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From "Sean Owen (JIRA)" <>
Subject [jira] [Created] (MAHOUT-664) Remove usage of XStream string serialization too?
Date Sun, 10 Apr 2011 21:59:05 GMT
Remove usage of XStream string serialization too?

                 Key: MAHOUT-664
             Project: Mahout
          Issue Type: Improvement
    Affects Versions: 0.4, 0.5
            Reporter: Sean Owen
            Priority: Minor
             Fix For: 1.0

In the spirit of MAHOUT-510 and continuing to standardize approaches without going too nuts
-- I notice that there is only one use of XStream left in the code, in StringUtils, which
is merely a wrapper for serializing/deserializing an object to a String.

There are two key mahout-core usages:
- Here it seems to be used to serialize/deserialize a candidate
solution to a file on HDFS and fed into a mapper. Surely it's more appropriate to do something
with Writable here?
- org.apache.mahout.df.mapreduce. It's used to serialize/deserialize a DefaultTreeBuilder.
Does it need to be done? it seems like DefaultTreeBuilder is parameterized entirely by its
param "m" but I haven't looked hard.

All of the other usages are in mahout-examples/, which suggests they're of secondary importance.

Some usages are serialization of longs and char[], which seems pointless.

Any thoughts? putting this on the map for 1.0.

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