKER_PLUGIN_H +#define QPID_BROKER_PLUGIN_H + +/* + * + * Copyright (c) 2006 The Apache Software Foundation + * + * Licensed 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 "qpid/Options.h" +#include "qpid/broker/Broker.h" +#include <boost/noncopyable.hpp> +#include <vector> + +namespace qpid { +namespace broker { + +/** + * Inherit broker plug-ins from this class, override the virtual + * functions and create a global (or class static member) instance in + * a shared library. When the library is loaded your plug-in will be + * registered. + */ +class Plugin : boost::noncopyable +{ + public: + /** Constructor registers the plugin to appear in getPlugins(). + * Note: Plugin subclasses should only be constructed during + * static initialization, i.e. they should only be declared + * as global or static member variables. + */ + Plugin(); + + virtual ~Plugin(); + + /** + * Override if your plugin has configuration options. + * They will be included in options parsing prior to broker + * creation setup. + *@return An options group or 0. Default returns 0. + */ + virtual Options* getOptions(); + + /** Called immediately after broker creation to allow plug-ins + * to do whatever they do to the broker, e.g. add handler chain + * manipulators. + */ + virtual void start(Broker& b); + + /** Called just before broker shutdown. Default does nothing */ + virtual void finish(Broker& b); + + /** Get the list of registered plug-ins. */ + static const std::vector<Plugin*>& getPlugins(); + + /** Load a shared library (that contains plugins presumably!) */ + static void dlopen(const std::string& libname); + + private: + static std::vector<Plugin*> plugins; +}; + +}} // namespace qpid::broker + + + + +#endif /*!QPID_BROKER_PLUGIN_H*/ |