| /* |
| * Copyright 2015 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.consistent.impl; |
| |
| import java.util.concurrent.CompletableFuture; |
| |
| import org.onosproject.store.service.AsyncAtomicCounter; |
| |
| import static com.google.common.base.Preconditions.*; |
| |
| /** |
| * Default implementation for a distributed AsyncAtomicCounter backed by |
| * partitioned Raft DB. |
| * <p> |
| * The initial value will be zero. |
| */ |
| public class DefaultAsyncAtomicCounter implements AsyncAtomicCounter { |
| |
| private final String name; |
| private final Database database; |
| |
| public DefaultAsyncAtomicCounter(String name, Database database) { |
| this.name = checkNotNull(name); |
| this.database = checkNotNull(database); |
| } |
| |
| @Override |
| public CompletableFuture<Long> incrementAndGet() { |
| return addAndGet(1L); |
| } |
| |
| @Override |
| public CompletableFuture<Long> get() { |
| return database.counterGet(name); |
| } |
| |
| @Override |
| public CompletableFuture<Long> getAndIncrement() { |
| return getAndAdd(1L); |
| } |
| |
| @Override |
| public CompletableFuture<Long> getAndAdd(long delta) { |
| return database.counterGetAndAdd(name, delta); |
| } |
| |
| @Override |
| public CompletableFuture<Long> addAndGet(long delta) { |
| return database.counterAddAndGet(name, delta); |
| } |
| } |