/
message_event_handler.go
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/
message_event_handler.go
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// Copyright 2018 StreamSets 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 controlhub
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"github.com/satori/go.uuid"
"github.com/shirou/gopsutil/process"
log "github.com/sirupsen/logrus"
"github.com/streamsets/datacollector-edge/container/common"
"github.com/streamsets/datacollector-edge/container/execution/manager"
"github.com/streamsets/datacollector-edge/container/store"
"github.com/streamsets/datacollector-edge/container/util"
"io"
"net/http"
"net/url"
"os"
"runtime"
"time"
)
const (
MessagingUrlPath = "/messaging/rest/v1/events"
)
type MessageEventHandler struct {
schConfig Config
buildInfo *common.BuildInfo
runtimeInfo *common.RuntimeInfo
manager manager.Manager
pipelineStoreTask store.PipelineStoreTask
quitSendingEventToDPM chan bool
ackEventList []*ClientEvent
sendingPipelineStatusElapsedTime time.Time
httpClient *http.Client
}
func (m *MessageEventHandler) Init() {
if m.schConfig.Enabled && m.schConfig.AppAuthToken != "" {
ticker := time.NewTicker(time.Duration(m.schConfig.PingFrequency) * time.Millisecond)
m.quitSendingEventToDPM = make(chan bool)
go func() {
err := m.SendEvent(true)
if err != nil {
log.WithError(err).Error()
}
for {
select {
case <-ticker.C:
err := m.SendEvent(false)
if err != nil {
log.WithError(err).Error()
}
case <-m.quitSendingEventToDPM:
ticker.Stop()
return
}
}
}()
}
}
func (m *MessageEventHandler) SendEvent(sendInfoEvent bool) error {
clientEventList := make([]*ClientEvent, 0)
for _, ackEvent := range m.ackEventList {
clientEventList = append(clientEventList, ackEvent)
}
if sendInfoEvent {
clientEventList = append(clientEventList, m.createSdcEdgeInfoEvent())
}
if m.sendingPipelineStatusElapsedTime.IsZero() ||
time.Since(m.sendingPipelineStatusElapsedTime).Seconds()*1e3 > float64(m.schConfig.StatusEventsInterval) {
log.Debug("Send Pipeline Status Event")
pipelineInfoList, err := m.pipelineStoreTask.GetPipelines()
if err != nil {
log.Println(err)
return err
}
pipelineStatusEventList := make([]*PipelineStatusEvent, 0)
for _, pipelineInfo := range pipelineInfoList {
var offsetString string
runner := m.manager.GetRunner(pipelineInfo.PipelineId)
if runner != nil {
sourceOffset, err := runner.GetOffset()
if err != nil {
log.WithError(err).Error()
return err
}
offsetJson, err := json.Marshal(sourceOffset)
if err != nil {
log.WithError(err).Error()
return err
}
offsetString = string(offsetJson)
pipelineState, err := runner.GetStatus()
if err != nil {
log.Println(err)
return err
}
if pipelineState.Status != common.EDITED {
pipelineStatusEventList = append(
pipelineStatusEventList,
m.createPipelineStatusEvent(pipelineState, offsetString, runner.IsRemotePipeline()),
)
}
}
}
pipelineStatusEvents := &PipelineStatusEvents{
PipelineStatusEventList: pipelineStatusEventList,
}
pipelineStatusEventListJson, _ := json.Marshal(pipelineStatusEvents)
pipelineStatusEvent := &ClientEvent{
EventId: uuid.NewV4().String(),
Destinations: []string{m.schConfig.EventsRecipient},
RequiresAck: false,
IsAckEvent: false,
EventTypeId: STATUS_MULTIPLE_PIPELINES,
Payload: string(pipelineStatusEventListJson),
}
clientEventList = append(clientEventList, pipelineStatusEvent)
// add Edge metrics event
metricsEvent := &SDCProcessMetricsEvent{
Timestamp: util.ConvertTimeToLong(time.Now()),
SdcId: m.runtimeInfo.ID,
}
currentProcess := process.Process{
Pid: int32(os.Getpid()),
}
cpuPercent, err := currentProcess.CPUPercent()
if err != nil {
log.WithError(err).Error("Error during fetching CPU Percentage")
} else {
metricsEvent.CpuLoad = cpuPercent
}
var memStats runtime.MemStats
runtime.ReadMemStats(&memStats)
metricsEvent.UsedMemory = memStats.HeapAlloc
metricsEventJson, _ := json.Marshal(metricsEvent)
metricsClientEvent := &ClientEvent{
EventId: uuid.NewV4().String(),
Destinations: m.schConfig.ProcessEventsRecipient,
RequiresAck: false,
IsAckEvent: false,
EventTypeId: SDC_PROCESS_METRICS_EVENT,
Payload: string(metricsEventJson),
}
