SOA Suite 12c: The Coherence Adapter By Maarten Smeets


clip_image001Oracle SOA Suite 12c ships with a new technology adapter, the Oracle CoherenceAdapter. This adapter allows easy integration with a Coherence Data Grid (a distributed cache). The excellent post by Antony Reynolds provides the information required to setup your Coherence cache and get started with the adapter. In this blog post I will describe a pattern which can be used to use Coherence Data Grid as a cache for a database table (or view, or…). Also I did some performance measures on the Oracle quickstart JDeveloper installation with Integrated Weblogic server and an XE database with surprising results!

Important tips from Antony’s post:

  • Use one Coherence cache per object type. This allows clearing the entire cache and specifying specific behavior per object type.
  • Make sure the Coherence configuration file is available to every server in the cluster (shared storage). This is similar to a DbAdapter configuration plan.
  • Set the servicename in the outbound connectionFactory of the CoherenceAdapter to DistributedCache so it works in clusters and WLSExtendProxy to false unless you are using this feature.
  • In 11c you can use Coherence from within a SOA Suite Spring component or by enabling the OSB result cache. Both have disadvantages though. 12c provides the CoherenceAdapter as alternative. Read the complete article here.

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About Jürgen Kress
As a middleware expert Jürgen works at Oracle EMEA Alliances and Channels, responsible for Oracle’s EMEA Fusion Middleware partner business. He is the founder of the Oracle SOA & BPM and the WebLogic Partner Communities and the global Oracle Partner Advisory Councils. With more than 5000 members from all over the world the Middleware Partner Community is the most successful and active community at Oracle. Jürgen manages the community with monthly newsletters, webcasts and conferences. He hosts his annual Fusion Middleware Partner Community Forums and the Fusion Middleware Summer Camps, where more than 200 partners get product updates, roadmap insights and hands-on trainings. Supplemented by many web 2.0 tools like twitter, discussion forums, online communities, blogs and wikis. For the SOA & Cloud Symposium by Thomas Erl, Jürgen is a member of the steering board. He is also a frequent speaker at conferences like the SOA & BPM Integration Days, JAX, UKOUG, OUGN, or OOP.

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