org.apache.nifi.cluster.protocol.impl

Class StandardClusterCoordinationProtocolSender

java.lang.Object

org.apache.nifi.cluster.protocol.impl.StandardClusterCoordinationProtocolSender

All Implemented Interfaces:

ClusterCoordinationProtocolSender

public class StandardClusterCoordinationProtocolSender
extends Object
implements ClusterCoordinationProtocolSender

A protocol sender for sending protocol messages from the cluster manager to nodes. Connection-type requests (e.g., reconnection, disconnection) by nature of starting/stopping flow controllers take longer than other types of protocol messages. Therefore, a handshake timeout may be specified to lengthen the allowable time for communication with the node.

Field Summary

Fields

Modifier and Type	Field and Description
private int	handshakeTimeoutSeconds
private static org.slf4j.Logger	logger
private int	maxThreadsPerRequest
private ProtocolContext<ProtocolMessage>	protocolContext
private SocketConfiguration	socketConfiguration

Constructor Summary

Constructors

Constructor and Description
StandardClusterCoordinationProtocolSender(SocketConfiguration socketConfiguration, ProtocolContext<ProtocolMessage> protocolContext, int maxThreadsPerRequest)

Method Summary

Modifier and Type	Method and Description
private Socket	createSocket(NodeIdentifier nodeId, boolean applyHandshakeTimeout)
private Socket	createSocket(String host, int port, boolean applyHandshakeTimeout)
void	disconnect(DisconnectMessage msg) Requests a node to disconnect from the cluster.
int	getHandshakeTimeoutSeconds()
SocketConfiguration	getSocketConfiguration()
void	notifyNodeStatusChange(Set<NodeIdentifier> nodesToNotify, NodeStatusChangeMessage msg) Notifies all nodes in the given set that a node in the cluster has a new status
NodeConnectionStatus	requestNodeConnectionStatus(String hostname, int port) Sends a request to the given hostname and port to request its connection status
ReconnectionResponseMessage	requestReconnection(ReconnectionRequestMessage msg) Requests a node to reconnect to the cluster.
void	setBulletinRepository(BulletinRepository bulletinRepository) Sets the BulletinRepository that can be used to report bulletins
private void	setConnectionHandshakeTimeoutOnSocket(Socket socket)
void	setHandshakeTimeout(String handshakeTimeout)

Methods inherited from class java.lang.Object

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

Field Detail

logger

private static final org.slf4j.Logger logger

protocolContext

private final ProtocolContext<ProtocolMessage> protocolContext

socketConfiguration

private final SocketConfiguration socketConfiguration

maxThreadsPerRequest

private final int maxThreadsPerRequest

handshakeTimeoutSeconds

private int handshakeTimeoutSeconds

Constructor Detail

StandardClusterCoordinationProtocolSender

public StandardClusterCoordinationProtocolSender(SocketConfiguration socketConfiguration,
                                                 ProtocolContext<ProtocolMessage> protocolContext,
                                                 int maxThreadsPerRequest)

Method Detail

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

Parameters:

bulletinRepository - repo

requestReconnection

public ReconnectionResponseMessage requestReconnection(ReconnectionRequestMessage msg)
                                                throws ProtocolException

Requests a node to reconnect to the cluster. The configured value for handshake timeout is applied to the socket before making the request.

Specified by:

requestReconnection in interface ClusterCoordinationProtocolSender

Parameters:

msg - a message

Returns:

the response

Throws:

ProtocolException - if the message failed to be sent or the response was malformed

disconnect

public void disconnect(DisconnectMessage msg)
                throws ProtocolException

Requests a node to disconnect from the cluster. The configured value for handshake timeout is applied to the socket before making the request.

Specified by:

disconnect in interface ClusterCoordinationProtocolSender

Parameters:

msg - a message

Throws:

ProtocolException - if the message failed to be sent

setConnectionHandshakeTimeoutOnSocket

private void setConnectionHandshakeTimeoutOnSocket(Socket socket)
                                            throws SocketException

Throws:

SocketException

getSocketConfiguration

public SocketConfiguration getSocketConfiguration()

getHandshakeTimeoutSeconds

public int getHandshakeTimeoutSeconds()

setHandshakeTimeout

public void setHandshakeTimeout(String handshakeTimeout)

createSocket

private Socket createSocket(NodeIdentifier nodeId,
                            boolean applyHandshakeTimeout)

createSocket

private Socket createSocket(String host,
                            int port,
                            boolean applyHandshakeTimeout)

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

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