| /* |
| * 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.hugegraph.traversal.algorithm.records.record; |
| |
| import org.apache.hugegraph.util.collection.IntIterator; |
| |
| public class SyncRecord implements Record { |
| |
| private final Object lock; |
| private final Record record; |
| |
| public SyncRecord(Record record) { |
| this(record, null); |
| } |
| |
| public SyncRecord(Record record, Object newLock) { |
| if (record == null) { |
| throw new IllegalArgumentException( |
| "Cannot create a SyncRecord on a null record"); |
| } else { |
| this.record = record; |
| this.lock = newLock == null ? this : newLock; |
| } |
| } |
| |
| @Override |
| public IntIterator keys() { |
| /* |
| * Another threads call addPath() will change IntIterator inner array, |
| * but in kout/kneighbor scenario it's ok because keys() and addPath() |
| * won't be called simultaneously on same Record. |
| */ |
| synchronized (this.lock) { |
| return this.record.keys(); |
| } |
| } |
| |
| @Override |
| public boolean containsKey(int key) { |
| synchronized (this.lock) { |
| return this.record.containsKey(key); |
| } |
| } |
| |
| @Override |
| public IntIterator get(int key) { |
| synchronized (this.lock) { |
| return this.record.get(key); |
| } |
| } |
| |
| @Override |
| public void addPath(int node, int parent) { |
| synchronized (this.lock) { |
| this.record.addPath(node, parent); |
| } |
| } |
| |
| @Override |
| public int size() { |
| synchronized (this.lock) { |
| return this.record.size(); |
| } |
| } |
| |
| @Override |
| public boolean concurrent() { |
| return true; |
| } |
| } |