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/*
* Phusion Passenger - http://www.modrails.com/
* Copyright (c) 2008, 2009 Phusion
*
* "Phusion Passenger" is a trademark of Hongli Lai & Ninh Bui.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* 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 AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#ifndef _PASSENGER_DUMMY_SPAWN_MANAGER_H_
#define _PASSENGER_DUMMY_SPAWN_MANAGER_H_
// TODO: make this path not hardcoded
#define DUMMY_REQUEST_HANDLER_EXECUTABLE "/home/hongli/Projects/passenger/benchmark/DummyRequestHandler"
#include <string>
#include <sys/types.h>
#include <sys/wait.h>
#include <cstdio>
#include <unistd.h>
#include <errno.h>
#include "Application.h"
#include "Exceptions.h"
namespace Passenger {
using namespace std;
/**
* A dummy SpawnManager replacement for testing/debugging purposes.
*
* This class implements a dummy spawn manager, and is 100% interface-compatible with
* SpawnManager. This spawn manager will spawn <tt>benchmark/DummyRequestHandler</tt>,
* which is probably the fastest possible implementation of a request handler. The purpose
* of this class to benchmark the performance of the Apache module (i.e. not benchmarking
* the Ruby request handler or Rails itself).
*
* This header file is not used by default. Define the macro <tt>PASSENGER_USE_DUMMY_SPAWN_MANAGER</tt>
* to make ApplicationPool use DummySpawnManager instead of SpawnManager.
*
* Of course, don't forget to compile benchmark/DummyRequestHandler!
*
* @ingroup Support
*/
class DummySpawnManager {
public:
ApplicationPtr spawn(const string &appRoot, const string &user = "", const string &group = "") {
int fds[2];
pid_t pid;
if(socketpair(AF_UNIX, SOCK_STREAM, 0, fds) == -1) {
throw SystemException("Cannot create a Unix socket", errno);
}
pid = fork();
if (pid == 0) {
pid = fork();
if (pid == 0) {
dup2(fds[0], STDIN_FILENO);
close(fds[0]);
close(fds[1]);
execlp(DUMMY_REQUEST_HANDLER_EXECUTABLE, DUMMY_REQUEST_HANDLER_EXECUTABLE, NULL);
int e = errno;
fprintf(stderr, "Unable to run %s: %s\n", DUMMY_REQUEST_HANDLER_EXECUTABLE, strerror(e));
fflush(stderr);
_exit(1);
} else if (pid == -1) {
perror("Cannot fork a new process");
fflush(stderr);
_exit(1);
} else {
_exit(0);
}
} else if (pid == -1) {
close(fds[0]);
close(fds[1]);
throw SystemException("Cannot fork a new process", errno);
} else {
close(fds[0]);
waitpid(pid, NULL, 0);
return ApplicationPtr(new Application(appRoot, pid, fds[1]));
}
}
pid_t getServerPid() const {
return 0;
}
};
} // namespace Passenger
#endif /* _PASSENGER_DUMMY_SPAWN_MANAGER_H_ */
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