On Wed, Apr 30, 2008 at 12:00 PM, Simon Laws <[EMAIL PROTECTED]> wrote:
> > > On Wed, Apr 30, 2008 at 11:12 AM, ant elder <[EMAIL PROTECTED]> wrote: > > > Bring this comment to the dev list: > > > > "The tuscany web app support doesn't use this evolving node > > implementation > > just yet. I don't imagine it would be difficult to plug it in ...." > > - http://apache.markmail.org/message/4hvdrcafhapy3kyy > > > > Coincidentally i was having a look at this just the other day after that > > user posted about support for Tomcat with multiple webapps in the same > > SCA > > domain - http://apache.markmail.org/message/ttssxoruzpndkado. > > > > Could you give any pointers at all on where to start with using this > > evolving node implementation like this? Theres no doc and I'm a bit lost > > on > > even which Tuscany modules, samples or tests are current. What I'd like > > to > > do is start exploring the updating of the old runtime-tomcat code to use > > the > > latest domain stuff so that as Tomcat starts up webapps are detected as > > SCA > > contributions and added to a single Tomcat SCA domain. One issue that I > > remember came up last time doing this is that as this happens during > > Tomcat > > startup no http communication can take place so all the registrations of > > contributions with the domain need to be in-vm. > > > > ...ant > > > > Hi Ant > > Am keen to work with you on this. While svn has been down I've spent time > to resurrect a load balancing demo I have on my local disc (not checked in > yet) and would like to update the webapps I'm using to the lasted domain > code but of course I can't. > > Here's a summary of what I think is current in terms of > domain/node/runtime support (but have to admit that there is an amount of > guessing here)..... > > sca/distribution/standalone - not sure but think it's redundant - > forerunner of runtime-standalone? > sca/distribution/tomcat - not sure but think it's redundant - forerunner > of runtime-tomcat? > sca/distribution/war - not sure but think it's redundant - forerunner of > runtime-war? > sca/distribution/webapp - not sure but think it's redundant > sca/modules/domain - old domain SPI > sca/modules/domain-api - old domain API > sca/modules/domain-impl - old domain Implementation - has been superseded > by domain-manager > sca/modules/domain-manager - new domain management application - replaces > domain-impl > sca/modules/host-embedded - original single JVM domain implementation - > still used in most samples > sca/modules/host-webapp - original webapp runtime - fires up tuscany based > on web.xml filter > sca/modules/host-webapp-junit - not sure but have a feeling it's something > to do with running itests in different web containers > sca/modules/node - old node SPI > sca/modules/node-api - old node API > sca/modules/node-impl - old node implementation that runs one or more > composites in a single JVM as part of a distributed domain > sca/modules/node2-api - new node API > sca/modules/node2-impl - new node implementation. This node is coded to > read it's configuration as an atom feed from the new domain-manager > sca/modules/node2-launcher - start up a node from the command line > sca/modules/node2-launcher-webapp - had noticed this before - maybe node2 > integration with webapps has been looked at. Let's see! > sca/modules/runtime - I think this was the last attempt at providing a > common runtime baseline to be specialized for different environments > sca/modules/runtime-standalone - command line runtime > sca/modules/runtime-tomcat - deep tomcat integration (IIRC) > sca/modules/runtime-war - war rutime > sca/modules/workspace - SPI for some of the machinery required to process > contributions at the domain level. Used by domain-manager > sca/modules/workspace-impl - Implementation of the workspace > sca/modules/workspace-xml - Reading/writing workspace as XML > > So can we get together here and work out what the true picture is and how > to mode modules/runtime* to node2. First things first I'm going to go look > at node2-launcher-webapp. > > I think the start up process for nodes in a webapp will potentially be > easier now as the node is just reading atom feeds and not making soap calls. > Time will tell! > > Simon > One more question - what is a node? May seem like a silly question but i'm not sure there's ever been much consensus on a clear definition. Is it something for running a single composite, or a single contribution, or a collection of related contributions? How many nodes would there be on a Tomcat instance doing what that user has posted about, one per webapp, one per Tomcat instance? ...ant
