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Dynamic ratelimiter factories (#5455)
* Introduced different factories for the different cases, and added tests for them * Documentation * make copyright
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// The MIT License (MIT) | ||
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// Copyright (c) 2017-2020 Uber Technologies Inc. | ||
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// Permission is hereby granted, free of charge, to any person obtaining a copy | ||
// of this software and associated documentation files (the "Software"), to deal | ||
// in the Software without restriction, including without limitation the rights | ||
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
// copies of the Software, and to permit persons to whom the Software is | ||
// furnished to do so, subject to the following conditions: | ||
// | ||
// The above copyright notice and this permission notice shall be included in all | ||
// copies or substantial portions of the Software. | ||
// | ||
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
// SOFTWARE. | ||
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package quotas | ||
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import "github.com/uber/cadence/common/dynamicconfig" | ||
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// LimiterFactory is used to create a Limiter for a given domain | ||
// the created Limiter will use the primary dynamic config if it is set | ||
// otherwise it will use the secondary dynamic config | ||
func NewFallbackDynamicRateLimiterFactory( | ||
primary dynamicconfig.IntPropertyFnWithDomainFilter, | ||
secondary dynamicconfig.IntPropertyFn, | ||
) LimiterFactory { | ||
return fallbackDynamicRateLimiterFactory{ | ||
primary: primary, | ||
secondary: secondary, | ||
} | ||
} | ||
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type fallbackDynamicRateLimiterFactory struct { | ||
primary dynamicconfig.IntPropertyFnWithDomainFilter | ||
// secondary is used when primary is not set | ||
secondary dynamicconfig.IntPropertyFn | ||
} | ||
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// GetLimiter returns a new Limiter for the given domain | ||
func (f fallbackDynamicRateLimiterFactory) GetLimiter(domain string) Limiter { | ||
return NewDynamicRateLimiter(func() float64 { | ||
return limitWithFallback( | ||
float64(f.primary(domain)), | ||
float64(f.secondary())) | ||
}) | ||
} | ||
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func limitWithFallback(primary, secondary float64) float64 { | ||
if primary > 0 { | ||
return primary | ||
} | ||
return secondary | ||
} |
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// The MIT License (MIT) | ||
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||
// Copyright (c) 2017-2020 Uber Technologies Inc. | ||
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||
// Permission is hereby granted, free of charge, to any person obtaining a copy | ||
// of this software and associated documentation files (the "Software"), to deal | ||
// in the Software without restriction, including without limitation the rights | ||
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
// copies of the Software, and to permit persons to whom the Software is | ||
// furnished to do so, subject to the following conditions: | ||
// | ||
// The above copyright notice and this permission notice shall be included in all | ||
// copies or substantial portions of the Software. | ||
// | ||
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
// SOFTWARE. | ||
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package quotas | ||
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import ( | ||
"testing" | ||
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"github.com/stretchr/testify/assert" | ||
"github.com/uber/cadence/common/dynamicconfig" | ||
) | ||
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func TestNewFallbackDynamicRateLimiterFactory(t *testing.T) { | ||
factory := NewFallbackDynamicRateLimiterFactory( | ||
func(string) int { return 2 }, | ||
func(opts ...dynamicconfig.FilterOption) int { return 100 }, | ||
) | ||
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limiter := factory.GetLimiter("TestDomainName") | ||
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// The limiter should accept 2 requests per second | ||
assert.Equal(t, true, limiter.Allow()) | ||
assert.Equal(t, true, limiter.Allow()) | ||
assert.Equal(t, false, limiter.Allow()) | ||
} | ||
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func TestNewFallbackDynamicRateLimiterFactoryFallback(t *testing.T) { | ||
factory := NewFallbackDynamicRateLimiterFactory( | ||
func(string) int { return 0 }, | ||
func(opts ...dynamicconfig.FilterOption) int { return 2 }, | ||
) | ||
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limiter := factory.GetLimiter("TestDomainName") | ||
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// The limiter should accept 2 requests per second | ||
assert.Equal(t, true, limiter.Allow()) | ||
assert.Equal(t, true, limiter.Allow()) | ||
assert.Equal(t, false, limiter.Allow()) | ||
} |
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