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#ifndef _broker_Daemon_h
#define _broker_Daemon_h
/*
*
* Copyright (c) 2006 The Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#include <string>
#include <boost/scoped_ptr.hpp>
namespace qpid {
namespace broker {
/**
* Tools for forking and managing a daemon process.
* NB: Only one Daemon instance is allowed in a process.
*/
class Daemon
{
public:
/** Extract the daemon's name from argv[0] */
static std::string nameFromArgv0(const char* argv0);
/**
* Creating a Daemon instance forks a daemon process.
*@param name used to create pid files etc.
*@param timeout in seconds for all operations that wait.
*/
Daemon(const std::string& name, int timeout);
~Daemon();
/** Fork the daemon, wait till it signals readiness */
pid_t fork();
/** Child only, send ready signal so parent fork() will return. */
void ready();
/** Child only, send failed signal so parent fork() will throw. */
void failed();
/** Kill the daemon with SIGINT. */
void quit();
/** Kill the daemon with SIGKILL. */
void kill();
/** Check daemon is running, throw exception if not */
pid_t check();
bool isParent() { return pid > 0; }
bool isChild() { return pid == 0; }
std::string getName() const { return name; }
pid_t getPid() const {return pid; }
private:
class Retval;
void notify(int);
static std::string name;
static std::string pidFile;
static const char* getPidFile();
boost::scoped_ptr<Retval> retval;
pid_t pid;
int timeout;
};
}} // namespace qpid::broker
#endif /*!_broker_Daemon_h*/
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