SingletonService (Java API Reference for Oracle WebLogic Server)

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Oracle Fusion Middleware
Java API Reference for Oracle WebLogic Server
12c (12.2.1)

Part Number E55141-01
P4 Change 1723563 on 2015/10/09

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weblogic.cluster.singleton
Interface SingletonService

public interface SingletonService

This interface defines a stateless lightweight singleton service that has the following contract:

Activate is invoked on one and only one server in a cluster
Deactivate can be called anytime after activate is called. The sequence of operations is : activate -> deactivate -> activate on another server in the cluster.
Any exceptions thrown during deactivate will be ignored and the service will be activated elsewhere

Method Summary
`abstract void`	`activate()` Activate the service in this server.
`abstract void`	`deactivate()` Deactivate the service on this server.

Method Detail

activate

void activate()

Activate the service in this server. Perform setup operations needed for this service to function on this server. If activate throws any RuntimeException, the service will be activated in another server if possible.

deactivate

void deactivate()

Deactivate the service on this server. Relinquish ownership over resources so that it can be claimed by another server where activate will be called. Any RuntimeExceptions thrown by deactivate will be ignored and activate will be attempted elsewhere.

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