forked from uber/zanzibar
/
baz_simpleservice_method_call.go
163 lines (136 loc) · 4.85 KB
/
baz_simpleservice_method_call.go
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// Code generated by zanzibar
// @generated
// Copyright (c) 2018 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package workflow
import (
"context"
"net/textproto"
"github.com/uber/zanzibar/config"
zanzibar "github.com/uber/zanzibar/runtime"
clientsBazBaz "github.com/uber/zanzibar/examples/example-gateway/build/gen-code/clients/baz/baz"
endpointsBazBaz "github.com/uber/zanzibar/examples/example-gateway/build/gen-code/endpoints/baz/baz"
module "github.com/uber/zanzibar/examples/example-gateway/build/endpoints/baz/module"
"go.uber.org/zap"
)
// SimpleServiceCallWorkflow defines the interface for SimpleServiceCall workflow
type SimpleServiceCallWorkflow interface {
Handle(
ctx context.Context,
reqHeaders zanzibar.Header,
r *endpointsBazBaz.SimpleService_Call_Args,
) (zanzibar.Header, error)
}
// NewSimpleServiceCallWorkflow creates a workflow
func NewSimpleServiceCallWorkflow(deps *module.Dependencies) SimpleServiceCallWorkflow {
var whitelistedDynamicHeaders []string
if deps.Default.Config.ContainsKey("clients.baz.alternates") {
var alternateServiceDetail config.AlternateServiceDetail
deps.Default.Config.MustGetStruct("clients.baz.alternates", &alternateServiceDetail)
for _, routingConfig := range alternateServiceDetail.RoutingConfigs {
whitelistedDynamicHeaders = append(whitelistedDynamicHeaders, textproto.CanonicalMIMEHeaderKey(routingConfig.HeaderName))
}
}
return &simpleServiceCallWorkflow{
Clients: deps.Client,
Logger: deps.Default.Logger,
whitelistedDynamicHeaders: whitelistedDynamicHeaders,
}
}
// simpleServiceCallWorkflow calls thrift client Baz.Call
type simpleServiceCallWorkflow struct {
Clients *module.ClientDependencies
Logger *zap.Logger
whitelistedDynamicHeaders []string
}
// Handle calls thrift client.
func (w simpleServiceCallWorkflow) Handle(
ctx context.Context,
reqHeaders zanzibar.Header,
r *endpointsBazBaz.SimpleService_Call_Args,
) (zanzibar.Header, error) {
clientRequest := convertToCallClientRequest(r)
clientHeaders := map[string]string{}
var ok bool
var h string
h, ok = reqHeaders.Get("X-Deputy-Forwarded")
if ok {
clientHeaders["X-Deputy-Forwarded"] = h
}
h, ok = reqHeaders.Get("X-Token")
if ok {
clientHeaders["X-Token"] = h
}
h, ok = reqHeaders.Get("X-Uuid")
if ok {
clientHeaders["X-Uuid"] = h
}
for _, whitelistedHeader := range w.whitelistedDynamicHeaders {
headerVal, ok := reqHeaders.Get(whitelistedHeader)
if ok {
clientHeaders[whitelistedHeader] = headerVal
}
}
cliRespHeaders, err := w.Clients.Baz.Call(
ctx, clientHeaders, clientRequest,
)
if err != nil {
switch errValue := err.(type) {
case *clientsBazBaz.AuthErr:
serverErr := convertCallAuthErr(
errValue,
)
return nil, serverErr
default:
w.Logger.Warn("Client failure: could not make client request",
zap.Error(errValue),
zap.String("client", "Baz"),
)
return nil, err
}
}
// Filter and map response headers from client to server response.
resHeaders := zanzibar.ServerHTTPHeader{}
if cliRespHeaders != nil {
resHeaders.Set("Some-Res-Header", cliRespHeaders["Some-Res-Header"])
}
return resHeaders, nil
}
func convertToCallClientRequest(in *endpointsBazBaz.SimpleService_Call_Args) *clientsBazBaz.SimpleService_Call_Args {
out := &clientsBazBaz.SimpleService_Call_Args{}
if in.Arg != nil {
out.Arg = &clientsBazBaz.BazRequest{}
out.Arg.B1 = bool(in.Arg.B1)
out.Arg.S2 = string(in.Arg.S2)
out.Arg.I3 = int32(in.Arg.I3)
} else {
out.Arg = nil
}
out.I64Optional = (*int64)(in.I64Optional)
out.TestUUID = (*clientsBazBaz.UUID)(in.TestUUID)
return out
}
func convertCallAuthErr(
clientError *clientsBazBaz.AuthErr,
) *endpointsBazBaz.AuthErr {
// TODO: Add error fields mapping here.
serverError := &endpointsBazBaz.AuthErr{}
return serverError
}