[jboss-dev-forums] [Design of JBoss ESB] - Re: Http Gateway - requirements please...

[tfennelly]

So just looking at some configuration aspects (not implementation).... with the current http gateway (based on the embedded tomcat), you specify the listen address and port as part of defining a provider.  Then on the bus definition, you specify the context e.g.

<http-provider name="myhttp" host="localhost" port="9999">
  |     <http-bus busid="http1" context="/orders" />
  | </http-provider>

With the non embedded tomcat approach that we are proposing, a http bus will use the AS/ESB Server's http services and so there will be no configuring of the host and port.  As already stated, the ESB deployment process will create a war sub deployment for the gateway.  The gateway will then be deployed as with the normal war deployment process.  So the provider/bus definition could be something as simple as:

<http-provider name="http">
  |     <http-bus busid="orders" context="/orders" />
  | </http-provider>

Or just infer the context from the busid ala:

<http-provider name="http">
  |     <http-bus busid="orders" />
  |     <http-bus busid="queries" />
  | </http-provider>

The listener config at the moment looks like this:

<http-listener name="httplistener" busidref="orders" is-gateway="true" />

That works fine I think.  One downside is that it seems to mean that we're restricted to a 1:1 bus:listener relationship for http.  What if we added a "urlPattern" type config (mapping to the same in the web.xml) option on the listener (or provider perhaps?).  That would allow a single bus to be used across multiple listeners e.g.

<!-- "Dogs" order Service.... -->
  | <http-listener name="httplistener" busidref="orders" urlPattern="/dogs/*" is-gateway="true" />
  | 
  | <!-- "Cats" order Service.... -->
  | <http-listener name="httplistener" busidref="orders" urlPattern="/cats/*" is-gateway="true" />


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