/// <summary>
/// Searches the cache for a particular phrase.
/// </summary>
/// <param name="phrase">The phrase information.</param>
/// <returns>The phrase information if found in the cache or <c>null</c>.</returns>
/// <exception cref="ArgumentNullException">Thrown if <pararef name="phrase" /> is <c>null</c>.</exception>
/// <exception cref="InvalidOperationException">Thrown if the cache has been stopped.</exception>
public Phrase FindPhrase(Phrase phrase)
{
Phrase existing;
if (phrase == null)
{
throw new ArgumentNullException("phrase");
}
// The requested voice might not exist, so get the actual
// voice that can be used.
phrase.ActualVoice = SpeechEngine.GetVoice(phrase.Voice);
if (phrase.ActualVoice == null)
{
return(null); // No installed voices
}
lock (syncLock)
{
if (!isRunning)
{
throw new InvalidOperationException("[PhraseCache] is stopped.");
}
if (index.TryGetValue(GetCacheKey(phrase), out existing))
{
return(existing);
}
else
{
return(null);
}
}
}
/// <summary>
/// Handles background activities.
/// </summary>
/// <param name="state">Not used.</param>
private void OnBkTimer(object state)
{
// Update performance counters.
CorePerf.Runtime.RawValue = (int)(DateTime.UtcNow - startTime).TotalMinutes;
// Handle global background activities.
SpeechEngine.OnBkTask();
}
/// <summary>
/// Adds the genrated phrase audio file passed to the cache.
/// </summary>
/// <param name="phrase">The phrase being added.</param>
/// <exception cref="ArgumentNullException">Thrown if <paramref name="phrase" /> is <c>null</c>.</exception>
/// <exception cref="ArgumentException">Thrown if the <paramref name="phrase" />.<see cref="Path"/> property is <c>null</c>.</exception>
/// <exception cref="InvalidOperationException">Thrown if the cache has been stopped or if a one-time phrase is passed.</exception>
public void AddPhrase(Phrase phrase)
{
Phrase existing;
if (phrase == null)
{
throw new ArgumentNullException("phrase");
}
if (phrase.Path == null)
{
throw new ArgumentException("[Path] property cannot be NULL.", "phrase");
}
if (phrase.IsOneTime)
{
throw new InvalidOperationException("[AddPhrase] cannot accept a one-time phrase.");
}
phrase = phrase.Clone();
// The requested voice might not exist, so get the actual
// voice that can be used.
phrase.ActualVoice = SpeechEngine.GetVoice(phrase.Voice);
if (phrase.ActualVoice == null)
{
return; // No installed voices
}
lock (syncLock)
{
if (!isRunning)
{
throw new InvalidOperationException("[PhraseCache] is stopped.");
}
phrase.LastAccessUtc = DateTime.UtcNow;
if (index.TryGetValue(GetCacheKey(phrase), out existing))
{
// The phrase is already in the index.
existing.LastAccessUtc = phrase.LastAccessUtc;
}
else
{
index.Add(GetCacheKey(phrase), phrase);
}
}
}
/// <summary>
/// Called by NeonSwitch to execute a synchronous subcommand.
/// </summary>
/// <param name="args">The command execution context including the arguments.</param>
/// <remarks>
/// <note>
/// Implementations can use the various <see cref="ExecuteEventArgs.Write(string)"/> method
/// overloads in <see cref="ExecuteEventArgs"/> to stream text back to the caller.
/// </note>
/// </remarks>
public void Execute(ExecuteEventArgs args)
{
try
{
var phrase = Phrase.Decode(args.SubcommandArgs);
args.Write(SpeechEngine.SpeakToFile(phrase));
}
catch (Exception e)
{
SysLog.LogException(e);
args.Write(SpeechEngine.ErrorAudioPath);
}
}
/// <summary>
/// Starts the service, associating it with an <see cref="IServiceHost" /> instance.
/// </summary>
/// <param name="serviceHost">The service user interface.</param>
/// <param name="args">Command line arguments.</param>
public void Start(IServiceHost serviceHost, string[] args)
{
lock (syncLock)
{
if (router != null)
{
return; // Already started
}
// Global initialization
startTime = DateTime.UtcNow;
NetTrace.Start();
CoreApp.InstallPerfCounters();
// Service initialization
this.serviceHost = serviceHost;
try
{
SysLog.LogInformation("NeonSwitch v{0} Start", Helper.GetVersionString());
router = new LeafRouter();
router.Start();
state = ServiceState.Running;
bkTimer = new GatedTimer(OnBkTimer, null, CoreApp.BkTaskInterval);
SpeechEngine.Start(SpeechEngineSettings.LoadConfig("NeonSwitch.Speech"));
#if DEBUG
// $todo(jeff.lill): Delete this.
SwitchTest.Test();
#endif
// Indicate that the switch core service is open for business. NeonSwitch
// application instance loaders will spin, waiting for this to be set before
// calling the application's main function.
Switch.SetGlobal(SwitchGlobal.NeonSwitchReady, "true");
}
catch (Exception e)
{
SpeechEngine.Stop();
if (bkTimer != null)
{
bkTimer.Dispose();
bkTimer = null;
}
if (router != null)
{
router.Stop();
router = null;
}
SysLog.LogException(e);
throw;
}
}
}
