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POSimple, hassle-free, zero-boilerplate serialization in Scala/Java similar to Python's Pickle?
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  1. POSimple, hassle-free, zero-boilerplate serialization in Scala/Java similar to Python's Pickle?
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    copied!<p>Is there a simple, hassle-free approach to serialization in Scala/Java that's similar to Python's pickle? Pickle is a dead-simple solution that's reasonably efficient in space and time (i.e. not abysmal) but doesn't care about cross-language accessibility, versioning, etc. and allows for optional customization.</p> <p>What I'm aware of:</p> <ul> <li>Java's built-in serialization is infamously slow (<a href="http://code.google.com/p/kryo/wiki/BenchmarksAndComparisons" rel="nofollow noreferrer">[1]</a>, <a href="https://github.com/eishay/jvm-serializers/wiki/" rel="nofollow noreferrer">[2]</a>), bloated, and fragile. Also have to mark classes as Serializable---annoying when there are things that are clearly serializable but which don't have that annotation (e.g. not many Point2D authors mark these Serializable).</li> <li>Scala's <a href="http://www.scala-lang.org/api/current/scala/io/BytePickle$.html" rel="nofollow noreferrer">BytePickle</a> requires a bunch of boilerplate for every type you want to pickle, and even then it <a href="http://scala-programming-language.1934581.n4.nabble.com/Pickling-cyclic-structures-td1989885.html" rel="nofollow noreferrer">doesn't work with (cyclic) object graphs</a>.</li> <li><a href="http://jserial.sf.net/" rel="nofollow noreferrer">jserial</a>: Unmaintained and <a href="http://jserial.sourceforge.net/faq.html#benchmarks" rel="nofollow noreferrer">doesn't seem to be that much faster/smaller</a> than the default Java serialization.</li> <li><a href="http://kryo.googlecode.com/" rel="nofollow noreferrer">kryo</a>: <a href="http://code.google.com/p/kryo/issues/detail?id=5" rel="nofollow noreferrer">Cannot (de-)serialize objects with no 0-arg ctors</a>, which is a severe limitation. (Also you have to register every class you plan to serialize, or else you get <a href="https://stackoverflow.com/questions/2725233/kryo-serialization-library-is-it-used-in-production">significant slowdowns/bloat</a>, but even so it's still faster than pickle.)</li> <li><a href="http://protostuff.googlecode.com/" rel="nofollow noreferrer">protostuff</a>: AFAICT, you have to register every class you intend to serialize in advance in a "schema."</li> </ul> <p>Kryo and protostuff are the closest solutions I've found, but I'm wondering if there's anything else out there (or if there's some way to use these that I should be aware of). Please include usage examples! Ideally also include benchmarks.</p>
 

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