#pragma warning disable CS1998 // Async method lacks 'await' operators and will run synchronously
/// <inheritdoc/>
public override async ValueTask <IIxInstanceLock> GetInstance(
IIxInstance parentInstance,
IxIdentifier identifier,
IxHost.IxResolveContext context,
[CanBeNull] IxResolveFrame frame)
{
if (parentInstance == null)
{
throw new ArgumentNullException(nameof(parentInstance));
}
lock (Host.InstanceTreeSyncRoot)
{
IIxInstanceLock scopeLock;
IxScopeInstance singleton;
object data = parentInstance.GetData(this);
if (data == null)
{
singleton = new IxScopeInstance(this, parentInstance, out scopeLock);
parentInstance.SetData(this, singleton);
}
else
{
singleton = (IxScopeInstance)data;
scopeLock = new IxInstancePinLock(singleton);
}
return(scopeLock);
}
}
#pragma warning restore CS1998 // Async method lacks 'await' operators and will run synchronously
public IxScopeInstance GetRootInstance()
{
if (ParentNode != null)
{
throw new InvalidOperationException("Only root scope can produce root instance.");
}
if (_rootInstance == null)
{
lock (Host.InstanceTreeSyncRoot)
{
if (_rootInstance == null)
{
IIxInstanceLock creatorLock;
_rootInstance = new IxScopeInstance(this, null, out creatorLock);
creatorLock.Dispose();
}
}
}
return(_rootInstance);
}
/// <summary>
/// Second initialization phase.
/// </summary>
/// <param name="config">Host configuration.</param>
/// <returns>Async execution TPL task.</returns>
public async Task Initialize(IIxHostConfig config)
{
var allConfigNodes = new HashSet <IIxProviderNodeConfig>();
config.Nodes.Add(
new IxStdProviderConfig
{
Identifier = new IxIdentifier(typeof(IIxHost)),
InstanceBuilder = new IxExistingInstanceFactoryConfig <IIxHost>(this),
DisposeHandler = obj => TaskEx.CompletedTask
});
Action <IIxProviderNodeConfig, IxProviderNode> buildNodeAction = null;
buildNodeAction = (nodeConfig, parentNode) =>
{
if (!allConfigNodes.Add(nodeConfig))
{
throw new InvalidOperationException(
"Configuration contains the same object multiple times. Currently it's not allowed to avoid visitor cycles.");
}
IxProviderNode node = ProviderNodeBuilder.Delegate(nodeConfig, parentNode);
// parent node is null only for root scope.
if (parentNode == null)
{
_rootScope = (IxScope)node;
}
foreach (IIxProviderNodeConfig childConfig in nodeConfig.Nodes)
{
buildNodeAction(childConfig, node);
}
};
buildNodeAction(config, null);
Action <IxProviderNode> importRegistrationsFromChildren = null;
importRegistrationsFromChildren = node =>
{
foreach (IxProviderNode child in node.Nodes)
{
importRegistrationsFromChildren(child);
// Applying export to parent filter
// while Blocking from exporting resolve pathes with zero-length.
foreach (KeyValuePair <IxIdentifier, IxResolvePath> kvp in
child.VisibleNodes.Where(
x => child.ExportToParentFilter(x.Key) &&
x.Value.Path.Any()))
{
if (node.VisibleNodes.ContainsKey(kvp.Key))
{
throw new InvalidOperationException("Export to parent node conflict.");
}
node.VisibleNodes.Add(kvp.Key, kvp.Value.ReRoot(node));
}
}
};
importRegistrationsFromChildren(_rootScope);
Action <IxProviderNode> exportRegistrationsToChildren = null;
exportRegistrationsToChildren = node =>
{
KeyValuePair <IxIdentifier, IxResolvePath>[] registrationsToExport =
node.VisibleNodes.Where(x => node.ExportFilter(x.Key)).ToArray();
if (!registrationsToExport.Any())
{
return;
}
foreach (IxProviderNode child in node.Nodes)
{
foreach (KeyValuePair <IxIdentifier, IxResolvePath> kvp in
registrationsToExport.Where(x => child.ImportFilter(x.Key)))
{
IxResolvePath resolvePath;
if (child.VisibleNodes.TryGetValue(kvp.Key, out resolvePath))
{
// Skipping self to children.
if (resolvePath.Path.Any())
{
// Direct cycle resolution replacement.
if (!resolvePath.Target.ParentReplacementNodes.ContainsKey(kvp.Key))
{
resolvePath.Target.ParentReplacementNodes.Add(kvp.Key, kvp.Value);
}
}
}
else
{
child.VisibleNodes.Add(kvp.Key, kvp.Value);
}
}
exportRegistrationsToChildren(child);
}
};
exportRegistrationsToChildren(_rootScope);
_rootScopeInstance = _rootScope.GetRootInstance();
var resolveContext = new IxResolveContext(_rootScopeInstance, null, new Dictionary <IxIdentifier, object>());
using (IIxInstanceLock rootResolverLock = await Resolve(
_rootScopeInstance,
new IxIdentifier(typeof(IIxResolver)),
resolveContext,
null))
{
var resolver = (IxResolver)rootResolverLock.Target.Object;
Critical.CheckedAssert(
resolver.ParentContext == null && resolver.ParentFrame == null,
"After resolve finished, resolver should not be bound to any context.");
Resolver = resolver;
}
}
