forked from Shiloh/githaven
60c5339042
* Graceful: Create callbacks to with contexts * Graceful: Say when Gitea is completely finished * Graceful: Git and Process within HammerTime Force all git commands to terminate at HammerTime Force all process commands to terminate at HammerTime Move almost all git processes to run as git Commands * Graceful: Always Hammer after Shutdown * ProcessManager: Add cancel functionality * Fix tests * Make sure that process.Manager.Kill() cancels * Make threadsafe access to Processes and remove own unused Kill * Remove cmd from the process manager as it is no longer used * the default context is the correct context * get rid of double till
91 lines
2.6 KiB
Go
91 lines
2.6 KiB
Go
// Copyright 2019 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package graceful
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import (
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"context"
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"fmt"
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"time"
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)
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// Errors for context.Err()
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var (
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ErrShutdown = fmt.Errorf("Graceful Manager called Shutdown")
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ErrHammer = fmt.Errorf("Graceful Manager called Hammer")
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ErrTerminate = fmt.Errorf("Graceful Manager called Terminate")
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)
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// ChannelContext is a context that wraps a channel and error as a context
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type ChannelContext struct {
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done <-chan struct{}
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err error
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}
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// NewChannelContext creates a ChannelContext from a channel and error
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func NewChannelContext(done <-chan struct{}, err error) *ChannelContext {
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return &ChannelContext{
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done: done,
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err: err,
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}
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}
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// Deadline returns the time when work done on behalf of this context
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// should be canceled. There is no Deadline for a ChannelContext
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func (ctx *ChannelContext) Deadline() (deadline time.Time, ok bool) {
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return
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}
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// Done returns the channel provided at the creation of this context.
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// When closed, work done on behalf of this context should be canceled.
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func (ctx *ChannelContext) Done() <-chan struct{} {
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return ctx.done
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}
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// Err returns nil, if Done is not closed. If Done is closed,
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// Err returns the error provided at the creation of this context
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func (ctx *ChannelContext) Err() error {
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select {
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case <-ctx.done:
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return ctx.err
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default:
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return nil
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}
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}
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// Value returns nil for all calls as no values are or can be associated with this context
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func (ctx *ChannelContext) Value(key interface{}) interface{} {
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return nil
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}
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// ShutdownContext returns a context.Context that is Done at shutdown
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// Callers using this context should ensure that they are registered as a running server
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// in order that they are waited for.
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func (g *gracefulManager) ShutdownContext() context.Context {
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return &ChannelContext{
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done: g.IsShutdown(),
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err: ErrShutdown,
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}
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}
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// HammerContext returns a context.Context that is Done at hammer
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// Callers using this context should ensure that they are registered as a running server
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// in order that they are waited for.
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func (g *gracefulManager) HammerContext() context.Context {
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return &ChannelContext{
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done: g.IsHammer(),
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err: ErrHammer,
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}
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}
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// TerminateContext returns a context.Context that is Done at terminate
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// Callers using this context should ensure that they are registered as a terminating server
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// in order that they are waited for.
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func (g *gracefulManager) TerminateContext() context.Context {
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return &ChannelContext{
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done: g.IsTerminate(),
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err: ErrTerminate,
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}
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}
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