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// mongo/shell/shell_utils_launcher.h
/*
* Copyright 2010 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects
* for all of the code used other than as permitted herein. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you do not
* wish to do so, delete this exception statement from your version. If you
* delete this exception statement from all source files in the program,
* then also delete it in the license file.
*/
#pragma once
#include <boost/filesystem/convenience.hpp>
#include <map>
#include <sstream>
#include <string>
#include <vector>
#include <utility>
#include "mongo/bson/bsonobj.h"
#include "mongo/platform/process_id.h"
#include "mongo/platform/unordered_map.h"
#include "mongo/stdx/mutex.h"
namespace mongo {
class Scope;
namespace shell_utils {
// Scoped management of mongo program instances. Simple implementation:
// destructor kills all mongod instances created by the shell.
struct MongoProgramScope {
MongoProgramScope() {} // Avoid 'unused variable' warning.
~MongoProgramScope();
};
void KillMongoProgramInstances();
void installShellUtilsLauncher(Scope& scope);
/** Record log lines from concurrent programs. All public members are thread safe. */
class ProgramOutputMultiplexer {
public:
void appendLine(int port, ProcessId pid, const char* line);
/** @return up to 100000 characters of the most recent log output. */
std::string str() const;
void clear();
private:
std::stringstream _buffer;
};
/**
* A registry of spawned programs that are identified by a bound port or else a system pid.
* All public member functions are thread safe.
*/
class ProgramRegistry {
public:
bool isPortRegistered(int port) const;
/** @return pid for a registered port. */
ProcessId pidForPort(int port) const;
/** @return port (-1 if doesn't exist) for a registered pid. */
int portForPid(ProcessId pid) const;
/** @return name for a registered program */
std::string programName(ProcessId pid) const;
/** Register an unregistered program. */
void registerProgram(ProcessId pid, int output, int port = 0, std::string name = "sh");
void deleteProgram(ProcessId pid);
bool isPidRegistered(ProcessId pid) const;
void getRegisteredPorts(std::vector<int>& ports);
void getRegisteredPids(std::vector<ProcessId>& pids);
private:
std::unordered_map<int, ProcessId> _portToPidMap;
std::unordered_map<ProcessId, int> _outputs;
std::unordered_map<ProcessId, std::string> _programNames;
mutable stdx::recursive_mutex _mutex;
#ifdef _WIN32
private:
std::map<ProcessId, HANDLE> _handles;
public:
HANDLE getHandleForPid(ProcessId pid);
void eraseHandleForPid(ProcessId pid);
std::size_t countHandleForPid(ProcessId pid);
void insertHandleForPid(ProcessId pid, HANDLE handle);
#endif
};
/** Helper class for launching a program and logging its output. */
class ProgramRunner {
public:
/** @param args The program's arguments, including the program name.
* @param env Environment to run the program with, which will override any set by the local
* environment */
ProgramRunner(const BSONObj& args, const BSONObj& env);
/** Launch the program. */
void start();
/** Continuously read the program's output, generally from a special purpose thread. */
void operator()();
ProcessId pid() const {
return _pid;
}
int port() const {
return _port;
}
private:
boost::filesystem::path findProgram(const std::string& prog);
void launchProcess(int child_stdout);
std::vector<std::string> _argv;
std::map<std::string, std::string> _envp;
int _port;
int _pipe;
ProcessId _pid;
std::string _name;
};
}
}
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