[jboss-jira] [JBoss JIRA] Commented: (JBCACHE-841) Be able to set the internal ordering of child nodes and data keys

Tue Jun 17 15:54:37 EDT 2008

    [ http://jira.jboss.com/jira/browse/JBCACHE-841?page=comments#action_12417661 ] 

Manik Surtani commented on JBCACHE-841:
---------------------------------------

Leaning towards an approach where you can specify if a node contains ordered data or ordered children.  By default this is false.  Can be a cfg option to enable this cache wide.

Node.isDataOrdered(); // tests if the data map is ordered
Node.isChildrenOrdered(); // tests if the child map is ordered
Node.setDataOrdered(boolean b); // locks the map, and then copies out the existing data map into a new ordered map structure
Node.setChildrenOrdered(boolean b); // similar to above

SortedNode sn = Node.getSortedNode(); // retrieves a sub-interface of Node that has added methods.  Throws an exception if the node doesn't have sorted data or children.

> Be able to set the internal ordering of child nodes and data keys
> -----------------------------------------------------------------
>
>                 Key: JBCACHE-841
>                 URL: http://jira.jboss.com/jira/browse/JBCACHE-841
>             Project: JBoss Cache
>          Issue Type: Feature Request
>      Security Level: Public(Everyone can see) 
>            Reporter: Elias Ross
>         Assigned To: Manik Surtani
>             Fix For: 3.0.0
>
>         Attachments: OrderedNode.java
>
>
> I believe that this issue is required to resolve JBCACHE-166 satisfactorily.
> But it would also be a useful (and easily added) feature for JBossCache 2.0.
> The attached .java file explains two additional methods to add.
> The internal implementation would likely need to rely on the JDK1.6 java.util.concurrent.ConcurrentSkipListSet and Map implementations to work without change to other code that rely on iteration to work on concurrently modified sets.
> As JDK 1.6 is new, this might require use of http://dcl.mathcs.emory.edu/util/backport-util-concurrent/doc/api/ for now, or support from the jbossretro to change these JDK1.6 classes to use the backport for 1.5.

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