paulwerelds@224: /*
paulwerelds@224:  
moel@344:   This Source Code Form is subject to the terms of the Mozilla Public
moel@344:   License, v. 2.0. If a copy of the MPL was not distributed with this
moel@344:   file, You can obtain one at http://mozilla.org/MPL/2.0/.
paulwerelds@224:  
moel@344:   Copyright (C) 2009-2010 Paul Werelds <paul@werelds.net>
moel@390: 	Copyright (C) 2012 Michael Möller <mmoeller@openhardwaremonitor.org>
moel@390: 
paulwerelds@224: */
paulwerelds@224: 
paulwerelds@223: using System;
paulwerelds@223: using System.Collections.Generic;
paulwerelds@223: using System.Management.Instrumentation;
paulwerelds@223: using OpenHardwareMonitor.Hardware;
paulwerelds@223: 
paulwerelds@223: [assembly: Instrumented("root/OpenHardwareMonitor")]
paulwerelds@223: 
paulwerelds@223: [System.ComponentModel.RunInstaller(true)]
paulwerelds@223: public class InstanceInstaller : DefaultManagementProjectInstaller { }
paulwerelds@223: 
paulwerelds@227: namespace OpenHardwareMonitor.WMI {
paulwerelds@224:   /// <summary>
paulwerelds@224:   /// The WMI Provider.
paulwerelds@224:   /// This class is not exposed to WMI itself.
paulwerelds@224:   /// </summary>
paulwerelds@223:   public class WmiProvider : IDisposable {
paulwerelds@225:     private List<IWmiObject> activeInstances;
paulwerelds@223: 
paulwerelds@223:     public WmiProvider(IComputer computer) {
paulwerelds@225:       activeInstances = new List<IWmiObject>();
paulwerelds@223: 
paulwerelds@223:       foreach (IHardware hardware in computer.Hardware)
paulwerelds@223:         ComputerHardwareAdded(hardware);
paulwerelds@223: 
paulwerelds@223:       computer.HardwareAdded += ComputerHardwareAdded;
paulwerelds@223:       computer.HardwareRemoved += ComputerHardwareRemoved;
paulwerelds@223:     }
paulwerelds@223: 
paulwerelds@223:     public void Update() {
paulwerelds@225:       foreach (IWmiObject instance in activeInstances)
paulwerelds@223:         instance.Update();
paulwerelds@223:     }
paulwerelds@223: 
paulwerelds@223:     #region Eventhandlers
paulwerelds@223:     
paulwerelds@223:     private void ComputerHardwareAdded(IHardware hardware) {
paulwerelds@223:       if (!Exists(hardware.Identifier.ToString())) {
paulwerelds@223:         foreach (ISensor sensor in hardware.Sensors)
paulwerelds@223:           HardwareSensorAdded(sensor);
paulwerelds@223: 
paulwerelds@223:         hardware.SensorAdded += HardwareSensorAdded;
paulwerelds@223:         hardware.SensorRemoved += HardwareSensorRemoved;
paulwerelds@223: 
paulwerelds@223:         Hardware hw = new Hardware(hardware);
paulwerelds@225:         activeInstances.Add(hw);
paulwerelds@223: 
moel@240:         try {
moel@240:           Instrumentation.Publish(hw);
moel@240:         } catch (Exception) { }
paulwerelds@223:       }
paulwerelds@223: 
paulwerelds@223:       foreach (IHardware subHardware in hardware.SubHardware)
paulwerelds@223:         ComputerHardwareAdded(subHardware);
paulwerelds@223:     }
paulwerelds@223: 
paulwerelds@223:     private void HardwareSensorAdded(ISensor data) {
paulwerelds@223:       Sensor sensor = new Sensor(data);
paulwerelds@225:       activeInstances.Add(sensor);
paulwerelds@223: 
moel@240:       try {
moel@240:         Instrumentation.Publish(sensor);
moel@240:       } catch (Exception) { }
paulwerelds@223:     }
paulwerelds@223: 
paulwerelds@223:     private void ComputerHardwareRemoved(IHardware hardware) {
paulwerelds@223:       hardware.SensorAdded -= HardwareSensorAdded;
paulwerelds@223:       hardware.SensorRemoved -= HardwareSensorRemoved;
paulwerelds@223:       
paulwerelds@223:       foreach (ISensor sensor in hardware.Sensors) 
paulwerelds@223:         HardwareSensorRemoved(sensor);
paulwerelds@223:       
paulwerelds@223:       foreach (IHardware subHardware in hardware.SubHardware)
paulwerelds@223:         ComputerHardwareRemoved(subHardware);
paulwerelds@223: 
paulwerelds@223:       RevokeInstance(hardware.Identifier.ToString());
paulwerelds@223:     }
paulwerelds@223: 
paulwerelds@223:     private void HardwareSensorRemoved(ISensor sensor) {
paulwerelds@223:       RevokeInstance(sensor.Identifier.ToString());
paulwerelds@223:     }
paulwerelds@223: 
paulwerelds@223:     #endregion
paulwerelds@223: 
paulwerelds@223:     #region Helpers
paulwerelds@223:     
paulwerelds@223:     private bool Exists(string identifier) {
paulwerelds@225:       return activeInstances.Exists(h => h.Identifier == identifier);
paulwerelds@223:     }
paulwerelds@223: 
paulwerelds@223:     private void RevokeInstance(string identifier) {
paulwerelds@225:       int instanceIndex = activeInstances.FindIndex(
paulwerelds@223:         item => item.Identifier == identifier.ToString()
paulwerelds@223:       );
paulwerelds@223: 
moel@390:       if (instanceIndex == -1)
moel@390:         return;
moel@390: 
moel@240:       try {
moel@240:         Instrumentation.Revoke(activeInstances[instanceIndex]);
moel@240:       } catch (Exception) { }
paulwerelds@223: 
paulwerelds@225:       activeInstances.RemoveAt(instanceIndex);
paulwerelds@223:     }
paulwerelds@223: 
paulwerelds@223:     #endregion
paulwerelds@223: 
paulwerelds@223:     public void Dispose() {
moel@240:       foreach (IWmiObject instance in activeInstances) {
moel@240:         try {
moel@240:           Instrumentation.Revoke(instance);
moel@240:         } catch (Exception) { }
moel@240:       }
paulwerelds@225:       activeInstances = null;
paulwerelds@223:     }
paulwerelds@223:   }
paulwerelds@223: }