exec_profile: Use cluster lbp for exec profiles by default #197
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Lorak-mmk
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v2: Reverted the changes introduced by |
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v3: Rebased on #200. Addressed all of @Lorak-mmk comments |
Lorak-mmk
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`self` is consumed by this method, thus there is no need to match dc_awareness by reference and to clone a local_dc string.
Introduced for multiple reasons: - rack awareness will be introduced soon - preparation for another refactor in next commit.
In this commit, we make `load_balancing_kind` optional in `LoadBalancingConfig`. Now, there are two cases: - for cluster's LBP, there is a default value (round-robin) which driver's going to use if user did not provide LBP. Thus, the `unwrap_or` call in `LoadBalancingConfig::build` - for exec profile's LBP, if user did not provide an LBP kind (load_balancing_kind is None), then, according to cpp-driver, cluster's LBP should be used (instead of some predefined default). After this commit, we are finally consistent with cpp-driver. Now, if user did not specify an LBP for given execution profile, the cluster's default LBP (session-wide LBP) will be assigned to the profile.
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The documentation of
cass_execution_profile_set_load_balance_...functions states:It seems to be true, see: https://github.com/scylladb/cpp-driver/blob/master/src/request_processor.cpp#L196-L209.
We should adjust cpp-rust-driver so it behaves the same way.
This PR consist mostly of some refactor commits that prepare for the logic change in the last commit.
Pre-review checklist
[ ] I have implemented Rust unit tests for the features/changes introduced.[ ] I have enabled appropriate tests in.github/workflows/build.ymlingtest_filter.[ ] I have enabled appropriate tests in.github/workflows/cassandra.ymlingtest_filter.