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+// Copyright (C) 2017 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 HOOKS_CONFIG_H
+#define HOOKS_CONFIG_H
+
+#include <exceptions/exceptions.h>
+#include <cc/data.h>
+#include <cc/cfg_to_element.h>
+#include <hooks/libinfo.h>
+
+namespace isc {
+namespace hooks {
+
+/// @brief Exception thrown when a library failed to validate
+class InvalidHooksLibraries : public Exception {
+ public:
+ InvalidHooksLibraries(const char* file, size_t line, const char* what) :
+ isc::Exception(file, line, what) { };
+};
+
+/// @brief Wrapper class that holds hooks libraries configuration
+///
+/// This was moved from HooksLibrariesParser
+///
+/// However, this class does more than just check the list of library names.
+/// It does two other things:
+/// # validate libraries
+/// # load libraries
+/// and it provides a toElement() method to unparse a configuration.
+///
+/// @todo add toElement() unit tests
+class HooksConfig : public isc::data::CfgToElement {
+public:
+ /// @brief Default constructor.
+ ///
+ HooksConfig() : libraries_() { }
+
+ /// @brief Adds additional hooks libraries.
+ ///
+ /// @param libname full filename with path to the library.
+ /// @param parameters map of parameters that configure the library.
+ void add(std::string libname, isc::data::ConstElementPtr parameters) {
+ libraries_.push_back(make_pair(libname, parameters));
+ }
+
+ /// @brief Provides access to the configured hooks libraries.
+ ///
+ /// @note The const reference returned is only valid as long as the
+ /// object that returned it.
+ const isc::hooks::HookLibsCollection& get() const {
+ return libraries_;
+ }
+
+ /// @brief Removes all configured hooks libraries.
+ void clear() {
+ libraries_.clear();
+ }
+
+ /// @brief Compares two Hooks Config classes for equality
+ ///
+ /// @param other other hooksconfig to compare with
+ bool equal(const HooksConfig& other) const;
+
+ /// @brief Verifies that libraries stored in libraries_ are valid.
+ ///
+ /// This method is a smart wrapper around @ref
+ /// isc::hooks::HooksManager::validateLibraries().
+ /// It tries to validate all the libraries stored in libraries_.
+ ///
+ /// @param position position of the hooks-library map for error reporting
+ /// @throw InvalidHooksLibraries if any issue is discovered.
+ void verifyLibraries(const isc::data::Element::Position& position) const;
+
+ /// @brief Commits hooks libraries configuration.
+ ///
+ /// This method calls necessary methods in HooksManager that will unload
+ /// any libraries that may be currently loaded and will load the actual
+ /// libraries. Providing that the specified libraries are valid and are
+ /// different to those already loaded, this method loads the new set of
+ /// libraries (and unloads the existing set).
+ ///
+ /// @throw InvalidHooksLibraries if the call to HooksManager fails.
+ void loadLibraries() const;
+
+ /// @brief Unparse a configuration object
+ ///
+ /// Returns an element which must parse into the same object, i.e.
+ /// @code
+ /// for all valid config C parse(parse(C)->toElement()) == parse(C)
+ /// @endcode
+ ///
+ /// @return a pointer to a configuration which can be parsed into
+ /// the initial configuration object
+ isc::data::ElementPtr toElement() const;
+
+private:
+ /// @brief List of hooks libraries with their configuration parameters
+ isc::hooks::HookLibsCollection libraries_;
+};
+
+};
+};
+
+#endif // HOOKS_CONFIG_H