org.apache.nifi.cluster.protocol

Interface ClusterCoordinationProtocolSender

All Known Implementing Classes:

ClusterCoordinationProtocolSenderListener, StandardClusterCoordinationProtocolSender

public interface ClusterCoordinationProtocolSender

An interface for sending protocol messages from the cluster coordinator to nodes.

Method Summary

Modifier and Type	Method and Description
void	disconnect(DisconnectMessage msg) Sends a "disconnection request" message to a node.
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.
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

Method Detail

requestReconnection

ReconnectionResponseMessage requestReconnection(ReconnectionRequestMessage msg)
                                         throws ProtocolException

Sends a "reconnection request" message to a node.

Parameters:

msg - a message

Returns:

the response

Throws:

ProtocolException - if communication failed

offload

void offload(OffloadMessage msg)
      throws ProtocolException

Sends an "offload request" message to a node.

Parameters:

msg - a message

Throws:

ProtocolException - if communication failed

disconnect

void disconnect(DisconnectMessage msg)
         throws ProtocolException

Sends a "disconnection request" message to a node.

Parameters:

msg - a message

Throws:

ProtocolException - if communication failed

setBulletinRepository

void setBulletinRepository(BulletinRepository bulletinRepository)

Sets the BulletinRepository that can be used to report bulletins

Parameters:

bulletinRepository - repo

notifyNodeStatusChange

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

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

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

NodeConnectionStatus requestNodeConnectionStatus(String hostname,
                                                 int port)

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

Returns:

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