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messenger.go
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/
messenger.go
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package main
import (
"context"
"log"
"github.com/strider2038/go-examples/grpc/messaging"
"github.com/xeipuuv/gojsonschema"
)
type Messenger struct {
messaging.UnimplementedMessengerServer
}
var loader = gojsonschema.NewStringLoader(`{
"type": "object",
"required": ["name"],
"properties": {
"name": {
"type": "string",
"minLength": 5
}
}
}`)
func NewMessenger() *Messenger {
return &Messenger{}
}
func (m *Messenger) Dispatch(ctx context.Context, envelope *messaging.Envelope) (*messaging.DispatchResult, error) {
log.Printf("id: %s, body: %s, properties: %s", envelope.Headers.Id.String(), envelope.Body, envelope.Properties)
log.Println()
res, err := gojsonschema.Validate(loader, gojsonschema.NewGoLoader(envelope.Body.AsInterface()))
if err != nil {
return nil, err
}
if !res.Valid() {
errs := make([]string, 0)
for _, resultError := range res.Errors() {
errs = append(errs, resultError.String())
}
return &messaging.DispatchResult{
Status: messaging.DispatchResult_Fail,
Errors: errs,
}, nil
}
return &messaging.DispatchResult{
Status: messaging.DispatchResult_Success,
Id: envelope.Headers.Id,
}, nil
}