init server

This commit is contained in:
2021-11-03 14:10:58 +01:00
commit 4f9782785d
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vendor/github.com/googleapis/gax-go/v2/LICENSE generated vendored Normal file
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@@ -0,0 +1,27 @@
Copyright 2016, Google Inc.
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following disclaimer
in the documentation and/or other materials provided with the
distribution.
* Neither the name of Google Inc. nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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@@ -0,0 +1,296 @@
// Copyright 2021, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Package apierror implements a wrapper error for parsing error details from
// API calls. Currently, only errors representing a gRPC status are supported.
package apierror
import (
"fmt"
"strings"
jsonerror "github.com/googleapis/gax-go/v2/apierror/internal/proto"
"google.golang.org/api/googleapi"
"google.golang.org/genproto/googleapis/rpc/errdetails"
"google.golang.org/grpc/status"
"google.golang.org/protobuf/encoding/protojson"
)
// ErrDetails holds the google/rpc/error_details.proto messages.
type ErrDetails struct {
ErrorInfo *errdetails.ErrorInfo
BadRequest *errdetails.BadRequest
PreconditionFailure *errdetails.PreconditionFailure
QuotaFailure *errdetails.QuotaFailure
RetryInfo *errdetails.RetryInfo
ResourceInfo *errdetails.ResourceInfo
RequestInfo *errdetails.RequestInfo
DebugInfo *errdetails.DebugInfo
Help *errdetails.Help
LocalizedMessage *errdetails.LocalizedMessage
// Unknown stores unidentifiable error details.
Unknown []interface{}
}
func (e ErrDetails) String() string {
var d strings.Builder
if e.ErrorInfo != nil {
d.WriteString(fmt.Sprintf("error details: name = ErrorInfo reason = %s domain = %s metadata = %s\n",
e.ErrorInfo.GetReason(), e.ErrorInfo.GetDomain(), e.ErrorInfo.GetMetadata()))
}
if e.BadRequest != nil {
v := e.BadRequest.GetFieldViolations()
var f []string
var desc []string
for _, x := range v {
f = append(f, x.GetField())
desc = append(desc, x.GetDescription())
}
d.WriteString(fmt.Sprintf("error details: name = BadRequest field = %s desc = %s\n",
strings.Join(f, " "), strings.Join(desc, " ")))
}
if e.PreconditionFailure != nil {
v := e.PreconditionFailure.GetViolations()
var t []string
var s []string
var desc []string
for _, x := range v {
t = append(t, x.GetType())
s = append(s, x.GetSubject())
desc = append(desc, x.GetDescription())
}
d.WriteString(fmt.Sprintf("error details: name = PreconditionFailure type = %s subj = %s desc = %s\n", strings.Join(t, " "),
strings.Join(s, " "), strings.Join(desc, " ")))
}
if e.QuotaFailure != nil {
v := e.QuotaFailure.GetViolations()
var s []string
var desc []string
for _, x := range v {
s = append(s, x.GetSubject())
desc = append(desc, x.GetDescription())
}
d.WriteString(fmt.Sprintf("error details: name = QuotaFailure subj = %s desc = %s\n",
strings.Join(s, " "), strings.Join(desc, " ")))
}
if e.RequestInfo != nil {
d.WriteString(fmt.Sprintf("error details: name = RequestInfo id = %s data = %s\n",
e.RequestInfo.GetRequestId(), e.RequestInfo.GetServingData()))
}
if e.ResourceInfo != nil {
d.WriteString(fmt.Sprintf("error details: name = ResourceInfo type = %s resourcename = %s owner = %s desc = %s\n",
e.ResourceInfo.GetResourceType(), e.ResourceInfo.GetResourceName(),
e.ResourceInfo.GetOwner(), e.ResourceInfo.GetDescription()))
}
if e.RetryInfo != nil {
d.WriteString(fmt.Sprintf("error details: retry in %s\n", e.RetryInfo.GetRetryDelay().AsDuration()))
}
if e.Unknown != nil {
var s []string
for _, x := range e.Unknown {
s = append(s, fmt.Sprintf("%v", x))
}
d.WriteString(fmt.Sprintf("error details: name = Unknown desc = %s\n", strings.Join(s, " ")))
}
if e.DebugInfo != nil {
d.WriteString(fmt.Sprintf("error details: name = DebugInfo detail = %s stack = %s\n", e.DebugInfo.GetDetail(),
strings.Join(e.DebugInfo.GetStackEntries(), " ")))
}
if e.Help != nil {
var desc []string
var url []string
for _, x := range e.Help.Links {
desc = append(desc, x.GetDescription())
url = append(url, x.GetUrl())
}
d.WriteString(fmt.Sprintf("error details: name = Help desc = %s url = %s\n",
strings.Join(desc, " "), strings.Join(url, " ")))
}
if e.LocalizedMessage != nil {
d.WriteString(fmt.Sprintf("error details: name = LocalizedMessage locale = %s msg = %s\n",
e.LocalizedMessage.GetLocale(), e.LocalizedMessage.GetMessage()))
}
return d.String()
}
// APIError wraps either a gRPC Status error or a HTTP googleapi.Error. It
// implements error and Status interfaces.
