[seam-issues] [JBoss JIRA] (JBSEAM-4861) Component.java uses application wide factoryLock too often

[ahus1 (Updated) (JIRA)]

     [ https://issues.jboss.org/browse/JBSEAM-4861?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ahus1 updated JBSEAM-4861:
--------------------------

    Attachment: Component.patch


updated w/ most recent conditions
                
> Component.java uses application wide factoryLock too often 
> -----------------------------------------------------------
>
>                 Key: JBSEAM-4861
>                 URL: https://issues.jboss.org/browse/JBSEAM-4861
>             Project: Seam 2
>          Issue Type: Patch
>          Components: Core
>    Affects Versions: 2.2.2.Final, 2.3.0.ALPHA
>            Reporter: ahus1
>         Attachments: Component.patch, Component.patch
>
>
> Whenever getInstanceFromFactory() is called and a factory is used, a (application wide) lock is used: factoryLock.
> In my environments the Factory uses expensive calls to the backend to create an object, and during this time no other Factory method is allowed to be called. This is a severe bottleneck in a multiuser environment. 
> This lock is important for APPLICATION scoped components, but other components that are i.e. CONVERSATION scoped, Seam already ensures that only one Thread has access to the current conversation. The same should be true for PAGE and EVENT. In this cases no lock should be acquired.
> See the follwing code snippet. I also attach a patch. 
> I tested the patch for Seam 2.2.2.Final - I would be most happy to have this included in 2.2 and 2.3 branch.
> Br Alexander.
>         ScopeType s = getOutScope(factoryMethod.getScope(),
>             factoryMethod.getComponent());
>         if (s != ScopeType.CONVERSATION && s != ScopeType.EVENT
>             && s != ScopeType.PAGE) {
>           factoryLock.lock();
>         }
>         try {
>         /*  ****  */
>         } finally {
>           if (s != ScopeType.CONVERSATION && s != ScopeType.EVENT
>               && s != ScopeType.PAGE) {
>             factoryLock.unlock();
>           }
>         }
>     

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