/// <exception cref="System.Exception"/>
public override FSDataInputStream Load(DFSClientCache.DFSInputStreamCaheKey key)
{
DFSClient client = this._enclosing.GetDfsClient(key.userId);
DFSInputStream dis = client.Open(key.inodePath);
return(client.CreateWrappedInputStream(dis));
}
/// <exception cref="System.IO.IOException"/>
private void OnOpen(ChannelHandlerContext ctx)
{
string nnId = @params.NamenodeId();
int bufferSize = @params.BufferSize();
long offset = @params.Offset();
long length = @params.Length();
DefaultHttpResponse response = new DefaultHttpResponse(HttpVersion.Http11, HttpResponseStatus
.Ok);
HttpHeaders headers = response.Headers();
// Allow the UI to access the file
headers.Set(HttpHeaders.Names.AccessControlAllowMethods, HttpMethod.Get);
headers.Set(HttpHeaders.Names.AccessControlAllowOrigin, "*");
headers.Set(HttpHeaders.Names.ContentType, ApplicationOctetStream);
headers.Set(HttpHeaders.Names.Connection, HttpHeaders.Values.Close);
DFSClient dfsclient = NewDfsClient(nnId, conf);
HdfsDataInputStream @in = dfsclient.CreateWrappedInputStream(dfsclient.Open(path,
bufferSize, true));
@in.Seek(offset);
long contentLength = @in.GetVisibleLength() - offset;
if (length >= 0)
{
contentLength = Math.Min(contentLength, length);
}
InputStream data;
if (contentLength >= 0)
{
headers.Set(HttpHeaders.Names.ContentLength, contentLength);
data = new LimitInputStream(@in, contentLength);
}
else
{
data = @in;
}
ctx.Write(response);
ctx.WriteAndFlush(new _ChunkedStream_221(dfsclient, data)).AddListener(ChannelFutureListener
.Close);
}
/// <exception cref="System.IO.IOException"/>
/// <exception cref="Org.Apache.Hadoop.FS.UnresolvedLinkException"/>
public override FSDataInputStream Open(Path f, int bufferSize)
{
DFSInputStream dfsis = dfs.Open(GetUriPath(f), bufferSize, verifyChecksum);
return(dfs.CreateWrappedInputStream(dfsis));
}
