"Should enterprises now reconsider GAE/J as a deployment environment for certain Java applications?," Rodriguez asked.
The problem, he said, is that both Spring and Google App Engine do not adhere to the open Java standards.
While Spring isn't standards compliant, Rodriguez said that it's a "de facto" standard for a lot of IT departments. Google App Engine is not.
EMC VMware purchased SpringSource - the maker of the Spring Framework - on Aug. 10, 2009.
Either way, according to Rodriguez, enterprise are worried about vendor lock-in and they're taking a closer at whether they're building software based on open source, and open standards.
"Enterprises didn't much care about lock-in to the nonstandard Spring portfolio when it was from SpringSource, a small, friendly, company," Rodriguez wrote about the SpringSource acquisition. "Now that it's coming from VMware, a large enterprise software vendor with well-established profit motivations, it would be wise to get behind a relevant Java spec, like Java EE 6 Web Profile."