Re: Esper release 2.1

>
> The Esper team is happy to announce release 2.1 now available. This release
> has added significant new features and enhanced existing ones. Please find
> the change log below.
>
> Special thanks to Paul Fremantle of WSO2 that contributed streaming XML
> event type based on Apache Axiom. Also thanks for Jerry Shea that
> contributed nano-time resolution as well as EsperIO enhancements. Any other
> unmentioned supporters also deserve a thanks.
>
> We have a further upcoming announcement that our inward-facing JDBC driver
> is available for GA, to be publicly available this week. This local and
> remote driver adds standards-based access for charting and reporting to
> real-time data within Esper.
>
> Best regards,
> Tom
>
> Major API changes
>   - New API to plug-in of a custom event type
>   - Added additional sendEvent method that accepts alias name and event
> object, plus EventSender instance to skip type lookup
>
> New Features
>   - Added support for variant event streams, into which events of disparate
> event types can be inserted and treated as the same type
>   - Added support for update events (aka. version or revision events)
>   - Added support for streaming XML using Apache Axiom
>   - Added support for EsperIO CSV adapter to send bean events
>   - Allowed normalization of subevents into resultant stream
>   - Allowed DOM-type property of XML events transpose into new stream for
> use with XPath and nested syntax
>
> Minor changes
>   - Properties can now be prefixed by the engine URI and the event type
> alias used in the from-clause; Event streams can be prefixed by the engine
> URI (SQL compatibility)
>   - Added full support for nano/microsecond resolution
>   - Allowed access to statement's XPathFactory instance to supply
> XPathFunctionResolver, etc.
>   - Added support for an escape syntax for event property names that contain
> dots
>   - Allowed esperio to use external timer
>   - Added support to specify a time period in output rate limiting
>   - Added support for the "in" operator to accept array properties,
> collection (set, list) property or map property for contains-value semantics
>   - Now uses thread ClassLoader for compatilibility with OSGi
>   - Provide additional XPath return value types to cast to
>   - Allow certain keywords to be used as column alias, such as "select
> count(*) as count from foo"
>   - Fixed issue ESPER-197 EsperIO/CSV reported to be slow
>   - Fixed issue ESPER-208 Esperio runs out of stack space when processing
> largeCSV file and not using engine thread
>   - Fixed issue ESPER-209 Stop of consumer statements of named windows may
> not entirely deregister consumer
>   - Fixed issue ESPER-213 ConcurrentModificationException creating consuming
> statements to a single named window under threading
>   - Fixed issue ESPER-214 ClassCastException in named window dispatch for
> timer thread when multiple insert-into
>   - Fixed issue ESPER-219 Documentation for plug-in views not specifying
> implicit contract towards object references
>   - Fixed issue ESPER-220 TimeBatchView.computeWaitMSec can give incorrect
> results for low "interval"
>   - Fixed issue ESPER-221 Named window with batch expiry policy causes late
> consumers to post incorrect data or throw IllegalArgumentException
>   - Fixed issue ESPER-227 No documentation on time-batch view parameter for
> reference point
>   - Fixed issue ESPER-228 PDF document page number not showing
>
>
>  ________________________________
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