I am trying to find implementation of GemFire and I am in search of model which can insert data to GemFire as well. I am getting PDX serialization error using CacheWriter.
There are plenty of example in both the Pivotal GemFire and Spring space.
As you may know, Pivotal GemFire is based on the open source Apache Geode, which has a few How-To articles on the Wiki. There is an article on Geode In 5 Minutes that lead you to a few other places.
With Spring Data GemFire, there are plenty of examples, starting with the Spring GemFire Examples GitHub project.
I also have several other examples in my own GitHub account, such as...
The Contacts Application Reference Implementation (RI). This is the most current, up-to-date set of examples since I use these as a single source of truth for conference talks as well as to showcase the latest developments in GemFire with Spring.
I also have an entire GitHub Repository (spring-gemfire-tests) dedicated to reproducing/understanding customer issues, building prototypes or proof-of-concepts, and so on.
Last, but certainly not least, you can review the SDG test suite, which has many of tests that can be used as examples for putting/getting data to/from GemFire using Spring along with configuring PDX. #2 above is also a good resource for this as well.
If you are looking for something in particular, pertaining to your UC, let use know what you UC is and perhaps we/I can direct you better.
Hope this helps!
-John