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a1c97f82a6
Add OnRestartFailed to the ready plugin and some various cleanups.
Document slightly better how things are supposed to work with multiple
`ready`'s in the multiple Server Blocks.
All manually tested with this Corefile:
~~~
. {
log
ready
}
example.org {
log
chaos
ready
}
~~~
And then `kill -SIGUSR1` and curling the ready endpoint. This works
well, the FailedReload is triggered by adding a syntax error in the
Corefile.
See #2659
Signed-off-by: Miek Gieben <miek@miek.nl>
47 lines
967 B
Go
47 lines
967 B
Go
// Package uniq keeps track of "thing" that are either "todo" or "done". Multiple
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// identical events will only be processed once.
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package uniq
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// U keeps track of item to be done.
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type U struct {
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u map[string]item
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}
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type item struct {
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state int // either todo or done
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f func() error // function to be executed.
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}
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// New returns a new initialized U.
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func New() U { return U{u: make(map[string]item)} }
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// Set sets function f in U under key. If the key already exists it is not overwritten.
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func (u U) Set(key string, f func() error) {
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if _, ok := u.u[key]; ok {
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return
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}
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u.u[key] = item{todo, f}
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}
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// Unset removes the key.
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func (u U) Unset(key string) {
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delete(u.u, key)
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}
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// ForEach iterates over u and executes f for each element that is 'todo' and sets it to 'done'.
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func (u U) ForEach() error {
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for k, v := range u.u {
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if v.state == todo {
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v.f()
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}
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v.state = done
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u.u[k] = v
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}
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return nil
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}
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const (
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todo = 1
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done = 2
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)
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