org.gridgain.grid.kernal.ggfs.hadoop

Interface GridGgfsHadoopEx

All Superinterfaces:

GridGgfsHadoop

All Known Implementing Classes:

GridGgfsHadoopInProc, GridGgfsHadoopOutProc

public interface GridGgfsHadoopEx
extends GridGgfsHadoop

Extended GGFS server interface.

Method Summary

Methods

Modifier and Type	Method and Description
void	addEventListener(GridGgfsHadoopStreamDelegate delegate, GridGgfsHadoopStreamEventListener lsnr) Adds event listener that will be invoked when connection with server is lost or remote error has occurred.
void	closeStream(GridGgfsHadoopStreamDelegate delegate) Close server stream.
void	flush(GridGgfsHadoopStreamDelegate delegate) Flush output stream.
org.gridgain.grid.util.lang.GridPlainFuture<byte[]>	readData(GridGgfsHadoopStreamDelegate delegate, long pos, int len, byte[] outBuf, int outOff, int outLen) Asynchronously reads specified amount of bytes from opened input stream.
void	removeEventListener(GridGgfsHadoopStreamDelegate delegate) Removes event listener that will be invoked when connection with server is lost or remote error has occurred.
void	writeData(GridGgfsHadoopStreamDelegate delegate, byte[] data, int off, int len) Writes data to the stream with given streamId.

Methods inherited from interface org.gridgain.grid.kernal.ggfs.hadoop.GridGgfsHadoop

affinity, append, close, contentSummary, create, delete, fsStatus, handshake, info, listFiles, listPaths, mkdirs, open, open, rename, setTimes, update

Method Detail

addEventListener

void addEventListener(GridGgfsHadoopStreamDelegate delegate,
                    GridGgfsHadoopStreamEventListener lsnr)

Adds event listener that will be invoked when connection with server is lost or remote error has occurred. If connection is closed already, callback will be invoked synchronously inside this method.

Parameters:

delegate - Stream delegate.

lsnr - Event listener.

removeEventListener

void removeEventListener(GridGgfsHadoopStreamDelegate delegate)

Removes event listener that will be invoked when connection with server is lost or remote error has occurred.

Parameters:

delegate - Stream delegate.

readData

org.gridgain.grid.util.lang.GridPlainFuture<byte[]> readData(GridGgfsHadoopStreamDelegate delegate,
                                                           long pos,
                                                           int len,
                                                           @Nullable
                                                           byte[] outBuf,
                                                           int outOff,
                                                           int outLen)

Asynchronously reads specified amount of bytes from opened input stream.

Parameters:

delegate - Stream delegate.

pos - Position to read from.

len - Data length to read.

outBuf - Optional output buffer. If buffer length is less then len, all remaining bytes will be read into new allocated buffer of length {len - outBuf.length} and this buffer will be the result of read future.

outOff - Output offset.

outLen - Output length.

Returns:

Read data.

writeData

void writeData(GridGgfsHadoopStreamDelegate delegate,
             byte[] data,
             int off,
             int len)
               throws IOException

Writes data to the stream with given streamId. This method does not return any future since no response to write request is sent.

Parameters:

delegate - Stream delegate.

data - Data to write.

off - Offset.

len - Length.

Throws:

IOException - If failed.

closeStream

void closeStream(GridGgfsHadoopStreamDelegate delegate)
                 throws IOException

Close server stream.

Parameters:

delegate - Stream delegate.

Throws:

IOException - If failed.

flush

void flush(GridGgfsHadoopStreamDelegate delegate)
           throws IOException

Flush output stream.

Parameters:

delegate - Stream delegate.

Throws:

IOException - If failed.