This is possible theoretically, but I haven't thought deeply about Hessian replacement scenario. I am personally planning to use it as a framework for backup/restore solution for huge databases that allows to apply custom rules to data filtering and processing of the data.

If anything, this may end up being a replacement of org.apache.cayenne.xml package. XStream provides a well-defined (de)serialization lifecycle that allows to build various interceptors and custom serializers. Also it has "plugins" for serialization formats. So for example out of the box it can produce either XML or JSON.

Comparing that to Hessian, my wild guess is that XStream won't be faster (even with compact JSON output), but it certainly more developer-friendly (cleaner API, better documentation, etc).

Andrus


On Sep 13, 2009, at 7:43 AM, Andrey Razumovsky wrote:
Hi Andrus,

Is this feature a replacement for Hessian serialization? What are the
benefits of using XStream (is it faster, etc)?

Thanks

2009/9/11 <[email protected]>

Author: aadamchik
Date: Fri Sep 11 01:32:14 2009
New Revision: 813647

URL: http://svn.apache.org/viewvc?rev=813647&view=rev
Log:
prototyping (de)serializer based on XStream

  cleanup/refactoring

Modified:
  cayenne/sandbox/cayenne-serialization/pom.xml

Modified: cayenne/sandbox/cayenne-serialization/pom.xml
URL:
http://svn.apache.org/viewvc/cayenne/sandbox/cayenne-serialization/pom.xml?rev=813647&r1=813646&r2=813647&view=diff

= = = = = = = = = =====================================================================
--- cayenne/sandbox/cayenne-serialization/pom.xml (original)
+++ cayenne/sandbox/cayenne-serialization/pom.xml Fri Sep 11 01:32:14 2009
@@ -21,9 +21,9 @@
              <artifactId>cayenne-parent</artifactId>
              <version>3.0-SNAPSHOT</version>
      </parent>
-       <artifactId>cayenne-xstream</artifactId>
-       <name>Serialization Framework based on XStream</name>
- <description>A Framework for customizable rule-based serialization
of persistent object subgraphs based on XStream.</description>
+       <artifactId>cayenne-serialization</artifactId>
+       <name>Serialization Framework for Persistent Objects</name>
+ <description>A Framework for customizable rule-based serialization of persistent object subgraphs, currently based on XStream.</ description>
      <packaging>jar</packaging>
      <dependencies>
              <dependency>





--
Andrey

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