Revision d7b268ab3264b892c4477cf8af30fb78c2694748 authored by herman on 03 December 2019, 10:25:49 UTC, committed by herman on 03 December 2019, 10:25:49 UTC
### What changes were proposed in this pull request? Observable metrics are named arbitrary aggregate functions that can be defined on a query (Dataframe). As soon as the execution of a Dataframe reaches a completion point (e.g. finishes batch query or reaches streaming epoch) a named event is emitted that contains the metrics for the data processed since the last completion point. A user can observe these metrics by attaching a listener to spark session, it depends on the execution mode which listener to attach: - Batch: `QueryExecutionListener`. This will be called when the query completes. A user can access the metrics by using the `QueryExecution.observedMetrics` map. - (Micro-batch) Streaming: `StreamingQueryListener`. This will be called when the streaming query completes an epoch. A user can access the metrics by using the `StreamingQueryProgress.observedMetrics` map. Please note that we currently do not support continuous execution streaming. ### Why are the changes needed? This enabled observable metrics. ### Does this PR introduce any user-facing change? Yes. It adds the `observe` method to `Dataset`. ### How was this patch tested? - Added unit tests for the `CollectMetrics` logical node to the `AnalysisSuite`. - Added unit tests for `StreamingProgress` JSON serialization to the `StreamingQueryStatusAndProgressSuite`. - Added integration tests for streaming to the `StreamingQueryListenerSuite`. - Added integration tests for batch to the `DataFrameCallbackSuite`. Closes #26127 from hvanhovell/SPARK-29348. Authored-by: herman <herman@databricks.com> Signed-off-by: herman <herman@databricks.com>
1 parent 075ae1e
LICENSE-respond.txt
Copyright (c) 2012 Scott Jehl
Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation
files (the "Software"), to deal in the Software without
restriction, including without limitation the rights to use,
copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following
conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.
Computing file changes ...
