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adapter.go
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adapter.go
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/*
Copyright 2022 TriggerMesh Inc.
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.
*/
package salesforcetarget
import (
"context"
"fmt"
"io"
"net/http"
"time"
cloudevents "github.com/cloudevents/sdk-go/v2"
"go.uber.org/zap"
pkgadapter "knative.dev/eventing/pkg/adapter/v2"
"knative.dev/pkg/logging"
"github.com/triggermesh/triggermesh/pkg/apis/targets"
"github.com/triggermesh/triggermesh/pkg/apis/targets/v1alpha1"
"github.com/triggermesh/triggermesh/pkg/metrics"
targetce "github.com/triggermesh/triggermesh/pkg/targets/adapter/cloudevents"
"github.com/triggermesh/triggermesh/pkg/targets/adapter/salesforcetarget/auth"
"github.com/triggermesh/triggermesh/pkg/targets/adapter/salesforcetarget/client"
)
const (
salesforceTimeout = 5 * time.Second
)
// NewTarget creates a new Salesforce Target adapter
func NewTarget(ctx context.Context, envAcc pkgadapter.EnvConfigAccessor, ceClient cloudevents.Client) pkgadapter.Adapter {
logger := logging.FromContext(ctx)
mt := &pkgadapter.MetricTag{
ResourceGroup: targets.SalesforceTargetResource.String(),
Namespace: envAcc.GetNamespace(),
Name: envAcc.GetName(),
}
metrics.MustRegisterEventProcessingStatsView()
env := envAcc.(*envAccessor)
jwtAuth, err := auth.NewJWTAuthenticator(env.CertKey, env.ClientID, env.User, env.AuthServer, http.DefaultClient, logger.Named("authenticator"))
if err != nil {
logger.Panicf("Error creating JWT authenticator: %v", err)
}
sfc := client.New(jwtAuth, logger.Named("sfclient"),
client.WithAPIVersion(env.Version),
client.WithHTTPClient(&http.Client{Timeout: salesforceTimeout}))
replier, err := targetce.New(env.Component, logger.Named("replier"),
targetce.ReplierWithStatefulHeaders(env.BridgeIdentifier),
targetce.ReplierWithStaticResponseType(v1alpha1.EventTypeSalesforceAPICallResponse))
if err != nil {
logger.Panicf("Error creating CloudEvents replier: %v", err)
}
return &salesforceTarget{
sfClient: sfc,
replier: replier,
ceClient: ceClient,
logger: logger,
sr: metrics.MustNewEventProcessingStatsReporter(mt),
}
}
var _ pkgadapter.Adapter = (*salesforceTarget)(nil)
type salesforceTarget struct {
sfClient *client.SalesforceClient
replier *targetce.Replier
ceClient cloudevents.Client
logger *zap.SugaredLogger
sr *metrics.EventProcessingStatsReporter
}
func (a *salesforceTarget) Start(ctx context.Context) error {
a.logger.Info("Starting Salesforce adapter")
// This call will perform and cache credentials for
// future usages when dispatching events.
err := a.sfClient.Authenticate(ctx)
if err != nil {
return err
}
return a.ceClient.StartReceiver(ctx, a.dispatch)
}
func (a *salesforceTarget) dispatch(ctx context.Context, event cloudevents.Event) (*cloudevents.Event, cloudevents.Result) {
if event.Type() != v1alpha1.EventTypeSalesforceAPICall {
return a.replier.Error(&event, targetce.ErrorCodeEventContext, fmt.Errorf("event type %q is not supported", event.Type()), nil)
}
sfr := &client.SalesforceAPIRequest{}
if err := event.DataAs(sfr); err != nil {
return a.replier.Error(&event, targetce.ErrorCodeRequestParsing, err, nil)
}
if err := sfr.Validate(); err != nil {
return a.replier.Error(&event, targetce.ErrorCodeRequestValidation, err, nil)
}
res, err := a.sfClient.Do(ctx, *sfr)
if err != nil {
return a.replier.Error(&event, targetce.ErrorCodeAdapterProcess, err, nil)
}
defer res.Body.Close()
resBody, err := io.ReadAll(res.Body)
if err != nil {
return a.replier.Error(&event, targetce.ErrorCodeParseResponse, err, nil)
}
if res.StatusCode >= 400 {
return a.replier.Error(&event, targetce.ErrorCodeAdapterProcess,
fmt.Errorf("received HTTP code %d", res.StatusCode),
map[string]string{"body": string(resBody)})
}
return a.replier.Ok(&event, resBody)
}