31911ed09e
* Implement missing pieces for connection backoff. Spec can be found here: https://github.com/grpc/grpc/blob/master/doc/connection-backoff.md Summary of changes: * Added a new type (marked experimental), ConnectParams, which contains the knobs defined in the spec (except for minConnectTimeout). * Added a new API (marked experimental), WithConnectParams() to return a DialOption to dial with the provided parameters. * Added new fields to the implementation of the exponential backoff in internal/backoff which mirror the ones in ConnectParams. * Marked existing APIs WithBackoffMaxDelay() and WithBackoffConfig() as deprecated. * Added a default exponential backoff implementation, for easy use of internal callers. Added a new backoff package which defines the backoff configuration options, and is used by both the grpc package and the internal/backoff package. This allows us to have all backoff related options in a separate package.
53 lines
1.7 KiB
Go
53 lines
1.7 KiB
Go
/*
|
|
*
|
|
* Copyright 2019 gRPC authors.
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*
|
|
*/
|
|
|
|
// Package backoff provides configuration options for backoff.
|
|
//
|
|
// More details can be found at:
|
|
// https://github.com/grpc/grpc/blob/master/doc/connection-backoff.md.
|
|
//
|
|
// All APIs in this package are experimental.
|
|
package backoff
|
|
|
|
import "time"
|
|
|
|
// Config defines the configuration options for backoff.
|
|
type Config struct {
|
|
// BaseDelay is the amount of time to backoff after the first failure.
|
|
BaseDelay time.Duration
|
|
// Multiplier is the factor with which to multiply backoffs after a
|
|
// failed retry. Should ideally be greater than 1.
|
|
Multiplier float64
|
|
// Jitter is the factor with which backoffs are randomized.
|
|
Jitter float64
|
|
// MaxDelay is the upper bound of backoff delay.
|
|
MaxDelay time.Duration
|
|
}
|
|
|
|
// DefaultConfig is a backoff configuration with the default values specfied
|
|
// at https://github.com/grpc/grpc/blob/master/doc/connection-backoff.md.
|
|
//
|
|
// This should be useful for callers who want to configure backoff with
|
|
// non-default values only for a subset of the options.
|
|
var DefaultConfig = Config{
|
|
BaseDelay: 1.0 * time.Second,
|
|
Multiplier: 1.6,
|
|
Jitter: 0.2,
|
|
MaxDelay: 120 * time.Second,
|
|
}
|