| /* |
| * 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.beam.sdk.io.hcatalog; |
| |
| import java.util.List; |
| import java.util.stream.Collectors; |
| import java.util.stream.IntStream; |
| import org.apache.beam.sdk.io.hcatalog.HCatalogIO.Read; |
| import org.apache.beam.sdk.transforms.Watch.Growth.PollFn; |
| import org.apache.beam.sdk.transforms.Watch.Growth.PollResult; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hive.metastore.IMetaStoreClient; |
| import org.joda.time.Instant; |
| |
| /** Return the list of current partitions present. */ |
| class PartitionPollerFn extends PollFn<Read, Integer> { |
| private transient IMetaStoreClient metaStoreClient; |
| |
| @Override |
| public PollResult<Integer> apply(Read element, Context c) throws Exception { |
| final Configuration conf = HCatalogUtils.createConfiguration(element.getConfigProperties()); |
| metaStoreClient = HCatalogUtils.createMetaStoreClient(conf); |
| final Instant now = Instant.now(); |
| final PollResult<Integer> pollResult = |
| PollResult.incomplete(now, getPartitionIndices(element)).withWatermark(now); |
| if (metaStoreClient != null) { |
| metaStoreClient.close(); |
| } |
| return pollResult; |
| } |
| |
| private List<Integer> getPartitionIndices(Read read) throws Exception { |
| return IntStream.range( |
| 0, |
| metaStoreClient |
| .listPartitions(read.getDatabase(), read.getTable(), Short.MAX_VALUE) |
| .size()) |
| .boxed() |
| .collect(Collectors.toList()); |
| } |
| } |