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From "Jaromir Hamala (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DIRECTMEMORY-124) Create an utility class Iterable<V> over Cache<K,V>
Date Wed, 06 Feb 2013 15:05:13 GMT

    [ https://issues.apache.org/jira/browse/DIRECTMEMORY-124?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13572470#comment-13572470
] 

Jaromir Hamala commented on DIRECTMEMORY-124:
---------------------------------------------

Hi Tomamaso, this is my idea of iterator implementation:


private V nextValue;  //must be initialized, probably in a construcotr

hasNext() {
  return nextValue!=null;
}

next() {
  if (nextValue == null) throw new NoSuchElEx(...
  V currentValue = nextValue;
  nextValue = findNextValidValue();
  return currentValue;
}
                
> Create an utility class Iterable<V> over Cache<K,V> 
> ----------------------------------------------------
>
>                 Key: DIRECTMEMORY-124
>                 URL: https://issues.apache.org/jira/browse/DIRECTMEMORY-124
>             Project: Apache DirectMemory
>          Issue Type: Improvement
>          Components: core
>    Affects Versions: 0.1-incubating
>            Reporter: Tommaso Teofili
>            Assignee: Tommaso Teofili
>            Priority: Minor
>             Fix For: 0.2
>
>
> That'd be useful to iterate over cache values and at the same time avoid loading such
items into memory all together.
> E.g. I'm using DM to keep a huge list of graph vertices without spending too much memory,
but then I need at some point to iterate over them.

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