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I'm new to this Apache Avro(serialization framework). I know what serialization is but why there are separate frameworks lik avro, thrift, protocol buffers and
Why cant we use java serialization api's instead of these separate frameworks, are there any flaws in java serializatio api's.
What is the meaning of below phrase "does not require running a code-generation program when a schema changes" in avro or in any other serializatio framework.
Please help me to understand all these!!
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Data serialization is the process of converting an object into a stream of bytes to more easily save or transmit it. The reverse process—constructing a data structure or object from a series of bytes—is deserialization.
XML , JSON , BSON, YAML , MessagePack, and protobuf are some commonly used data serialization formats.
Serialization encodes objects into another format. For example you have an array in PHP like this: $array = array("a" => 1, "b" => 2, "c" => array("a" => 1, "b" => 2));
JSON is a format that encodes objects in a string. Serialization means to convert an object into that string, and deserialization is its inverse operation (convert string -> object). If you serialize this result it will generate a text with the structure and the record returned.
Why cant we use java serialization api's instead of these separate frameworks, are there any flaws in java serializatio api's.
I would assume you can use Java Serialization unless you know otherwise.
The main reasons not to use it are
does not require running a code-generation program when a schema changes
I am guessing this means it can read serialized data with an older or newer model without having to re-generate and compile the code. i.e. it is tolerant of changes in the model.
BTW: As the data models I work with are usually a) very simple b) require maximum performance, I write my own Serialization without using a framework (or write my own framework) This is fine provided your model is very simple and won't change often.
In short, unless you know you can't, try Java Serialization first.
A comparison I did on different Serialization Methods
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