/// <summary>
/// Requests a registered object to unregister on app domain unload in a web project
/// </summary>
/// <param name="immediate">true to indicate the registered object should unregister from the hosting environment before returning; otherwise, false.</param>
public void Stop(bool immediate)
{
if (immediate)
{
//This is sort of a hack at the moment. We are disposing the searchers at the last possible point in time because there might
// still be pages executing when 'immediate' == false. In which case, when we close the readers, exceptions will occur
// if the search results are still being enumerated.
// I've tried using DecRef and IncRef to keep track of searchers using readers, however there is no guarantee that DecRef can
// be called when a search is finished and since search results are lazy, we don't know when they end unless people dispose them
// or always use a foreach loop which can't really be forced. The only alternative to using DecRef and IncRef would be to make the results
// not lazy which isn't good.
foreach (var searcher in SearchProviderCollection.OfType <IDisposable>())
{
searcher.Dispose();
}
OpenReaderTracker.Current.CloseAllReaders();
HostingEnvironment.UnregisterObject(this);
}
else
{
foreach (var indexer in IndexProviderCollection.OfType <IDisposable>())
{
indexer.Dispose();
}
}
}
/// <summary>
/// Requests a registered object to unregister on app domain unload in a web project
/// </summary>
/// <param name="immediate">true to indicate the registered object should unregister from the hosting environment before returning; otherwise, false.</param>
public void Stop(bool immediate)
{
foreach (var searcher in SearchProviderCollection.OfType <IDisposable>())
{
searcher.Dispose();
}
foreach (var indexer in IndexProviderCollection.OfType <IDisposable>())
{
indexer.Dispose();
}
}
/// <summary>
/// Before any of the index/search collections are accessed, the providers need to be loaded
/// </summary>
private void EnsureProviders()
{
if (!_providersInit)
{
lock (_lock)
{
// Do this again to make sure _provider is still null
if (!_providersInit)
{
// Load registered providers and point _provider to the default provider
_indexProviderCollection = new IndexProviderCollection();
ProvidersHelper.InstantiateProviders(ExamineSettings.Instance.IndexProviders.Providers, _indexProviderCollection, typeof(BaseIndexProvider));
_searchProviderCollection = new SearchProviderCollection();
ProvidersHelper.InstantiateProviders(ExamineSettings.Instance.SearchProviders.Providers, _searchProviderCollection, typeof(BaseSearchProvider));
//set the default
if (!string.IsNullOrEmpty(ExamineSettings.Instance.SearchProviders.DefaultProvider))
{
_defaultSearchProvider = _searchProviderCollection[ExamineSettings.Instance.SearchProviders.DefaultProvider];
}
if (_defaultSearchProvider == null)
{
throw new ProviderException("Unable to load default search provider");
}
_providersInit = true;
//check if we need to rebuild on startup
if (ExamineSettings.Instance.RebuildOnAppStart)
{
foreach (var index in _indexProviderCollection.Cast <IIndexer>())
{
if (!index.IndexExists())
{
var args = new BuildingEmptyIndexOnStartupEventArgs(index);
OnBuildingEmptyIndexOnStartup(args);
if (!args.Cancel)
{
index.RebuildIndex();
}
}
}
}
}
}
}
}
/// <summary>
/// Before any of the index/search collections are accessed, the providers need to be loaded
/// </summary>
private void EnsureProviders()
{
if (!_providersInit)
{
lock (_lock)
{
// Do this again to make sure _provider is still null
if (!_providersInit)
{
// Load registered providers and point _provider to the default provider
_indexProviderCollection = new IndexProviderCollection();
ProvidersHelper.InstantiateProviders(ExamineSettings.Instance.IndexProviders.Providers, _indexProviderCollection, typeof(BaseIndexProvider));
_searchProviderCollection = new SearchProviderCollection();
ProvidersHelper.InstantiateProviders(ExamineSettings.Instance.SearchProviders.Providers, _searchProviderCollection, typeof(BaseSearchProvider));
//set the default
if (!string.IsNullOrEmpty(ExamineSettings.Instance.SearchProviders.DefaultProvider))
{
_defaultSearchProvider = _searchProviderCollection[ExamineSettings.Instance.SearchProviders.DefaultProvider];
}
if (_defaultSearchProvider == null)
{
throw new ProviderException("Unable to load default search provider");
}
_providersInit = true;
//check if we need to rebuild on startup
if (ExamineSettings.Instance.RebuildOnAppStart)
{
foreach (IIndexer index in _indexProviderCollection)
{
var rebuild = false;
var healthy = true;
Exception unhealthyEx = null;
var exists = index.IndexExists();
if (!exists)
{
rebuild = true;
}
if (!rebuild)
{
healthy = IsIndexHealthy(index, out unhealthyEx);
if (!healthy)
{
rebuild = true;
}
}
//if it doesn't exist ... or if it's unhealthy/corrupt
if (rebuild)
{
var args = new BuildingEmptyIndexOnStartupEventArgs(index, healthy, unhealthyEx);
OnBuildingEmptyIndexOnStartup(args);
if (!args.Cancel)
{
index.RebuildIndex();
}
}
}
}
}
}
}
}