clientEventList = append(clientEventList, metricsClientEvent)
m.sendingPipelineStatusElapsedTime = time.Now()
}
jsonValue, err := json.Marshal(clientEventList)
if err != nil {
log.WithError(err).Error()
return err
}
baseUrl, err := url.Parse(m.schConfig.BaseUrl)
if err != nil {
log.WithError(err).Error()
return err
}
messagingUrl, err := url.Parse(MessagingUrlPath)
if err != nil {
log.WithError(err).Error()
return err
}
var eventsUrl = baseUrl.ResolveReference(messagingUrl)
req, err := http.NewRequest("POST", eventsUrl.String(), bytes.NewBuffer(jsonValue))
req.Header.Set(common.HeaderXAppAuthToken, m.schConfig.AppAuthToken)
req.Header.Set(common.HeaderXAppComponentId, m.runtimeInfo.ID)
req.Header.Set(common.HeaderXRestCall, "true")
req.Header.Set(common.HeaderContentType, common.ApplicationJson)
resp, err := m.httpClient.Do(req)
if err != nil {
return err
}
defer func() {
if err := resp.Body.Close(); err != nil {
log.WithError(err).Error("Error while closing the response body")
}
}()
log.WithField("status", resp.Status).Debug("Control Hub Event Status")
if resp.StatusCode != 200 {
return errors.New("Control Hub Send event failed")
}
decoder := json.NewDecoder(resp.Body)
var serverEventList []ServerEvent
err = decoder.Decode(&serverEventList)
if err != nil {
switch {
case err == io.EOF:
// empty body
case err != nil:
// other error
return errors.New(fmt.Sprintf("Parsing Control Hub event failed: %s", err))
}
}
ackClientEventList := make([]*ClientEvent, 0)
for _, serverEvent := range serverEventList {
ackEvent := m.handleDPMEvent(serverEvent)
if ackEvent != nil {
ackClientEventList = append(ackClientEventList, ackEvent)
}
}
m.ackEventList = ackClientEventList
return nil
}
func (m *MessageEventHandler) createSdcEdgeInfoEvent() *ClientEvent {
jobLabels := make([]string, 0)
for _, jobLabel := range m.schConfig.JobLabels {
if len(jobLabel) > 0 {
jobLabels = append(jobLabels, jobLabel)
}
}
sdcInfoEvent := SDCInfoEvent{
EdgeId: m.runtimeInfo.ID,
HttpUrl: m.runtimeInfo.HttpUrl,
GoVersion: runtime.Version(),
EdgeBuildInfo: m.buildInfo,
Labels: jobLabels,
Edge: true,
}
sdcInfoEventJson, _ := json.Marshal(sdcInfoEvent)
sdcEdgeInfoEvent := &ClientEvent{
EventId: m.runtimeInfo.HttpUrl,
Destinations: []string{m.schConfig.EventsRecipient},
RequiresAck: false,
IsAckEvent: false,
EventTypeId: SDC_INFO_EVENT,
Payload: string(sdcInfoEventJson),
}
return sdcEdgeInfoEvent
}
func (m *MessageEventHandler) createPipelineStatusEvent(
pipelineState *common.PipelineState,
offsetString string,
isRemote bool,
) *PipelineStatusEvent {
pipelineStatusEvent := &PipelineStatusEvent{
Name: pipelineState.PipelineId,
Title: pipelineState.PipelineId,
TimeStamp: pipelineState.TimeStamp,
IsRemote: isRemote,
PipelineStatus: pipelineState.Status,
Message: pipelineState.Message,
Offset: offsetString,
}
return pipelineStatusEvent
}
func (m *MessageEventHandler) handleDPMEvent(serverEvent ServerEvent) *ClientEvent {
log.Debugf("Handling Control Hub Events: %d", serverEvent.EventTypeId)
var ackEventMessage string
ackEventStatus := ACK_EVENT_SUCCESS
switch serverEvent.EventTypeId {
case SAVE_PIPELINE:
var pipelineSaveEvent PipelineSaveEvent
if err := json.Unmarshal([]byte(serverEvent.Payload), &pipelineSaveEvent); err != nil {
ackEventMessage = err.Error()
ackEventStatus = ACK_EVENT_ERROR
log.WithError(err).Error("Error during handling Control Hub SAVE Pipeline Event")
break
}
var pipelineConfiguration common.PipelineConfiguration
if err := json.Unmarshal([]byte(pipelineSaveEvent.PipelineConfigurationAndRules.PipelineConfig),
&pipelineConfiguration); err != nil {
ackEventMessage = err.Error()
ackEventStatus = ACK_EVENT_ERROR
log.WithError(err).Error("Error during handling Control Hub SAVE Pipeline Event")
break
}
newPipeline, err := m.pipelineStoreTask.Create(
pipelineSaveEvent.Name,
pipelineConfiguration.Title,
pipelineConfiguration.Description,
true,
)
if err != nil {
ackEventMessage = err.Error()
ackEventStatus = ACK_EVENT_ERROR
log.WithError(err).Error("Error during handling Control Hub SAVE Pipeline Event")
break
}
pipelineConfiguration.UUID = newPipeline.UUID
pipelineConfiguration.PipelineId = newPipeline.PipelineId
