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Date: Thu, 21 Dec 2006 01:44:22 -0800 (PST)
From: "Jukka Zitting (JIRA)" <jira@apache.org>
To: dev@jackrabbit.apache.org
Subject: [jira] Commented: (JCR-685) Remove some synchronization on
 CachingNamespaceResolver
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    [ http://issues.apache.org/jira/browse/JCR-685?page=comments#action_12460195 ] 
            
Jukka Zitting commented on JCR-685:
-----------------------------------

> i'd rather leave this issue open, the core issue (monitor contention with concurrent read access)
> still exists a thread dumps show. 
>
> the committed fix affected deprecated methods only and doesn't solve the core issue.

The issue title and description only mention the deprecated methods. I'd rather open a separate issue with  a better description of the core problem.

Additionally, from the release and Jira management perspective it's troublesome to have issues that are "partially fixed" in a release.

> Remove some synchronization on CachingNamespaceResolver
> -------------------------------------------------------
>
>                 Key: JCR-685
>                 URL: http://issues.apache.org/jira/browse/JCR-685
>             Project: Jackrabbit
>          Issue Type: Improvement
>          Components: core
>    Affects Versions: 1.1, 1.1.1
>            Reporter: Marcel Reutegger
>            Priority: Minor
>             Fix For: 1.2
>
>         Attachments: CachingNamespaceResolver.patch
>
>
> The methods getQName() and getJCRName() are unnecessarily synchronized and cause monitor contention with concurrent calls to the methods of the NameCache interface (those are also synchronized).
> I propose the following change:
> Index: CachingNamespaceResolver.java
> ===================================================================
> --- CachingNamespaceResolver.java	(revision 488245)
> +++ CachingNamespaceResolver.java	(working copy)
> @@ -84,7 +84,7 @@
>      /**
>       * @deprecated use {@link NameFormat#parse(String, NamespaceResolver)}
>       */
> -    public synchronized QName getQName(String name)
> +    public QName getQName(String name)
>              throws IllegalNameException, UnknownPrefixException {
>          return NameFormat.parse(name, this);
>      }
> @@ -92,7 +92,7 @@
>      /**
>       * @deprecated use {@link NameFormat#format(QName, NamespaceResolver)}
>       */
> -    public synchronized String getJCRName(QName name)
> +    public String getJCRName(QName name)
>              throws NoPrefixDeclaredException {
>          return NameFormat.format(name, this);
>      }

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