libt2n: (gerd) add example for wrapper

[libt2n] / test / reentrant.cpp

/***************************************************************************
 *   Copyright (C) 2004 by Intra2net AG                                    *
 *   info@intra2net.com                                                    *
 *                                                                         *
 ***************************************************************************/

#include <sys/types.h>
#include <unistd.h>
#include <errno.h>
#include <signal.h>
#include <stdio.h>

#include <iostream>
#include <string>
#include <sstream>
#include <stdexcept>

#include <cppunit/extensions/TestFactoryRegistry.h>
#include <cppunit/ui/text/TestRunner.h>
#include <cppunit/extensions/HelperMacros.h>

#include <boost/archive/binary_oarchive.hpp>
#include <boost/archive/binary_iarchive.hpp>
#include <boost/archive/xml_oarchive.hpp>
#include <boost/archive/xml_iarchive.hpp>
#include <boost/serialization/serialization.hpp>

#include <container.hxx>
#include <socket_client.hxx>
#include <socket_server.hxx>
#include <command_client.hxx>
#include <command_server.hxx>

using namespace std;
using namespace CppUnit;
using namespace libt2n;

namespace
{

command_server *global_server;

string testfunc(const string& str)
{
    string ret;
    ret=str+", testfunc() was here";

    // call handle, eventually reentrant
    global_server->handle(1000);

    return ret;
}

class testfunc_res : public libt2n::result
{
    private:
        string res;

        friend class boost::serialization::access;
        template<class Archive>
        void serialize(Archive & ar, const unsigned int version)
        {
            ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(libt2n::result);
            ar & BOOST_SERIALIZATION_NVP(res);
        }

    public:
        testfunc_res()
            { }

        testfunc_res(const string& str)
        {
            res=str;
        }

        string get_data()
        {
            return res;
        }
};


class testfunc_cmd : public libt2n::command
{
    private:
        string param;

        friend class boost::serialization::access;
        template<class Archive>
        void serialize(Archive & ar, const unsigned int version)
        {
            ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(libt2n::command);
            ar & BOOST_SERIALIZATION_NVP(param);
        }

    public:
        testfunc_cmd()
            { }

        testfunc_cmd(const string& str)
        {
            param=str;
        }

        libt2n::result* operator()()
        {
            return new testfunc_res(testfunc(param));
        }
};

}

#include <boost/serialization/export.hpp>

BOOST_CLASS_EXPORT(testfunc_cmd)
BOOST_CLASS_EXPORT(testfunc_res)

class test_reentrant : public TestFixture
{
    CPPUNIT_TEST_SUITE(test_reentrant);

    CPPUNIT_TEST(ReentrantServer);

    CPPUNIT_TEST_SUITE_END();

    pid_t child_pid;

    public:

    void setUp()
    { }

    void tearDown()
    { }

    void ReentrantServer()
    {
        switch(child_pid=fork())
        {
            case -1:
            {
                CPPUNIT_FAIL("fork error");
                break;
            }
            case 0:
            // child
            {
                // wait till server is up
                sleep(1);

                // we want 8 identical childs hammering the server
                fork();
                fork();
                fork();

                for (int i=0; i < 100; i++)
                {
                    socket_client_connection sc("./socket");
                    command_client cc(&sc);

                    result_container rc;
                    cc.send_command(new testfunc_cmd("hello"),rc);

                    string ret=dynamic_cast<testfunc_res*>(rc.get_result())->get_data();

                    CPPUNIT_ASSERT_EQUAL(string("hello, testfunc() was here"),ret);
                }

                // don't call atexit and stuff
                _exit(0);
            }

            default:
            // parent
            {
                socket_server ss("./socket");
                command_server cs(ss);

                global_server=&cs;

                // max 10 sec
                long long maxtime=5000000;
                while(maxtime > 0)
                    cs.handle(maxtime,&maxtime);
            }

            // we are still alive, everything is ok
            CPPUNIT_ASSERT_EQUAL(1,1);
        }
    }

};


CPPUNIT_TEST_SUITE_REGISTRATION(test_reentrant);