[
https://issues.jboss.org/browse/JBSEAM-4997?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Marek Novotny resolved JBSEAM-4997.
-----------------------------------
Resolution: Done
enabled interleaving test and created locking on factoryMethod instead of
factory
> Deadlock with components using factories of each other
> ------------------------------------------------------
>
> Key: JBSEAM-4997
> URL: https://issues.jboss.org/browse/JBSEAM-4997
> Project: Seam 2
> Issue Type: Bug
> Components: Core
> Affects Versions: 2.3.0.BETA2
> Environment: Seam 2.3.0.CR1-SNAPSHOT r14979, AS 7.1.2.Final
> Reporter: Marek Schmidt
> Assignee: Marek Novotny
> Fix For: 2.3.0.CR1
>
>
> The patch in JBSEAM-4861 introduced a potential deadlock with components
> using each other factories, such as in the following sample:
> {code}
> @Scope(ScopeType.APPLICATION)
> @Name("factoryLock.knitFactory")
> public static class KnitFactory
> {
> @Factory(value="factoryLock.knitPurl", scope=ScopeType.SESSION)
> public String getDoubleKnit() {
> return "knit(" + (String)Component.getInstance("factoryLock.purl") +
> ")";
> }
>
> @Factory(value="factoryLock.knit", scope=ScopeType.SESSION)
> public String getKnit() {
> return "knit";
> }
> }
>
> @Scope(ScopeType.APPLICATION)
> @Name("factoryLock.purlFactory")
> public static class PurlFactory
> {
> @Factory(value="factoryLock.purlKnit", scope=ScopeType.SESSION)
> public String getDoublePurl() {
> return "purl(" + (String)Component.getInstance("factoryLock.knit") +
> ")";
> }
>
> @Factory(value="factoryLock.purl", scope=ScopeType.SESSION)
> public String getPurl() {
> return "purl";
> }
> }
> {code}
> this may cause a deadlock if two different requests in the same session ask
> for #{factoryLock.knitPurl} and #{factoryLock.purlKnit} respectively.
> The problem is that different threads may lock the components in different
> order.
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