* Config of node roles cluster.role
* Cluster router configurable with use-role
* RoleLeaderChanged event
* Cluster singleton per role
* Cluster only starts once all required per-role node
counts are reached,
role.<role-name>.min-nr-of-members config
* Update documentation and make use of the roles in the examples
* ClusterSingletonManager
* ClusterSingletonManagerSpec multi-node test
* Use in cluster router with single master sample
* Extensive logging to be able to understand what is
going on
* Java api
* Add cluster dependency to contrib
* Add contrib dependency to sample
* Scaladoc
* rst docs in contrib area, ref from cluster docs
* Refactoring of standard metrics extractors and data structures
* Removed optional value in Metric, simplified a lot
* Configuration of EWMA by using half-life duration
* Renamed DataStream to EWMA
* Incorporate review feedback
* Use binarySearch for selecting weighted routees
* More metrics selectors for the router
* Removed network metrics, since not supported on linux
* Configuration of router
* Rename to AdaptiveLoadBalancingRouter
* Remove total cores metrics, since it's the same as jmx getAvailableProcessors,
tested on intel 24 core server and amd 48 core server, and MBP
* API cleanup
* Java API additions
* Documentation of metrics and AdaptiveLoadBalancingRouter
* New cluster sample to illustrate metrics in the documentation,
and play around with (factorial)
* Cluster sample
* The problem was that the sent job was sometimes sent to deadLetters
* The reason was that statsService was not created when a facade
at another node forwared the job to the statsService, i.e.
deadLetters
* Solved by using ask and recover with JobFailed in case of
timeout in the facade, so that the facade always sends back
JobResult or JobFailed
* 2 Sample applications with main programs to play with,
and multi-node tests to illustrate testing, and
code snippets for inclusion in rst docs
* TransformationSample illustratates subscription to
cluster events
* StatsSample illustrates usage of cluster aware routers, both
lookup and deploy
