Date: 2004-01-09T12:04:02
Editor: 160.33.82.119 <>
Wiki: Apache Avalon Wiki
Page: ContainerStory
URL: http://wiki.apache.org/avalon/ContainerStory
added Stephen's comments on service vs component -farra
Change Log:
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@@ -38,7 +38,19 @@
Object serviceManager.lookup(String role);
-So in this sense, Components ARE Services. But now the Avalon community had two
names for the same thing and this is generally were confusion arises. In ''my''
humble opinion, the word ''service'' generally describes the interface or role and
''component'' describes the interface + one or more implementations. But that's just
me.
+So in this sense, Components ARE Services. But now the Avalon community had two
names for the same thing and this is generally were confusion arises. In ''my''
humble opinion, the word ''service'' generally describes the interface or role and
''component'' describes the interface + one or more implementations. But that's just
me. -farra
+
+Stephen adds:
+
+I disagree with this. A "component" is an implementation artifact that
+exposes 0..n services. A "service" is computation contract exposed by a
+component. A component may include many other features that are not
+exposed through the services that is publishes.
+
+A "service" is typically represented by a Java interface and possibly
+supporting meta-info (such as a version, attributes, etc.).
+
+A "component" is an example of a "service-delivery-strategy".
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