public ResourceInfo(ResourceNode resourceNode)
{
ResourceNode = resourceNode;
}
/// <summary>
/// Blocks the thread while closing all resources in parallel.
/// </summary>
private void CloseAllResources()
{
Dictionary <IResource, List <IResource> > dependencies = openedResources.ToDictionary(r => r.Resource, r => new List <IResource>()); // this dictionary will hold resources with dependencies (keys) and what resources depend on them (values)
foreach (var n in openedResources)
{
foreach (var dep in n.StrongDependencies)
{
dependencies[dep].Add(n.Resource);
}
}
Dictionary <IResource, Task> closeTasks = new Dictionary <IResource, Task>();
foreach (var r in openedResources)
{
closeTasks[r.Resource] = new Task(o =>
{
ResourceNode res = (ResourceNode)o;
// Wait for the resource to open to open before closing it.
// in rare cases, another instrument failing open will cause close to be called.
try
{
openTasks[res.Resource].Wait();
}
catch
{
}
// wait for resources that depend on this resource (res) to close before closing this
Task.WaitAll(dependencies[res.Resource].Select(x => closeTasks[x]).ToArray());
var reslog = GetLogSource(res.Resource);
Stopwatch timer = Stopwatch.StartNew();
try
{
res.Resource.Close();
}
catch (Exception e)
{
log.Error("Error while closing \"{0}\": {1}", res.Resource.Name, e.Message);
log.Debug(e);
}
if (reslog != null)
{
reslog.Info(timer, "Resource \"{0}\" closed.", res.Resource);
}
}, r);
}
closeTasks.Values.ToList().ForEach(t => t.Start());
void complainAboutWait()
{
log.Debug("Waiting for resources to close:");
foreach (var res in openTasks.Keys)
{
if (res.IsConnected)
{
log.Debug(" - {0}", res);
}
}
}
using (TimeoutOperation.Create(complainAboutWait))
Task.WaitAll(closeTasks.Values.ToArray());
}