Date: 2003-12-09T20:11:58
Editor: 205.201.8.92 <>
Wiki: Apache Avalon Wiki
Page: AvalonGlossary
no comment
Change Log:
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@@ -4,7 +4,7 @@
Block:: One or more services (appliances) which create a single usable application.
Phoenix can co-host several blocks. Merlin defines a root block with an internal
hierarchal structure (sub-blocks).
Component:: The atomic unit of Component Oriented Programming. It made up of an
interface which defines the service it provides (the API) and one or more
implementations of that interface. The implementations can also provide lifecycle
methods (configuration, start, stop, etc.)
Container:: a special component which can host sub-components and is responsible
for all the resources and lifecycle stages of its hosts services.
- Extension [meta-tag]:: An extension tag in the meta-API declares component which
can provide an extension handler (i.e.- the "{ { { SecurityManager } } }" of a
security extension)
+ Extension [meta-tag]:: An extension tag in the meta-API declares component which
can provide an extension handler (i.e.- the {{{SecurityManager}}} of a security
extension)
Inversion of Control:: The design pattern which states that a component NEVER
controls its own lifecycle methods and that all dependencies are provided by a hosting
object (a container or some caller object). Control of a component is completely
given to the calling object.
Kernel:: generally refers to a container "bootstrapper" which provides external
resources (jars, classloaders, etc.) to the container in order for it to startup.
Lifecycle:: Refers to the general stages that a component progresses through during
execution. The Avalon framework defines a standard set of lifecycle stages and a
defined order. Fortress and Merlin containers allow for custom lifecycle stages to be
defined.
@@ -18,7 +18,3 @@
Service Manager:: a lookup manager for services. Allows services/components to
access (lookup) other services on which they are dependent.
Stage [meta-tag]:: A stage tag in the meta API declares that the component
implements an extended lifecycle stage (i.e.- the component implements "Securable")
System Repository:: A set of resources (classes, jars, meta-data, etc.) available
only to the kernel or the container. Includes a privileged classloader.
-
-
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-''(this page is part of the wiki materials for ApacheAvalon; avalon main page in the
wiki is AvalonProjectPages)''
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