type APIError struct {
err error
status *status.Status
httpErr *googleapi.Error
details ErrDetails
}
// Details presents the error details of the APIError.
func (a *APIError) Details() ErrDetails {
return a.details
}
// Unwrap extracts the original error.
func (a *APIError) Unwrap() error {
return a.err
}
// Error returns a readable representation of the APIError.
func (a *APIError) Error() string {
var msg string
if a.status != nil {
msg = a.err.Error()
} else if a.httpErr != nil {
// Truncate the googleapi.Error message because it dumps the Details in
// an ugly way.
msg = fmt.Sprintf("googleapi: Error %d: %s", a.httpErr.Code, a.httpErr.Message)
}
return strings.TrimSpace(fmt.Sprintf("%s\n%s", msg, a.details))
}
// GRPCStatus extracts the underlying gRPC Status error.
// This method is necessary to fulfill the interface
// described in https://pkg.go.dev/google.golang.org/grpc/status#FromError.
func (a *APIError) GRPCStatus() *status.Status {
return a.status
}
// Reason returns the reason in an ErrorInfo.
// If ErrorInfo is nil, it returns an empty string.
func (a *APIError) Reason() string {
return a.details.ErrorInfo.GetReason()
}
// Domain returns the domain in an ErrorInfo.
// If ErrorInfo is nil, it returns an empty string.
func (a *APIError) Domain() string {
return a.details.ErrorInfo.GetDomain()
}
// Metadata returns the metadata in an ErrorInfo.
// If ErrorInfo is nil, it returns nil.
func (a *APIError) Metadata() map[string]string {
return a.details.ErrorInfo.GetMetadata()
}
// FromError parses a Status error or a googleapi.Error and builds an APIError.
func FromError(err error) (*APIError, bool) {
if err == nil {
return nil, false
}
ae := APIError{err: err}
st, isStatus := status.FromError(err)
herr, isHTTPErr := err.(*googleapi.Error)
switch {
case isStatus:
ae.status = st
ae.details = parseDetails(st.Details())
case isHTTPErr:
ae.httpErr = herr
ae.details = parseHTTPDetails(herr)
default:
return nil, false
}
return &ae, true
}
// parseDetails accepts a slice of interface{} that should be backed by some
// sort of proto.Message that can be cast to the google/rpc/error_details.proto
// types.
//
// This is for internal use only.
func parseDetails(details []interface{}) ErrDetails {
var ed ErrDetails
for _, d := range details {
switch d := d.(type) {
case *errdetails.ErrorInfo:
ed.ErrorInfo = d
case *errdetails.BadRequest:
ed.BadRequest = d
case *errdetails.PreconditionFailure:
ed.PreconditionFailure = d
case *errdetails.QuotaFailure:
ed.QuotaFailure = d
case *errdetails.RetryInfo:
ed.RetryInfo = d
case *errdetails.ResourceInfo:
ed.ResourceInfo = d
case *errdetails.RequestInfo:
ed.RequestInfo = d
case *errdetails.DebugInfo:
ed.DebugInfo = d
case *errdetails.Help:
ed.Help = d
case *errdetails.LocalizedMessage:
ed.LocalizedMessage = d
default:
ed.Unknown = append(ed.Unknown, d)
}
}
return ed
}
// parseHTTPDetails will convert the given googleapi.Error into the protobuf
// representation then parse the Any values that contain the error details.
