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CHANGELOG.md

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Changelog

A list of all tagged versions of WorkflowFM-PEW.

Includes feature updates, bug fixes, and open issues.

Known Issues

v1.6.1 - 2021-10-03

  • Introduces AkkaPiObservable and AkkaPiStream.
  • Removes dependency to SubAkka (see #67).

v1.6.0 - 2021-06-06

v1.5.0 - 2021-03-19

First open source release under the Apache 2.0 License.

Changes and fixes

  • Restructured the project into multiple modules.
  • Fixed long standing issue with MultiStateExecutor, which is now renamed MutexExecutor.
  • Introduced CASExecutor using Java's ConcurrentHashMap.
  • Updated simulator to use Proter v0.6 and not use Akka.
  • Improved the use of pi-calculus channels to make no assumptions about their data structure (see #63).
  • Fixed a race condition in AkkaExecutor.init (see this commit).
  • Various fixes and small improvement in the metrics outputs (e.g. see #60).
  • Various minor improvements in unit tests and scaladocs.

v1.4.0 - 2019-07-01

Features

  • Improved PiEventHandlers. The PromiseHandler is now generalized to return a single object at the end of the workflow. The old PromiseHandler is an instance called ResultHandler (see also #26).
  • Implemented PiStream using Akka's BroadcastHub to enable more flexible event handling (see also #34). Executors can now be mixed in with (at least) either of the two default observables, namely SimplePiObservable and PiStream.
  • SimMetricsActor no longer keeps a reference to the Coordinator. This makes for a cleaner, more flexible implementation, allowing multiple simulations across multiple Coordinators. The downside is that simulations can be run asynchronously, making it hard to disambiguate which results came from which Coordinator. We leave that problem to the user for now.

v1.3.0 - 2019-06-19

For some unknown reason, the version number was increased in build.sbt back in December without actually merging the intended changes or creating a new tag. In the meantime, #45) was merged with various bug fixes and minor changes, the Ski example was updated and some documentation was added. I decided to create the tag now and push the stream changes to 1.4.0.

Features

  • All PiEvents now carry an array of PiMetadata. The default value contains the system time of the event. Atomic processes can expose additional metadata for PiEventReturn (see also #21).
  • Fixed some codec issues (see also #31).
  • The simulator now measures the simulation's real (system) duration.
  • Some PiEvents got rearranged or renamed (see also #45).
  • Bugfixes and improvements for KafkaExecutor and KafkaExecutorTests (see also #45).
  • Various improvements in Executor unit tests.

v1.2.2 - 2018-12-03

Features

  • Fixed AkkaPiObservable registering handlers globally (see also #7).
  • Improved simulation Coordinator. Processes can now interact with the Coordinator and its clock cycle is a bit more robust (see also #28).
  • Fixed/improved Codecs for custom data types, which includes AnyCodec and associated parts (see also #29).
  • Fixed issues with the ClassLoader crashing in Kafka (see also #30).

v1.2.1 - 2018-11-21

Features

  • Fixed problems and improved the Scheduler (issue 20).
  • Added unit tests for the Scheduler and Task priority.

v1.2.0 - 2018-11-14

Features

  • Improved simulation analytics #18 (see also #16).
  • That code is now disentangled from the individual parts of the simulation and concentrated on a SimMetricsAggregator within the Coordinator.
  • The classes holding the metrics are cleaner and easier to expand or translate to outputs.
  • This also solves the constraint of the Coordinator having to start from time 1L. Instead you can now use a custom starting time (such as the current timestamp in milliseconds) with a default of 0L.
  • Key improvements with the timeline, including a bug with "relative time" mode.

v1.1.0 - 2018-11-07

Features

  • Implemented analytics and timeline visualization for any workflow execution using PiEvents. #15

v1.0 - 2018-11-07

Features

  • Implementation of KafkaExecutor (#10,#11).
  • Executors are now Observable #8 using PiEventHandlers and observing PiEvents (see also #5).
  • Also improved ProcessExecutor trait/API.
  • Various improvements in simulation and the D3 timeline.

v0.1 - 2018-09-18

Features

  • Initial port from older SVN repository.
  • Main PEW engine for execution of generated pi-calculus workflows.
  • First versions of AkkaExecutor and MongoExecutor.
  • Simulation capabilities with D3 timeline visualization.