Some new thoughts on this issue...
> We can also use XML Schemas to validate the XML and we will have a
> generic
> approach then to be used for the Swiftlet API.
In the meantime I tend to don't use XML schemas or DTDs. XML schemas are
in a very early stage (there is only a Xerces beta) and DTDs don't fit
the requirements.
Each router has a generic management tree and each Swiftlet must insert
its configuration there. The tree is an integral part of a router and is
used on startup (loading the configuration) as well as from the admin
tools (Explorer/CLI).
A management tree consists of EntityLists, each may have Entities which
may have different Properties. You can see a management tree in the
Explorer as well as CLI. The management tree itself is the instance to
perform all operations such as inserting or deleting entities or changing
properties. The admin tools are only command senders/event receivers.
Instead of using an XML schema subset, a Swiftlet jar-file could contain
a simple 'template.xml' which describes the configuration in form of
EntityLists/Entities/Properties:
<template>
<property name="backstore"
type="java.lang.String"
mandatory="true" />
<property name="default-cachesize"
type="java.lang.Integer"
mandatory="false"
defaultvalue="100"
minvalue="10" />
<property name="default-cleanupinterval"
type="java.lang.Long"
mandatory="false"
defaultvalue="120000"
minvalue="1000" />
<entitylist name="queues">
<entity>
<property name="cachesize"
defaultproperty="default-cachesize" />
<property name="cleanupinterval"
defaultproperty="default-cleanupinterval" />
</entity>
</entitylist>
</template>
On base of this template definition a Swiftlet configuration could be:
<swiftlet name="sys$queuemanager"
class="com.swiftmq.router.queue.QueueManagerimpl">
<backstore>../../store/router1</backstore>
<queues>
<testqueue>
<cachesize>500</cachesize>
<cleanupinterval1>360000</cleanupinterval>
</testqueue>
<timequeue />
</queues>
</swiftlet>
Any comments are appreciated!
--
Andreas Mueller, IIT GmbH, Bremen/Germany, http://www.iit.de
SwiftMQ - JMS Enterprise Messaging System, http://www.swiftmq.com
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