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// 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 CONFIG_BACKEND_DHCP6_MGR_H
#define CONFIG_BACKEND_DHCP6_MGR_H
#include <config_backend/base_config_backend_mgr.h>
#include <dhcpsrv/config_backend_pool_dhcp6.h>
#include <boost/scoped_ptr.hpp>
namespace isc {
namespace dhcp {
/// @brief Configuration Backend Manager for DHPCv6 servers.
///
/// Implements the "manager" class which holds information about the
/// supported and configured backends and provides access to those
/// backends. This is similar to @c HostMgr and @c LeaseMgr singletons
/// being used by the DHCP servers.
///
/// It is implemented as a singleton that can be accessed from any place
/// within the server code. This includes server configuration, data
/// fetching during normal server operation and data management, including
/// processing of control commands implemented within hooks libraries.
///
/// Unlike @c HostMgr, the it does not directly expose the API to fetch and
/// manipulate the data in the database. This is done via, the Configuration
/// Backend Pool, see @c ConfigBackendPoolDHCPv6 for details.
class ConfigBackendDHCPv6Mgr : public cb::BaseConfigBackendMgr<ConfigBackendPoolDHCPv6>,
public boost::noncopyable {
public:
/// @brief Creates new instance of the @c ConfigBackendDHCPv6Mgr.
///
/// If an instance of the @c ConfigBackendDHCPv6Mgr already exists,
/// it will be replaced by the new instance. Thus, all factories
/// will be unregistered and config databases will be dropped.
static void create();
/// @brief Destroys the instance of the @c ConfigBackendDHCPv6Mgr.
///
/// If an instance of the @c ConfigBackendDHCPv6Mgr exists,
/// it will be destroyed. Thus, all factories will be unregistered
/// and config databases will be dropped.
static void destroy();
/// @brief Returns a sole instance of the @c ConfigBackendDHCPv6Mgr.
///
/// This method should be used to retrieve an instance of the @c ConfigBackendDHCPv6Mgr
/// to be used to gather/manage config backends. It returns an instance
/// of the @c ConfigBackendDHCPv6Mgr created by the @c create method. If
/// the instance doesn't exist yet, it is created using the @c create method
/// with the an empty set of configuration databases.
static ConfigBackendDHCPv6Mgr& instance();
private:
/// @brief Private default constructor.
ConfigBackendDHCPv6Mgr() {}
/// @brief Returns a pointer to the currently used instance of the
/// @c ConfigBackendDHCPv6Mgr.
static boost::scoped_ptr<ConfigBackendDHCPv6Mgr>& getConfigBackendDHCPv6MgrPtr();
};
} // end of namespace isc::dhcp
} // end of namespace isc
#endif // CONFIG_BACKEND_DHCP6_MGR_H
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