Vardhaman SuranaandGitHub
2a40b4538c
- added manager to wait for all go routines to end before exit - code refactor - renamed Manafer to Interface and GoRoutineManager to GroupManager - replaced some go routine calls with manager Add func - added unit tests for manager
63 lines
1.4 KiB
Go
63 lines
1.4 KiB
Go
package manager
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import (
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"context"
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"sync"
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"time"
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)
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var _ Interface = &GroupManager{}
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// Interface keeps track of the go routines in the system and can be used to gracefully shutdown the
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// the system by waiting for completion of go routines added to it.
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type Interface interface {
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// Add will start a go routine for the given "function" and adds it to the list of go routines
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// and will also remove the "function" from the list when it completes
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Add(ctx context.Context, function func(context.Context))
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// Wait blocks the execution of the process until all the go routines in the manager are completed.
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Wait()
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// WaitWithTimeout blocks the execution of the process until timeout or till all all the go routines in the manager are completed
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WaitWithTimeout(timeout time.Duration) error
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}
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type GroupManager struct {
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wg sync.WaitGroup
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}
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func New() Interface {
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return &GroupManager{
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wg: sync.WaitGroup{},
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}
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}
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func (g *GroupManager) Add(ctx context.Context, f func(context.Context)) {
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g.wg.Add(1)
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go func() {
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defer g.wg.Done()
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f(ctx)
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}()
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}
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func (g *GroupManager) Wait() {
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g.wg.Wait()
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}
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func (g *GroupManager) WaitWithTimeout(timeout time.Duration) error {
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ctx, cancel := context.WithTimeout(context.Background(), timeout)
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defer cancel()
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done := make(chan struct{})
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go func() {
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g.wg.Wait()
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close(done)
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}()
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select {
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case <-ctx.Done():
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return ctx.Err()
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case <-done:
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return nil
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}
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}
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