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core: OnExit hooks (#6128)

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* core: OnExit callbacks

* core: Process-global OnExit callbacks
This commit is contained in:
Matt Holt
2024-03-01 09:57:05 -07:00
committed by GitHub
parent de4959fe7b
commit 46c5db92da
2 changed files with 41 additions and 2 deletions
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15
context.go
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@ -44,8 +44,9 @@ type Context struct {
moduleInstances map[string][]Module
cfg *Config
cleanupFuncs []func()
ancestry []Module
cleanupFuncs []func() // invoked at every config unload
exitFuncs []func(context.Context) // invoked at config unload ONLY IF the process is exiting (EXPERIMENTAL)
}
// NewContext provides a new context derived from the given
@ -86,7 +87,8 @@ func (ctx *Context) OnCancel(f func()) {
ctx.cleanupFuncs = append(ctx.cleanupFuncs, f)
}
// Filesystems returns a ref to the FilesystemMap
// Filesystems returns a ref to the FilesystemMap.
// EXPERIMENTAL: This API is subject to change.
func (ctx *Context) Filesystems() FileSystems {
// if no config is loaded, we use a default filesystemmap, which includes the osfs
if ctx.cfg == nil {
@ -95,6 +97,15 @@ func (ctx *Context) Filesystems() FileSystems {
return ctx.cfg.filesystems
}
// OnExit executes f when the process exits gracefully.
// The function is only executed if the process is gracefully
// shut down while this context is active.
//
// EXPERIMENTAL API: subject to change or removal.
func (ctx *Context) OnExit(f func(context.Context)) {
ctx.exitFuncs = append(ctx.exitFuncs, f)
}
// LoadModule loads the Caddy module(s) from the specified field of the parent struct
// pointer and returns the loaded module(s). The struct pointer and its field name as
// a string are necessary so that reflection can be used to read the struct tag on the