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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SLING-7544) Make optimized alias lookup non-blocking
Date Wed, 21 Mar 2018 15:06:00 GMT

    [ https://issues.apache.org/jira/browse/SLING-7544?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16408053#comment-16408053
] 

ASF GitHub Bot commented on SLING-7544:
---------------------------------------

DominikSuess commented on a change in pull request #5: SLING-7544 - improving optimized alias
lookup to not block during int…
URL: https://github.com/apache/sling-org-apache-sling-resourceresolver/pull/5#discussion_r176115729
 
 

 ##########
 File path: src/test/java/org/apache/sling/resourceresolver/impl/mapping/MapEntriesTest.java
 ##########
 @@ -168,6 +172,8 @@ public void test_simple_alias_support() {
         });
 
         mapEntries.doInit();
+        
+        while(!mapEntries.isAliasMapInitialized()){}
 
 Review comment:
   @rombert  - I'll be adding timeout to the Test annotation - this is really kind of a test
hack  to wait for this to complete. I can't see any use case for waiting for the alias map
in reality so I'm a bit hesitant to add logic to the MapEntries class just to trigger some
waiting test. I'll be checking if there is some mockito helper to watch out for a certain
condition to change.

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> Make optimized alias lookup non-blocking
> ----------------------------------------
>
>                 Key: SLING-7544
>                 URL: https://issues.apache.org/jira/browse/SLING-7544
>             Project: Sling
>          Issue Type: Improvement
>          Components: ResourceResolver
>    Affects Versions: Resource Resolver 1.5.36
>            Reporter: Dominik Süß
>            Priority: Major
>
> The implementation of optimized alias lookup as introduced with SLING-2521 blocks CommonResourceResolver activation
while loading aliases to fillup the aliasmap. In case a corresponding index is not present
yet this can lead to full tree traversal while indexing is doing the same in the background.
> The proposed improvements are:
> * making loading of the aliasmap happen asynchronously
> * only use optimized handling as soon as aliasmap is built
> * wait for non traversal index (optional - forced by default, can be turned off for small
datasets)



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