Package hudson.node_monitors

Class NodeMonitor

java.lang.Object

hudson.node_monitors.NodeMonitor

All Implemented Interfaces:

ExtensionPoint, Describable<NodeMonitor>

Direct Known Subclasses:

AbstractDiskSpaceMonitor, ArchitectureMonitor, ClockMonitor, ResponseTimeMonitor, SwapSpaceMonitor

@ExportedBean
public abstract class NodeMonitor
extends Object
implements ExtensionPoint, Describable<NodeMonitor>

Extension point for managing and monitoring Nodes.

Views

column.jelly

Invoked from ComputerSet index.jelly to render a column. The NodeMonitor instance is accessible through the "from" variable. Also see getColumnCaption().

config.jelly (optional)

Configuration fragment to be displayed in http://server/hudson/computer/configure. Used for configuring the threshold for taking nodes offline.

Persistence

NodeMonitors are persisted via XStream.

Since:

1.123

Author:

Kohsuke Kawaguchi

Nested Class Summary

Nested classes/interfaces inherited from interface hudson.ExtensionPoint

ExtensionPoint.LegacyInstancesAreScopedToHudson

Field Summary

Fields

Modifier and Type	Field	Description
static DescriptorList<NodeMonitor>	LIST	Deprecated. as of 1.286.

Constructor Summary

Constructors

Constructor	Description
NodeMonitor()

Method Summary

Modifier and Type	Method	Description
static DescriptorExtensionList<NodeMonitor,Descriptor<NodeMonitor>>	all()	Returns all the registered NodeMonitor descriptors.
Object	data(Computer c)	Obtains the monitoring result currently available, or null if no data is available.
static List<NodeMonitor>	getAll()	Obtains all the instances of NodeMonitors that are alive.
String	getColumnCaption()	Returns the name of the column to be added to ComputerSet index.jelly.
AbstractNodeMonitorDescriptor<?>	getDescriptor()	Gets the descriptor for this instance.
boolean	isIgnored()	True if this monitoring shouldn't mark the agents offline.
void	setIgnored(boolean ignored)
Thread	triggerUpdate()	Starts updating the data asynchronously.

Methods inherited from class java.lang.Object

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

Field Detail

LIST

@Deprecated
public static final DescriptorList<NodeMonitor> LIST

Deprecated.

as of 1.286. Use all() for read access and Extension for registration.

All registered NodeMonitors.

Constructor Detail

NodeMonitor

public NodeMonitor()

Method Detail

getColumnCaption

@Exported
@CheckForNull
public String getColumnCaption()

Returns the name of the column to be added to ComputerSet index.jelly.

Returns:

null to not render a column. The convention is to use capitalization like "Foo Bar Zot".

getDescriptor

public AbstractNodeMonitorDescriptor<?> getDescriptor()

Description copied from interface: Describable

Gets the descriptor for this instance.

Descriptor is a singleton for every concrete Describable implementation, so if a.getClass() == b.getClass() then by default a.getDescriptor() == b.getDescriptor() as well. (In rare cases a single implementation class may be used for instances with distinct descriptors.)

Specified by:

getDescriptor in interface Describable<NodeMonitor>

data

public Object data(Computer c)

Obtains the monitoring result currently available, or null if no data is available.

triggerUpdate

public Thread triggerUpdate()

Starts updating the data asynchronously. If there's any previous updating activity going on, it'll be interrupted and aborted.

Returns:

Thread object that carries out the update operation. You can use this to interrupt the execution or waits for the completion. Always non-null

Since:

1.232

getAll

public static List<NodeMonitor> getAll()

Obtains all the instances of NodeMonitors that are alive.

Since:

1.187

isIgnored

public boolean isIgnored()

True if this monitoring shouldn't mark the agents offline.

Many NodeMonitors implement a logic that if the value goes above/below a threshold, the agent will be marked offline as a preventive measure. This flag controls that.

Unlike Publisher, where the absence of an instance indicates that it's disengaged, in NodeMonitor this boolean flag is used to indicate the disengagement, so that monitors work in opt-out basis.

setIgnored

public void setIgnored(boolean ignored)

all

public static DescriptorExtensionList<NodeMonitor,Descriptor<NodeMonitor>> all()

Returns all the registered NodeMonitor descriptors.