//
// This is for internal use only.
func parseHTTPDetails(gae *googleapi.Error) ErrDetails {
e := &jsonerror.Error{}
if err := protojson.Unmarshal([]byte(gae.Body), e); err != nil {
// If the error body does not conform to the error schema, ignore it
// altogther. See https://cloud.google.com/apis/design/errors#http_mapping.
return ErrDetails{}
}
// Coerce the Any messages into proto.Message then parse the details.
details := []interface{}{}
for _, any := range e.GetError().GetDetails() {
m, err := any.UnmarshalNew()
if err != nil {
// Ignore malformed Any values.
continue
}
details = append(details, m)
}
return parseDetails(details)
}

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# HTTP JSON Error Schema
The `error.proto` represents the HTTP-JSON schema used by Google APIs to convey
error payloads as described by https://cloud.google.com/apis/design/errors#http_mapping.
This package is for internal parsing logic only and should not be used in any
other context.
## Regeneration
To regenerate the protobuf Go code you will need the following:
* A local copy of [googleapis], the absolute path to which should be exported to
the environment variable `GOOGLEAPIS`
* The protobuf compiler [protoc]
* The Go [protobuf plugin]
* The [goimports] tool
From this directory run the following command:
```sh
protoc -I $GOOGLEAPIS -I. --go_out=. --go_opt=module=github.com/googleapis/gax-go/v2/apierror/internal/proto error.proto
goimports -w .
```
Note: the `module` plugin option ensures the generated code is placed in this
directory, and not in several nested directories defined by `go_package` option.
[googleapis]: https://github.com/googleapis/googleapis
[protoc]: https://github.com/protocolbuffers/protobuf#protocol-compiler-installation
[protobuf plugin]: https://developers.google.com/protocol-buffers/docs/reference/go-generated
[goimports]: https://pkg.go.dev/golang.org/x/tools/cmd/goimports

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// Copyright 2021 Google LLC
//
// 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.
// Code generated by protoc-gen-go. DO NOT EDIT.
// versions:
// protoc-gen-go v1.27.1
// protoc v3.15.8
// source: error.proto
package jsonerror
import (
reflect "reflect"
sync "sync"
code "google.golang.org/genproto/googleapis/rpc/code"
protoreflect "google.golang.org/protobuf/reflect/protoreflect"
protoimpl "google.golang.org/protobuf/runtime/protoimpl"
anypb "google.golang.org/protobuf/types/known/anypb"
)
const (
// Verify that this generated code is sufficiently up-to-date.
_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
// Verify that runtime/protoimpl is sufficiently up-to-date.
_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
)
// The error format v2 for Google JSON REST APIs.
// Copied from https://cloud.google.com/apis/design/errors#http_mapping.
//
// NOTE: This schema is not used for other wire protocols.
type Error struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
unknownFields protoimpl.UnknownFields
// The actual error payload. The nested message structure is for backward
// compatibility with Google API client libraries. It also makes the error
// more readable to developers.
Error *Error_Status `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
}
func (x *Error) Reset() {
*x = Error{}
if protoimpl.UnsafeEnabled {
mi := &file_error_proto_msgTypes[0]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
}
func (x *Error) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*Error) ProtoMessage() {}
func (x *Error) ProtoReflect() protoreflect.Message {
mi := &file_error_proto_msgTypes[0]
if protoimpl.UnsafeEnabled && x != nil {
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
if ms.LoadMessageInfo() == nil {
ms.StoreMessageInfo(mi)
}
return ms
}
return mi.MessageOf(x)
}
// Deprecated: Use Error.ProtoReflect.Descriptor instead.
func (*Error) Descriptor() ([]byte, []int) {
return file_error_proto_rawDescGZIP(), []int{0}
}
func (x *Error) GetError() *Error_Status {
if x != nil {
return x.Error
}
return nil
}
// This message has the same semantics as `google.rpc.Status`. It uses HTTP
// status code instead of gRPC status code. It has an extra field `status`
// for backward compatibility with Google API Client Libraries.
type Error_Status struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
unknownFields protoimpl.UnknownFields
// The HTTP status code that corresponds to `google.rpc.Status.code`.
Code int32 `protobuf:"varint,1,opt,name=code,proto3" json:"code,omitempty"`
// This corresponds to `google.rpc.Status.message`.
