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usagepublisher.go
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usagepublisher.go
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package metric
import (
"bytes"
"encoding/json"
"fmt"
"io"
"mime/multipart"
"net/textproto"
"sort"
"strings"
"time"
"github.com/google/uuid"
"github.com/sirupsen/logrus"
"github.com/Axway/agent-sdk/pkg/agent"
"github.com/Axway/agent-sdk/pkg/api"
"github.com/Axway/agent-sdk/pkg/jobs"
"github.com/Axway/agent-sdk/pkg/util"
"github.com/Axway/agent-sdk/pkg/util/log"
)
type usagePublisher struct {
apiClient api.Client
storage storageCache
report *usageReportCache
jobID string
ready bool
offline bool
logger log.FieldLogger
usageLogger log.FieldLogger
}
func (c *usagePublisher) publishEvent(event interface{}) error {
if usageEvent, ok := event.(UsageEvent); ok {
return c.publishToCache(usageEvent)
}
c.logger.Error("event was not a usage event")
return nil
}
func (c *usagePublisher) publishToCache(event UsageEvent) error {
return c.report.addReport(event)
}
func (c *usagePublisher) publishToPlatformUsage(event UsageEvent) error {
token, err := agent.GetCentralAuthToken()
if err != nil {
return err
}
event, startTime := aggregateReports(event)
b, contentType, err := c.createMultipartFormData(event)
if err != nil {
return err
}
headers := map[string]string{
"Content-Type": contentType,
"Authorization": "Bearer " + token,
}
request := api.Request{
Method: api.POST,
URL: agent.GetCentralConfig().GetUsageReportingConfig().GetURL() + "/api/v1/usage",
Headers: headers,
Body: b.Bytes(),
}
c.logger.Debugf("Payload for Usage event : %s\n", b.String())
response, err := c.apiClient.Send(request)
if err != nil {
c.logger.WithError(err).Error("publishing usage")
return err
}
fields := logrus.Fields{
"date": startTime,
}
for usageKey, usageVal := range event.Report[startTime].Usage {
fields[usageKey] = usageVal
}
if response.Code == 202 {
c.logger.WithField("statusCode", 202).Debugf("successful request with payload: %s", b.String())
c.usageLogger.WithFields(fields).Info("successfully published")
return nil
} else if response.Code >= 500 {
err := fmt.Errorf("server error")
c.logger.WithField("statusCode", response.Code).WithError(err).Error(string(response.Body))
return err
}
usageResp := UsageResponse{}
err = json.Unmarshal(response.Body, &usageResp)
if err != nil {
c.logger.WithField("responseBody", string(response.Body)).WithField("statusCode", response.Code).
WithError(err).Error("Could not unmarshal response body")
return err
}
if strings.HasPrefix(usageResp.Description, "The file exceeds the maximum upload size of ") || usageResp.Description == "Environment ID not found" {
err := fmt.Errorf("request failed with unexpected status code. Not scheduling for retry in the next batch")
c.logger.WithField("statusCode", response.Code).WithError(err).Error(usageResp.Description)
return nil
}
err = fmt.Errorf("request failed with unexpected status code")
c.logger.WithField("statusCode", response.Code).WithError(err).Error(usageResp.Description)
return err
}
func (c *usagePublisher) createMultipartFormData(event UsageEvent) (b bytes.Buffer, contentType string, err error) {
buffer, _ := json.Marshal(event)
w := multipart.NewWriter(&b)
defer w.Close()
w.WriteField("organizationId", event.OrgGUID)
var fw io.Writer
if fw, err = c.createFilePart(w, uuid.New().String()+".json"); err != nil {
return
}
if _, err = io.Copy(fw, bytes.NewReader(buffer)); err != nil {
return
}
contentType = w.FormDataContentType()
return
}
func aggregateReports(event UsageEvent) (UsageEvent, string) {
// order all the keys, this will be used to find first and last timestamp
orderedKeys := make([]string, 0, len(event.Report))
for k := range event.Report {
orderedKeys = append(orderedKeys, k)
}
sort.Strings(orderedKeys)
// create a single report which has all eventReports appended
finalReport := map[string]UsageReport{
orderedKeys[0]: {
Product: event.Report[orderedKeys[0]].Product,
Usage: make(map[string]int64),
Meta: event.Report[orderedKeys[0]].Meta,
},
}
for _, report := range event.Report {
for usageKey, usageVal := range report.Usage {
finalReport[orderedKeys[0]].Usage[usageKey] += usageVal
}
}
event.Report = finalReport
startTime, _ := time.Parse(ISO8601, orderedKeys[0])
endTime := now()
event.Granularity = int(endTime.Sub(startTime).Milliseconds())
event.Timestamp = ISO8601Time(endTime)
return event, orderedKeys[0]
}
// createFilePart - adds the file part to the request
func (c *usagePublisher) createFilePart(w *multipart.Writer, filename string) (io.Writer, error) {
h := make(textproto.MIMEHeader)
h.Set("Content-Disposition", fmt.Sprintf(`form-data; name="file"; filename="%s"`, filename))
h.Set("Content-Type", "application/json")
return w.CreatePart(h)
}
// newUsagePublisher - Creates publisher job
func newUsagePublisher(storage storageCache, report *usageReportCache) *usagePublisher {
centralCfg := agent.GetCentralConfig()
publisher := &usagePublisher{
apiClient: api.NewClient(centralCfg.GetTLSConfig(), centralCfg.GetProxyURL(),
api.WithTimeout(centralCfg.GetClientTimeout()),
api.WithSingleURL()),
storage: storage,
report: report,
offline: agent.GetCentralConfig().GetUsageReportingConfig().IsOfflineMode(),
logger: log.NewFieldLogger().WithComponent("usagePublisher").WithPackage("metric"),
usageLogger: log.NewUsageFieldLogger(),
}
publisher.usageLogger.Info("usage logger started")
publisher.registerReportJob()
return publisher
}
func (c *usagePublisher) isReady() bool {
return c.ready
}
func (c *usagePublisher) registerReportJob() {
if !util.IsNotTest() {
return // skip setting up the job in test
}
schedule := agent.GetCentralConfig().GetUsageReportingConfig().GetUsageSchedule()
if agent.GetCentralConfig().GetUsageReportingConfig().IsOfflineMode() {
schedule = agent.GetCentralConfig().GetUsageReportingConfig().GetReportSchedule()
}
// start the job according to the cron schedule
var err error
c.jobID, err = jobs.RegisterScheduledJobWithName(c, schedule, "Usage Reporting")
if err != nil {
c.logger.WithError(err).Error("could not register usage report creation job")
}
}
// Status - returns an error if the status of the offline report job is in error
func (c *usagePublisher) Status() error {
return nil
}
// Ready - indicates that the offline report job is ready to process
//
// additionally runs the initial report gen if the last trigger would
// have ran but the agent was down
func (c *usagePublisher) Ready() bool {
if agent.GetCentralConfig().GetEnvironmentID() == "" {
return false
}
defer func() {
c.ready = true
}() // once any existing reports are saved off this isReady
err := c.Execute()
if err != nil {
c.logger.WithError(err).Errorf("error hit generating report, report still in cache")
}
return true
}
// Execute - process the offline report generation
func (c *usagePublisher) Execute() error {
if c.offline {
return c.report.saveReport()
}
return c.report.sendReport(c.publishToPlatformUsage)
}