Documentation
¶
Overview ¶
Package flaky can be used to emulate flaky GAE errors that happen randomly with some probability.
NOTE: Emulates only datastore errors currently.
To install it:
ctx, fb := featureBreaker.FilterRDS(ctx, nil) fb.BreakFeaturesWithCallback( flaky.Errors(...), featureBreaker.DatastoreFeatures...)
Index ¶
Constants ¶
This section is empty.
Variables ¶
View Source
var ErrFlakyRPCDeadline = errors.New("simulated RPC deadline error")
ErrFlakyRPCDeadline is returned by FlakyErrors to indicate a deadline.
Functions ¶
func Errors ¶
func Errors(params Params) featureBreaker.BreakFeatureCallback
Errors can be used to emulate flaky GAE errors that happen randomly with some probability.
NOTE: Emulates only datastore errors currently.
Types ¶
type Params ¶
type Params struct {
// Rand is a source of pseudo-randomness to use.
//
// It will be accessed under a lock.
//
// By default it is new rand.NewSource(0).
Rand interface {
Int63() int64 // uniformly-distributed pseudo-random value in the range [0, 1<<63)
}
// DeadlineProbability is a probability of ErrFlakyRPCDeadline happening on
// any of the calls that involve RPCs.
//
// Deadline can happen independently of other errors. For example,
// a transaction can fail due to a deadline or due to a commit confict. These
// events are assumed to be independent and their probabilities add up
// accordingly.
//
// Default is 0 (no deadline errors at all).
DeadlineProbability float64
// ConcurrentTransactionProbability is a probability of datastore commit
// returning ErrConcurrentTransaction.
//
// Default is 0 (no commit errors at all).
ConcurrentTransactionProbability float64
}
Params define options for Errors
Source Files
Click to show internal directories.
Click to hide internal directories.