com.netflix.eureka.resources

Class ASGResource

java.lang.Object

com.netflix.eureka.resources.ASGResource

public class ASGResource
extends java.lang.Object

A jersey resource for handling updates to ASGResource.ASGStatus.

The ASG status is used in AWS environments to automatically enable/disable instance registration based on the status of the ASG. This is particularly useful in red/black deployment scenarios where it is easy to switch to a new version and incase of problems switch back to the old versions of the deployment.

During such a scenario, when an ASG is disabled and the instances go away and get refilled by an ASG - which is normal in AWS environments,the instances automatically go in the InstanceInfo.InstanceStatus.OUT_OF_SERVICE state when they are refilled by the ASG and if the ASG is disabled by as indicated by a flag in the ASG as described in AwsAsgUtil.isASGEnabled(com.netflix.appinfo.InstanceInfo)

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ASGResource.ASGStatus

Field Summary

Fields

Modifier and Type	Field and Description
protected AwsAsgUtil	awsAsgUtil
protected PeerAwareInstanceRegistry	registry

Constructor Summary

Constructors

Constructor and Description
ASGResource()

Method Summary

Modifier and Type	Method and Description
javax.ws.rs.core.Response	statusUpdate(java.lang.String asgName, java.lang.String newStatus, java.lang.String isReplication) Changes the status information of the ASG.

Methods inherited from class java.lang.Object

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

Field Detail

registry

protected final PeerAwareInstanceRegistry registry

awsAsgUtil

protected final AwsAsgUtil awsAsgUtil

Constructor Detail

ASGResource

public ASGResource()

Method Detail

statusUpdate

public javax.ws.rs.core.Response statusUpdate(java.lang.String asgName,
                                              java.lang.String newStatus,
                                              @HeaderParam(value="x-netflix-discovery-replication")
                                              java.lang.String isReplication)

Changes the status information of the ASG.

Parameters:

asgName - the name of the ASG for which the status needs to be changed.

newStatus - the new status ASGResource.ASGStatus of the ASG.

isReplication - a header parameter containing information whether this is replicated from other nodes.

Returns:

response which indicates if the operation succeeded or not.