/// <summary>
/// Tries to read the text from a file.
/// </summary>
/// <param name="filePath">The path to the file to read.</param>
/// <returns>The text from the <paramref name="filePath"/>, or null if it failed to read.</returns>
string TryReadAllText(string filePath)
{
try
{
return(File.ReadAllText(filePath));
}
catch (Exception ex)
{
const string errmsg = "Failed to read temp file `{0}`. Exception: {1}";
if (log.IsErrorEnabled)
{
log.ErrorFormat(errmsg, filePath, ex);
}
_masterReadInfo.AppendError(string.Format(errmsg, filePath, ex));
}
return(null);
}
/// <summary>
/// The worker method for the reader threads.
/// </summary>
/// <param name="o">The arguments.</param>
void ReadThreadWorker(object o)
{
var stateObj = (ThreadWorkerArgs)o;
var callback = stateObj.Callback;
var userState = stateObj.UserState;
var readVersion = stateObj.Version;
if (log.IsDebugEnabled)
{
log.DebugFormat("Running MasterServerReader worker. UserState: {0}. ReadVersion: {1}. Callback: {2}", userState,
readVersion.HasValue ? readVersion.Value.ToString() : "[NULL]", callback);
}
var info = new MasterServerReadInfo();
if (readVersion.HasValue)
info.AddVersion(readVersion.Value);
// Create the master server readers from the file
IEnumerable<DownloadSourceDescriptor> descriptors;
lock (_ioSync)
{
descriptors = DownloadSourceDescriptor.FromDescriptorFile(LocalMasterServerListPath);
}
// Ensure we have descriptors
if (descriptors.Count() == 0)
{
const string errmsg = "No DownloadSourceDescriptors could be found.";
if (log.IsErrorEnabled)
log.Error(errmsg);
info.AppendError(errmsg);
callback(this, info, userState);
return;
}
// Create the source instances
var sources = new List<IDownloadSource>();
foreach (var desc in descriptors)
{
try
{
var src = desc.Instantiate();
sources.Add(src);
}
catch (Exception ex)
{
const string errmsg = "Failed to instantiate DownloadSourceDescriptor `{0}`: {1}";
if (log.IsErrorEnabled)
log.ErrorFormat(errmsg, desc, ex);
info.AppendError(string.Format(errmsg, desc, ex));
}
}
// Ensure we have at least one source
if (sources.Count == 0)
{
const string errmsg = "All DownloadSourceDescriptors failed to be instantiated - no servers available to use.";
if (log.IsErrorEnabled)
log.ErrorFormat(errmsg);
info.AppendError(errmsg);
callback(this, info, userState);
return;
}
// Start the downloader
using (var msd = new MasterServerDownloader(info, sources, readVersion) { DisposeSources = true })
{
// This will block until its complete
msd.Execute();
}
// Save the new information to the files
WriteMasterServersFile(info, LocalMasterServerListPath);
WriteDownloadSourcesFile(info, LocalDownloadSourceListPath);
// Invoke the callback
if (callback != null)
callback(this, info, userState);
}
/// <summary>
/// The worker method for the reader threads.
/// </summary>
/// <param name="o">The arguments.</param>
void ReadThreadWorker(object o)
{
var stateObj = (ThreadWorkerArgs)o;
var callback = stateObj.Callback;
var userState = stateObj.UserState;
var readVersion = stateObj.Version;
if (log.IsDebugEnabled)
{
log.DebugFormat("Running MasterServerReader worker. UserState: {0}. ReadVersion: {1}. Callback: {2}", userState,
readVersion.HasValue ? readVersion.Value.ToString() : "[NULL]", callback);
}
var info = new MasterServerReadInfo();
if (readVersion.HasValue)
{
info.AddVersion(readVersion.Value);
}
// Create the master server readers from the file
IEnumerable <DownloadSourceDescriptor> descriptors;
lock (_ioSync)
{
descriptors = DownloadSourceDescriptor.FromDescriptorFile(LocalMasterServerListPath);
}
// Ensure we have descriptors
if (descriptors.Count() == 0)
{
const string errmsg = "No DownloadSourceDescriptors could be found.";
if (log.IsErrorEnabled)
{
log.Error(errmsg);
}
info.AppendError(errmsg);
callback(this, info, userState);
return;
}
// Create the source instances
var sources = new List <IDownloadSource>();
foreach (var desc in descriptors)
{
try
{
var src = desc.Instantiate();
sources.Add(src);
}
catch (Exception ex)
{
const string errmsg = "Failed to instantiate DownloadSourceDescriptor `{0}`: {1}";
if (log.IsErrorEnabled)
{
log.ErrorFormat(errmsg, desc, ex);
}
info.AppendError(string.Format(errmsg, desc, ex));
}
}
// Ensure we have at least one source
if (sources.Count == 0)
{
const string errmsg = "All DownloadSourceDescriptors failed to be instantiated - no servers available to use.";
if (log.IsErrorEnabled)
{
log.ErrorFormat(errmsg);
}
info.AppendError(errmsg);
callback(this, info, userState);
return;
}
// Start the downloader
using (var msd = new MasterServerDownloader(info, sources, readVersion)
{
DisposeSources = true
})
{
// This will block until its complete
msd.Execute();
}
// Save the new information to the files
WriteMasterServersFile(info, LocalMasterServerListPath);
WriteDownloadSourcesFile(info, LocalDownloadSourceListPath);
// Invoke the callback
if (callback != null)
{
callback(this, info, userState);
}
}
