Create abstract implementations of basic channel/transaction semantics
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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
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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