Java One KeyNote

Hi all.

Been busy watching a few video’s from Oracle Open World and Java One. Especially interesting is the Java One Key note available below:

Watch full-length keynote (1:33:22)

Plenty more coming at On Demand Videos link.


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Java SE 9 and Java EE 8 Released

Exciting new regarding release of Java SE 9 and Java EE 8!

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Coherence Released

Overnight Coherence (and Oracle Fusion Middleware) was released.

In terms of Coherence, this release contains a number of new features:

  • Revised Active-Active Federation Configuration – The new <active-active> configuration element is now used to define active-active federation topologies.
  • Global Consistent Snapshots – A snapshot can be now be created either on a running service (a service that is accepting and processing requests) or on a suspended service. The former provides consistency at a partition level while the latter provides global consistency – See the Persistence Documentation for more information.
  • HotCache Enhancements include:
    • HotCache multi-threading – HotCache can use multiple threads to apply trail file operations to Coherence caches.
    • HotCache Multitenant mode – HotCache can refresh caches for specific tenants.
    • HotCache JMX management – HotCache includes management data for monitoring the performance of cache update operations. This also includes a new tab in the JVisualVM plugin to display HotCache information.

You can find the documentation and release notes at


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Introducing Application Cache Client Java SDK for Oracle Cloud

Just back from an awesome vacation in far north Queensland and now catching up on 500+ emails!  One email I came across is that that the Oracle Application Container Cloud (ACCS) Application Cache Java SDK has now been released on GitHub.

For full details on this (and how Coherence is powering this behind the scenes), please see Shaun Smith’s post:




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Cloud Ready: Introduction to Distributed Streams

A couple of weeks ago, one of our Coherence Architects, Brian Oliver, gave a great presentation at “Oracle Code 2017”. I wasn’t able to get there, but fortunately we have a recording available on Youtube which is well worth the view –

The summary of his presentation is below:

“This talk interactively introduces the concept of Distributed Stream processing using the standard Java 8 Streams API, allowing what would traditionally be in-process streams to be processed across multiple Java processes, potentially deployed in a Cloud. We thus investigate how the regular Java Stream API may be utilized to process large data-sets and respond to streams of events, highlighting the challenges for developers, those providing support for distributed streams and the operational challenges faced using such techniques in production.”

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Updated Cover Photo

We’ve updated our cover photo to a beautiful sunset on Broome’s Cable Beach.  If you’ve never been there, it’s amazing and worth a trip!

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Happy New Year – Federation and HotCache Updates in

Been a while since i’ve managed to post here due to some heavy workloads and the usual Christmas and new year break, but am planning to squeeze in some time for Coherence released posts.

In October (yes last year!) we released of Coherence and WebLogic Server. From the Coherence side, this contained a few new features for HotCache but also included a small but significant update for Federation.


Federation now includes the ability to include custom participants into your topology. Up until now the only “Participants” allowed were Coherence Clusters. Custom participants allow you to define end-points such as files, databases, message bus or any other target you want to.

If you are using the Incubator’s “Push Replication Pattern”, then the addition of custom participants can assist in migrating from Push Replication to Federation. Keep your eyes out for a post on this coming up soon.


With this release HotCache includes the following new features:

  • HotCache can be used to warm caches by loading an initial dataset.
  • Support for Oracle SDO_GEOMETRY and XMLType types
  • Configuration has been made easier with ability to use JPA properties to configure  behavior.


See the Federation Documentation for more information on custom participants and Release Notes for information on HotCache new features.


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