* src/qpid/broker/Plugin.h: Base class for plug-in objects.

	Plugins can contribute configuration options and can call
	extension point functions on the broker.
	
	* src/qpid/broker/ChannelInitializer.h: Interface for plug-in
	objects that want to modify newly created channels, e.g. to
	modify the handler chains.
	
	* src/qpid/broker/Broker.h: Added extension point for plug-ins to
	contribute ChannelInitializer objects.


git-svn-id: https://svn.apache.org/repos/asf/incubator/qpid/trunk/qpid@551363 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 67 insertions, 0 deletions

diff --git a/cpp/src/qpid/broker/Plugin.cpp b/cpp/src/qpid/broker/Plugin.cpp
new file mode 100644
index 0000000000..f018c4e152
--- /dev/null
+++ b/cpp/src/qpid/broker/Plugin.cpp
@@ -0,0 +1,67 @@
+/*
+ *
+ * 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 "Plugin.h"
+
+namespace qpid {
+namespace broker {
+
+std::vector<Plugin*> Plugin::plugins;
+
+Plugin::Plugin() {
+    // Register myself.
+    plugins.push_back(this);
+}
+
+Plugin::~Plugin() {}
+
+Options*  Plugin::getOptions() { return 0; }
+
+void  Plugin::start(Broker&) {}
+
+void  Plugin::finish(Broker&) {}
+
+const std::vector<Plugin*>& Plugin::getPlugins() { return plugins; }
+
+#ifdef USE_APR_PLATFORM
+
+#include "qpid/sys/apr/APRBase.h"
+#include "qpid/sys/apr/APRPool.h"
+#include <apr_dso.h>
+
+void Plugin::dlopen(const std::string& name) {
+    apr_dso_handle_t* handle;
+    CHECK_APR_SUCCESS(
+        apr_dso_load(&handle, name.c_str(), sys::APRPool::get()));
+}
+
+#else // Posix
+
+#include <dlfcn.h>
+
+void Plugin::dlopen(const std::string& name) {
+    dlerror();
+    dlopen(name.c_str(), RTLD_NOW);
+    const char* error = dlerror();
+    if (error) {
+        THROW_QPID_ERROR(INTERNAL_ERROR, error);
+    }
+}
+#endif // USE_APR_PLATFORM
+
+}} // namespace qpid::broker