mirror of
https://github.com/ceph/ceph-csi.git
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89 lines
2.5 KiB
Go
89 lines
2.5 KiB
Go
package merry
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import (
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"sync"
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)
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var maxStackDepth = 50
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var captureStacks = true
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// StackCaptureEnabled returns whether stack capturing is enabled.
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func StackCaptureEnabled() bool {
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return captureStacks
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}
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// SetStackCaptureEnabled sets stack capturing globally. Disabling stack capture can increase performance.
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// Capture can be forced or suppressed to override this global setting on a particular error.
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func SetStackCaptureEnabled(enabled bool) {
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captureStacks = enabled
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}
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// MaxStackDepth returns the number of frames captured in stacks.
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func MaxStackDepth() int {
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return maxStackDepth
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}
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// SetMaxStackDepth sets the MaxStackDepth.
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func SetMaxStackDepth(depth int) {
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maxStackDepth = depth
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}
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func init() {
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RegisterDetail("User Message", errKeyUserMessage)
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RegisterDetail("HTTP Code", errKeyHTTPCode)
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}
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var detailsLock sync.Mutex
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var detailFields = map[string]func(err error) interface{}{}
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// RegisterDetail registers an error property key in a global registry, with a label.
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// See RegisterDetailFunc. This function just wraps a call to Value(key) and passes
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// it to RegisterDetailFunc.
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func RegisterDetail(label string, key interface{}) {
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RegisterDetailFunc(label, func(err error) interface{} {
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return Value(err, key)
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})
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}
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// RegisterDetailFunc registers a label and a function for extracting a value from
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// an error. When formatting errors produced by this package using the
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// `%+v` placeholder, or when using Details(), these functions will be called
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// on the error, and any non-nil values will be added to the text.
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// For example:
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//
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// err := New("boom")
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// err = err.WithValue(colorKey, "red")
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// fmt.Println(Details(err))
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//
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// // Output:
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// // boom
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// //
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// // <stacktrace>
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//
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// func Color(err) string {
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// s, _ := Value(err, colorKey)
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// return s
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// }
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//
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// RegisterDetailFunc("color", Color)
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// fmt.Println(Details(err))
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//
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// // Output:
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// // boom
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// // color: red
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// //
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// // <stacktrace>
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//
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// Error property keys are typically not exported by the packages which define them.
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// Packages instead export functions which let callers access that property.
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// It's therefore up to the package
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// to register those properties which would make sense to include in the Details() output.
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// In other words, it's up to the author of the package which generates the errors
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// to publish printable error details, not the callers of the package.
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func RegisterDetailFunc(label string, f func(err error) interface{}) {
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detailsLock.Lock()
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defer detailsLock.Unlock()
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detailFields[label] = f
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}
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