Objectify 4 and App Engine Memcache (key serialization)

[GoogleCodeExporter]

Problems with Key Serialization at Objectify 4 and Memcache.

CODE: (This code works well with Ofy 3.1)

//CacheManager: memcache app engine low level wrapper

CacheManager.put(cacheKey, postalCodeKeyList, 500, CacheAPI.NAMESPACE_LOCATION);

Error:

: java.lang.IllegalArgumentException: Cannot use as value: 
'[Key<?>(PostalCode("48001")), Key<?>(PostalCode("48002")), 
Key<?>(PostalCode("48004")), Key<?>(PostalCode("48005")), 
Key<?>(PostalCode("48006")), Key<?>(PostalCode("48007")), 
Key<?>(PostalCode("48008")), Key<?>(PostalCode("48009")), 
Key<?>(PostalCode("48010")), Key<?>(PostalCode("48011")), 
Key<?>(PostalCode("48012")), Key<?>(PostalCode("48013")), 
Key<?>(PostalCode("48014")), Key<?>(PostalCode("48015")), 
Key<?>(PostalCode("48070")), Key<?>(PostalCode("48071")), 
Key<?>(PostalCode("48080"))]'

Original issue reported on code.google.com by hiri...@gmail.com on 7 Sep 2012 at 9:40

• Merged into: #120

[GoogleCodeExporter]

Sorry, this behaviour occurs with Ofy 4.0a3 and 4.0.a4 jars at 

http://code.google.com/p/objectify-appengine/source/browse/com/googlecode/object
ify/objectify/4.0a4/objectify-4.0a4.jar?repo=maven

Original comment by hiri...@gmail.com on 8 Sep 2012 at 9:23

[GoogleCodeExporter]

Ok.... If you see Issue 120: ResultProxy not serializable....

You can solve this, just creating new instance of ArrayList.

Be carefull, because this behaviour occurs only when you obtain an Array List 
from query.keys().

CacheManager.put(cacheKey, new ArrayList<PostalCode>(postalCodeKeyList), 500, 
CacheAPI.NAMESPACE_LOCATION);

Original comment by hiri...@gmail.com on 8 Sep 2012 at 11:35

[GoogleCodeExporter]

At some point we need to figure out how to get proxies to auto-serialize to 
arraylist.  Merging this into the previous issue.

Original comment by lhori...@gmail.com on 9 Sep 2012 at 3:27

• Changed state: Duplicate