/// <summary>
/// Occurs when the engine's background thread runs
/// </summary>
/// <param name="sender"></param>
/// <param name="ea"></param>
protected virtual void OnThreadRun(object sender, BackgroundThreadStartEventArgs threadStartEventArgs)
{
bool downloaded = false;
bool installed = false;
bool finalized = false;
AutoUpdateDownloadDescriptor recommendedUpdateDescriptor = null;
try
{
/*
* Raise the AutoUpdateProcessStarted event
* */
AutoUpdateManagerEventArgs startedArgs = new AutoUpdateManagerEventArgs(this, null);
this.OnAutoUpdateProcessStarted(this, startedArgs);
#region Step 1. QueryForLatestVersion
/*
* Raise the BeforeQueryForLatestVersion event
* */
AutoUpdateManagerCancelEventArgs beforeQueryArgs = new AutoUpdateManagerCancelEventArgs(this, startedArgs.ProgressViewer, false);
this.OnBeforeQueryForLatestVersion(this, beforeQueryArgs);
// create an array list to hold all of the available updates
ArrayList listOfAvailableDownloads = new ArrayList();
// use the downloaders to check for downloads
foreach(AutoUpdateDownloader downloader in _downloaders)
{
try
{
// query the latest update available for the specified product
AutoUpdateDownloadDescriptor updateAvailable;
// if the downloader finds an update is available
if (downloader.QueryLatestVersion(beforeQueryArgs.ProgressViewer, _options, _productToUpdate, out updateAvailable))
// add it to the list of downloads available
listOfAvailableDownloads.Add(updateAvailable);
}
catch(ThreadAbortException ex)
{
throw new Exception(ex.Message, ex);
}
catch(Exception ex)
{
Debug.WriteLine(ex);
}
}
// create a simple array of the updates that are available for download
AutoUpdateDownloadDescriptor[] availableDownloads = listOfAvailableDownloads.ToArray(typeof(AutoUpdateDownloadDescriptor)) as AutoUpdateDownloadDescriptor[];
// sort and select the download that contains the newest version
recommendedUpdateDescriptor = this.SelectTheDownloadWithTheNewestUpdate(availableDownloads);
/*
* Raise the AfterQueryForLatestVersion event
* */
AutoUpdateManagerWithDownloadDescriptorEventArgs afterQueryArgs = new AutoUpdateManagerWithDownloadDescriptorEventArgs(this, beforeQueryArgs.ProgressViewer, recommendedUpdateDescriptor);
this.OnAfterQueryForLatestVersion(this, afterQueryArgs);
// if the manager could not find a suitable recomendation for downloading, we're done
if (recommendedUpdateDescriptor == null)
{
/*
* Raise the NoLaterVersionAvailable event
* */
this.OnNoLaterVersionAvailable(this, new AutoUpdateManagerEventArgs(this, afterQueryArgs.ProgressViewer));
return;
}
// or if the product to update is newer or equal to the version of the recommended update picked for downloading
if (_productToUpdate.Version >= recommendedUpdateDescriptor.Manifest.Product.Version)
{
/*
* Raise the NoLaterVersionAvailable event
* */
this.OnNoLaterVersionAvailable(this, new AutoUpdateManagerEventArgs(this, afterQueryArgs.ProgressViewer));
return;
}
#endregion
#region Step 2. Download
/*
* Create the path including the filename where the .Update file will be downloaded to locally
* (ex: "C:\Program Files\Razor\1.0.0.0.update")
* */
recommendedUpdateDescriptor.DownloadedPath = Path.Combine(_options.DownloadPath, Path.GetFileName(recommendedUpdateDescriptor.Manifest.UrlOfUpdate));
/*
* Raise the BeforeDownload event
* */
AutoUpdateManagerWithDownloadDescriptorCancelEventArgs beforeDownloadArgs = new AutoUpdateManagerWithDownloadDescriptorCancelEventArgs(this, afterQueryArgs.ProgressViewer, recommendedUpdateDescriptor, false);
this.OnBeforeDownload(this, beforeDownloadArgs);
// bail if the download was cancelled
if (beforeDownloadArgs.Cancel)
return;
// use the downloader that found the update to download it
// the update may be available via some proprietary communications channel (http, ftp, or Unc paths)
downloaded = recommendedUpdateDescriptor.Downloader.Download(beforeDownloadArgs.ProgressViewer, recommendedUpdateDescriptor);
/*
* Raise the AfterDownload event
* */
AutoUpdateManagerWithDownloadDescriptorEventArgs afterDownloadArgs = new AutoUpdateManagerWithDownloadDescriptorEventArgs(this, beforeDownloadArgs.ProgressViewer, recommendedUpdateDescriptor);
afterDownloadArgs.OperationStatus = downloaded;
this.OnAfterDownload(this, afterDownloadArgs);
// if the download failed bail out
if (!downloaded)
return;
