[ http://jira.jboss.com/jira/browse/JBMICROCONT-4?page=comments#action_12310881 ] Ivelin Ivanov commented on JBMICROCONT-4: -----------------------------------------
[From Mladen] I don't like it. It has one major design flow and that is not allowing protocol stacking. As mater affect my humble apvfs is IMO the only virtual file system on the planet that allows that. For example I can use database->zip->memory, so you can have a zip file inside a database that will be managed on-the-fly. With jakarta vfs or even gnome vfs you will have to save that on the disk first and the do a second vfs open. Regards, Mladen. > Virtual File System service > --------------------------- > > Key: JBMICROCONT-4 > URL: http://jira.jboss.com/jira/browse/JBMICROCONT-4 > Project: JBoss MicroContainer > Type: Feature Request > Reporter: Ivelin Ivanov > Assignee: Dimitris Andreadis > Priority: Critical > Fix For: JBossMC_1_0_0M2 > > > [Adrian] > Ok, here is the design I have in mind for the new deployer aspects. > This will be part of JBoss Kernel M2 release due by end of January. > Deploying Deployers: > First you have to be able to deploy a deployer. Not an easy task as I imagine > the deployer will have dependencies on other services. The aim will be to > minimize > these dependencies to ease the problem. > Basic Architecture: > The basic architecture of the aspectized deployer is that the deployments > work with a tree of DeploymentInfo objects just like the deployers do now. > There are two major differences: > 1) The deployers do not deal with urls, they deal with VFS contexts > 2) The deployers do not create objects directly, instead they create kernel > MetaData objects and submit them to the kernel for instantiation/configuration > to obtain correct ordering of startup/shutdown > Deployment Mode: > The deployers work in two different modes > 1) The first step is to ask who recognises the VFS context. This is so > the responsible deployer can correctly decide which part of the context > takes part in the classloading and where the metadata is located. > Additionally, this may introduce subdeployments (VFS contexts) if the > deployment allows/contains them. > 2) The second step (the main chain) allows each deployer to augment the > kernel metadata with its own config. > Deployer Ordering: > Since the deployers are working on a metadata model rather than > constructing objects directly, there should be less problem with ordering. > Most ordering will be in the classloader/instantiation/config stage, > the deployer should insert that ordering in the form of dependencies in the > metadata. > The only ordering required of the deployer chain is where one deployer > needs to work on the kernel metadata output of another deployer. > Killing two birds with one stone: > The problems mentioned with the deployer requiring other services > and the first tasks performed by package specific deployers, > i.e. identifying the deployment and its structure > can be easily solved by splitting the deployers into two classes > 1) A structural component that says "I recognise this deployment and this is > how it is structured" > 2) An interpretive component that creates the kernel metadata from the > package. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://jira.jboss.com/jira/secure/Administrators.jspa - If you want more information on JIRA, or have a bug to report see: http://www.atlassian.com/software/jira ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://productguide.itmanagersjournal.com/ _______________________________________________ JBoss-Development mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-development
