io.aeron.driver.media

Class DataTransportPoller

java.lang.Object

org.agrona.nio.TransportPoller

io.aeron.driver.media.UdpTransportPoller

io.aeron.driver.media.DataTransportPoller

All Implemented Interfaces:

AutoCloseable

public final class DataTransportPoller
extends UdpTransportPoller

Encapsulates the polling of data UdpChannelTransports using whatever means provides the lowest latency.

Field Summary

Fields inherited from class io.aeron.driver.media.UdpTransportPoller

errorHandler

Fields inherited from class org.agrona.nio.TransportPoller

ITERATION_THRESHOLD, PUBLIC_SELECTED_KEYS_FIELD, SELECTED_KEYS_FIELD, selectedKeySet, selector

Constructor Summary

Constructors

Constructor and Description
DataTransportPoller(ErrorHandler errorHandler) Construct a new TransportPoller with an ErrorHandler for logging.

Method Summary

Modifier and Type	Method and Description
void	cancelRead(ReceiveChannelEndpoint channelEndpoint, UdpChannelTransport transport) Cancel the reading of a given transport.
void	cancelRead(UdpChannelTransport transport) Cancel previous registration.
void	checkForReResolutions(long nowNs, DriverConductorProxy conductorProxy) Check if any of the registered channels or transports require re-resolution.
void	close()
int	pollTransports() Explicit event loop processing as a poll
SelectionKey	registerForRead(ReceiveChannelEndpoint channelEndpoint, UdpChannelTransport transport, int transportIndex) Register a new transport to be read.
SelectionKey	registerForRead(UdpChannelTransport transport) Register channel for read.

Methods inherited from class org.agrona.nio.TransportPoller

selectNowWithoutProcessing

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DataTransportPoller

public DataTransportPoller(ErrorHandler errorHandler)

Construct a new TransportPoller with an ErrorHandler for logging.

Parameters:

errorHandler - which can be used to log errors and continue.

Method Detail

close

public void close()

Specified by:

close in interface AutoCloseable

Overrides:

close in class TransportPoller

pollTransports

public int pollTransports()

Description copied from class: UdpTransportPoller

Explicit event loop processing as a poll

Specified by:

pollTransports in class UdpTransportPoller

Returns:

the number of frames processed.

registerForRead

public SelectionKey registerForRead(UdpChannelTransport transport)

Description copied from class: UdpTransportPoller

Register channel for read.

Specified by:

registerForRead in class UdpTransportPoller

Parameters:

transport - to associate with read.

Returns:

SelectionKey for registration to cancel.

registerForRead

public SelectionKey registerForRead(ReceiveChannelEndpoint channelEndpoint,
                                    UdpChannelTransport transport,
                                    int transportIndex)

Register a new transport to be read.

Parameters:

channelEndpoint - to which the transport belongs.

transport - new transport to be registered.

transportIndex - for the transport in the channel.

Returns:

SelectionKey for registration to cancel.

cancelRead

public void cancelRead(UdpChannelTransport transport)

Description copied from class: UdpTransportPoller

Cancel previous registration.

Specified by:

cancelRead in class UdpTransportPoller

Parameters:

transport - to cancel read for

cancelRead

public void cancelRead(ReceiveChannelEndpoint channelEndpoint,
                       UdpChannelTransport transport)

Cancel the reading of a given transport.

Parameters:

channelEndpoint - to which the transport belongs.

transport - transport which was previously registered.

checkForReResolutions

public void checkForReResolutions(long nowNs,
                                  DriverConductorProxy conductorProxy)

Check if any of the registered channels or transports require re-resolution.

Parameters:

nowNs - as the current time.

conductorProxy - for sending re-resolution requests.