mirror of https://github.com/Icinga/icinga2.git
159 lines
4.3 KiB
C++
159 lines
4.3 KiB
C++
/******************************************************************************
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* Icinga 2 *
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* Copyright (C) 2012 Icinga Development Team (http://www.icinga.org/) *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU General Public License *
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* as published by the Free Software Foundation; either version 2 *
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* of the License, or (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the Free Software Foundation *
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
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******************************************************************************/
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#include "i2-base.h"
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using namespace icinga;
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REGISTER_CLASS(Component);
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/**
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* Constructor for the component class.
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*/
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Component::Component(const Dictionary::Ptr& properties)
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: DynamicObject(properties)
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{
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assert(Application::IsMainThread());
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if (!IsLocal())
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throw_exception(runtime_error("Component objects must be local."));
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string path;
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#ifdef _WIN32
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path = GetName() + ".dll";
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#else /* _WIN32 */
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path = GetName() + ".la";
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#endif /* _WIN32 */
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Logger::Write(LogInformation, "base", "Loading component '" + GetName() + "' (using library '" + path + "')");
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#ifdef _WIN32
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HMODULE hModule = LoadLibrary(path.c_str());
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if (hModule == NULL)
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throw_exception(Win32Exception("LoadLibrary('" + path + "') failed", GetLastError()));
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#else /* _WIN32 */
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lt_dlhandle hModule = lt_dlopen(path.c_str());
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if (hModule == NULL) {
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throw_exception(runtime_error("Could not load module '" + path + "': " + lt_dlerror()));
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}
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#endif /* _WIN32 */
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CreateComponentFunction pCreateComponent;
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#ifdef _WIN32
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pCreateComponent = (CreateComponentFunction)GetProcAddress(hModule,
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"CreateComponent");
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#else /* _WIN32 */
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# ifdef __GNUC__
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/* suppress compiler warning for void * cast */
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__extension__
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# endif
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pCreateComponent = (CreateComponentFunction)lt_dlsym(hModule,
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"CreateComponent");
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#endif /* _WIN32 */
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IComponent::Ptr impl;
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try {
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if (pCreateComponent == NULL)
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throw_exception(runtime_error("Loadable module does not contain "
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"CreateComponent function"));
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/* pCreateComponent returns a raw pointer which we must wrap in a shared_ptr */
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impl = IComponent::Ptr(pCreateComponent());
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if (!impl)
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throw_exception(runtime_error("CreateComponent function returned NULL."));
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} catch (...) {
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#ifdef _WIN32
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FreeLibrary(hModule);
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#else /* _WIN32 */
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lt_dlclose(hModule);
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#endif /* _WIN32 */
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throw;
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}
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impl->m_Config = this;
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SetImplementation(impl);
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impl->Start();
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}
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Component::~Component(void)
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{
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IComponent::Ptr impl = GetImplementation();
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if (impl)
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impl->Stop();
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}
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IComponent::Ptr Component::GetImplementation(void) const
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{
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IComponent::Ptr impl;
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GetTag("impl", &impl);
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return impl;
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}
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void Component::SetImplementation(const IComponent::Ptr& impl)
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{
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SetTag("impl", impl);
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}
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/**
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* Adds a directory to the component search path.
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*
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* @param componentDirectory The directory.
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*/
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void Component::AddSearchDir(const string& componentDirectory)
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{
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#ifdef _WIN32
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SetDllDirectory(componentDirectory.c_str());
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#else /* _WIN32 */
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lt_dladdsearchdir(componentDirectory.c_str());
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#endif /* _WIN32 */
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}
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/**
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* Retrieves the configuration for this component.
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*
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* @returns The configuration.
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*/
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DynamicObject::Ptr IComponent::GetConfig(void) const
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{
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return m_Config->GetSelf();
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}
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/**
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* Starts the component.
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*/
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void IComponent::Start(void)
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{
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/* Nothing to do in the default implementation. */
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}
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/**
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* Stops the component.
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*/
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void IComponent::Stop(void)
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{
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/* Nothing to do in the default implementation. */
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}
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