Madan Jampani | 2914e4e | 2016-09-13 17:48:56 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2016-present Open Networking Laboratory |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package org.onosproject.store.primitives.impl; |
| 18 | |
| 19 | import java.util.Map; |
| 20 | import java.util.concurrent.CompletableFuture; |
| 21 | |
| 22 | import org.onosproject.store.service.AsyncDocumentTree; |
| 23 | import org.onosproject.store.service.DocumentPath; |
| 24 | import org.onosproject.store.service.DocumentTreeEvent; |
| 25 | import org.onosproject.store.service.DocumentTreeListener; |
| 26 | import org.onosproject.store.service.Serializer; |
| 27 | import org.onosproject.store.service.Versioned; |
| 28 | |
| 29 | import com.google.common.collect.Maps; |
| 30 | |
| 31 | /** |
| 32 | * Default implementation of {@link AsyncDocumentTree}. |
| 33 | * <p> |
| 34 | * This implementation delegates execution to a backing tree implemented on top of Atomix framework. |
| 35 | * |
Madan Jampani | 2914e4e | 2016-09-13 17:48:56 -0700 | [diff] [blame] | 36 | * @param <V> tree node value type. |
| 37 | */ |
| 38 | public class DefaultDistributedDocumentTree<V> implements AsyncDocumentTree<V> { |
| 39 | |
| 40 | private final String name; |
| 41 | private final AsyncDocumentTree<byte[]> backingTree; |
| 42 | private final Serializer serializer; |
| 43 | private final Map<DocumentTreeListener<V>, InternalBackingDocumentTreeListener> listeners = |
| 44 | Maps.newIdentityHashMap(); |
| 45 | |
| 46 | DefaultDistributedDocumentTree(String name, AsyncDocumentTree<byte[]> backingTree, Serializer serializer) { |
| 47 | this.name = name; |
| 48 | this.backingTree = backingTree; |
| 49 | this.serializer = serializer; |
| 50 | } |
| 51 | |
| 52 | @Override |
| 53 | public String name() { |
| 54 | return name; |
| 55 | } |
| 56 | |
| 57 | @Override |
| 58 | public Type primitiveType() { |
| 59 | return backingTree.primitiveType(); |
| 60 | } |
| 61 | |
| 62 | @Override |
| 63 | public DocumentPath root() { |
| 64 | return backingTree.root(); |
| 65 | } |
| 66 | |
| 67 | @Override |
| 68 | public CompletableFuture<Map<String, Versioned<V>>> getChildren(DocumentPath path) { |
| 69 | return backingTree.getChildren(path) |
| 70 | .thenApply(map -> Maps.transformValues(map, v -> v.map(serializer::decode))); |
| 71 | } |
| 72 | |
| 73 | @Override |
| 74 | public CompletableFuture<Versioned<V>> get(DocumentPath path) { |
| 75 | return backingTree.get(path) |
| 76 | .thenApply(v -> v == null ? null : v.map(serializer::decode)); |
| 77 | } |
| 78 | |
| 79 | @Override |
| 80 | public CompletableFuture<Versioned<V>> set(DocumentPath path, V value) { |
| 81 | return backingTree.set(path, serializer.encode(value)) |
| 82 | .thenApply(v -> v == null ? null : v.map(serializer::decode)); |
| 83 | } |
| 84 | |
| 85 | @Override |
| 86 | public CompletableFuture<Boolean> create(DocumentPath path, V value) { |
| 87 | return backingTree.create(path, serializer.encode(value)); |
| 88 | } |
| 89 | |
| 90 | @Override |
Madan Jampani | 8698328 | 2016-09-15 14:55:48 -0700 | [diff] [blame] | 91 | public CompletableFuture<Boolean> createRecursive(DocumentPath path, V value) { |
| 92 | return backingTree.createRecursive(path, serializer.encode(value)); |
| 93 | } |
| 94 | |
| 95 | @Override |
Madan Jampani | 2914e4e | 2016-09-13 17:48:56 -0700 | [diff] [blame] | 96 | public CompletableFuture<Boolean> replace(DocumentPath path, V newValue, long version) { |
| 97 | return backingTree.replace(path, serializer.encode(newValue), version); |
| 98 | } |
| 99 | |
| 100 | @Override |
| 101 | public CompletableFuture<Boolean> replace(DocumentPath path, V newValue, V currentValue) { |
| 102 | return backingTree.replace(path, serializer.encode(newValue), serializer.encode(currentValue)); |
| 103 | } |
| 104 | |
| 105 | @Override |
| 106 | public CompletableFuture<Versioned<V>> removeNode(DocumentPath path) { |
| 107 | return backingTree.removeNode(path) |
| 108 | .thenApply(v -> v == null ? null : v.map(serializer::decode)); |
| 109 | } |
| 110 | |
| 111 | @Override |
| 112 | public CompletableFuture<Void> addListener(DocumentPath path, DocumentTreeListener<V> listener) { |
| 113 | synchronized (listeners) { |
| 114 | InternalBackingDocumentTreeListener backingListener = |
| 115 | listeners.computeIfAbsent(listener, k -> new InternalBackingDocumentTreeListener(listener)); |
| 116 | return backingTree.addListener(path, backingListener); |
| 117 | } |
| 118 | } |
| 119 | |
| 120 | @Override |
| 121 | public CompletableFuture<Void> removeListener(DocumentTreeListener<V> listener) { |
| 122 | synchronized (listeners) { |
| 123 | InternalBackingDocumentTreeListener backingListener = listeners.remove(listener); |
| 124 | if (backingListener != null) { |
| 125 | return backingTree.removeListener(backingListener); |
| 126 | } else { |
| 127 | return CompletableFuture.completedFuture(null); |
| 128 | } |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | private class InternalBackingDocumentTreeListener implements DocumentTreeListener<byte[]> { |
| 133 | |
| 134 | private final DocumentTreeListener<V> listener; |
| 135 | |
| 136 | InternalBackingDocumentTreeListener(DocumentTreeListener<V> listener) { |
| 137 | this.listener = listener; |
| 138 | } |
| 139 | |
| 140 | @Override |
| 141 | public void event(DocumentTreeEvent<byte[]> event) { |
| 142 | listener.event(new DocumentTreeEvent<V>(event.path(), |
| 143 | event.type(), |
| 144 | event.newValue().map(v -> v.map(serializer::decode)), |
| 145 | event.oldValue().map(v -> v.map(serializer::decode)))); |
| 146 | } |
| 147 | } |
| 148 | } |