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https://issues.jboss.org/browse/JBSEAM-4861?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ahus1 updated JBSEAM-4861:
--------------------------
Attachment: Component.patch
Patch to fix this in Seam 2.2/2.3
> 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
>
>
> 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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