mirror of
https://github.com/letic/terraform-provider-google.git
synced 2024-09-07 09:36:44 +00:00
961c878e0d
Switch to using Go modules. This migrates our vendor.json to use Go 1.11's modules system, and replaces the vendor folder with the output of go mod vendor. The vendored code should remain basically the same; I believe some tree shaking of packages and support scripts/licenses/READMEs/etc. happened. This also fixes Travis and our Makefile to no longer use govendor.
88 lines
2.5 KiB
Go
88 lines
2.5 KiB
Go
/*
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Copyright 2015 Google LLC
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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// Package gax is a snapshot from github.com/googleapis/gax-go with minor modifications.
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package gax
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import (
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"context"
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"log"
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"math/rand"
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"os"
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"time"
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"google.golang.org/grpc"
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"google.golang.org/grpc/codes"
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)
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// Logger is a logger that logs to stderr.
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var Logger = log.New(os.Stderr, "", log.LstdFlags)
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// APICall is a user defined call stub.
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type APICall func(context.Context) error
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// scaleDuration returns the product of a and mult.
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func scaleDuration(a time.Duration, mult float64) time.Duration {
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ns := float64(a) * mult
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return time.Duration(ns)
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}
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// invokeWithRetry calls stub using an exponential backoff retry mechanism
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// based on the values provided in callSettings.
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func invokeWithRetry(ctx context.Context, stub APICall, callSettings CallSettings) error {
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retrySettings := callSettings.RetrySettings
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backoffSettings := callSettings.RetrySettings.BackoffSettings
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delay := backoffSettings.DelayTimeoutSettings.Initial
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for {
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// If the deadline is exceeded...
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if ctx.Err() != nil {
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return ctx.Err()
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}
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err := stub(ctx)
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code := grpc.Code(err)
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if code == codes.OK {
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return nil
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}
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if !retrySettings.RetryCodes[code] {
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return err
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}
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// Sleep a random amount up to the current delay
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d := time.Duration(rand.Int63n(int64(delay)))
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delayCtx, _ := context.WithTimeout(ctx, delay)
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if Logger != nil {
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Logger.Printf("Retryable error: %v, retrying in %v", err, d)
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}
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<-delayCtx.Done()
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delay = scaleDuration(delay, backoffSettings.DelayTimeoutSettings.Multiplier)
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if delay > backoffSettings.DelayTimeoutSettings.Max {
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delay = backoffSettings.DelayTimeoutSettings.Max
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}
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}
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}
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// Invoke calls stub with a child of context modified by the specified options.
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func Invoke(ctx context.Context, stub APICall, opts ...CallOption) error {
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settings := &CallSettings{}
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callOptions(opts).Resolve(settings)
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if len(settings.RetrySettings.RetryCodes) > 0 {
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return invokeWithRetry(ctx, stub, *settings)
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}
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return stub(ctx)
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}
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