org.apache.nifi.cluster.protocol.impl

Class NodeProtocolSenderListener

java.lang.Object

org.apache.nifi.cluster.protocol.impl.NodeProtocolSenderListener

All Implemented Interfaces:

NodeProtocolSender, ProtocolListener

public class NodeProtocolSenderListener
extends Object
implements NodeProtocolSender, ProtocolListener

Field Summary

Fields

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

Constructor Summary

Constructors

Constructor and Description
NodeProtocolSenderListener(NodeProtocolSender sender, ProtocolListener listener)

Method Summary

Modifier and Type	Method and Description
void	addHandler(ProtocolHandler handler) Registers a handler with the listener.
ClusterWorkloadResponseMessage	clusterWorkload(ClusterWorkloadRequestMessage msg) Sends a "cluster workflow request" message to the Cluster Coordinator.
Collection<ProtocolHandler>	getHandlers()
HeartbeatResponseMessage	heartbeat(HeartbeatMessage msg, String address) Sends a heartbeat to the address given
boolean	isRunning()
boolean	removeHandler(ProtocolHandler handler) Unregisters the handler with the listener.
ConnectionResponseMessage	requestConnection(ConnectionRequestMessage msg, boolean allowConnectToSelf) Sends a "connection request" message to the cluster manager.
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 NodeProtocolSender sender

listener

private final ProtocolListener listener

Constructor Detail

NodeProtocolSenderListener

public NodeProtocolSenderListener(NodeProtocolSender 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

requestConnection

public ConnectionResponseMessage requestConnection(ConnectionRequestMessage msg,
                                                   boolean allowConnectToSelf)
                                            throws ProtocolException,
                                                   UnknownServiceAddressException

Description copied from interface: NodeProtocolSender

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

Specified by:

requestConnection in interface NodeProtocolSender

Parameters:

msg - a message

allowConnectToSelf - whether or not the node should be allowed to connect to the cluster if the Cluster Coordinator is this node

Returns:

the response

Throws:

ProtocolException - if communication failed

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

setBulletinRepository

public void setBulletinRepository(BulletinRepository bulletinRepository)

Description copied from interface: ProtocolListener

Sets the BulletinRepository that can be used to report bulletins

Specified by:

setBulletinRepository in interface ProtocolListener

Parameters:

bulletinRepository - repo

heartbeat

public HeartbeatResponseMessage heartbeat(HeartbeatMessage msg,
                                          String address)
                                   throws ProtocolException

Description copied from interface: NodeProtocolSender

Sends a heartbeat to the address given

Specified by:

heartbeat in interface NodeProtocolSender

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

public ClusterWorkloadResponseMessage clusterWorkload(ClusterWorkloadRequestMessage msg)
                                               throws ProtocolException

Description copied from interface: NodeProtocolSender

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

Specified by:

clusterWorkload in interface NodeProtocolSender

Parameters:

msg - a request message

Returns:

the response from the Cluster Coordinator

Throws:

ProtocolException - if communication failed