/// <summary>
/// Initializes a new instance of the <see cref="StreamReader{T}"/> class.
/// </summary>
/// <param name="streamName">the name of the stream to read.</param>
/// <param name="streamAdapter">the stream adapter to convert data from the stream into the type required by clients of this stream reader.</param>
public StreamReader(string streamName, IStreamAdapter streamAdapter)
{
if (string.IsNullOrWhiteSpace(streamName))
{
throw new ArgumentNullException(nameof(streamName));
}
this.StreamName = streamName;
this.streamAdapter = streamAdapter;
this.StreamAdapterType = streamAdapter?.GetType();
this.pool = PoolManager.Instance.GetPool <T>();
this.readRequestsInternal = new List <ReadRequest>();
this.readRequests = new ReadOnlyCollection <ReadRequest>(this.readRequestsInternal);
this.bufferLock = new object();
this.dataBuffer = new List <Message <T> >(1000);
this.indexBuffer = new List <IndexEntry>(1000);
var itemComparer = Comparer <Message <T> > .Create((m1, m2) => m1.OriginatingTime.CompareTo(m2.OriginatingTime));
var indexComarer = Comparer <IndexEntry> .Create((i1, i2) => i1.OriginatingTime.CompareTo(i2.OriginatingTime));
this.data = new ObservableKeyedCache <DateTime, Message <T> >(null, itemComparer, m => m.OriginatingTime);
this.index = new ObservableKeyedCache <DateTime, IndexEntry>(null, indexComarer, ie => ie.OriginatingTime);
this.instantIndexView = null;
this.instantStreamReaders = new List <EpsilonInstantStreamReader <T> >();
if (this.needsDisposing)
{
this.data.CollectionChanged += this.OnCollectionChanged;
}
}
private IStreamReader GetExistingStreamReader(string streamName, IStreamAdapter streamAdapter)
{
IStreamReader streamReader = this.streamReaders.Find(sr => sr.StreamName == streamName && sr.StreamAdapterType == streamAdapter?.GetType());
if (streamReader == null)
{
throw new ArgumentException("No stream reader exists for the stream.");
}
return(streamReader);
}
private IStreamReader GetOrCreateStreamReader <T>(string streamName, IStreamAdapter streamAdapter)
{
var streamReader = this.streamReaders.Find(sr => sr.StreamName == streamName && sr.StreamAdapterType == streamAdapter?.GetType());
if (streamReader == null)
{
streamReader = new StreamReader <T>(streamName, streamAdapter);
this.streamReaders.Add(streamReader);
}
return(streamReader);
}
private IStreamReader GetStreamReader <T>(string streamName, IStreamAdapter streamAdapter, bool createIfNecessary)
{
var streamReader = this.streamReaders.Find(sr => sr.StreamName == streamName && sr.StreamAdapterType == streamAdapter?.GetType());
if (streamReader == null)
{
if (createIfNecessary)
{
streamReader = new StreamReader <T>(streamName, streamAdapter);
this.streamReaders.Add(streamReader);
}
else
{
throw new ArgumentException("No stream reader exists for the stream binding.");
}
}
return(streamReader);
}
