hudson.slaves

Class CloudSlaveRetentionStrategy<T extends Computer>

java.lang.Object

hudson.model.AbstractDescribableImpl<RetentionStrategy<?>>

hudson.slaves.RetentionStrategy<T>

hudson.slaves.CloudSlaveRetentionStrategy<T>

All Implemented Interfaces:

ExtensionPoint, Describable<RetentionStrategy<?>>

public class CloudSlaveRetentionStrategy<T extends Computer>
extends RetentionStrategy<T>

Default convenience implementation of RetentionStrategy for slaves provisioned from Cloud. If a slave is idle for 10 mins, this retention strategy will remove the slave. This can be used as-is for a Node provisioned by cloud to implement the auto-scaling semantics, it can be subtyped to tweak the behavior, or it can be used as an example.

TODO CloudRetentionStrategy seems to be a better implementation.

Since:

1.510

Author:

Kohsuke Kawaguchi

Nested Class Summary

Nested classes/interfaces inherited from class hudson.slaves.RetentionStrategy

RetentionStrategy.Always, RetentionStrategy.Demand

Nested classes/interfaces inherited from interface hudson.ExtensionPoint

ExtensionPoint.LegacyInstancesAreScopedToHudson

Field Summary

Fields

Modifier and Type	Field and Description
static long	TIMEOUT

Fields inherited from class hudson.slaves.RetentionStrategy

INSTANCE, LIST, NOOP

Constructor Summary

Constructors

Constructor and Description
CloudSlaveRetentionStrategy()

Method Summary

Modifier and Type	Method and Description
long	check(T c) This method will be called periodically to allow this strategy to decide what to do with it's owning slave.
protected long	checkCycle() When do we check again next time?
protected long	getIdleMaxTime() If the computer has been idle longer than this time, we'll kill the slave.
protected boolean	isIdleForTooLong(T c) Has this computer been idle for too long?
protected void	kill(Node n) Remove the node.

Methods inherited from class hudson.slaves.RetentionStrategy

all, isAcceptingTasks, isManualLaunchAllowed, start

Methods inherited from class hudson.model.AbstractDescribableImpl

getDescriptor

Methods inherited from class java.lang.Object

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

Field Detail

TIMEOUT

public static long TIMEOUT

Constructor Detail

CloudSlaveRetentionStrategy

public CloudSlaveRetentionStrategy()

Method Detail

check

public long check(T c)

Description copied from class: RetentionStrategy

This method will be called periodically to allow this strategy to decide what to do with it's owning slave.

Specified by:

check in class RetentionStrategy<T extends Computer>

Parameters:

c - Computer for which this strategy is assigned. This computer may be online or offline. This object also exposes a bunch of properties that the callee can use to decide what action to take.

Returns:

The number of minutes after which the strategy would like to be checked again. The strategy may be rechecked earlier or later that this!

kill

protected void kill(Node n)
             throws IOException

Remove the node.

To actually deallocate the resource tied to this Node, implement Computer.onRemoved().

Throws:

IOException

checkCycle

protected long checkCycle()

When do we check again next time?

isIdleForTooLong

protected boolean isIdleForTooLong(T c)

Has this computer been idle for too long?

getIdleMaxTime

protected long getIdleMaxTime()

If the computer has been idle longer than this time, we'll kill the slave.