Message string `protobuf:"bytes,2,opt,name=message,proto3" json:"message,omitempty"`
// This is the enum version for `google.rpc.Status.code`.
Status code.Code `protobuf:"varint,4,opt,name=status,proto3,enum=google.rpc.Code" json:"status,omitempty"`
// This corresponds to `google.rpc.Status.details`.
Details []*anypb.Any `protobuf:"bytes,5,rep,name=details,proto3" json:"details,omitempty"`
}
func (x *Error_Status) Reset() {
*x = Error_Status{}
if protoimpl.UnsafeEnabled {
mi := &file_error_proto_msgTypes[1]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
}
func (x *Error_Status) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*Error_Status) ProtoMessage() {}
func (x *Error_Status) ProtoReflect() protoreflect.Message {
mi := &file_error_proto_msgTypes[1]
if protoimpl.UnsafeEnabled && x != nil {
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
if ms.LoadMessageInfo() == nil {
ms.StoreMessageInfo(mi)
}
return ms
}
return mi.MessageOf(x)
}
// Deprecated: Use Error_Status.ProtoReflect.Descriptor instead.
func (*Error_Status) Descriptor() ([]byte, []int) {
return file_error_proto_rawDescGZIP(), []int{0, 0}
}
func (x *Error_Status) GetCode() int32 {
if x != nil {
return x.Code
}
return 0
}
func (x *Error_Status) GetMessage() string {
if x != nil {
return x.Message
}
return ""
}
func (x *Error_Status) GetStatus() code.Code {
if x != nil {
return x.Status
}
return code.Code(0)
}
func (x *Error_Status) GetDetails() []*anypb.Any {
if x != nil {
return x.Details
}
return nil
}
var File_error_proto protoreflect.FileDescriptor
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}
var (
file_error_proto_rawDescOnce sync.Once
file_error_proto_rawDescData = file_error_proto_rawDesc
)
func file_error_proto_rawDescGZIP() []byte {
file_error_proto_rawDescOnce.Do(func() {
file_error_proto_rawDescData = protoimpl.X.CompressGZIP(file_error_proto_rawDescData)
})
return file_error_proto_rawDescData
}
var file_error_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
var file_error_proto_goTypes = []interface{}{
(*Error)(nil), // 0: error.Error
(*Error_Status)(nil), // 1: error.Error.Status
(code.Code)(0), // 2: google.rpc.Code
(*anypb.Any)(nil), // 3: google.protobuf.Any
}
var file_error_proto_depIdxs = []int32{
1, // 0: error.Error.error:type_name -> error.Error.Status
2, // 1: error.Error.Status.status:type_name -> google.rpc.Code
3, // 2: error.Error.Status.details:type_name -> google.protobuf.Any
3, // [3:3] is the sub-list for method output_type
3, // [3:3] is the sub-list for method input_type
3, // [3:3] is the sub-list for extension type_name
3, // [3:3] is the sub-list for extension extendee
0, // [0:3] is the sub-list for field type_name
}
func init() { file_error_proto_init() }
func file_error_proto_init() {
if File_error_proto != nil {
return
}
if !protoimpl.UnsafeEnabled {
file_error_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
switch v := v.(*Error); i {
case 0:
return &v.state
case 1:
return &v.sizeCache
case 2:
return &v.unknownFields
default:
return nil
}
}
file_error_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
switch v := v.(*Error_Status); i {
case 0:
return &v.state
case 1:
return &v.sizeCache
case 2:
return &v.unknownFields
default:
return nil
}
}
}
type x struct{}
out := protoimpl.TypeBuilder{
File: protoimpl.DescBuilder{
GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
RawDescriptor: file_error_proto_rawDesc,
NumEnums: 0,
NumMessages: 2,
NumExtensions: 0,
NumServices: 0,
},
GoTypes: file_error_proto_goTypes,
DependencyIndexes: file_error_proto_depIdxs,
MessageInfos: file_error_proto_msgTypes,
}.Build()
File_error_proto = out.File
file_error_proto_rawDesc = nil
file_error_proto_goTypes = nil
file_error_proto_depIdxs = nil
}

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// Copyright 2021 Google LLC
//
// 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.
syntax = "proto3";
package error;
import "google/protobuf/any.proto";
import "google/rpc/code.proto";
option go_package = "github.com/googleapis/gax-go/v2/apierror/internal/proto;jsonerror";
// The error format v2 for Google JSON REST APIs.
// Copied from https://cloud.google.com/apis/design/errors#http_mapping.
//
// NOTE: This schema is not used for other wire protocols.
message Error {
// This message has the same semantics as `google.rpc.Status`. It uses HTTP
// status code instead of gRPC status code. It has an extra field `status`
// for backward compatibility with Google API Client Libraries.
message Status {
// The HTTP status code that corresponds to `google.rpc.Status.code`.
int32 code = 1;
// This corresponds to `google.rpc.Status.message`.
string message = 2;
// This is the enum version for `google.rpc.Status.code`.
google.rpc.Code status = 4;
// This corresponds to `google.rpc.Status.details`.
repeated google.protobuf.Any details = 5;
}
// The actual error payload. The nested message structure is for backward
// compatibility with Google API client libraries. It also makes the error
// more readable to developers.
Status error = 1;
}

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vendor/github.com/googleapis/gax-go/v2/call_option.go generated vendored Normal file
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// Copyright 2016, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
package gax
import (
"math/rand"
"time"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
// CallOption is an option used by Invoke to control behaviors of RPC calls.
// CallOption works by modifying relevant fields of CallSettings.
type CallOption interface {
// Resolve applies the option by modifying cs.
Resolve(cs *CallSettings)
}
// Retryer is used by Invoke to determine retry behavior.
type Retryer interface {
// Retry reports whether a request should be retried and how long to pause before retrying
// if the previous attempt returned with err. Invoke never calls Retry with nil error.
Retry(err error) (pause time.Duration, shouldRetry bool)
}
type retryerOption func() Retryer
func (o retryerOption) Resolve(s *CallSettings) {
s.Retry = o
}
// WithRetry sets CallSettings.Retry to fn.
func WithRetry(fn func() Retryer) CallOption {
return retryerOption(fn)
}
// OnErrorFunc returns a Retryer that retries if and only if the previous attempt
// returns an error that satisfies shouldRetry.
//
// Pause times between retries are specified by bo. bo is only used for its
// parameters; each Retryer has its own copy.
func OnErrorFunc(bo Backoff, shouldRetry func(err error) bool) Retryer {
return &errorRetryer{
shouldRetry: shouldRetry,
backoff: bo,
}
}
type errorRetryer struct {
backoff Backoff
shouldRetry func(err error) bool
}
func (r *errorRetryer) Retry(err error) (time.Duration, bool) {
if r.shouldRetry(err) {
return r.backoff.Pause(), true
}
return 0, false
}
// OnCodes returns a Retryer that retries if and only if
// the previous attempt returns a GRPC error whose error code is stored in cc.
// Pause times between retries are specified by bo.
//
// bo is only used for its parameters; each Retryer has its own copy.
func OnCodes(cc []codes.Code, bo Backoff) Retryer {
return &boRetryer{
backoff: bo,
codes: append([]codes.Code(nil), cc...),
}
}
type boRetryer struct {
backoff Backoff
codes []codes.Code
}
func (r *boRetryer) Retry(err error) (time.Duration, bool) {
st, ok := status.FromError(err)
if !ok {
return 0, false
}
c := st.Code()
for _, rc := range r.codes {
if c == rc {
return r.backoff.Pause(), true
}
}
return 0, false
}
// Backoff implements exponential backoff. The wait time between retries is a
// random value between 0 and the "retry period" - the time between retries. The
// retry period starts at Initial and increases by the factor of Multiplier
// every retry, but is capped at Max.
//
// Note: MaxNumRetries / RPCDeadline is specifically not provided. These should
// be built on top of Backoff.
type Backoff struct {
// Initial is the initial value of the retry period, defaults to 1 second.
Initial time.Duration
// Max is the maximum value of the retry period, defaults to 30 seconds.
Max time.Duration
// Multiplier is the factor by which the retry period increases.
// It should be greater than 1 and defaults to 2.
