Adding upstream version 2.4.1.upstream/2.4.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 53 insertions, 0 deletions

diff --git a/src/lib/database/server_collection.h b/src/lib/database/server_collection.h
new file mode 100644
index 0000000..fe9d91f
--- /dev/null
+++ b/src/lib/database/server_collection.h
@@ -0,0 +1,53 @@
+// Copyright (C) 2019 Internet Systems Consortium, Inc. ("ISC")
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#ifndef DB_SERVER_COLLECTION_H
+#define DB_SERVER_COLLECTION_H
+
+#include <database/server.h>
+#include <boost/multi_index/mem_fun.hpp>
+#include <boost/multi_index/indexed_by.hpp>
+#include <boost/multi_index/ordered_index.hpp>
+#include <boost/multi_index_container.hpp>
+
+namespace isc {
+namespace db {
+
+/// @brief Tag identifying an index by server tag.
+struct ServerTagIndexTag { };
+
+/// @brief Multi index container for @c Server.
+///
+/// It merely contains one index at the moment, but the number of
+/// indexes is likely to grow.
+typedef boost::multi_index_container<
+    ServerPtr,
+    boost::multi_index::indexed_by<
+        boost::multi_index::ordered_unique<
+            boost::multi_index::tag<ServerTagIndexTag>,
+            boost::multi_index::const_mem_fun<Server, std::string,
+                                              &Server::getServerTagAsText>
+        >
+    >
+> ServerCollection;
+
+/// @brief Utility class used to fetch @c Server objects from the
+/// @c ServerCollection.
+class ServerFetcher {
+public:
+
+    /// @brief Fetches server from the collection by tag.
+    ///
+    /// @return Pointer to the @c Server object or null if no such object
+    /// was found.
+    static ServerPtr get(const ServerCollection& collection,
+                         const data::ServerTag& server_tag);
+};
+
+} // end of namespace isc::db
+} // end of namespace isc
+
+#endif