| /* |
| * 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 |
| * <p> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p> |
| * 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.hadoop.ozone.recon.tasks; |
| |
| import java.util.Iterator; |
| import java.util.List; |
| |
| /** |
| * Wrapper class to hold multiple OM DB update events. |
| */ |
| public class OMUpdateEventBatch { |
| |
| private final List<OMDBUpdateEvent> events; |
| |
| public OMUpdateEventBatch(List<OMDBUpdateEvent> e) { |
| events = e; |
| } |
| |
| /** |
| * Get Sequence Number and timestamp of last event in this batch. |
| * @return Event Info instance. |
| */ |
| long getLastSequenceNumber() { |
| if (events.isEmpty()) { |
| return -1; |
| } else { |
| return events.get(events.size() - 1).getSequenceNumber(); |
| } |
| } |
| |
| /** |
| * Return iterator to Event batch. |
| * @return iterator |
| */ |
| public Iterator<OMDBUpdateEvent> getIterator() { |
| return events.iterator(); |
| } |
| |
| /** |
| * Return if empty. |
| * @return true if empty, else false. |
| */ |
| public boolean isEmpty() { |
| return !getIterator().hasNext(); |
| } |
| } |