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https://issues.apache.org/jira/browse/SQOOP-1603?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14180255#comment-14180255
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Jarek Jarcec Cecho commented on SQOOP-1603:
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I guess that you can blame me for this one for choosing confusing name :) Even
thought that we're calling it a "destroyer" it's modeled after MapReduce's
OutputCommitter, where you are enabled to do any "finish" work for the
transfer. "Committing data", moving them from temporary directories to final
one are expected operations.
> Sqoop2: Explicit support for Merge in the Sqoop Job lifecyle
> --------------------------------------------------------------
>
> Key: SQOOP-1603
> URL: https://issues.apache.org/jira/browse/SQOOP-1603
> Project: Sqoop
> Issue Type: Bug
> Reporter: Veena Basavaraj
> Assignee: Qian Xu
>
> This ticket was created while reviewing the Kite Connector use case where the
> destroyer does the actual temp data set merge
> https://reviews.apache.org/r/26963/diff/# [~stanleyxu2005]
> {code}
> public void destroy(DestroyerContext context, LinkConfiguration link,
> ToJobConfiguration job) {
> LOG.info("Running Kite connector destroyer");
> // Every loader instance creates a temporary dataset. If the MR job is
> // successful, all temporary dataset should be merged as one dataset,
> // otherwise they should be deleted all.
> String[] uris = KiteDatasetExecutor.listTemporaryDatasetUris(
> job.toDataset.uri);
> if (context.isSuccess()) {
> KiteDatasetExecutor executor = new
> KiteDatasetExecutor(job.toDataset.uri,
> context.getSchema(), link.link.fileFormat);
> for (String uri : uris) {
> executor.mergeDataset(uri);
> LOG.info(String.format("Temporary dataset %s merged", uri));
> }
> } else {
> for (String uri : uris) {
> KiteDatasetExecutor.deleteDataset(uri);
> LOG.info(String.format("Temporary dataset %s deleted", uri));
> }
> }
> }
> {code}
> Wondering if such things should be its own phase rather than in destroyers.
> The responsibility of destroyer is more to clean up/ closing/ anything thats
> pretty much destroying, should such operations that modify records its own
> step.
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