| /* |
| * 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 org.onosproject.store.service.AsyncAtomicCounter; |
| |
| import java.util.concurrent.CompletableFuture; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| /** |
| * 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; |
| private final MeteringAgent monitor; |
| |
| private static final String PRIMITIVE_NAME = "atomicCounter"; |
| private static final String INCREMENT_AND_GET = "incrementAndGet"; |
| private static final String GET_AND_INCREMENT = "getAndIncrement"; |
| private static final String GET_AND_ADD = "getAndAdd"; |
| private static final String ADD_AND_GET = "addAndGet"; |
| private static final String GET = "get"; |
| private static final String SET = "set"; |
| private static final String COMPARE_AND_SET = "compareAndSet"; |
| |
| public DefaultAsyncAtomicCounter(String name, |
| Database database, |
| boolean meteringEnabled) { |
| this.name = checkNotNull(name); |
| this.database = checkNotNull(database); |
| this.monitor = new MeteringAgent(PRIMITIVE_NAME, name, meteringEnabled); |
| } |
| |
| @Override |
| public CompletableFuture<Long> incrementAndGet() { |
| final MeteringAgent.Context timer = monitor.startTimer(INCREMENT_AND_GET); |
| return addAndGet(1L) |
| .whenComplete((r, e) -> timer.stop(e)); |
| } |
| |
| @Override |
| public CompletableFuture<Long> get() { |
| final MeteringAgent.Context timer = monitor.startTimer(GET); |
| return database.counterGet(name) |
| .whenComplete((r, e) -> timer.stop(e)); |
| } |
| |
| @Override |
| public CompletableFuture<Long> getAndIncrement() { |
| final MeteringAgent.Context timer = monitor.startTimer(GET_AND_INCREMENT); |
| return getAndAdd(1L) |
| .whenComplete((r, e) -> timer.stop(e)); |
| } |
| |
| @Override |
| public CompletableFuture<Long> getAndAdd(long delta) { |
| final MeteringAgent.Context timer = monitor.startTimer(GET_AND_ADD); |
| return database.counterGetAndAdd(name, delta) |
| .whenComplete((r, e) -> timer.stop(e)); |
| } |
| |
| @Override |
| public CompletableFuture<Long> addAndGet(long delta) { |
| final MeteringAgent.Context timer = monitor.startTimer(ADD_AND_GET); |
| return database.counterAddAndGet(name, delta) |
| .whenComplete((r, e) -> timer.stop(e)); |
| } |
| |
| @Override |
| public CompletableFuture<Void> set(long value) { |
| final MeteringAgent.Context timer = monitor.startTimer(SET); |
| return database.counterSet(name, value) |
| .whenComplete((r, e) -> timer.stop(e)); |
| } |
| |
| @Override |
| public CompletableFuture<Boolean> compareAndSet(long expectedValue, long updateValue) { |
| final MeteringAgent.Context timer = monitor.startTimer(COMPARE_AND_SET); |
| return database.counterCompareAndSet(name, expectedValue, updateValue) |
| .whenComplete((r, e) -> timer.stop(e)); |
| } |
| } |