Demonstrate how all the components above work together.Configure Coherence CE’s gRPC server and implement a JavaFX front end that uses the native Java client to interact with Coherence over gRPC.Implement a React-based web front end that will use the Helidon REST API, which will be served by the Helidon Web Server as well.Add support for server-sent events (SSEs) to the REST API to broadcast Coherence events to REST clients.
![oracle coherence oracle coherence](https://www.oracle.com/webfolder/technetwork/jp/obe/fmw/coherence/coherence_3.7/obe_Coherence3.7_ed/images/t00000.png)
I’ll make my application a lot more interesting than the quick start example, though: In addition to the Helidon REST service implemented there, my project will do the following:
![oracle coherence oracle coherence](https://www.oracle.com/assets/im08t0-coherence-ent-edition-1-1981193.jpg)
Extending the example To Do List service application
#Oracle coherence how to#
In this article, I will focus on how to build scalable stateful applications using Coherence CE. Along with my colleague Harvey Raja, I recently wrote A Gentle Introduction to Coherence, covering what the platform is and why you should consider using it for your next application, so I will not repeat that information here. That limited its appeal mainly to corporate users and took it out of consideration for many applications, including smaller or open source projects that didn’t absolutely need the features it offers.Īll that changed on June 25, 2020, when Oracle released Coherence Community Edition (CE), an open source version of the product.Ĭoherence CE may often be the best option you have when building modern, cloud native applications and services. That is a major oversimplification, of course, but it is sufficient for now.įor most of its history, Oracle Coherence was a commercial product with a fairly high price tag. Think of it as a scalable, concurrent, fault-tolerant implementation that is partitioned across multiple JVMs, machines, and even data centers. It’s an essential tool for improving the performance and scalability of Java EE applications, and it’s widely used for large-scale projects. It started as a distributed caching product and then evolved into an in-memory data grid. It has since been updated to cover the latest Coherence CE 22.06 and Helidon 2.5 releases. This article was originally published in Java Magazine, on August 14, 2020.
![oracle coherence oracle coherence](https://docs.oracle.com/en/middleware/fusion-middleware/coherence/12.2.1.4/manage/img/coherence-jvisualvm.png)
Use the open source Oracle Coherence Community Edition to create stateful applications that are as easy to scale, if not easier, than the stateless applications you are building today.