+++ /dev/null
-/*
- * Copyright (c) 2016 Cisco Systems, Inc. and others. All rights reserved.
- *
- * This program and the accompanying materials are made available under the
- * terms of the Eclipse Public License v1.0 which accompanies this distribution,
- * and is available at http://www.eclipse.org/legal/epl-v10.html
- */
-package org.opendaylight.mdsal.singleton.common.api;
-
-import org.opendaylight.yangtools.concepts.Registration;
-
-/**
- * {@link ClusterSingletonServiceProvider} provides a functionality to register and group services
- * {@link ClusterSingletonService} by service group identifier. Services could be Applications or RPCs.
- * Provider provides a functionality which allows to have only one fully instantiated service instance
- * in a cluster at one time and service group means to have all service instances for the same group
- * situated on same Cluster Node. This is realized via a double candidate approach where a service
- * group instance maintains a candidate registration for ownership of the service group entity in the
- * cluster and also a registration that acts as a guard to ensure a service group instance has fully
- * closed prior to relinquishing service group ownership. To achieve ownership of the service group,
- * a service group candidate must hold ownership of both these entities.
- */
-public interface ClusterSingletonServiceProvider {
- /**
- * Method registers {@link ClusterSingletonService} to Provider.
- * Method returns {@link java.lang.RuntimeException} for unexpected state, so be careful with implementation.
- * Note: RuntimeException is implemented as a notification about some problems with registration and client
- * has to implement some strategy for handling this issue.
- * TODO: RuntimeException is not a transparent contract for handling unexpected state and it needs to be
- * replaced with a specific documented Exception or it needs to add another contract definition for a client
- * notification about the unexpected state reason in {@link ClusterSingletonService}.
- * RuntimeException implementation is a hotfix for an unwanted API contract changes in boron release only.
- *
- * @param service ClusterSingletonService instance
- * @return {@link Registration} registration
- */
- Registration registerClusterSingletonService(ClusterSingletonService service);
-}