v1.0.0

• nflow-engine
  • New API between nflow-engine and workflow implementations (StateExecution --> NextAction)
  • Added JavaDoc to public API
  • Support for multiple start states
  • Disallow overloading state methods in WorkflowDefinitions
  • Add executor_group to nflow_workflow_uniq index
  • Change nflow_workflow.external_id to not null in database
  • Use binary backoff for errors by default. Add builder for WorkflowSettings.
  • Set nflow_workflow.state_text only when retrying
  • Rename instantiateNull to instantiateIfNotExists (@StateVar annotation)
  • Check that busy loop next activation is never before now plus small activation delay
• nflow-rest-api
  • REST API from v0 to v1 context
  • Add externalId to ListWorkflowInstanceResponse
• nflow-tests
  • Use fail-fast rule for integration tests
• Code cleanup
  • Changed bean names to camelCase
  • Replace System.currentTimeMillis with DateTimeUtils.currentTimeMillis

v0.3.1

• Do not log exception, when "Race condition in polling workflow instances detected" happens
• Make dispatcher wait "random(0,1) * short wait time" after race condition (so that probability for race condition lowers in the next poll)
• Sort workflow instances by id before trying to reserve them in dispatcher (otherwise deadlocks may occur)
• Removed pollNextWorkflowInstanceIds from nflow-engine public API

v0.3.0

• Spring 3.2.x compatibility (previously only 4.0.x)
• Divided nflow-engine API to internal and public java packages
• Added 'executor group' concept: nFlow engines update heartbeat in database; workflow instances reserved for dead engines are auto-recovered
• integration to metrics library http://metrics.codahale.com/
• Starting nFlow engine through Spring lifecycle listener
• Allow custom ThreadFactory for creating nFlow threads
• Handle request data attached to workflow instances as state variable
• Timestamps (created, modified, etc) always set by database
• Splitted RepositoryService into WorkflowInstanceService and WorkflowDefinitionService
• Service for waking up workflow instances
• REST API: always return timestamps in ISO-8601 format
• Use 'official' JodaModule for DateTime (de)serialization
• Workflow instance idempotency management moved from nflow-rest to nflow-engine
• Support for legacy MySql databases (5.5 or below)
• Support for MariaDB 5.5.5
• Coveralls - GitHub integration
• Manual and end states no longer require handler methods; unexistent handler method causes workflow instance to be descheduled
• If no next state defined, workflow instance is put to error state
• Bug fix: state variables were saved multiple times, if the next workflow step was immediately executed

v0.2.0

• Choose database through Spring profile (nflow.db.h2, nflow.db.mysql, nflow.db.postgresql)
• Improved workflow instance dispatcher
• Improved integration test framework (nflow-tests)
• Increased unit test coverage
• Travis CI build against all supported databases for both openjdk7 and oraclejdk8
• Custom serialization through JacksonJodaModule instead of NflowJacksonObjectMapper
• Support for MySql 5.5.x

v0.1.0

• Initial public version