| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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.apache.ignite.internal.processors.cache; |
| |
| import java.util.UUID; |
| import java.util.concurrent.atomic.AtomicReferenceFieldUpdater; |
| import org.apache.ignite.internal.IgniteInternalFuture; |
| import org.apache.ignite.internal.util.future.GridFinishedFuture; |
| import org.apache.ignite.internal.util.future.GridFutureAdapter; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * Provides initialized GridCacheReturn. |
| */ |
| public class GridCacheReturnCompletableWrapper { |
| /** Completable wrapper upd. */ |
| private static final AtomicReferenceFieldUpdater<GridCacheReturnCompletableWrapper, Object> COMPLETABLE_WRAPPER_UPD = |
| AtomicReferenceFieldUpdater.newUpdater(GridCacheReturnCompletableWrapper.class, Object.class, "o"); |
| |
| /** */ |
| private volatile Object o; |
| |
| /** Node id. */ |
| private final UUID nodeId; |
| |
| /** |
| * @param nodeId Node id. |
| */ |
| public GridCacheReturnCompletableWrapper(UUID nodeId) { |
| this.nodeId = nodeId; |
| } |
| |
| /** |
| * @return ID of node initiated tx or {@code null} if this node is local. |
| */ |
| @Nullable public UUID nodeId() { |
| return nodeId; |
| } |
| |
| /** |
| * Marks as initialized. |
| * |
| * @param ret Return. |
| */ |
| public void initialize(GridCacheReturn ret) { |
| final Object obj = this.o; |
| |
| if (obj == null) { |
| boolean res = COMPLETABLE_WRAPPER_UPD.compareAndSet(this, null, ret); |
| |
| if (!res) |
| initialize(ret); |
| } |
| else if (obj instanceof GridFutureAdapter) { |
| ((GridFutureAdapter)obj).onDone(ret); |
| |
| boolean res = COMPLETABLE_WRAPPER_UPD.compareAndSet(this, obj, ret); |
| |
| assert res; |
| } |
| else |
| throw new IllegalStateException("GridCacheReturnCompletableWrapper can't be reinitialized"); |
| } |
| |
| /** |
| * Allows wait for properly initialized value. |
| */ |
| public IgniteInternalFuture<GridCacheReturn> fut() { |
| final Object obj = this.o; |
| |
| if (obj instanceof GridCacheReturn) |
| return new GridFinishedFuture<>((GridCacheReturn)obj); |
| else if (obj instanceof IgniteInternalFuture) |
| return (IgniteInternalFuture)obj; |
| else if (obj == null) { |
| boolean res = COMPLETABLE_WRAPPER_UPD.compareAndSet(this, null, new GridFutureAdapter<>()); |
| |
| if (res) |
| return (IgniteInternalFuture)this.o; |
| else |
| return fut(); |
| } |
| else |
| throw new IllegalStateException(); |
| } |
| } |