[ http://issues.apache.org/jira/browse/JCR-616?page=comments#action_12451306 ] angela commented on JCR-616: ----------------------------
i committed the patch with some modifications as a short term solution. form my point of view, the patch addresses the problem only partially: before throwing NamespaceException upon getPrefix and getURI the current solution checks if the NamespaceRegistry is really up to date. however: - NamespaceRegistry.getURIs and NamespaceRegistry.getPrefixes will not return all prefixes/uris registered on the server, unless getPrefix or getURI has been called. - reregistering of a existing URI with a new prefix might not be detected - unregistering of an existing namespace will never result in an update of other NamespacRegistries but cause failures later on, when the API user relies on the NamespaceRegistry, which is outdated. i'd say, that we need to come up with some notification approach (maybe related to the CacheBehaviour recently introduced) that addresses the problem. for the time being, reloading the mappings defined on the server might be an acceptable workaround. > Completeness/Freshness of Namespace Registry > -------------------------------------------- > > Key: JCR-616 > URL: http://issues.apache.org/jira/browse/JCR-616 > Project: Jackrabbit > Issue Type: Bug > Components: SPI > Reporter: Julian Reschke > Attachments: diffs.txt > > > We need to define the requirements on completeness and freshness of > RepositoryService.getRegisteredNamespaces(). > Right now the optimistic assumption seems to be that an SPI provider is able > to report all namespaces that can occur in a repository beforehand. Even if > it can do that (and I know of potential targets for SPI that simply can't), > this seems to be quite a waste of time if these namespace prefixes aren't > actually used later on. > Furthermore, in SPI namespace prefixes aren't really relevant, except to > enable the transient layer to return "meaningful" prefixes instead of > automatically generated ones. > Therefore my propoal would be to: > 1) Clarify that the Map returned from getRegisteredNamespaces() isn't > required to be complete, > 2) Enhance JCR2SPI to auto-generate prefixes when it encounters namespaces > not in the registry. > I expect this to also affect RepositoryService.(un)registerNamespace(...), > but let's discuss the underlying issue first... -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://issues.apache.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira
