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https://issues.apache.org/jira/browse/TINKERPOP-1568?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16968377#comment-16968377
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ASF GitHub Bot commented on TINKERPOP-1568:
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spmallette commented on pull request #1211: TINKERPOP-1568 Changed Strategy
Application Methodology
URL: https://github.com/apache/tinkerpop/pull/1211
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> Change strategy application order
> ---------------------------------
>
> Key: TINKERPOP-1568
> URL: https://issues.apache.org/jira/browse/TINKERPOP-1568
> Project: TinkerPop
> Issue Type: Improvement
> Components: process
> Affects Versions: 3.2.3
> Reporter: Bryn Cooke
> Priority: Major
> Labels: breaking
>
> Given a traversal with the structure:
> a(b(),c(d()))
> Strategies are applied in the order:
> {noformat}
> StrategyA on a
> StrategyB on a
> StrategyA on b
> StrategyB on b
> StrategyA on c
> StrategyB on c
> StrategyA on d
> StrategyB on d
> {noformat}
> This prevents strategies from performing global operations across the
> traversal and all decedents effectively as children will not have been
> processed by preceding strategies yet.
> Say you want a strategy that compresses the entire traversal in to a string
> for sending over the wire, you want this to happen after everything else, but
> traversals with children will not have had their children processed.
> Ideally strategy application would be as follows:
> {noformat}
> StrategyA on a
> StrategyA on b
> StrategyA on c
> StrategyA on d
> StrategyB on a
> StrategyB on b
> StrategyB on c
> StrategyB on d
> {noformat}
> That way strategy B can check if it is being applied to the root traversal
> and if it is it knows that A has been applied globally.
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