#endregion
#region Step 3. Install
/*
* Raise the BeforeInstall event
* */
AutoUpdateManagerWithDownloadDescriptorCancelEventArgs beforeInstallArgs = new AutoUpdateManagerWithDownloadDescriptorCancelEventArgs(this, afterDownloadArgs.ProgressViewer, recommendedUpdateDescriptor, false);
this.OnBeforeInstall(this, beforeInstallArgs);
// if the installation was not cancelled
if (!beforeInstallArgs.Cancel)
{
// install the update
installed = this.InstallUpdate(beforeInstallArgs.ProgressViewer, recommendedUpdateDescriptor);
// if the update was installed, now is the time to finalize the installation
if (installed)
{
// all the downloader to finalize the install, there may be things to do after the installation is complete
// depending upon the source of the download, and again since it's plugable only the downloader will know how to deal with it
// and by default it will just delete the downloaded .update file
finalized = recommendedUpdateDescriptor.Downloader.FinalizeInstallation(beforeInstallArgs.ProgressViewer, recommendedUpdateDescriptor);
}
}
/*
* Raise the AfterInstall event
* */
AutoUpdateManagerWithDownloadDescriptorEventArgs afterInstallArgs = new AutoUpdateManagerWithDownloadDescriptorEventArgs(this, beforeInstallArgs.ProgressViewer, recommendedUpdateDescriptor);
afterInstallArgs.OperationStatus = installed && finalized;
this.OnAfterInstall(this, afterInstallArgs);
#endregion
#region Step 4. Update Alternate Path
/*
* Raise the X event
* */
AutoUpdateManagerWithDownloadDescriptorCancelEventArgs beforeUpdateAltPathArgs = new AutoUpdateManagerWithDownloadDescriptorCancelEventArgs(this, afterInstallArgs.ProgressViewer, recommendedUpdateDescriptor, false);
this.OnBeforeUpdateAlternatePath(this, beforeUpdateAltPathArgs);
if (!beforeUpdateAltPathArgs.Cancel)
{
// copy the manifest & the update there
this.AdjustUrlOfUpdateInManifest(_options, recommendedUpdateDescriptor);
this.CreateCopyOfManifestInAlternatePath(beforeUpdateAltPathArgs.ProgressViewer, recommendedUpdateDescriptor);
this.CreateCopyOfUpdateInAlternatePath(beforeUpdateAltPathArgs.ProgressViewer, recommendedUpdateDescriptor);
}
// delete the downloaded .update file, don't leave it laying around
File.Delete(recommendedUpdateDescriptor.DownloadedPath);
AutoUpdateManagerWithDownloadDescriptorEventArgs afterUpdateAltPathArgs = new AutoUpdateManagerWithDownloadDescriptorEventArgs(this, beforeUpdateAltPathArgs.ProgressViewer, recommendedUpdateDescriptor);
this.OnAfterUpdateAlternatePath(this, afterUpdateAltPathArgs);
#endregion
#region Step 5. Switch to Latest Version
if (installed)
{
/*
* Raise the BeforeSwitchToLatestVersion event
* */
AutoUpdateManagerWithDownloadDescriptorCancelEventArgs beforeSwitchedArgs = new AutoUpdateManagerWithDownloadDescriptorCancelEventArgs(this, afterUpdateAltPathArgs.ProgressViewer, recommendedUpdateDescriptor, false);
this.OnBeforeSwitchToLatestVersion(this, beforeSwitchedArgs);
// if switching to the latest version was not cancelled
if (!beforeSwitchedArgs.Cancel)
{
/*
* Raise the SwitchToLatestVersion event
* */
AutoUpdateManagerWithDownloadDescriptorEventArgs switchToArgs = new AutoUpdateManagerWithDownloadDescriptorEventArgs(this, beforeSwitchedArgs.ProgressViewer, recommendedUpdateDescriptor);
this.OnSwitchToLatestVersion(this, switchToArgs);
// the rest should be history because the AutoUpdateSnapIn should catch that event and switch to the latest version using the bootstrap
}
}
#endregion
}
catch(ThreadAbortException)
{
Debug.WriteLine("The AutoUpdateManager has encountered a ThreadAbortException.\n\tThe auto-update thread has been aborted.", MY_TRACE_CATEGORY);
try
{
// delete the downloaded .update file, don't leave it laying around
File.Delete(recommendedUpdateDescriptor.DownloadedPath);
}
catch(Exception ex)
{
Debug.WriteLine(ex);
}
}
catch(Exception ex)
{
//Debug.WriteLine(ex);
this.OnException(this, new AutoUpdateExceptionEventArgs(ex));
}
}
/// <summary>
/// Raises the BeforeQueryForLatestVersion event
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected virtual void OnBeforeQueryForLatestVersion(object sender, AutoUpdateManagerCancelEventArgs e)
{
try
{
if (this.BeforeQueryForLatestVersion != null)
this.BeforeQueryForLatestVersion(sender, e);
}
catch(ThreadAbortException)
{
}
catch(Exception ex)
{
Debug.WriteLine(ex);
}
}