public void CanFetchDataThatExists(string dataPath)
{
using (var stream = DataCacheProvider.Fetch(dataPath))
using (var reader = new StreamReader(stream))
{
Assert.IsFalse(string.IsNullOrEmpty(reader.ReadLine()));
}
}
/// <summary>
/// Initializes a new instance of the <see cref="LocalFileSubscriptionStreamReader"/> class.
/// </summary>
/// <param name="dataCacheProvider">The <see cref="IDataCacheProvider"/> used to retrieve a stream of data</param>
/// <param name="source">The local file to be read</param>
/// <param name="entryName">Specifies the zip entry to be opened. Leave null if not applicable,
/// or to open the first zip entry found regardless of name</param>
public LocalFileSubscriptionStreamReader(IDataCacheProvider dataCacheProvider, string source, string entryName = null)
{
var stream = dataCacheProvider.Fetch(source);
if (stream != null)
{
_streamReader = new StreamReader(stream);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="LocalFileSubscriptionStreamReader"/> class.
/// </summary>
/// <param name="dataCacheProvider">The <see cref="IDataCacheProvider"/> used to retrieve a stream of data</param>
/// <param name="source">The local file to be read</param>
/// <param name="entryName">Specifies the zip entry to be opened. Leave null if not applicable,
/// or to open the first zip entry found regardless of name</param>
public LocalFileSubscriptionStreamReader(IDataCacheProvider dataCacheProvider, string source, string entryName = null)
{
var stream = dataCacheProvider.Fetch(source);
if (stream != null)
{
_streamReader = new StreamReader(stream, System.Text.Encoding.GetEncoding("gbk"));
}
}
/// <summary>
/// Initializes a new instance of the <see cref="LocalFileSubscriptionStreamReader"/> class.
/// </summary>
/// <param name="dataCacheProvider">The <see cref="IDataCacheProvider"/> used to retrieve a stream of data</param>
/// <param name="source">The local file to be read</param>
/// <param name="startingPosition">The position in the stream from which to start reading</param>
public LocalFileSubscriptionStreamReader(IDataCacheProvider dataCacheProvider, string source, long startingPosition)
{
var stream = dataCacheProvider.Fetch(source);
if (stream != null)
{
_streamReader = new StreamReader(stream);
if (startingPosition != 0)
{
_streamReader.BaseStream.Seek(startingPosition, SeekOrigin.Begin);
}
}
}
/// <summary>
/// Loads an existing hourly or daily Lean zip file into a SortedDictionary
/// </summary>
protected virtual bool TryLoadFile(string fileName, string entryName, out SortedDictionary <DateTime, string> rows)
{
rows = new SortedDictionary <DateTime, string>();
using (var stream = _dataCacheProvider.Fetch($"{fileName}#{entryName}"))
{
if (stream == null)
{
return(false);
}
using (var reader = new StreamReader(stream))
{
string line;
while ((line = reader.ReadLine()) != null)
{
var time = DateTime.ParseExact(line.AsSpan(0, DateFormat.TwelveCharacter.Length), DateFormat.TwelveCharacter, CultureInfo.InvariantCulture);
rows[time] = line;
}
}
return(true);
}
}
private void ReadAndWrite(IDataCacheProvider dataCacheProvider, byte[] data)
{
dataCacheProvider.Fetch(_tempZipFileEntry);
dataCacheProvider.Store(_tempZipFileEntry, data);
}