_, err = m.pipelineStoreTask.Save(pipelineSaveEvent.Name, pipelineConfiguration)
if err != nil {
ackEventMessage = err.Error()
ackEventStatus = ACK_EVENT_ERROR
log.WithError(err).Error("Error during handling Control Hub SAVE Pipeline Event")
break
}
// Update offset
runner := m.manager.GetRunner(pipelineSaveEvent.Name)
if runner != nil && len(pipelineSaveEvent.Offset) > 0 {
log.Debug("Updating offset:", pipelineSaveEvent.Offset)
var sourceOffset common.SourceOffset
err := json.Unmarshal([]byte(pipelineSaveEvent.Offset), &sourceOffset)
if err != nil {
log.WithError(err).Error("Error de-serializing offset")
} else {
err = runner.CommitOffset(sourceOffset)
if err != nil {
log.WithError(err).Error("Error updating offset")
}
}
}
case START_PIPELINE:
var pipelineBaseEvent PipelineBaseEvent
if err := json.Unmarshal([]byte(serverEvent.Payload), &pipelineBaseEvent); err != nil {
ackEventMessage = err.Error()
ackEventStatus = ACK_EVENT_ERROR
log.WithError(err).Error("Error handling Control Hub Start Pipeline Event")
break
}
_, err := m.manager.StartPipeline(pipelineBaseEvent.Name, nil)
if err != nil {
ackEventMessage = err.Error()
ackEventStatus = ACK_EVENT_ERROR
log.WithError(err).Error("Error handling Control Hub Start Pipeline Event")
break
}
case STOP_PIPELINE:
var pipelineBaseEvent PipelineBaseEvent
if err := json.Unmarshal([]byte(serverEvent.Payload), &pipelineBaseEvent); err != nil {
ackEventMessage = err.Error()
ackEventStatus = ACK_EVENT_ERROR
log.WithError(err).Error("Error handling Control Hub Stop Pipeline Event")
break
}
_, err := m.manager.StopPipeline(pipelineBaseEvent.Name)
if err != nil {
ackEventMessage = err.Error()
ackEventStatus = ACK_EVENT_ERROR
log.WithError(err).Error("Error handling Control Hub Stop Pipeline Event")
break
}
case VALIDATE_PIPELINE:
case RESET_OFFSET_PIPELINE:
case DELETE_HISTORY_PIPELINE:
case DELETE_PIPELINE:
var pipelineBaseEvent PipelineBaseEvent
if err := json.Unmarshal([]byte(serverEvent.Payload), &pipelineBaseEvent); err != nil {
ackEventMessage = err.Error()
ackEventStatus = ACK_EVENT_ERROR
log.WithError(err).Error("Error handling Control Hub Delete Pipeline Event")
break
}
err := m.pipelineStoreTask.Delete(pipelineBaseEvent.Name)
if err != nil {
ackEventMessage = err.Error()
ackEventStatus = ACK_EVENT_ERROR
log.WithError(err).Error("Error handling Control Hub Delete Pipeline Event")
break
}
case STOP_DELETE_PIPELINE:
var pipelineBaseEvent PipelineBaseEvent
if err := json.Unmarshal([]byte(serverEvent.Payload), &pipelineBaseEvent); err != nil {
ackEventMessage = err.Error()
ackEventStatus = ACK_EVENT_ERROR
log.WithError(err).Error("Error handling Control Hub Start Pipeline Event")
break
}
_, err := m.manager.StopPipeline(pipelineBaseEvent.Name)
if err != nil {
ackEventMessage = err.Error()
ackEventStatus = ACK_EVENT_ERROR
log.WithError(err).Error("Error handling Control Hub Stop Delete Pipeline Event")
break
}
err = m.pipelineStoreTask.Delete(pipelineBaseEvent.Name)
if err != nil {
ackEventMessage = err.Error()
ackEventStatus = ACK_EVENT_ERROR
log.WithError(err).Error("Error handling Control Hub Stop Delete Pipeline Event")
break
}
default:
ackEventMessage = fmt.Sprintf("Unrecognized event: %d", serverEvent.EventTypeId)
}
var ackClientEvent *ClientEvent
if serverEvent.RequiresAck {
ackEvent := &AckEvent{
AckEventStatus: ackEventStatus,
Message: ackEventMessage,
}
ackEventJson, _ := json.Marshal(ackEvent)
ackClientEvent = &ClientEvent{
EventId: serverEvent.EventId,
Destinations: []string{m.schConfig.EventsRecipient},
RequiresAck: false,
IsAckEvent: true,
EventTypeId: ACK_EVENT,
Payload: string(ackEventJson),
}
}
return ackClientEvent
}
func (m *MessageEventHandler) Shutdown() {
m.quitSendingEventToDPM <- true
}
func NewMessageEventHandler(
schConfig Config,
buildInfo *common.BuildInfo,
runtimeInfo *common.RuntimeInfo,
pipelineStoreTask store.PipelineStoreTask,
manager manager.Manager,
) *MessageEventHandler {
messagingEventHandler := &MessageEventHandler{
schConfig: schConfig,
buildInfo: buildInfo,
runtimeInfo: runtimeInfo,
manager: manager,
pipelineStoreTask: pipelineStoreTask,
httpClient: &http.Client{},
}
return messagingEventHandler
}