/*
* 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
*
* 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.streams.amazon.kinesis;
import org.apache.streams.config.StreamsConfigurator;
import org.apache.streams.core.StreamsDatum;
import com.amazonaws.services.kinesis.model.GetRecordsRequest;
import com.amazonaws.services.kinesis.model.GetRecordsResult;
import com.amazonaws.services.kinesis.model.GetShardIteratorRequest;
import com.amazonaws.services.kinesis.model.GetShardIteratorResult;
import com.amazonaws.services.kinesis.model.Record;
import org.joda.time.DateTime;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.math.BigInteger;
import java.nio.charset.Charset;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* KinesisPersistReaderTask reads documents from kinesis on behalf of
* @see {@link KinesisPersistReader}.
*/
public class KinesisPersistReaderTask implements Runnable {
private static final Logger LOGGER = LoggerFactory.getLogger(KinesisPersistReaderTask.class);
private KinesisPersistReader reader;
private String streamName;
private String shardId;
private String shardIteratorId;
private Long pollInterval = StreamsConfigurator.detectConfiguration().getBatchFrequencyMs();
/**
* KinesisPersistReaderTask constructor.
*/
public KinesisPersistReaderTask(KinesisPersistReader reader, String streamName, String shardId) {
this.reader = reader;
this.streamName = streamName;
this.shardId = shardId;
}
@Override
public void run() {
GetShardIteratorRequest shardIteratorRequest = new GetShardIteratorRequest()
.withStreamName(this.streamName)
.withShardId(shardId)
.withShardIteratorType("TRIM_HORIZON");
GetShardIteratorResult shardIteratorResult = reader.client.getShardIterator(shardIteratorRequest);
shardIteratorId = shardIteratorResult.getShardIterator();
Map<String,Object> metadata = new HashMap<>();
metadata.put("streamName", streamName);
metadata.put("shardId", shardId);
while (true) {
GetRecordsRequest recordsRequest = new GetRecordsRequest()
.withShardIterator(shardIteratorId);
GetRecordsResult recordsResult = reader.client.getRecords(recordsRequest);
LOGGER.info("{} records {} millis behind {}:{}:{} ", recordsResult.getRecords().size(), recordsResult.getMillisBehindLatest(), streamName, shardId, shardIteratorId);
shardIteratorId = recordsResult.getNextShardIterator();
List<Record> recordList = recordsResult.getRecords();
for (Record record : recordList) {
try {
byte[] byteArray = record.getData().array();
//byte[] decoded = Base64.decode(byteArray);
String message = new String(byteArray, Charset.forName("UTF-8"));
reader.persistQueue.add(
new StreamsDatum(
message,
record.getPartitionKey(),
new DateTime(),
new BigInteger(record.getSequenceNumber()),
metadata));
} catch ( Exception ex ) {
LOGGER.warn("Exception processing record {}: {}", record, ex);
}
}
try {
Thread.sleep(reader.pollInterval);
} catch (InterruptedException ex) {
LOGGER.trace("InterruptedException", ex);
}
}
}
}