public FileIndexKeyValueStorage(
IEnumerable <KeyValuePair <TKey, TValue> > values,
FileInfo fi,
long initialSize,
ISerializer <TValue> serializer,
long count,
IRandomAccessStore reader,
IIndexSerializer <TKey> indexSerializer = null,
IEnumerable <KeyValuePair <string, object> > additionalData = null,
JsonSerializerSettings additionalDataSerializerSettings = null)
{
this.serializer = serializer;
indexSerializer = indexSerializer ?? new DictionaryIndexSerializer <TKey>();
this.reader = reader;
try
{
this.WriteData(values, serializer, indexSerializer, count, fi, additionalData, additionalDataSerializerSettings);
}
catch (Exception)
{
// if something unexpectedly breaks during population (easy to happen externally as we are fed an IEnumerable)
// then ensure no partially populated files are left around
this.Dispose();
File.Delete(fi.FullName);
throw;
}
}
public static FileIndexKeyValueStorage <TKey, TValue> CreateOrOpen(
IEnumerable <KeyValuePair <TKey, TValue> > values,
string filename,
long initialSize,
long count,
ISerializer <TValue> serializer = null,
AccessStrategy strategy = AccessStrategy.MemoryMapped,
IIndexSerializer <TKey> indexSerializer = null,
IEnumerable <KeyValuePair <string, object> > additionalMetadata = null)
{
var fi = new FileInfo(filename);
IRandomAccessStore reader = GetCreateReaderForStrategy(initialSize, strategy, fi);
if (fi.Exists)
{
try
{
return(new FileIndexKeyValueStorage <TKey, TValue>(fi, reader, serializer, indexSerializer));
}
catch (NoMagicException)
{
// no magic almost certainly means the file was partially written as the header is written last
return(new FileIndexKeyValueStorage <TKey, TValue>(values, fi, initialSize, serializer, count, reader, indexSerializer, additionalData: additionalMetadata));
}
}
else
{
return(new FileIndexKeyValueStorage <TKey, TValue>(values, fi, initialSize, serializer, count, reader, indexSerializer, additionalData: additionalMetadata));
}
}
public void Dispose()
{
if (this.reader != null)
{
this.reader.Dispose();
this.reader = null;
}
}
public unsafe FileIndexKeyValueStorage(
FileInfo fi,
IRandomAccessStore reader,
ISerializer <TValue> serializer = null,
IIndexSerializer <TKey> indexSerializer = null)
{
indexSerializer = indexSerializer ?? new DictionaryIndexSerializer <TKey>();
this.reader = reader;
try
{
// file begins with header
Header header = reader.Read <Header>(0);
if (header.magic == Guid.Empty)
{
throw new NoMagicException(fi.FullName);
}
if (header.magic != Header.expectedMagic)
{
throw new InvalidMagicException(fi.FullName);
}
if (serializer == null)
{
this.serializer = this.ReadSerializerFromHeader(header);
}
else
{
this.serializer = serializer;
}
byte[] indexJsonBytes = reader.ReadArray(header.IndexPosition, header.IndexLength);
this.index = indexSerializer.Deserialize(indexJsonBytes);
var blocks = new List <CustomDataBlock>(header.customBlockCount);
for (int i = 0; i < header.customBlockCount; i++)
{
long customBlockPosition = GetCustomBlockPosition(header, i);
var block = reader.Read <CustomDataBlock>(customBlockPosition);
blocks.Add(block);
}
this.customBlockIndex = blocks.ToDictionary(b => new string(b.Name).Trim());
}
catch (Exception)
{
this.Dispose();
throw;
}
}
public PolicyStore(IRandomAccessStore source, Policy policy)
{
this.source = source;
this.policy = policy;
}
