org.apache.nifi.cluster.protocol

Interface NodeProtocolSender

All Known Implementing Classes:

AbstractNodeProtocolSender, NodeProtocolSenderListener

public interface NodeProtocolSender

An interface for sending protocol messages from a node to the cluster manager.

Method Summary

Modifier and Type	Method and Description
ClusterWorkloadResponseMessage	clusterWorkload(ClusterWorkloadRequestMessage msg) Sends a "cluster workflow request" message to the Cluster Coordinator.
HeartbeatResponseMessage	heartbeat(HeartbeatMessage msg, String address) Sends a heartbeat to the address given
ConnectionResponseMessage	requestConnection(ConnectionRequestMessage msg) Sends a "connection request" message to the cluster manager.

Method Detail

requestConnection

ConnectionResponseMessage requestConnection(ConnectionRequestMessage msg)
                                     throws ProtocolException,
                                            UnknownServiceAddressException

Sends a "connection request" message to the cluster manager.

Parameters:

msg - a message

Returns:

the response

Throws:

UnknownServiceAddressException - if the cluster manager's address is not known

ProtocolException - if communication failed

heartbeat

HeartbeatResponseMessage heartbeat(HeartbeatMessage msg,
                                   String address)
                            throws ProtocolException

Sends a heartbeat to the address given

Parameters:

msg - the heartbeat message to send

address - the address of the Cluster Coordinator in <hostname>:<port> format

Returns:

the response from the Cluster Coordinator

Throws:

ProtocolException - if unable to send the heartbeat

clusterWorkload

ClusterWorkloadResponseMessage clusterWorkload(ClusterWorkloadRequestMessage msg)
                                        throws ProtocolException

Sends a "cluster workflow request" message to the Cluster Coordinator.

Parameters:

msg - a request message

Returns:

the response from the Cluster Coordinator

Throws:

ProtocolException - if communication failed