org.gridgain.grid.kernal.ggfs.hadoop

Interface GridGgfsHadoopIo

All Known Implementing Classes:

GridGgfsHadoopIpcIo

public interface GridGgfsHadoopIo

IO abstraction layer for GGFS client. Two kind of messages are expected to be sent: requests with response and request without response.

Method Summary

Methods

Modifier and Type	Method and Description
void	addEventListener(GridGgfsHadoopIpcIoListener lsnr) Adds event listener that will be invoked when connection with server is lost or remote error has occurred.
void	removeEventListener(GridGgfsHadoopIpcIoListener lsnr) Removes event listener that will be invoked when connection with server is lost or remote error has occurred.
org.gridgain.grid.util.lang.GridPlainFuture<GridGgfsMessage>	send(GridGgfsMessage msg) Sends given GGFS client message and asynchronously awaits for response.
<T> org.gridgain.grid.util.lang.GridPlainFuture<T>	send(GridGgfsMessage msg, byte[] outBuf, int outOff, int outLen) Sends given GGFS client message and asynchronously awaits for response.
void	sendPlain(GridGgfsMessage msg) Sends given message and does not wait for response.

Method Detail

send

org.gridgain.grid.util.lang.GridPlainFuture<GridGgfsMessage> send(GridGgfsMessage msg)
                                                                  throws org.gridgain.grid.GridException

Sends given GGFS client message and asynchronously awaits for response.

Parameters:

msg - Message to send.

Returns:

Future that will be completed.

Throws:

org.gridgain.grid.GridException - If a message cannot be sent (connection is broken or client was closed).

send

<T> org.gridgain.grid.util.lang.GridPlainFuture<T> send(GridGgfsMessage msg,
                                                      @Nullable
                                                      byte[] outBuf,
                                                      int outOff,
                                                      int outLen)
                                                    throws org.gridgain.grid.GridException

Sends given GGFS client message and asynchronously awaits for response. When IO detects response beginning for given message it stops reading data and passes input stream to closure which can read response in a specific way.

Parameters:

msg - Message to send.

outBuf - Output buffer. If null, the output buffer is not used.

outOff - Output buffer offset.

outLen - Output buffer length.

Returns:

Future that will be completed when response is returned from closure.

Throws:

org.gridgain.grid.GridException - If a message cannot be sent (connection is broken or client was closed).

sendPlain

void sendPlain(GridGgfsMessage msg)
               throws org.gridgain.grid.GridException

Sends given message and does not wait for response.

Parameters:

msg - Message to send.

Throws:

org.gridgain.grid.GridException - If send failed.

addEventListener

void addEventListener(GridGgfsHadoopIpcIoListener 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:

lsnr - Event listener.

removeEventListener

void removeEventListener(GridGgfsHadoopIpcIoListener lsnr)

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

Parameters:

lsnr - Event listener.