How To Add Line Separators in AWS Kinesis in CloudFormation? - aws-cloudformation

Question

We are processing data (records) through Kinesis Stream going to Kinesis Firehose and then outputting the data to a file in our S3 bucket.
Currently, however, all the records are on the same line in our output file, but we want each record to be separated so they are on their own line.
Instead of something like:
Store1, 100, Broccoli
Store1, 101, Avocado
Store1, 102, Apple
It currently looks like:
Store1, 100, BroccoliStore1, 101, AvocadoStore1, 102, Apple
Here is our CloudFormation template:
Resources:
MyBucket:
Type: AWS::S3::Bucket
MyStream:
Type: AWS::Kinesis::Stream
Properties:
Name: my-stream
RetentionPeriodHours: 24
ShardCount: 5
MyFirehose:
Type: AWS::KinesisFirehose::DeliveryStream
Properties:
DeliveryStreamName: my-firehose
DeliveryStreamType: KinesisStreamAsSource
KinesisStreamSourceConfiguration:
KinesisStreamARN:
Fn::Sub: "${MyStream.Arn}"
RoleARN:
Fn::Sub: "${MyRole.Arn}"
S3DestinationConfiguration:
BufferingHints:
IntervalInSeconds: 60
SizeInMBs: 50
CompressionFormat: UNCOMPRESSED
Prefix: concessions/
BucketARN:
Fn::Sub: "${MyBucket.Arn}"
RoleARN:
Fn::Sub: "${MyRole.Arn}"
How can we add line separators so that the records show up on their own lines?

Answer 1

Who ever is feeding your kinesis stream should add '\n' at the end.
See Java example below:
PutRecordRequest putRecordRequest = new PutRecordRequest();
putRecordRequest.setFirehoseName("incoming-stream");
String data = "some data" + "\n"; // add \n as a record separator
Record record = new Record();
record.setData(ByteBuffer.wrap(data.getBytes(StandardCharsets.UTF_8)));
putRecordRequest.setRecord(record);
firehoseClient.putRecord(putRecordRequest);
See source.