public async Task <IODataAdapter> ResolveAdapterAsync(CancellationToken cancellationToken)
{
if (this.MetadataCache == null)
{
if (string.IsNullOrEmpty(Settings.MetadataDocument))
{
this.MetadataCache = await EdmMetadataCache.GetOrAddAsync(
this.Settings.BaseUri.AbsoluteUri,
async uri =>
{
var metadata = await ResolveMetadataAsync(cancellationToken).ConfigureAwait(false);
return(new EdmMetadataCache(uri, metadata));
});
}
else
{
this.MetadataCache =
EdmMetadataCache.GetOrAdd(
this.Settings.BaseUri.AbsoluteUri,
uri =>
{
var cache = new EdmMetadataCache(uri, Settings.MetadataDocument);
return(cache);
});
}
}
if (this.Settings.PayloadFormat == ODataPayloadFormat.Unspecified)
{
this.Settings.PayloadFormat = this.Adapter.DefaultPayloadFormat;
}
return(this.Adapter);
}
private Session(Uri baseUri, string metadataString)
{
this.Settings = new ODataClientSettings {
BaseUri = baseUri
};
this.MetadataCache = EdmMetadataCache.GetOrAdd(baseUri.AbsoluteUri, uri => new EdmMetadataCache(uri, metadataString));
}
public void ClearMetadataCache()
{
var metadataCache = _metadataCache;
if (metadataCache != null)
{
EdmMetadataCache.Clear(metadataCache.Key);
_metadataCache = null;
}
}
private async Task <EdmMetadataCache> InitializeMetadataCache(CancellationToken cancellationToken)
{
return(await EdmMetadataCache.GetOrAddAsync(
Settings.BaseUri.AbsoluteUri,
async uri =>
{
var metadata = await ResolveMetadataAsync(cancellationToken).ConfigureAwait(false);
return CreateMdc(uri, metadata);
}));
}
public async Task Initialize(CancellationToken cancellationToken)
{
if (_metadataCache == null)
{
_metadataCache = await InitializeMetadataCache(cancellationToken).ConfigureAwait(false);
}
if (_adapter == null)
{
_adapter = _metadataCache.GetODataAdapter(this);
}
}
private Session(ODataClientSettings settings)
{
if (settings.BaseUri == null || string.IsNullOrEmpty(settings.BaseUri.AbsoluteUri))
{
throw new InvalidOperationException("Unable to create client session with no URI specified.");
}
this.Settings = settings;
if (!string.IsNullOrEmpty(settings.MetadataDocument))
{
this.MetadataCache = EdmMetadataCache.GetOrAdd(this.Settings.BaseUri.AbsoluteUri, uri => new EdmMetadataCache(uri, settings.MetadataDocument));
}
}
private Session(ODataClientSettings settings)
{
if (settings.BaseUri == null || string.IsNullOrEmpty(settings.BaseUri.AbsoluteUri))
{
throw new InvalidOperationException("Unable to create client session with no URI specified.");
}
Settings = settings;
if (!string.IsNullOrEmpty(Settings.MetadataDocument))
{
// Create as early as possible as most unit tests require this and also makes it simpler when assigning a static document
_metadataCache = InitializeStaticMetadata(Settings.MetadataDocument);
}
}
public async Task Initialize(CancellationToken cancellationToken)
{
// Just allow one schema request at a time, unlikely to be much contention but avoids multiple requests for same endpoint.
await _initializeSemaphore.WaitAsync(cancellationToken).ConfigureAwait(false);
try
{
if (_metadataCache == null)
{
_metadataCache = await InitializeMetadataCache(cancellationToken)
.ConfigureAwait(false);
}
if (_adapter == null)
{
_adapter = _metadataCache.GetODataAdapter(this);
}
}
finally
{
_initializeSemaphore.Release();
}
}
/// <summary>
/// Clears service metadata cache.
/// </summary>
public static void ClearMetadataCache()
{
EdmMetadataCache.Clear();
}
private EdmMetadataCache InitializeStaticMetadata(string metadata)
{
return(EdmMetadataCache.GetOrAdd(
Settings.BaseUri.AbsoluteUri,
uri => CreateMdc(uri, metadata)));
}