Github user rmetzger commented on a diff in the pull request:
https://github.com/apache/flink/pull/1911#discussion_r60733595
--- Diff:
flink-streaming-connectors/flink-connector-kinesis/src/main/java/org/apache/flink/streaming/connectors/kinesis/FlinkKinesisConsumer.java
---
@@ -0,0 +1,481 @@
+/*
+ * 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.flink.streaming.connectors.kinesis;
+
+import com.amazonaws.regions.Regions;
+import org.apache.flink.api.common.typeinfo.TypeInformation;
+import org.apache.flink.api.java.typeutils.ResultTypeQueryable;
+import org.apache.flink.configuration.Configuration;
+import org.apache.flink.runtime.state.CheckpointListener;
+import
org.apache.flink.streaming.api.checkpoint.CheckpointedAsynchronously;
+import
org.apache.flink.streaming.api.functions.source.RichParallelSourceFunction;
+import org.apache.flink.streaming.api.watermark.Watermark;
+import
org.apache.flink.streaming.connectors.kinesis.config.KinesisConfigConstants;
+import
org.apache.flink.streaming.connectors.kinesis.internals.KinesisDataFetcher;
+import
org.apache.flink.streaming.connectors.kinesis.config.CredentialProviderType;
+import
org.apache.flink.streaming.connectors.kinesis.config.InitialPosition;
+import
org.apache.flink.streaming.connectors.kinesis.model.KinesisStreamShard;
+import
org.apache.flink.streaming.connectors.kinesis.model.SentinelSequenceNumber;
+import org.apache.flink.streaming.connectors.kinesis.proxy.KinesisProxy;
+import
org.apache.flink.streaming.connectors.kinesis.serialization.KinesisDeserializationSchemaWrapper;
+import
org.apache.flink.streaming.connectors.kinesis.serialization.KinesisDeserializationSchema;
+import org.apache.flink.streaming.connectors.kinesis.util.AWSUtil;
+import org.apache.flink.streaming.util.serialization.DeserializationSchema;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.util.Collections;
+import java.util.Map;
+import java.util.HashMap;
+import java.util.List;
+import java.util.ArrayList;
+import java.util.Properties;
+
+import static com.google.common.base.Preconditions.checkArgument;
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * The Flink Kinesis Consumer is a parallel streaming data source that
pulls data from multiple AWS Kinesis streams
+ * within the same AWS service region. Each instance of the consumer is
responsible for fetching data records from
+ * one or more Kinesis shards.
+ *
+ * <p>To leverage Flink's checkpointing mechanics for exactly-once
streaming processing guarantees, the Flink Kinesis
+ * consumer is implemented with the AWS Java SDK, instead of the
officially recommended AWS Kinesis Client Library, for
+ * low-level control on the management of stream state. The Flink Kinesis
Connector also supports setting the initial
+ * starting points of Kinesis streams, namely TRIM_HORIZON and LATEST:</p>
+ *
+ * <ul>
+ * </ul>
+ *
+ * <p><b>NOTE:</b> The current implementation does not correctly handle
resharding of AWS Kinesis streams.</p>
+ * <p><b>NOTE:</b> Since Kinesis and Kafka share many common abstractions,
the implementation is heavily based on
+ * the Flink Kafka Consumer.</p>
+ *
+ * @param <T> the type of data emitted
+ */
+public class FlinkKinesisConsumer<T> extends RichParallelSourceFunction<T>
+ implements CheckpointListener,
CheckpointedAsynchronously<HashMap<KinesisStreamShard, String>>,
ResultTypeQueryable<T> {
--- End diff --
I don't think we need to implement the `CheckpointListener` currently
because we are not committing the offsets anywhere.
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