Multiplier float64
// cur is the current retry period.
cur time.Duration
}
// Pause returns the next time.Duration that the caller should use to backoff.
func (bo *Backoff) Pause() time.Duration {
if bo.Initial == 0 {
bo.Initial = time.Second
}
if bo.cur == 0 {
bo.cur = bo.Initial
}
if bo.Max == 0 {
bo.Max = 30 * time.Second
}
if bo.Multiplier < 1 {
bo.Multiplier = 2
}
// Select a duration between 1ns and the current max. It might seem
// counterintuitive to have so much jitter, but
// https://www.awsarchitectureblog.com/2015/03/backoff.html argues that
// that is the best strategy.
d := time.Duration(1 + rand.Int63n(int64(bo.cur)))
bo.cur = time.Duration(float64(bo.cur) * bo.Multiplier)
if bo.cur > bo.Max {
bo.cur = bo.Max
}
return d
}
type grpcOpt []grpc.CallOption
func (o grpcOpt) Resolve(s *CallSettings) {
s.GRPC = o
}
// WithGRPCOptions allows passing gRPC call options during client creation.
func WithGRPCOptions(opt ...grpc.CallOption) CallOption {
return grpcOpt(append([]grpc.CallOption(nil), opt...))
}
// CallSettings allow fine-grained control over how calls are made.
type CallSettings struct {
// Retry returns a Retryer to be used to control retry logic of a method call.
// If Retry is nil or the returned Retryer is nil, the call will not be retried.
Retry func() Retryer
// CallOptions to be forwarded to GRPC.
GRPC []grpc.CallOption
}

39
vendor/github.com/googleapis/gax-go/v2/gax.go generated vendored Normal file
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// Copyright 2016, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Package gax contains a set of modules which aid the development of APIs
// for clients and servers based on gRPC and Google API conventions.
//
// Application code will rarely need to use this library directly.
// However, code generated automatically from API definition files can use it
// to simplify code generation and to provide more convenient and idiomatic API surfaces.
package gax
// Version specifies the gax-go version being used.
const Version = "2.1.1"

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// Copyright 2018, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
package gax
import "bytes"
// XGoogHeader is for use by the Google Cloud Libraries only.
//
// XGoogHeader formats key-value pairs.
// The resulting string is suitable for x-goog-api-client header.
func XGoogHeader(keyval ...string) string {
if len(keyval) == 0 {
return ""
}
if len(keyval)%2 != 0 {
panic("gax.Header: odd argument count")
}
var buf bytes.Buffer
for i := 0; i < len(keyval); i += 2 {
buf.WriteByte(' ')
buf.WriteString(keyval[i])
buf.WriteByte('/')
buf.WriteString(keyval[i+1])
}
return buf.String()[1:]
}

104
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// Copyright 2016, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
package gax
import (
"context"
"strings"
"time"
"github.com/googleapis/gax-go/v2/apierror"
)
// APICall is a user defined call stub.
type APICall func(context.Context, CallSettings) error
// Invoke calls the given APICall, performing retries as specified by opts, if
// any.
func Invoke(ctx context.Context, call APICall, opts ...CallOption) error {
var settings CallSettings
for _, opt := range opts {
opt.Resolve(&settings)
}
return invoke(ctx, call, settings, Sleep)
}
// Sleep is similar to time.Sleep, but it can be interrupted by ctx.Done() closing.
// If interrupted, Sleep returns ctx.Err().
func Sleep(ctx context.Context, d time.Duration) error {
t := time.NewTimer(d)
select {
case <-ctx.Done():
t.Stop()
return ctx.Err()
case <-t.C:
return nil
}
}
type sleeper func(ctx context.Context, d time.Duration) error
// invoke implements Invoke, taking an additional sleeper argument for testing.
func invoke(ctx context.Context, call APICall, settings CallSettings, sp sleeper) error {
var retryer Retryer
for {
err := call(ctx, settings)
if err == nil {
return nil
}
// Never retry permanent certificate errors. (e.x. if ca-certificates
// are not installed). We should only make very few, targeted
// exceptions: many (other) status=Unavailable should be retried, such
// as if there's a network hiccup, or the internet goes out for a
// minute. This is also why here we are doing string parsing instead of
// simply making Unavailable a non-retried code elsewhere.
if strings.Contains(err.Error(), "x509: certificate signed by unknown authority") {
return err
}
if apierr, ok := apierror.FromError(err); ok {
err = apierr
}
if settings.Retry == nil {
return err
}
if retryer == nil {
if r := settings.Retry(); r != nil {
retryer = r
} else {
return err
}
}
if d, ok := retryer.Retry(err); !ok {
return err
} else if err = sp(ctx, d); err != nil {
return err
}
}
}