/// <summary>
/// Creates a new, empty file in the directory with the given name.
/// Returns a stream writing this file.
/// </summary>
/// <param name="name"></param>
/// <returns></returns>
/// <exception cref="System.NotImplementedException"></exception>
public override IndexOutput CreateOutput(string name)
{
this.EnsureOpen();
// create the file key
var fileKey = GenerateFileKey(name);
// attempt to get an existing object
CacheFile cacheFile = this.objectCache.Get(fileKey, region) as CacheFile;
// if the object exists, completely remove the item
if (cacheFile != null)
{
DeleteFile(name);
}
// create a new instance of the cache file to be stored
cacheFile = new CacheFile
{
Identifier = Guid.NewGuid().ToString(),
LastModified = DateTimeOffset.UtcNow.Ticks / 10000L
};
// set the cache file info under the file key
this.objectCache.Set(fileKey, cacheFile, region);
// update the filesystem
this.files.Add(name);
Trace.WriteLine(string.Format("File {0} created", name));
// return the stream to the new file
return new CacheOutputStream(
CreateStream(cacheFile));
}
/// <summary>
/// Creates the stream.
/// </summary>
/// <param name="cacheFile">The cache file.</param>
/// <returns></returns>
protected virtual Stream CreateStream(CacheFile cacheFile)
{
// use the lucene segment stream to disable the checks that invalidate the stream
// after it is disposed.
return new LuceneSegmentStream(this.objectCache, cacheFile.Identifier);
}
