Comment 1 for bug 454335

Kitblast,

Thanks for the feature request!

I've committed the change to trunk, and you can see it in the bzr revision 44. This code will be part of the 0.3 txJSON-RPC release, scheduled to come out this week sometime.

Your request brings up a bit of a tricky problem, since MAX_LENGTH is a class attribute in the . If you set it to one thing on one method call, it's going to be set for all instances that are created after that (in the same process). As a result, simply passing an override value will end up creating more problems than it solves.

The way around this takes two steps:

1. Users/developers create a subclass of the QueryFactory, overriding any class attributes or methods they want to, and then
2. Pass the subclass when creating a Proxy or when calling Proxy.callRemote.

I have added support for #2 so that now you can do #1 and get what you need :-) Here are some example usages:

1. On a per-call basis:

class MyFactory(QueryFactory):
    MAX_LENGTH = 1234

proxyInstance.remoteCall(method name, arg1, arg2..., factoryClass=MyFactory)

2. On a per-instance basis:

class MyFactory(QueryFactory):
    MAX_LENGTH = 1234

proxyInstance = Proxy(host, port, factoryClass=MyFactory)

This will set the default maxLength for all calls to 1000. Not that an override at the method-level supersedes an override at the instance-level.