com.yahoo.prelude.cluster

Class ClusterMonitor

java.lang.Object

com.yahoo.prelude.cluster.ClusterMonitor

All Implemented Interfaces:

com.yahoo.component.provider.Freezable, Runnable

public class ClusterMonitor
extends Object
implements Runnable, com.yahoo.component.provider.Freezable

Monitors of a cluster of remote nodes. The monitor uses an internal thread for node monitoring.

Author:

bratseth, Steinar Knutsen

Field Summary

Fields

Modifier and Type	Field and Description
private MonitorConfiguration	configuration
private ScheduledFuture<?>	future
private boolean	isFrozen
private static Logger	log
private ClusterSearcher	nodeManager
private Map<VespaBackEndSearcher,NodeMonitor>	nodeMonitors A map from Node to corresponding MonitoredNode
private static int	pingThreadInitialDelayMs
private Optional<com.yahoo.container.handler.VipStatus>	vipStatus

Constructor Summary

Constructors

Constructor and Description
ClusterMonitor(ClusterSearcher manager, QrMonitorConfig monitorConfig, Optional<com.yahoo.container.handler.VipStatus> vipStatus)

Method Summary

Modifier and Type	Method and Description
(package private) void	add(VespaBackEndSearcher node) Adds a new node for monitoring.
(package private) void	failed(VespaBackEndSearcher node, ErrorMessage error) Called from ClusterSearcher/NodeManager when a node failed
void	freeze()
(package private) MonitorConfiguration	getConfiguration() Returns the configuration of this cluster monitor
private boolean	hasInformationAboutAllNodes()
private boolean	hasWorkingNodesWithDocumentsOnline()
boolean	isFrozen()
private void	ping() Ping all nodes which needs pinging to discover state changes
(package private) void	responded(VespaBackEndSearcher node, boolean hasSearchNodesOnline) Called when a node responded
void	run()
void	shutdown()
(package private) void	startPingThread()
private void	updateVipStatus()

Methods inherited from class java.lang.Object

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

Field Detail

pingThreadInitialDelayMs

private static final int pingThreadInitialDelayMs

See Also:

Constant Field Values

configuration

private final MonitorConfiguration configuration

log

private static final Logger log

nodeManager

private final ClusterSearcher nodeManager

vipStatus

private final Optional<com.yahoo.container.handler.VipStatus> vipStatus

nodeMonitors

private final Map<VespaBackEndSearcher,NodeMonitor> nodeMonitors

A map from Node to corresponding MonitoredNode

future

private ScheduledFuture<?> future

isFrozen

private boolean isFrozen

Constructor Detail

ClusterMonitor

ClusterMonitor(ClusterSearcher manager,
               QrMonitorConfig monitorConfig,
               Optional<com.yahoo.container.handler.VipStatus> vipStatus)

Method Detail

getConfiguration

MonitorConfiguration getConfiguration()

Returns the configuration of this cluster monitor

startPingThread

void startPingThread()

add

void add(VespaBackEndSearcher node)

Adds a new node for monitoring.

failed

void failed(VespaBackEndSearcher node,
            ErrorMessage error)

Called from ClusterSearcher/NodeManager when a node failed

responded

void responded(VespaBackEndSearcher node,
               boolean hasSearchNodesOnline)

Called when a node responded

updateVipStatus

private void updateVipStatus()

hasInformationAboutAllNodes

private boolean hasInformationAboutAllNodes()

hasWorkingNodesWithDocumentsOnline

private boolean hasWorkingNodesWithDocumentsOnline()

ping

private void ping()
           throws InterruptedException

Ping all nodes which needs pinging to discover state changes

Throws:

InterruptedException

run

public void run()

Specified by:

run in interface Runnable

shutdown

public void shutdown()

freeze

public void freeze()

Specified by:

freeze in interface com.yahoo.component.provider.Freezable

isFrozen

public boolean isFrozen()

Specified by:

isFrozen in interface com.yahoo.component.provider.Freezable