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https://issues.apache.org/jira/browse/FLUME-935?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13196676#comment-13196676
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Juhani Connolly commented on FLUME-935:
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I had a look at this, and was wondering about a couple of things:
1) close doesn't check the nestingDepth, and the doc says that doClose will
only be called on the outermost transactions. As is, it will get called on
every call to doClose.
2) The semantics imply that a single call to commit/rollback will apply to all
entries in the current transaction. This is expected behaviour, right?
Looks good though. I think I'll be basing work in 936 around this as it
solidifies the expected semantics(assuming that 2 is the expected behavior)
> Create abstract implementations of basic channel/transaction semantics
> ----------------------------------------------------------------------
>
> Key: FLUME-935
> URL: https://issues.apache.org/jira/browse/FLUME-935
> Project: Flume
> Issue Type: Improvement
> Components: Channel
> Reporter: Peter Newcomb
> Assignee: Peter Newcomb
> Priority: Minor
> Fix For: v1.1.0
>
>
> Correctly executing or checking the state transitions for channels and
> transactions is nontrivial. It would be helpful to have a correct
> implementation of each that can be used either directly or as a reference
> when creating new channels or clients of channels.
> Specifically, on the client side it would be nice to package the try {
> begin() ... commit() } catch { rollback() } finally { close() } code, with
> all the appropriate exception propagation and logging code, so that it need
> not be repeated constantly.
> On the channel side, it'd be nice to have a packaged implementation of the
> implied ThreadLocal semantics of the Transaction class, along with
> Preconditions checking to make sure that clients follow the try { begin() ...
> commit() } catch { rollback() } finally { close() } pattern.
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