Patches

The following patch can be applied to the Brahms Agent Environment version 1.2.7 on any of the supported platforms. Extract the zip file into the Brahms/Agent Environment directory.

Patch 1 December 2008
- Added JAPI enhancements to simplify accessing and setting values for beliefs, facts, parameters, and variables. Additional methods were added to IActiveInstance, IWorldState, and AbstractExternalActivity.
- Added a State Viewer and breakpoint activity to allow modelers to inspect the state of an actor at runtime. A breakpoint activity was added to the BaseGroup and BaseClass concepts. An actor can anywhere in the body of a workframe have the actor perform that activity. When that activity is performed the State Viewer is displayed, displaying the frame instantiation agenda for that actor (current, available, interrupted, impassed frame instantiations). For an actor its current belief set can be displayed and for a frame instantiation its details including variable bindings.
- Added methods to obtain BrahmsGroupDescriptor and BrahmsClassDescriptor from the JAPI class.
- Enabled support for starting, pausing, resuming, stopping the Brahms VM using the JAPI.
- Fixed an issue in the Agent Viewer where the display text in history elements could not be greater than 255 characters, the maximum size is now 65K.
- Fixed the getValue methods in the descriptors to return null when the attribute value is unknown.
- Fixed a possible NullPointerException in resetting an external agent when shutting down the virtual machine.
- Fixed an issue in logging reporting failures via the agent monitor when no cause/exception is present. Now just using the message as the cause
- Changed the checksum routines used in the VerifyChecksum and CopyFile activities for empty files, now returning the checksum value of 0 for an empty file.
- Fixed the copy file activity to supporting copying of large files > 64MB.
- Changed the virtual machine to no longer invoke the start/stop methods on an external agent if the external agent failed to initialize.
- Updated the retract belief activities to now also allow for a 'fromActor' argument to be passed to retract a belief from an actor other than the actor performing the retractBelief activity. This allows for retraction of beliefs from data objects that do not have any behavior. BaseGroup and BaseClass include additional retractBelief and retractBeliefValue declarations.
- Added the ability to set the network interface to use to join a multicast group; property name: multicast.interface. This can be a useful property on multihomed hosts with a firewall configured to permit multicasting only on a single interface.
- Fixed the multicast tester to verify that the content of a received packet is indeed a string before extracting the value.
- Added addProcessListener and removeProcessListener methods to the IVMController interface in the JAPI.
- Fixed an issue with unknown preconditions when they use a variable for the collection index in the condition for a map type attribute. Those preconditions were incorrectly evaluated.
- Fixed Get/SetCommunicativeActProperty Java activities to support the value unknown.
- Added a BrahmsGroupDescriptor similar to BrahmsClassDescriptor to easily obtain belief values for attributes/relations declared for an agent of that group.
- Added set/get value methods to the BrahmsClassDescriptor and BrahmsGroupDescriptor that now also allow you to specify the lhsConcept for the belief from/for which to obtain/set the value.
- Fixed a NullPointerException in the Brahms/Java conversion API where the converters did not check for a null Brahms/Java instance mapping.
- Fixed an issue in the Brahms/Java conversion API where the converters did not properly prevent circular loops.
- Updated the CI Interface and CI Process Manager with additional failure monitoring support.