[improve][ml] Optimize read entries with skipCondition

[dao-jun]

Motivation

In https://github.com/apache/pulsar/pull/19035 we introduced skipCondition to filter-out delay delivery messages before read entries from Bookkeeper, and in https://github.com/apache/pulsar/pull/21739, we also filter-out deleted(individual acked messages) before read entries.

However, it will lead to one situation: one single segment can be spit into segments. For example: entries to be filter-out: [3, 5, 7] entries to read: [1, 10] then, it will be split into: [[1,2],[4], [6], [8,10]].

In the current implementation, after read [1,2] finished, then begin to read [4], after read [4] finished, then start to read [6]... It will lead to latency increasing, memory(allocated for entries) will also be retained for a longer period of time, and affect the throughput of the system.

Modifications

Verifying this change

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• [ ] Dependencies (add or upgrade a dependency)
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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 91.39785% with 8 lines in your changes are missing coverage. Please review.

Project coverage is 73.12%. Comparing base (bbc6224) to head (ec248c0). Report is 236 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #22560      +/-   ##
============================================
- Coverage     73.57%   73.12%   -0.45%     
- Complexity    32624    32763     +139     
============================================
  Files          1877     1887      +10     
  Lines        139502   141127    +1625     
  Branches      15299    15490     +191     
============================================
+ Hits         102638   103199     +561     
- Misses        28908    29959    +1051     
- Partials       7956     7969      +13     

Flag	Coverage Δ
inttests	27.39% <43.01%> (+2.80%)	:arrow_up:
systests	24.70% <43.01%> (+0.38%)	:arrow_up:
unittests	72.12% <91.39%> (-0.72%)	:arrow_down:

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
...che/bookkeeper/mledger/impl/ManagedCursorImpl.java	79.62% <100.00%> (+0.32%)	:arrow_up:
...rg/apache/bookkeeper/mledger/impl/OpReadEntry.java	84.61% <100.00%> (+0.30%)	:arrow_up:
...che/bookkeeper/mledger/impl/ManagedLedgerImpl.java	81.12% <90.36%> (+0.46%)	:arrow_up:

... and 328 files with indirect coverage changes