[ML] Instrument Data Frame Analysis Job to report state information to Java backend #978
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…o Java backend (elastic#906) In this PR I introduce a new class CDataFrameAnalysisState, which is responsible for centralized collection of statistics related to the data frame analytics jobs, i.e. progress, memory usage, etc. Hence, the related variables are also moved out of CDataFrameAnalysisRunner class. Right now we have two callback functions related to the job state: progressRecorder and memoryUsageRecorder. However, since we can expect that every new kind of statistics (quality of results, time, parameters) would require another update callback function in maths classes, I pass the reference to the State object. To avoid dependency from maths to api, I introduce a state interface class owned by maths.
valeriy42
added
>non-issue
:ml
backport
v7.7.0
>enhancement
>feature
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Backport to #906