icinga2/lib/base/component.cpp

145 lines
4.0 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, NULL);
/**
* 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."));
#ifdef _WIN32
HMODULE
#else /* _WIN32 */
lt_dlhandle
#endif /* _WIN32 */
hModule;
Logger::Write(LogInformation, "base", "Loading component '" + GetName() + "'");
hModule = Utility::LoadIcingaLibrary(GetName(), true);
CreateComponentFunction pCreateComponent;
#ifdef _WIN32
pCreateComponent = reinterpret_cast<CreateComponentFunction>(GetProcAddress(hModule,
"CreateComponent"));
#else /* _WIN32 */
# ifdef __GNUC__
/* suppress compiler warning for void * cast */
__extension__
# endif
pCreateComponent = reinterpret_cast<CreateComponentFunction>(lt_dlsym(hModule,
"CreateComponent"));
#endif /* _WIN32 */
IComponent::Ptr impl;
try {
if (pCreateComponent == NULL)
BOOST_THROW_EXCEPTION(runtime_error("Loadable module does not contain "
"CreateComponent function"));
/* pCreateComponent returns a raw pointer which we must wrap in a shared_ptr */
impl = IComponent::Ptr(pCreateComponent());
if (!impl)
BOOST_THROW_EXCEPTION(runtime_error("CreateComponent function returned NULL."));
} catch (...) {
#ifdef _WIN32
FreeLibrary(hModule);
#else /* _WIN32 */
lt_dlclose(hModule);
#endif /* _WIN32 */
throw;
}
m_Impl = impl;
}
/**
* 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->m_Config = 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();
}
/**
* 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. */
}