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![Paddy](/assets/img/avatar_default.png)
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.
90 lines
2.8 KiB
Go
90 lines
2.8 KiB
Go
// Copyright 2016, Google Inc.
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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package gax
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import (
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"context"
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"time"
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)
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// A user defined call stub.
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type APICall func(context.Context, CallSettings) error
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// Invoke calls the given APICall,
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// performing retries as specified by opts, if any.
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func Invoke(ctx context.Context, call APICall, opts ...CallOption) error {
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var settings CallSettings
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for _, opt := range opts {
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opt.Resolve(&settings)
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}
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return invoke(ctx, call, settings, Sleep)
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}
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// Sleep is similar to time.Sleep, but it can be interrupted by ctx.Done() closing.
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// If interrupted, Sleep returns ctx.Err().
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func Sleep(ctx context.Context, d time.Duration) error {
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t := time.NewTimer(d)
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select {
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case <-ctx.Done():
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t.Stop()
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return ctx.Err()
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case <-t.C:
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return nil
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}
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}
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type sleeper func(ctx context.Context, d time.Duration) error
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// invoke implements Invoke, taking an additional sleeper argument for testing.
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func invoke(ctx context.Context, call APICall, settings CallSettings, sp sleeper) error {
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var retryer Retryer
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for {
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err := call(ctx, settings)
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if err == nil {
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return nil
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}
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if settings.Retry == nil {
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return err
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}
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if retryer == nil {
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if r := settings.Retry(); r != nil {
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retryer = r
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} else {
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return err
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}
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}
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if d, ok := retryer.Retry(err); !ok {
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return err
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} else if err = sp(ctx, d); err != nil {
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return err
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}
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}
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}
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