| /* |
| * Copyright 2014 Open Networking Laboratory |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.onosproject.store; |
| |
| import org.onosproject.event.Event; |
| |
| /** |
| * Abstraction of a entity capable of storing and/or distributing information |
| * across a cluster. |
| */ |
| public interface Store<E extends Event, D extends StoreDelegate<E>> { |
| |
| /** |
| * Sets the delegate on the store. |
| * |
| * @param delegate new store delegate |
| * @throws java.lang.IllegalStateException if a delegate is already |
| * currently set on the store and is a different one that |
| */ |
| void setDelegate(D delegate); |
| |
| /** |
| * Withdraws the delegate from the store. |
| * |
| * @param delegate store delegate to withdraw |
| * @throws java.lang.IllegalArgumentException if the delegate is not |
| * currently set on the store |
| */ |
| void unsetDelegate(D delegate); |
| |
| /** |
| * Indicates whether the store has a delegate. |
| * |
| * @return true if delegate is set |
| */ |
| boolean hasDelegate(); |
| |
| } |