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Within Avalon their are a number of container solutions. This
reflects a historical divergence and a present convergence within
the area of containment technology within Avalon. The original
containment solutions ECM and Phoenix focussed on very different
approaches to component management. The ECM model dealt with
primarily pooled objects used in environments such as
Cocoon
. The
Phoenix model dealt with a strict singleton model supporting
project such as
James
.
Recent developments have resulted in the
release of
Fortress
and
Merlin
.
Fortress replaces the ECM solution
and is positioned as a migration vehicle for components to move
towards Avalon's latest container - Merlin. The Merlin container
is an attempt at being a flexible and adaptive embedded container
that leverages a set of common containment facilities.
Merlin provides support for legacy Phoenix components and includes
many of of the lifestyle concepts introduced within Fortress.
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Product
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Description
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Avalon Merlin
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The Merlin project deals with the broad area of service
and component management. The Merlin system is a container
that provides comprehensive support for the management of
complex component-based systems. Merlin uses a component
meta-model to facilitate the automated assembly and
deployment of simple and composite components.
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Avalon Fortress
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Fortress contains a framework to help you create your own
avalon containers. It boasts asynchronous management of your
component instances, high scalability, easier maintenance of
your code, and easy embedding into various environments like
servlet engines.
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ECM
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This package contains the ExcaliburComponentManager (ECM). ECM has
been depricated in favour of the new Fortress container.
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Phoenix
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Phoenix is a micro-kernel designed and implemented on top of
the Avalon framework. It provides a number of facilities to
manage the environment of Server Applications. Such facilities
include log management, classloading, thread management and
security.
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