July 2007 - jboss-dev-forums - Jboss List Archives

[Design the new POJO MicroContainer] - Consider using shorter filenames....

by juha＠jboss.org

... the latest Cygwin update dies with ManagedObjectsWithTransientAttachmentsImplTransientManagedObjectUnitTestCase.java.svn-base': File name too long View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4060085#4060085 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4060085

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[Design of JBossCache] - Re: Optimistic locking doesn't scale well with large 'flat'

by bstansberry＠jboss.com

My last post was in response to your getChildren(Names) question. I've gotten a bit lost about what you meant by your lazy copy idea. But, yes, the use case involves a lot of writes. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4060079#4060079 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4060079

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[Design of JBossCache] - Re: Optimistic locking doesn't scale well with large 'flat'

by bstansberry＠jboss.com

There are such calls, although they are invoked via the Hibernate 2nd level cache statistics API rather than the normal caching mechanism. So, presumably their use would not be frequent. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4060076#4060076 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4060076

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[Design of JBossCache] - Re: Optimistic locking doesn't scale well with large 'flat'

by jason.greene＠jboss.com

anonymous wrote : | anonymous wrote : | | In the entity caching use case, the map is 100% sure to be read, so a lazy copy doesn't gain anything. | | | | To clarify, Does it ever call Node.getChildren() or Node.getChildrenNames? What I was meaning was that a direct node lookup (like "/a/b") can use the actual real node's child map, only a direct child map access by the application would require copying. | Just realized, i am guessing the case you describe does alot of writes though, which would have to force a copy, so this is not a good approach. -Jason View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4060074#4060074 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4060074

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[Design of JBossCache] - Re: Optimistic locking doesn't scale well with large 'flat'

by jason.greene＠jboss.com

"bstansberry(a)jboss.com" wrote : "jason.greene(a)jboss.com" wrote : | | I don't think there is a difference here. Pessimistic locking already allows phantoms by not forcing a write lock when nodes are added/remove. | By default, this is true, but there is a flag to acquire a write lock for node add/remove. anonymous wrote : | | Yes, that's a good point. Since some people might want phantom prevention, and since optimistic locking has it now, we could make the lazy behavior optional, but default to true since isolation doesn't require it. | | anonymous wrote : | | In the entity caching use case, the map is 100% sure to be read, so a lazy copy doesn't gain anything. | | . | | To clarify, Does it ever call Node.getChildren() or Node.getChildrenNames? What I was meaning was that a direct node lookup (like "/a/b") can use the actual real node's child map, only a direct child map access by the application would require copying. | | -Jason View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4060072#4060072 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4060072

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[Design the new POJO MicroContainer] - Re: MC 2.0 tasks

by scott.stark＠jboss.org

anonymous wrote : | 25) http://jira.jboss.com/jira/browse/JBMICROCONT-178: Expand the ManagedObject spi to operations/runtime properties - Scott M Stark | The initial api changes have been done, but needs to be tested more. anonymous wrote : | 26) http://jira.jboss.com/jira/browse/JBMICROCONT-169: Add support for setting the SchemaValidation usage to ObjectModelFactoryDeployer - Scott M Stark | Done, but need a testcase in the mc. anonymous wrote : | 27) http://jira.jboss.com/jira/browse/JBMICROCONT-168: Add a plugin spi to support the ordering of deployment package/bundle processing - Scott M Stark | Needs to be revisted after the current deployer changes to see if we want/need this. The others need to be done for 2.0.0.GA. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4060053#4060053 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4060053

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[Design the new POJO MicroContainer] - Re: MC 2.0 tasks

by scott.stark＠jboss.org

"adrian(a)jboss.org" wrote : "b_georges" wrote : | | Unassigned | | | | anonymous wrote : | | | 43) http://jira.jboss.com/jira/browse/JBMICROCONT-150: VFS callers are missing privileged blocks - Unassigned | | | | | | | I though Scott already did this? | | | Yes, but since the usage that needs to be validated is running jboss5 under a security manager, I have left it open until JBAS-4154 is further fleshed out. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4060047#4060047 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4060047

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[Deployers on JBoss (Deployers/JBoss)] - Re: EJBRegistrationDeployer causes loop!?

by alesj

"alesj" wrote : "alesj" wrote : Carlo, can you send me the inputs / outputs of those deployers. | | Or where to look for them? | Or I can extract them from this stack trace ... What's the initial order? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4060046#4060046 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4060046

16 years, 11 months

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[Design of JBossCache] - Re: Optimistic locking doesn't scale well with large 'flat'

by bstansberry＠jboss.com

"jason.greene(a)jboss.com" wrote : "manik.surtani(a)jboss.com" wrote : trying to get a child node will cache a null in the workspace if the child node doesn't exist - to maintain repeatable_read | | | | Technically we don't have to do this, repeatable read allows phantoms, and they are still possible if the lazy loading occurs after a new child is created. | | anonymous wrote : | | The drawback here is that it allows for s slight difference in semantics from pessimistic locking, due to the lazy locking (copying into workspace) of children . | | | | I don't think there is a difference here. Pessimistic locking already allows phantoms by not forcing a write lock when nodes are added/remove. By default, this is true, but there is a flag to acquire a write lock for node add/remove. anonymous wrote : anonymous wrote : | | Is this approach workable? | | Yes, another option is to just lazy copy the entire map the first time it is actually read. | In the entity caching use case, the map is 100% sure to be read, so a lazy copy doesn't gain anything. In terms of entity caching, this should be workable since lockParentForChildInsertRemove=false for this use case. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4060044#4060044 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4060044

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[Design the new POJO MicroContainer] - Re: MC 2.0 tasks

by scott.stark＠jboss.org

"adrian(a)jboss.org" wrote : "b_georges" wrote : | | Unassigned | | | | anonymous wrote : | | | 41) http://jira.jboss.com/jira/browse/JBMICROCONT-164: JarEntry as VFS root does not return empty vfspath - Unassigned | | | | | | | Ask Scott. | | | Need to look at the testcase to see what the issue is about. Its been assigned to me. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4060040#4060040 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4060040

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jboss-dev-forums July 2007