public static CacheHeaderInfo DecodeCacheHeader(byte[] cacheHeader)
{
int offset = 0;
string identityCode = ReadString(cacheHeader, ref offset);
Guid cacheId = ReadGuid(cacheHeader, ref offset);
CacheTypeOption cacheType = ReadEnum <CacheTypeOption>(cacheHeader, ref offset);
string subSection = ReadString(cacheHeader, ref offset);
int columnCount = ReadInt32(cacheHeader, ref offset);
List <CacheColumn> cacheColumns = new List <CacheColumn>();
for (int index = 0; index < columnCount; index++)
{
string name = ReadString(cacheHeader, ref offset);
int size = ReadInt32(cacheHeader, ref offset);
int columnIndex = ReadInt32(cacheHeader, ref offset);
CacheDataTypeOption dataType = ReadEnum <CacheDataTypeOption>(cacheHeader, ref offset);
int extendPropertiesCount = ReadInt32(cacheHeader, ref offset);
Dictionary <string, string> extendedProperties = ReadExtendedProperties(cacheHeader, extendPropertiesCount, ref offset);
cacheColumns.Add(new CacheColumn(columnIndex, name, dataType, size, extendedProperties));
}
int headerExtPropCount = ReadInt32(cacheHeader, ref offset);
Dictionary <string, string> headerExtProperties = ReadExtendedProperties(cacheHeader, headerExtPropCount, ref offset);
return(new CacheHeaderInfo(identityCode, subSection, cacheId, cacheType, cacheColumns.ToArray(), headerExtProperties));
}
public CacheHeaderInfo(string identityCode, string subSection, Guid cacheId, CacheTypeOption cacheType, CacheColumn[] columns, Dictionary <string, string> extendedProperties = null)
{
this.identityCode = identityCode;
this.subSection = subSection;
this.cacheId = cacheId;
this.cacheType = cacheType;
this.columns = new Dictionary <string, CacheColumn>();
foreach (CacheColumn column in columns)
{
this.columns.Add(column.Name, column);
}
this.extendedProperties = extendedProperties;
}
public SequenceKeyedCaching LoadSequenceKeyedCache(string identityCode, BarItemType barType, Guid cacheId, CacheTypeOption cacheType)
{
CacheHeaderInfo header = cacheReader.RequestHeader(identityCode, barType, cacheId, cacheType);
cacheReader.RegisterHeader(header);
return(new SequenceKeyedCaching(header, cacheWriter, cacheReader));
}
public void Initialize(string identityCode, BarItemType barType, Guid cacheId, CacheTypeOption cacheType)
{
if (cacheMode == CacheModeOption.Read || cacheMode == CacheModeOption.ReadWrite)
{
cache = SharedCacheFactory.Instance.LoadTimeKeyedCache(identityCode, barType, cacheId, cacheType);
}
}
public static string CreateCacheFileName(string cacheFolder, string identityCode, string subSection, Guid cacheId, CacheTypeOption cacheType)
{
var cacheFileExtension = AttributeHelper.GetAttribute <CacheFileExtension>(cacheType);
return(Path.Combine(cacheFolder, cacheId == Guid.Empty? string.Empty: cacheId.ToString(), subSection == null? string.Empty: subSection, string.Concat(RemoveInvalidFilePathCharacters(identityCode, "_"), ".", cacheFileExtension.Extension)));
}
public CacheHeaderInfo RequestHeader(string identityCode, BarItemType barType, Guid cacheId, CacheTypeOption cacheType)
{
string fileName = FileHelper.CreateCacheFileName(cacheFolder, identityCode, barType.Code, cacheId, cacheType);
BinaryReader reader = new BinaryReader(File.Open(fileName, FileMode.Open));
int dataPosition = 0;
CacheHeaderInfo headerInfo = FileHelper.ReadBinaryFileHeader(reader, ref dataPosition);
reader.Close();
return(headerInfo);
}