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Drop Supports' unsupports variable #22898

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merged 1 commit into from
Aug 22, 2024
Merged

Drop Supports' unsupports variable #22898

merged 1 commit into from
Aug 22, 2024

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kbrock
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@kbrock kbrock commented Feb 14, 2024 •
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Overview

Drop class level Model.unsupported. It is modified by every Model.supports?(:feature) call and has a race condition.

Before

  • Setup Model.supports_features hash once at startup. Not modified again.
  • Determine supports?(:feature) from supports_features hash.
  • Call block if necessary and store the result in Model.unsupported hash every time.
  • This is a non-thread-safe race condition.
  • Read and return value from unsupported

After

  • Setup Model.supports_features hash once at startup. Not modified again.
  • Determine supports?(:feature) from supports_features hash.
  • Call unsupported_reason block if necessary, but don't store results in class level variables.
  • Return the result.

Requirements

Depends upon:

precursor:

@kbrock kbrock mentioned this pull request Feb 14, 2024
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@miq-bot miq-bot added the wip label Feb 14, 2024
@kbrock kbrock force-pushed the supports_unsupports branch 2 times, most recently from ae70c63 to 8c5f663 Compare February 23, 2024 02:26
This was referenced Feb 23, 2024
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kbrock commented Mar 1, 2024

update:

  • rebased (fixed unmergable)
  • reduced changes in check_supports

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kbrock commented Mar 7, 2024

update:

  • rebase (fix merge conflicts)

@kbrock kbrock removed the unmergeable label Mar 7, 2024
@kbrock kbrock changed the title [WIP] Drop Supports' unsupports variable Drop Supports' unsupports variable Apr 23, 2024
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kbrock commented Apr 23, 2024

up-wip: still waiting on #22976 - just un-WIPing to show this is good to go

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kbrock commented May 23, 2024

@Fryguy anything special to push this forward? let me know if you want me to split into 2 PRs (for each commit)

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kbrock commented May 24, 2024

update:

  • rebase

This was referenced Jul 1, 2024
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kbrock added a commit to kbrock/manageiq-providers-ibm_power_vc that referenced this pull request Jul 1, 2024
@kbrock
Remove return from supports block
a314621 
Part of ManageIQ/manageiq#22898 (as a followup)

Introduced by ManageIQ/manageiq-providers-ibm_power_hmc#153

You can not have a return in a block. It causes a LongJump error
Besides, it tries to return from inside the calling block - not what we want.
kbrock added a commit to kbrock/manageiq-providers-ibm_power_vc that referenced this pull request Jul 1, 2024
@kbrock
Remove return from supports block
d34ec11 
Part of ManageIQ/manageiq#22898 (as a followup)

Introduced by ManageIQ#103

You can not have a return in a block. It causes a LongJump error
Besides, it tries to return from inside the calling block - not what we want.
@kbrock kbrock mentioned this pull request Jul 1, 2024
Merged
kbrock added a commit to kbrock/manageiq-providers-ibm_power_vc that referenced this pull request Jul 1, 2024
@kbrock
Remove return from supports block
6f86590 
Part of ManageIQ/manageiq#22898 (as a followup)

Introduced by ManageIQ#103

You can not have a return in a block. It causes a LongJump error
Besides, it tries to return from inside the calling block - not what we want.
kbrock added a commit to kbrock/manageiq-providers-ovirt that referenced this pull request Jul 1, 2024
@kbrock
Remove return from supports block
ac2ee1a 
Part of ManageIQ/manageiq#22898 (as a followup)

Introduced by ManageIQ#659

You can not have a return in a block. It causes a LongJump error
Besides, it tries to return from inside the calling block - not what we want.

Fixes a missed unsupported reason check
@kbrock kbrock mentioned this pull request Jul 1, 2024
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kbrock commented Jul 16, 2024

update:

  • rebased

All repos are all ready for this commit

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miq-bot commented Aug 10, 2024

Checked commit kbrock@ce9c449 with ruby 3.1.5, rubocop 1.56.3, haml-lint 0.51.0, and yamllint
1 file checked, 0 offenses detected
Everything looks fine. 🍪

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kbrock commented Aug 10, 2024

update:

  • rebased

@Fryguy Any ideas how to get this over the line? Probably merged 45 PRs to get this far. (though only see 25 listed here). 10/-53 - basically just deleting one class level variable.

kbrock
kbrock commented Aug 20, 2024
View reviewed changes
app/models/mixins/supports_feature_mixin.rb
Comment on lines -104 to 94
def check_supports(feature, instance:)
instance.send(:unsupported).delete(feature)

# query the class if the feature is supported or not
def unsupported_reason(feature, instance: self)
# undeclared features are not supported
value = supports_features[feature.to_sym]

if value.respond_to?(:call)
begin
# for class level supports, blocks are not evaluated and assumed to be true
result = instance.instance_eval(&value) unless instance.kind_of?(Class)
# if no errors yet but result was an error message
# then add the error
if !instance.send(:unsupported).key?(feature) && result.kind_of?(String)
instance.send(:unsupported_reason_add, feature, result)
end
result if result.kind_of?(String)
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@kbrock kbrock Aug 20, 2024 •
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This is the crux of this pr.

Before

When asked, clear unsupported and then setting it with new value.

After

return the value and don't use unsupported

@Fryguy Fryguy merged commit 3f7c1b7 into ManageIQ:master Aug 22, 2024
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@kbrock kbrock deleted the supports_unsupports branch August 23, 2024 02:42
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@Fryguy Fryguy Fryguy approved these changes

@agrare agrare Awaiting requested review from agrare agrare is a code owner

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