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boostasio_nonowner_iocontext.cpp
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145 lines (134 loc) · 4.96 KB
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/*******************************************************************************
* CLI - A simple command line interface.
* Copyright (C) 2016-2021 Daniele Pallastrelli
*
* Boost Software License - Version 1.0 - August 17th, 2003
*
* Permission is hereby granted, free of charge, to any person or organization
* obtaining a copy of the software and accompanying documentation covered by
* this license (the "Software") to use, reproduce, display, distribute,
* execute, and transmit the Software, and to prepare derivative works of the
* Software, and to permit third-parties to whom the Software is furnished to
* do so, all subject to the following:
*
* The copyright notices in the Software and this entire statement, including
* the above license grant, this restriction and the following disclaimer,
* must be included in all copies of the Software, in whole or in part, and
* all derivative works of the Software, unless such copies or derivative
* works are solely in the form of machine-executable object code generated by
* a source language processor.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
* SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
* FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
******************************************************************************/
// TODO: NB boostasioscheduler.h includes boost asio
// so in Windows it should appear before cli.h and clilocalsession.h that include rang,
// because both include WinSock.h
// (consider to provide a global header file for the library)
#include <cli/boostasioscheduler.h>
#include <cli/cli.h>
#include <cli/clilocalsession.h>
using namespace cli;
using namespace std;
#if BOOST_VERSION < 106600
using IoContext = boost::asio::io_service;
#else
using IoContext = boost::asio::io_context;
#endif
class UserInterface
{
public:
UserInterface(IoContext& iocontext) : scheduler(iocontext)
{
auto rootMenu = make_unique< Menu >("cli");
rootMenu->Insert(
"hello",
[](std::ostream& out){ out << "Hello, world\n"; },
"Print hello world" );
colorCmd = rootMenu->Insert(
"color",
[&](std::ostream& out)
{
out << "Colors ON\n";
SetColor();
colorCmd.Disable();
nocolorCmd.Enable();
},
"Enable colors in the cli" );
nocolorCmd = rootMenu->Insert(
"nocolor",
[&](std::ostream& out)
{
out << "Colors OFF\n";
SetNoColor();
colorCmd.Enable();
nocolorCmd.Disable();
},
"Disable colors in the cli" );
cli = make_unique<Cli>(std::move(rootMenu));
// global exit action
cli->ExitAction( [](auto& out){ out << "Goodbye and thanks for all the fish.\n"; } );
// std exception custom handler
cli->StdExceptionHandler(
[](std::ostream& out, const std::string& cmd, const std::exception& e)
{
out << "Exception caught in cli handler: "
<< e.what()
<< " handling command: "
<< cmd
<< ".\n";
}
);
localSession = make_unique<CliLocalTerminalSession>(*cli, scheduler, std::cout, 200);
localSession->ExitAction(
[this](auto& out) // session exit action
{
out << "Closing App...\n";
scheduler.Stop();
}
);
}
private:
BoostAsioScheduler scheduler;
unique_ptr<Cli> cli;
unique_ptr<CliLocalTerminalSession> localSession;
CmdHandler colorCmd;
CmdHandler nocolorCmd;
};
int main()
{
try
{
// main application that creates an asio io_context and uses it
IoContext iocontext;
boost::asio::deadline_timer timer(
iocontext,
boost::posix_time::seconds(5)
);
timer.async_wait([](const boost::system::error_code&){ cout << "Timer expired!\n"; });
// cli setup
UserInterface interface(iocontext);
// start the asio io_context
#if BOOST_VERSION < 106600
boost::asio::io_service::work work(iocontext);
#else
auto work = boost::asio::make_work_guard(iocontext);
#endif
iocontext.run();
return 0;
}
catch (const std::exception& e)
{
cerr << "Exception caugth in main: " << e.what() << endl;
}
catch (...)
{
cerr << "Unknown exception caugth in main." << endl;
}
return -1;
}