aws-blog-kinesis-producer-library: generateClickEvent data misleading to performance

[tflinz]

In the aws-blog-kinesis-producer-library click events are generated with the following code:

private static ClickEvent generateClickEvent() {
    byte[] id = new byte[13];
    RANDOM.nextBytes(id);
    String data = StringUtils.repeat("a", 350);
    return new ClickEvent(DatatypeConverter.printBase64Binary(id), data);
}

However, the bulk of the content is just the letter "a", which means that the data sent up to the servers will be extremely compressable. (ie. the uploaded compressed payloads will essentially be the 13 byte random number plus a few more bytes).

It would be more representative of performance, to make a larger percentage of the event payload random.