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go/vt/discovery: configurable logger
Signed-off-by: Max Englander <max@planetscale.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,67 @@ | ||
| /* | ||
| Copyright 2025 The Vitess Authors. | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
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| package discovery | ||
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| import ( | ||
| "vitess.io/vitess/go/vt/logutil" | ||
| ) | ||
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| // discoveryOptions configure a discovery components. discoveryOptions are set | ||
| // by the DiscoveryOption values passed to the component constructors. | ||
| type discoveryOptions struct { | ||
| logger logutil.Logger | ||
| } | ||
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| // DiscoveryOption configures how we perform certain operations. | ||
| type DiscoveryOption interface { | ||
| apply(*discoveryOptions) | ||
| } | ||
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| // funcDiscoveryOption wraps a function that modifies discoveryOptions into | ||
| // an implementation of the DiscoveryOption interface. | ||
| type funcDiscoveryOption struct { | ||
| f func(*discoveryOptions) | ||
| } | ||
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| func defaultOptions() discoveryOptions { | ||
| return discoveryOptions{ | ||
| logger: logutil.NewConsoleLogger(), | ||
| } | ||
| } | ||
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| func withOptions(dos ...DiscoveryOption) discoveryOptions { | ||
| os := defaultOptions() | ||
| for _, do := range dos { | ||
| do.apply(&os) | ||
| } | ||
| return os | ||
| } | ||
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| func (fhco *funcDiscoveryOption) apply(dos *discoveryOptions) { | ||
| fhco.f(dos) | ||
| } | ||
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| func newFuncDiscoveryOption(f func(*discoveryOptions)) *funcDiscoveryOption { | ||
| return &funcDiscoveryOption{ | ||
| f: f, | ||
| } | ||
| } | ||
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| // WithLogger accepts a custom logger to use in a discovery component. If this | ||
| // option is not provided then the default system logger will be used. | ||
| func WithLogger(l logutil.Logger) DiscoveryOption { | ||
| return newFuncDiscoveryOption(func(o *discoveryOptions) { | ||
| o.logger = l | ||
| }) | ||
| } |
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