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component.go
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component.go
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// Copyright 2021 rex lv
//
// 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.
package component
import "github.com/douyu/jupiter/pkg/core/metric"
type Component interface {
// Start blocks until the channel is closed or an error occurs.
// The component will stop running when the channel is closed.
Start(<-chan struct{}) error
ShouldBeLeader() bool
}
var _ Component = ComponentFunc(nil)
type ComponentFunc func(<-chan struct{}) error
func (f ComponentFunc) Start(stop <-chan struct{}) error {
return f(stop)
}
func (f ComponentFunc) ShouldBeLeader() bool {
return false
}
// Component manager, aggregate multiple components to one
type Manager interface {
Component
AddComponent(...Component) error
}
// Component builder, build component with injecting govern plugin
type Builder interface {
WithComponentManager(Manager) Builder
WithMetrics(metric.Metrics) Builder
Build() Component
}