| /* |
| * 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.kinesis; |
| |
| import static org.apache.beam.vendor.guava.v20_0.com.google.common.base.Preconditions.checkNotNull; |
| |
| import com.amazonaws.services.kinesis.model.Shard; |
| import java.util.Set; |
| import java.util.stream.Collectors; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Creates {@link KinesisReaderCheckpoint}, which spans over all shards in given stream. List of |
| * shards is obtained dynamically on call to {@link #generate(SimplifiedKinesisClient)}. |
| */ |
| class DynamicCheckpointGenerator implements CheckpointGenerator { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(DynamicCheckpointGenerator.class); |
| private final String streamName; |
| private final StartingPoint startingPoint; |
| private final StartingPointShardsFinder startingPointShardsFinder; |
| |
| public DynamicCheckpointGenerator(String streamName, StartingPoint startingPoint) { |
| this.streamName = streamName; |
| this.startingPoint = startingPoint; |
| this.startingPointShardsFinder = new StartingPointShardsFinder(); |
| } |
| |
| public DynamicCheckpointGenerator( |
| String streamName, |
| StartingPoint startingPoint, |
| StartingPointShardsFinder startingPointShardsFinder) { |
| this.streamName = checkNotNull(streamName, "streamName"); |
| this.startingPoint = checkNotNull(startingPoint, "startingPoint"); |
| this.startingPointShardsFinder = |
| checkNotNull(startingPointShardsFinder, "startingPointShardsFinder"); |
| } |
| |
| @Override |
| public KinesisReaderCheckpoint generate(SimplifiedKinesisClient kinesis) |
| throws TransientKinesisException { |
| Set<Shard> shardsAtStartingPoint = |
| startingPointShardsFinder.findShardsAtStartingPoint(kinesis, streamName, startingPoint); |
| LOG.info( |
| "Creating a checkpoint with following shards {} at {}", |
| shardsAtStartingPoint, |
| startingPoint.getTimestamp()); |
| return new KinesisReaderCheckpoint( |
| shardsAtStartingPoint.stream() |
| .map(shard -> new ShardCheckpoint(streamName, shard.getShardId(), startingPoint)) |
| .collect(Collectors.toList())); |
| } |
| |
| @Override |
| public String toString() { |
| return String.format("Checkpoint generator for %s: %s", streamName, startingPoint); |
| } |
| } |