org.apache.nifi.cluster.protocol.impl

Class ClusterCoordinationProtocolSenderListener

java.lang.Object

org.apache.nifi.cluster.protocol.impl.ClusterCoordinationProtocolSenderListener

All Implemented Interfaces:

ClusterCoordinationProtocolSender, ProtocolListener

public class ClusterCoordinationProtocolSenderListener
extends Object
implements ClusterCoordinationProtocolSender, ProtocolListener

A wrapper class for consolidating a protocol sender and listener for the cluster manager.

Field Summary

Fields

Modifier and Type	Field and Description
private ProtocolListener	listener
private ClusterCoordinationProtocolSender	sender

Constructor Summary

Constructors

Constructor and Description
ClusterCoordinationProtocolSenderListener(ClusterCoordinationProtocolSender sender, ProtocolListener listener)

Method Summary

Modifier and Type	Method and Description
void	addHandler(ProtocolHandler handler) Registers a handler with the listener.
void	disconnect(DisconnectMessage msg) Sends a "disconnection request" message to a node.
Collection<ProtocolHandler>	getHandlers()
boolean	isRunning()
void	notifyNodeStatusChange(Set<NodeIdentifier> nodesToNotify, NodeStatusChangeMessage msg) Notifies all nodes in the given set that a node in the cluster has a new status
void	offload(OffloadMessage msg) Sends an "offload request" message to a node.
boolean	removeHandler(ProtocolHandler handler) Unregisters the handler with the listener.
NodeConnectionStatus	requestNodeConnectionStatus(String hostname, int port) Sends a request to the given hostname and port to request its connection status
ReconnectionResponseMessage	requestReconnection(ReconnectionRequestMessage msg) Sends a "reconnection request" message to a node.
void	setBulletinRepository(BulletinRepository bulletinRepository) Sets the BulletinRepository that can be used to report bulletins
void	start() Starts the instance for listening for messages.
void	stop() Stops the instance from listening for messages.

Methods inherited from class java.lang.Object

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

Field Detail

sender

private final ClusterCoordinationProtocolSender sender

listener

private final ProtocolListener listener

Constructor Detail

ClusterCoordinationProtocolSenderListener

public ClusterCoordinationProtocolSenderListener(ClusterCoordinationProtocolSender sender,
                                                 ProtocolListener listener)

Method Detail

stop

public void stop()
          throws IOException

Description copied from interface: ProtocolListener

Stops the instance from listening for messages. Stop may only be called if the instance is running.

Specified by:

stop in interface ProtocolListener

Throws:

IOException - ex

start

public void start()
           throws IOException

Description copied from interface: ProtocolListener

Starts the instance for listening for messages. Start may only be called if the instance is not running.

Specified by:

start in interface ProtocolListener

Throws:

IOException - ex

isRunning

public boolean isRunning()

Specified by:

isRunning in interface ProtocolListener

Returns:

true if the instance is started; false otherwise.

removeHandler

public boolean removeHandler(ProtocolHandler handler)

Description copied from interface: ProtocolListener

Unregisters the handler with the listener.

Specified by:

removeHandler in interface ProtocolListener

Parameters:

handler - a handler

Returns:

true if the handler was removed; false otherwise

getHandlers

public Collection<ProtocolHandler> getHandlers()

Specified by:

getHandlers in interface ProtocolListener

Returns:

the handlers registered with the listener

addHandler

public void addHandler(ProtocolHandler handler)

Description copied from interface: ProtocolListener

Registers a handler with the listener.

Specified by:

addHandler in interface ProtocolListener

Parameters:

handler - a handler

setBulletinRepository

public void setBulletinRepository(BulletinRepository bulletinRepository)

Description copied from interface: ClusterCoordinationProtocolSender

Sets the BulletinRepository that can be used to report bulletins

Specified by:

setBulletinRepository in interface ClusterCoordinationProtocolSender

Specified by:

setBulletinRepository in interface ProtocolListener

Parameters:

bulletinRepository - repo

requestReconnection

public ReconnectionResponseMessage requestReconnection(ReconnectionRequestMessage msg)
                                                throws ProtocolException

Description copied from interface: ClusterCoordinationProtocolSender

Sends a "reconnection request" message to a node.

Specified by:

requestReconnection in interface ClusterCoordinationProtocolSender

Parameters:

msg - a message

Returns:

the response

Throws:

ProtocolException - if communication failed

offload

public void offload(OffloadMessage msg)
             throws ProtocolException

Description copied from interface: ClusterCoordinationProtocolSender

Sends an "offload request" message to a node.

Specified by:

offload in interface ClusterCoordinationProtocolSender

Parameters:

msg - a message

Throws:

ProtocolException - if communication failed

disconnect

public void disconnect(DisconnectMessage msg)
                throws ProtocolException

Description copied from interface: ClusterCoordinationProtocolSender

Sends a "disconnection request" message to a node.

Specified by:

disconnect in interface ClusterCoordinationProtocolSender

Parameters:

msg - a message

Throws:

ProtocolException - if communication failed

notifyNodeStatusChange

public void notifyNodeStatusChange(Set<NodeIdentifier> nodesToNotify,
                                   NodeStatusChangeMessage msg)

Description copied from interface: ClusterCoordinationProtocolSender

Notifies all nodes in the given set that a node in the cluster has a new status

Specified by:

notifyNodeStatusChange in interface ClusterCoordinationProtocolSender

Parameters:

nodesToNotify - the nodes that should be notified of the change

msg - the message that indicates which node's status changed and what it changed to

requestNodeConnectionStatus

public NodeConnectionStatus requestNodeConnectionStatus(String hostname,
                                                        int port)

Description copied from interface: ClusterCoordinationProtocolSender

Sends a request to the given hostname and port to request its connection status

Specified by:

requestNodeConnectionStatus in interface ClusterCoordinationProtocolSender

Returns:

the connection status returned from the node at the given hostname & port