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+//
+// basic_logger.hpp
+// ~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2021 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#ifndef SERVICES_BASIC_LOGGER_HPP
+#define SERVICES_BASIC_LOGGER_HPP
+
+#include <asio.hpp>
+#include <boost/noncopyable.hpp>
+#include <string>
+
+namespace services {
+
+/// Class to provide simple logging functionality. Use the services::logger
+/// typedef.
+template <typename Service>
+class basic_logger
+ : private boost::noncopyable
+{
+public:
+ /// The type of the service that will be used to provide timer operations.
+ typedef Service service_type;
+
+ /// The native implementation type of the timer.
+ typedef typename service_type::impl_type impl_type;
+
+ /// Constructor.
+ /**
+ * This constructor creates a logger.
+ *
+ * @param context The execution context used to locate the logger service.
+ *
+ * @param identifier An identifier for this logger.
+ */
+ explicit basic_logger(asio::execution_context& context,
+ const std::string& identifier)
+ : service_(asio::use_service<Service>(context)),
+ impl_(service_.null())
+ {
+ service_.create(impl_, identifier);
+ }
+
+ /// Destructor.
+ ~basic_logger()
+ {
+ service_.destroy(impl_);
+ }
+
+ /// Set the output file for all logger instances.
+ void use_file(const std::string& file)
+ {
+ service_.use_file(impl_, file);
+ }
+
+ /// Log a message.
+ void log(const std::string& message)
+ {
+ service_.log(impl_, message);
+ }
+
+private:
+ /// The backend service implementation.
+ service_type& service_;
+
+ /// The underlying native implementation.
+ impl_type impl_;
+};
+
+} // namespace services
+
+#endif // SERVICES_BASIC_LOGGER_HPP