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From "willem Jiang (JIRA)" <j...@apache.org>
Subject [jira] Commented: (CXF-323) Improper synchronization of getDefaultBus(), setDefaultBus()
Date Wed, 17 Jan 2007 17:30:30 GMT

    [ https://issues.apache.org/jira/browse/CXF-323?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12465458
] 

willem Jiang commented on CXF-323:
----------------------------------

It could be easy to get the initDefaultBus() to be static synchronized in CXFBusFactory. 
But in SpringBusFactory, there is ApplicationContext which hold the spring configuration is
not static, and I am not going to change it to be a static variable, because we may need to
setup different Context in the same JVM.

Basicly we add the getDefaultBus() in BusFactory interface is we need to make a bridge between
JAXWS API which has no bus to be used and CXF-RT which uses bus for holding the pluggable
extension.  
I think we have too much BusFactory implementations currently. The CXFBusFactory is useless
now, we need to remove it. 

It can make the world more quite now.

Any thoughts?


> Improper synchronization of getDefaultBus(), setDefaultBus()
> ------------------------------------------------------------
>
>                 Key: CXF-323
>                 URL: https://issues.apache.org/jira/browse/CXF-323
>             Project: CXF
>          Issue Type: Bug
>            Reporter: Jarek Gawor
>         Assigned To: willem Jiang
>
> getDefaultBus() method in org.apache.cxf.bus.spring.SpringBusFactory and org.apache.cxf.bus.cxf.CXFBusFactory
is improperly synchronized. The method is instance-level synchronized while it initializes
and accesses a class-level variable. Two different instances of BusFactory each calling getDefaultBus()
at the same time could return two different Bus instances...
> This method should either be changed to 'public static synchronized Bus getDefaultBus()'
or modified as for an example:
> public Bus getDefaultBus() {
>   return initDefaultBus();
> }
> private static synchronized Bus initDefaultBus() {
>   if (null == defaultBus) {
>          defaultBus = new CXFBusImpl();
>   }
>   return defaultBus;
> }
> Also, the setDefaultBus() method in both classes needs to be properly synchronized. 

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