1 files changed, 94 insertions, 0 deletions
diff --git a/qpid/cpp/src/qpid/Plugin.cpp b/qpid/cpp/src/qpid/Plugin.cpp
new file mode 100644
index 0000000000..196b5c2333
--- /dev/null
+++ b/qpid/cpp/src/qpid/Plugin.cpp
@@ -0,0 +1,94 @@
+/*
+ * 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 "qpid/Plugin.h"
+#include "qpid/Options.h"
+#include <boost/bind.hpp>
+#include <algorithm>
+
+namespace qpid {
+
+namespace {
+
+Plugin::Plugins& thePlugins() {
+    // This is a single threaded singleton implementation so
+    // it is important to be sure that the first use of this
+    // singleton is when the program is still single threaded
+    static Plugin::Plugins plugins;
+    return plugins;
+}
+
+void invoke(boost::function<void()> f) { f(); }
+
+} // namespace
+
+Plugin::Target::~Target() { finalize(); }
+
+void Plugin::Target::finalize() {
+    std::for_each(finalizers.begin(), finalizers.end(), invoke);
+    finalizers.clear();
+}
+
+void Plugin::Target::addFinalizer(const boost::function<void()>& f) {
+    finalizers.push_back(f);
+}
+
+namespace {
+bool initBefore(const Plugin* a, const Plugin* b) {
+    return a->initOrder() < b->initOrder();
+}
+}
+
+Plugin::Plugin() {
+    // Register myself.
+    thePlugins().push_back(this);
+    std::sort(thePlugins().begin(), thePlugins().end(), &initBefore);
+}
+
+Plugin::~Plugin() {}
+
+Options*  Plugin::getOptions() { return 0; }
+
+const Plugin::Plugins& Plugin::getPlugins() { return thePlugins(); }
+
+namespace {
+template <class F> void each_plugin(const F& f) {
+    std::for_each(Plugin::getPlugins().begin(), Plugin::getPlugins().end(), f);
+}
+}
+
+void Plugin::addOptions(Options& opts) {
+    for (Plugins::const_iterator i = getPlugins().begin(); i != getPlugins().end(); ++i) {
+        if ((*i)->getOptions())
+            opts.add(*(*i)->getOptions());
+    }
+}
+
+int Plugin::initOrder() const { return DEFAULT_INIT_ORDER; }
+
+void Plugin::earlyInitAll(Target& t) {
+    each_plugin(boost::bind(&Plugin::earlyInitialize, _1, boost::ref(t)));
+}
+
+void Plugin::initializeAll(Target& t) {
+    each_plugin(boost::bind(&Plugin::initialize, _1, boost::ref(t)));
+}
+
+} // namespace qpid