Merge branch 'backport-reactive-caching' into 'master'
Back port ReactiveCaching See merge request gitlab-org/gitlab-ce!20836
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commit
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@ -59,6 +59,9 @@ module ReactiveCaching
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raise NotImplementedError
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end
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def reactive_cache_updated(*args)
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end
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def with_reactive_cache(*args, &blk)
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bootstrap = !within_reactive_cache_lifetime?(*args)
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Rails.cache.write(alive_reactive_cache_key(*args), true, expires_in: self.class.reactive_cache_lifetime)
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@ -81,8 +84,11 @@ module ReactiveCaching
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locking_reactive_cache(*args) do
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if within_reactive_cache_lifetime?(*args)
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enqueuing_update(*args) do
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value = calculate_reactive_cache(*args)
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Rails.cache.write(full_reactive_cache_key(*args), value)
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key = full_reactive_cache_key(*args)
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new_value = calculate_reactive_cache(*args)
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old_value = Rails.cache.read(key)
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Rails.cache.write(key, new_value)
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reactive_cache_updated(*args) if new_value != old_value
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end
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end
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end
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@ -125,6 +125,13 @@ describe ReactiveCaching, :use_clean_rails_memory_store_caching do
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go!
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end
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it "calls a reactive_cache_updated only once if content did not change on subsequent update" do
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expect(instance).to receive(:calculate_reactive_cache).twice
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expect(instance).to receive(:reactive_cache_updated).once
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2.times { instance.exclusively_update_reactive_cache! }
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end
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context 'and #calculate_reactive_cache raises an exception' do
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before do
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stub_reactive_cache(instance, "preexisting")
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