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From Aristedes Maniatis <>
Subject Re: [jira] [Commented] (CAY-2038) Hessian serialization error when using JSR-310 Date types with ROP
Date Tue, 08 Dec 2015 12:40:40 GMT
I've just been talking to Dima about this and I think we are in agreement that the first most
important issue for us is not the serialisation, but rather introducing clean separation between
three things:

* cayenne
* hessian
* transport (http)

Currently, those things are deeply mixed up, and that makes it somewhat tricky to add gzip
compression to the connection or switch from HTTP to HTTP2. We believe that HTTP2 will give
us significant performance improvements for the type of workloads we see. Latency is very
important because of the large number of small requests Cayenne will make (for example, every
time a bit of UI needs to follow a join).

So even keeping Hessian in place, we need to make the parts more pluggable. I'm interested
in any opinions people might have on this work. I am assuming we'll look at the Cayenne DI
library to provide simple ways to replace the serialisation library or the transport choice.


On 7/12/2015 10:01pm, Andrus Adamchik wrote:
>> On Dec 7, 2015, at 12:53 PM, Aristedes Maniatis <> wrote:
>> Also, I just saw this: which is licensed under a BSD-style three
clause thing. That looks like it overlaps linkrest a bit in features, but perhaps we can learn
a bit about their approaches to RPC service calls which need to wrap around the actual Cayenne
> LinkRest objective is building RESTful APIs, which is the opposite of RPC. ROP though
(at least currently) is RPC. So yeah, there may be something there.
> Andrus

Aristedes Maniatis
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