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Posted to dev@jackrabbit.apache.org by "Thomas Mueller (JIRA)" <ji...@apache.org> on 2008/01/24 17:12:35 UTC

[jira] Created: (JCR-1344) Unsynchronized NameFactoryImpl initialization

Unsynchronized NameFactoryImpl initialization
---------------------------------------------

                 Key: JCR-1344
                 URL: https://issues.apache.org/jira/browse/JCR-1344
             Project: Jackrabbit
          Issue Type: Bug
            Reporter: Thomas Mueller
            Assignee: Thomas Mueller
            Priority: Minor


org.apache.jackrabbit.spi.commons.name.NameFactoryImpl uses an unsafe pattern when initializing:

    private static NameFactory FACTORY;
    private NameFactoryImpl() {};
    public static NameFactory getInstance() {
        if (FACTORY == null) {
            FACTORY = new NameFactoryImpl();
        }
        return FACTORY;
    }

This is bad in a multi-threaded environment (see http://www.ibm.com/developerworks/library/j-dcl.html for details).

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[jira] Updated: (JCR-1344) Unsynchronized NameFactoryImpl initialization

Posted by "Jukka Zitting (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/jira/browse/JCR-1344?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jukka Zitting updated JCR-1344:
-------------------------------

      Component/s: jackrabbit-spi-commons
    Fix Version/s: 1.5
       Issue Type: Improvement  (was: Bug)

It's not really harmful as there's no state in NameFactoryImpl, but I agree that the if statement there is not needed. Better to just initialize the FACTORY constant where it's declared.

> Unsynchronized NameFactoryImpl initialization
> ---------------------------------------------
>
>                 Key: JCR-1344
>                 URL: https://issues.apache.org/jira/browse/JCR-1344
>             Project: Jackrabbit
>          Issue Type: Improvement
>          Components: jackrabbit-spi-commons
>            Reporter: Thomas Mueller
>            Assignee: Thomas Mueller
>            Priority: Minor
>             Fix For: 1.5
>
>
> org.apache.jackrabbit.spi.commons.name.NameFactoryImpl uses an unsafe pattern when initializing:
>     private static NameFactory FACTORY;
>     private NameFactoryImpl() {};
>     public static NameFactory getInstance() {
>         if (FACTORY == null) {
>             FACTORY = new NameFactoryImpl();
>         }
>         return FACTORY;
>     }
> This is bad in a multi-threaded environment (see http://www.ibm.com/developerworks/library/j-dcl.html for details).

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[jira] Resolved: (JCR-1344) Unsynchronized NameFactoryImpl initialization

Posted by "Thomas Mueller (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/jira/browse/JCR-1344?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Thomas Mueller resolved JCR-1344.
---------------------------------

    Resolution: Fixed

Committed in revision 614911

> Unsynchronized NameFactoryImpl initialization
> ---------------------------------------------
>
>                 Key: JCR-1344
>                 URL: https://issues.apache.org/jira/browse/JCR-1344
>             Project: Jackrabbit
>          Issue Type: Bug
>          Components: jackrabbit-spi-commons
>            Reporter: Thomas Mueller
>            Assignee: Thomas Mueller
>            Priority: Minor
>
> org.apache.jackrabbit.spi.commons.name.NameFactoryImpl uses an unsafe pattern when initializing:
>     private static NameFactory FACTORY;
>     private NameFactoryImpl() {};
>     public static NameFactory getInstance() {
>         if (FACTORY == null) {
>             FACTORY = new NameFactoryImpl();
>         }
>         return FACTORY;
>     }
> This is bad in a multi-threaded environment (see http://www.ibm.com/developerworks/library/j-dcl.html for details).

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