2016-11-15

More API Simplifications in Longevity 0.17

Longevity is the persistence framework to use with Scala and NoSQL. Release 0.17 simplifies the user API in some very pleasant ways. Empty marker traits Persistent and Embeddable are removed. Also, KeyVal now takes a single type parameter instead of two. In brief, this will make defining the classes you want to persist so much easier and more natural, as you no longer have to extend your persistent classes with empty marker traits.

2016-11-11

Longevity Artifacts for Scala 2.11 and 2.12

So I've finally got the longevity build set up to publish artifacts for Scala versions 2.11 and 2.12! I'm a little behind on the game, but, I've been busy ;-). Please use longevity version 0.16.1 for 2.12 artifacts. I'll be publishing artifacts for both Scala versions moving forward.

I'd like to shout out to the wonderful people at ScalaTest - Bill Venners and Chua Chee Seng - for helping me resolve an interoperability issue that made the longevity 2.12 artifacts possible. Thanks again!

2016-11-10

Partition Keys in Longevity

I'm so excited to announce the release of longevity version 0.16.0! Longevity now supports partition keys - a key where, given a key value, we can determine the node in a distributed database where the data resides (or would reside, if it existed). This is a critical feature for NoSQL databases in a distributed context. A partition key is implemented with sharding in MongoDB, and with partitioning in Cassandra.

I'll provide a brief example of a partition key here after the jump, but to learn more about it, please take a look at the user manual.

2016-10-13

Longevity 0.15.0 - Query Enhancements

Longevity - a persistence framework for Scala and NoSQL - is now up to version 0.15.0! The latest release focuses on query enhancements. We have added orderBy, offset, and limit clauses to our queries and query DSL.

2016-10-03

Sample Application for Longevity and Play Framework

I've ported my sample longevity application - Simple Blogging - from Akka HTTP to Play. The Play version is a Lightbend Activator tutorial, which you can find here. Or you can take a look at the source code here on GitHub.

Longevity is a persistence framework for Scala and NoSQL.

2016-09-26

Longevity 0.13.0 - Odds and Ends

In the past few weeks longevity has had three minor releases (0.11, 0.12, and 0.13) that clean up a variety of odds and ends that had been building up in the backlog. There was nothing major or exciting in these releases, but they are nonetheless important improvements. I haven't really publicized them much, but I wanted to let you know that longevity development is still proceeding.

Here are some changes that are worth mentioning:
  • You no longer have to specify polyType and polyPType in your DerivedTypes and DerivedPTypes, respectively.
  • Instead of just creating schema every time, I've added RepoPool.createSchema(), which you can call as you like. Schema creation is still non-destructive. And you can turn on the old behavior with configuration flag longevity.autocreateSchema.
  • I added RepoPool.closeSession(), so you can clean up resources held by the underlying database drivers.
  • I added some logging output.
  • I added JSON marshallers and unmarshallers to the longevity context.
Next on the list is query enhancements! Although I have a couple of things to work on other than longevity proper that may precede it. I need to debug and fix a problem that has come up with longevity tests in ScalaTest version 3.0.0. And I'm thinking I'll port my sample application simbl from Akka HTTP to Play.

2016-08-26

Configuration-level Optimistic Locking with Longevity

Longevity - a persistence framework for Scala and NoSQL - has been built from day one to isolate persistence concerns behind a clear, consistent, and easy to use API. The power of this design principle is demonstrated by how easy it is for you to bring optimistic locking to your application. All you have to do is set a configuration flag.

Longevity is growing to full maturity, and most features you would expect from a persistence framework are in place. Our 0.10.0 release brings many incremental improvements - including support for controlled vocabularies. But the central feature of this release is configuration-level optimistic locking.