[fix][common] TopicName: Throw IllegalArgumentException if localName is whitespace only

[pdolif]

Fixes #23690

Motivation

When creating a consumer with the topic name only being a whitespace we get:

java.lang.IllegalArgumentException: topicNames cannot have blank topic

That's why I expect TopicName.get(" ") to throw an exception too.

Modifications

Throw exception if localName is blank.

Verifying this change

• Make sure that the change passes the CI checks.

This change added tests and can be verified as follows:

• Added a test with " " as the topic name.

Does this pull request potentially affect one of the following parts:

If the box was checked, please highlight the changes

• Dependencies (add or upgrade a dependency)
• The public API
• The schema
• The default values of configurations
• The threading model
• The binary protocol
• The REST endpoints
• The admin CLI options
• The metrics
• Anything that affects deployment

Documentation

• doc
• doc-required
• doc-not-needed
• doc-complete

Matching PR in forked repository

PR in forked repository: pdolif#5

[lhotari]

LGTM

[pdolif]

/pulsarbot rerun-failure-checks

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.75%. Comparing base (bbc6224) to head (8b3da9b).
Report is 797 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #23691      +/-   ##
============================================
+ Coverage     73.57%   73.75%   +0.17%     
- Complexity    32624    34285    +1661     
============================================
  Files          1877     1945      +68     
  Lines        139502   150723   +11221     
  Branches      15299    17033    +1734     
============================================
+ Hits         102638   111160    +8522     
- Misses        28908    30971    +2063     
- Partials       7956     8592     +636     

Flag	Coverage Δ
inttests	27.25% <0.00%> (+2.66%)	⬆️
systests	24.64% <0.00%> (+0.31%)	⬆️
unittests	73.14% <100.00%> (+0.29%)	⬆️

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

Files with missing lines	Coverage Δ
...ava/org/apache/pulsar/common/naming/TopicName.java	95.45% <100.00%> (-0.61%)	⬇️

... and 679 files with indirect coverage changes