icinga2/lib/base/component.cpp

141 lines
3.7 KiB
C++

/******************************************************************************
* Icinga 2 *
* Copyright (C) 2012 Icinga Development Team (http://www.icinga.org/) *
* *
* This program is free software; you can redistribute it and/or *
* modify it under the terms of the GNU General Public License *
* as published by the Free Software Foundation; either version 2 *
* of the License, or (at your option) any later version. *
* *
* 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 General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the Free Software Foundation *
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
******************************************************************************/
#include "i2-base.h"
using namespace icinga;
REGISTER_TYPE(Component);
boost::mutex Component::m_Mutex;
map<String, Component::Factory> Component::m_Factories;
/**
* Constructor for the component class.
*/
Component::Component(const Dictionary::Ptr& properties)
: DynamicObject(properties)
{
if (!IsLocal())
BOOST_THROW_EXCEPTION(runtime_error("Component objects must be local."));
Logger::Write(LogInformation, "base", "Loading component '" + GetName() + "'");
(void) Utility::LoadIcingaLibrary(GetName(), true);
Component::Factory factory;
{
boost::mutex::scoped_lock lock(m_Mutex);
map<String, Factory>::iterator it;
it = m_Factories.find(GetName());
if (it == m_Factories.end())
BOOST_THROW_EXCEPTION(invalid_argument("Unknown component: " + GetName()));
factory = it->second;
}
m_Impl = factory();
if (!m_Impl)
BOOST_THROW_EXCEPTION(runtime_error("Component factory returned NULL."));
}
/**
* Destructor for the Component class.
*/
Component::~Component(void)
{
if (m_Impl)
m_Impl->Stop();
}
/**
* Starts the component. Called when the DynamicObject is fully
* constructed/registered.
*/
void Component::Start(void)
{
m_Impl->SetConfig(GetSelf());
m_Impl->Start();
}
/**
* Adds a directory to the component search path.
*
* @param componentDirectory The directory.
*/
void Component::AddSearchDir(const String& componentDirectory)
{
Logger::Write(LogInformation, "base", "Adding library search dir: " +
componentDirectory);
#ifdef _WIN32
SetDllDirectory(componentDirectory.CStr());
#else /* _WIN32 */
lt_dladdsearchdir(componentDirectory.CStr());
#endif /* _WIN32 */
}
/**
* Retrieves the configuration for this component.
*
* @returns The configuration.
*/
DynamicObject::Ptr IComponent::GetConfig(void) const
{
return m_Config.lock();
}
/**
* Sets the configuration for this component.
*/
void IComponent::SetConfig(const DynamicObject::Ptr& config)
{
m_Config = config;
}
/**
* Starts the component.
*/
void IComponent::Start(void)
{
/* Nothing to do in the default implementation. */
}
/**
* Stops the component.
*/
void IComponent::Stop(void)
{
/* Nothing to do in the default implementation. */
}
/**
* Registers a component factory.
*/
void Component::Register(const String& name, const Component::Factory& factory)
{
boost::mutex::scoped_lock lock(m_Mutex);
m_Factories[name] = factory;
}