Serializers

Serializers

Hector uses Serializers to make it simpler when querying for data from Cassandra which stores keys, names and values as byte arrays.

Most of the get-x functions (get-columns for example) have optional arguments that allow the caller to specify the serializer to use for the keys, names and values.

Below is a list of supported serializers

• :integer
• :string
• :bytes
• :long
• :uuid
• :bigint
• :bool
• :date
• :object
• :ascii
• :byte-buffer
• :char
• :double
• :float
• :short

Additionally, it's trivial to write your own serializer (should you wish to). Instead of passing one of the keywords above (as an optional parameter to a function), you can instead pass an instance of an object that implements Hector's Serializer interface.

The following code shows how to implement a TimeUUID deserializer that you could pass to the get-x functions:

(proxy [Serializer] []
  (fromBytes [b] (TimeUUIDUtils/toUUID b))
  (fromByteBuffer [bb] (TimeUUIDUtils/uuid bb)))