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$Id$
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Commons SCXML Package
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Version 0.7
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Release Notes
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INTRODUCTION:
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Commons SCXML 0.7 primarily contains new features, along with a
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handful of bug fixes. See about section at the end for general information
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on Commons SCXML.
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IMPORTANT NOTES:
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o State IDs can no longer contain whitespace. Any IDs that contain spaces
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must be changed to conform before switching to v0.7.
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o Behavior related to wild card event name handling for transitions has
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changed (now aligns with latest Working Draft).
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o org.apache.commons.scxml.io.SCXMLDigester has been deprecated in favor
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of SCXMLParser in same package. See Javadocs for changes before switching.
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NEW FEATURES:
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o Conflicts between transitions are now resolved based on document order
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of the transitions.
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o Transition targets can now be specified as a space separated list of
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state IDs. When more than one targets are specified, they must belong
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to regions of the same parallel.
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o <final> is supported (by org.apache.commons.scxml.io.SCXMLParser).
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o <event> is supported (by org.apache.commons.scxml.io.SCXMLParser).
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DEPRECATIONS:
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See Javadocs of each item for details. All deprecated items are scheduled for
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removal in v1.0.
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o org.apache.commons.scxml.env.AbstractStateMachine#getStateMachine()
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o org.apache.commons.scxml.io.SCXMLDigester
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o org.apache.commons.scxml.io.SCXMLSerializer#serializeTarget(StringBuffer,
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Transition,String)
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o org.apache.commons.scxml.model.Parallel#addState(State)
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org.apache.commons.scxml.model.Parallel#getStates()
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o org.apache.commons.scxml.model.SCXML#addState(State)
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org.apache.commons.scxml.model.SCXML#getInitialState()
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org.apache.commons.scxml.model.SCXML#getStates()
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org.apache.commons.scxml.model.SCXML#setInitialState(State)
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o org.apache.commons.scxml.model.State#addChild(State)
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org.apache.commons.scxml.model.State#getIsFinal()
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org.apache.commons.scxml.model.State#getParallel()
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org.apache.commons.scxml.model.State#getTransitions()
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org.apache.commons.scxml.model.State#isDone()
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org.apache.commons.scxml.model.State#isOrthogonal()
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org.apache.commons.scxml.model.State#setDone(boolean)
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org.apache.commons.scxml.model.State#setIsFinal(boolean)
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org.apache.commons.scxml.model.State#setParallel(Parallel)
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o org.apache.commons.scxml.model.Transition#getPath()
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org.apache.commons.scxml.model.Transition#getRuntimeTarget()
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org.apache.commons.scxml.model.Transition#getTarget()
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org.apache.commons.scxml.model.Transition#setTarget(TransitionTarget)
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o org.apache.commons.scxml.semantics.ErrorConstants#NON_DETERMINISTIC
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BUG FIXES:
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o [SCXML-45] - Payload of events sent to current scxml session using <send>
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tag not injected into engine
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o [SCXML-48] - Cannot create more than one subclass of AbstractStateMachine
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o [SCXML-49] - SimpleSCXMLInvoker may miss transition to final state
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o [SCXML-51] - <assign> with location and expr both containing datamodel
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expressions concatenates old and new values
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o [SCXML-52] - Error on resolving conflicting transitions for compound states
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o [SCXML-53] - Wild card event name handling on transitions is not in line
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with W3C WD
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o [SCXML-54] - Events from custom actions missing payload
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o [SCXML-56] - onentry and onexit child elements of parallel do not have
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parent
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o [SCXML-58] - SCXML not stateless because of State class
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o [SCXML-60] - Possible race condition in AsyncTrigger
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o [SCXML-61] - Clarify interaction patterns for Invoker implementations with
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parent state machine executor
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IMPROVEMENTS:
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o [SCXML-41] - Adding information about original expression to evaluation
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error messages
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o [SCXML-46] - Provide a SCXMLListener abstract adapter class
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o [SCXML-55] - Add support for <event> tag
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OTHER CHANGES:
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o SCXMLExecutor logs state at a lower severity (changed from log level
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'info' to log level 'debug')
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o The LCA of two states belonging to sibling regions is now the enclosing
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Parallel, rather than the orthogonal State.
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o The regions of a parallel are entered in document order. This is
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implementation-specific behavior and users should not rely on it.
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o AbstractStateMachine and SimpleSCXMLListener classes, as well as the two
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standalone testing classes in the test package, have switched to the new
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SCXMLParser class.
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o Recommended version of Commons Logging has been upgraded to v1.1.1.
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o Recommended version of JUnit has been upgraded to v3.8.2.
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o An experimental Maven2 build has been added in v0.7.
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ABOUT COMMONS SCXML:
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The Commons SCXML (State Chart XML) project provides a generic
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state-machine based execution environment. It borrows most semantics
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from its namesake Working Draft at the W3C. Anything that can be
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represented as a UML state chart -- business process flows, view
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navigation bits, interaction or dialog management, and many more -- can
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leverage the Commons SCXML library. The library abstracts out the
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environment interfaces, and can be used in numerous server-side and
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client-side runtimes.
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Please visit the website for project information and documentation:
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http://commons.apache.org/scxml/
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