Snappy: How can I snappy compress byte buffer type?

Question

In my Java code, I have data of type java.nio.ByteBuffer. I have to snappy compress this. Using Snappy.compress() by importing org.xerial.snappy.Snappy; throws an error.

Snappy.compress(DataUtility.parseValue(record.valueSchema(), record.value())))

Do I need to convert this to another type before compressing or do I have to use a different compression method?

Thank you!

Take a look at `Snappy.compress(ByteBuffer uncompressed, ByteBuffer compressed)`. — JimmyB, Dec 11 '17 at 12:10
The error is `Cannot resolve method 'compress(java.nio.ByteBuffer)'` — NoName, Dec 11 '17 at 13:16

score 1 · Answer 1 · answered Dec 11 '17 at 13:43

1

Cannot resolve method 'compress(java.nio.ByteBuffer)'

That's because there is no method which accepts a ByteBuffer for input and returns a byte[].

Your options:

Use int compress(java.nio.ByteBuffer uncompressed, java.nio.ByteBufferc ompressed), providing a ByteBuffer with input data and another one to receive the compressed data, or
Get the input data into a byte[] first then use it as input to compress(byte[]):

.

byte[] inputBytes = new byte[inputBBuffer.remaining()];
inputBBuffer.get(inputBytes);

byte[] output = compress(inputBytes);

answered Dec 11 '17 at 13:43

JimmyB

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Thank you for your answer! I tried the second method and it threw me an IOException. The first method requires the second parameter `ByteBuffer` to have a fixed size while declaring it. Since I won't know the size of the compressed output, is there any other way to do it? – NoName Dec 11 '17 at 16:34
Not quite sure about how Snappy really works, but you could try and initialize the output buffer to at least the same size of the input. – JimmyB Dec 11 '17 at 16:51

Snappy: How can I snappy compress byte buffer type?

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