109 lines
2.3 KiB
C++
109 lines
2.3 KiB
C++
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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 Library 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
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* Plugin.cpp
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* Base plugin class for ola
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* Copyright (C) 2005-2008 Simon Newton
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*/
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#include <string>
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#include "ola/Logging.h"
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#include "olad/Plugin.h"
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#include "olad/PluginAdaptor.h"
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#include "olad/Preferences.h"
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namespace ola {
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const char Plugin::ENABLED_KEY[] = "enabled";
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/*
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* Returns true if we should try to start this plugin
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*/
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bool Plugin::ShouldStart() {
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if (!LoadPreferences())
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return false;
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return !(m_preferences->GetValue(ENABLED_KEY) == "false");
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}
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/*
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* Start the plugin. Calls start_hook() which can be over-ridden by the
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* derrived classes.
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* @returns true if started sucessfully, false otherwise.
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*/
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bool Plugin::Start() {
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string enabled;
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if (m_enabled)
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return false;
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// setup prefs
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if (!LoadPreferences())
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return false;
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if (!StartHook()) {
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return false;
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}
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m_enabled = true;
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return true;
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}
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/*
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* Stop the plugin. Calls stop_hook which can be over-ridden by the
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* derrived classes.
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*
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* @returns true if stopped sucessfully, false otherwise.
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*/
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bool Plugin::Stop() {
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if (!m_enabled)
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return false;
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bool ret = StopHook();
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m_enabled = false;
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return ret;
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}
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/*
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* Load the preferences and set defaults
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*/
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bool Plugin::LoadPreferences() {
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if (m_preferences)
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return true;
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if (PluginPrefix() == "") {
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OLA_WARN << Name() << ", no prefix provided";
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return false;
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}
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m_preferences = m_plugin_adaptor->NewPreference(PluginPrefix());
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if (!m_preferences)
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return false;
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m_preferences->Load();
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if (!SetDefaultPreferences()) {
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OLA_INFO << Name() << ", SetDefaultPreferences failed";
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return false;
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}
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return true;
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}
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} // ola
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