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commands.go
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commands.go
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//
// Copyright 2020 New Relic Corporation. All rights reserved.
// SPDX-License-Identifier: Apache-2.0
//
package newrelic
import (
"encoding/json"
"errors"
"fmt"
"strconv"
flatbuffers "github.com/google/flatbuffers/go"
"newrelic/collector"
"newrelic/limits"
"newrelic/log"
"newrelic/protocol"
)
type CommandsHandler struct {
Processor AgentDataHandler
}
func aggregateMetrics(txn protocol.Transaction, h *Harvest, txnName string) {
var m protocol.Metric
var data protocol.MetricData
var d [6]float64
n := txn.MetricsLength()
for i := 0; i < n; i++ {
txn.Metrics(&m, i)
m.Data(&data)
d[0] = data.Count()
d[1] = data.Total()
d[2] = data.Exclusive()
d[3] = data.Min()
d[4] = data.Max()
d[5] = data.SumSquares()
forced := Unforced
if data.Forced() != false {
forced = Forced
}
metricName := m.Name()
h.Metrics.AddRaw(metricName, "", "", d, forced)
if data.Scoped() != false {
h.Metrics.AddRaw(metricName, "", txnName, d, forced)
}
}
}
func copySlice(b []byte) []byte {
if nil == b {
return nil
}
cpy := make([]byte, len(b))
copy(cpy, b)
return cpy
}
type FlatTxn []byte
func (t FlatTxn) AggregateInto(h *Harvest) {
var tbl flatbuffers.Table
var txn protocol.Transaction
var syntheticsResourceID string
msg := protocol.GetRootAsMessage([]byte(t), 0)
msg.Data(&tbl)
txn.Init(tbl.Bytes, tbl.Pos)
h.Metrics.AddValue("Supportability/TxnData/Size", "", float64(len(t)), Forced)
h.Metrics.AddValue("Supportability/TxnData/CustomEvents", "", float64(txn.CustomEventsLength()), Forced)
h.Metrics.AddValue("Supportability/TxnData/Metrics", "", float64(txn.MetricsLength()), Forced)
h.Metrics.AddValue("Supportability/TxnData/SlowSQL", "", float64(txn.SlowSqlsLength()), Forced)
txnName := string(txn.Name())
requestURI := string(txn.Uri())
samplingPriority := SamplingPriority(txn.SamplingPriority())
if x := txn.SyntheticsResourceId(); len(x) > 0 {
syntheticsResourceID = string(x)
}
pid := int(txn.Pid())
if _, ok := h.pidSet[pid]; !ok {
h.pidSet[pid] = struct{}{}
}
if event := txn.TxnEvent(nil); event != nil {
cpy := copySlice(event.Data())
if syntheticsResourceID == "" {
h.TxnEvents.AddTxnEvent(cpy, samplingPriority)
} else {
h.TxnEvents.AddSyntheticsEvent(cpy, samplingPriority)
}
}
aggregateMetrics(txn, h, txnName)
if n := txn.ErrorsLength(); n > 0 {
var e protocol.Error
for i := 0; i < n; i++ {
txn.Errors(&e, i)
priority := int(e.Priority())
dataNeedsCopy := e.Data()
h.Errors.AddError(priority, dataNeedsCopy)
}
}
if n := txn.SlowSqlsLength(); n > 0 {
var slowSQL protocol.SlowSQL
for i := 0; i < n; i++ {
txn.SlowSqls(&slowSQL, i)
slow := &SlowSQL{}
slow.ID = SQLId(slowSQL.Id())
slow.Count = slowSQL.Count()
slow.TotalMicros = slowSQL.TotalMicros()
slow.MinMicros = slowSQL.MinMicros()
slow.MaxMicros = slowSQL.MaxMicros()
slow.MetricName = string(slowSQL.Metric())
slow.Query = string(slowSQL.Query())
slow.TxnName = txnName
slow.TxnURL = requestURI
slow.Params = copySlice(slowSQL.Params())
h.SlowSQLs.Observe(slow)
}
}
if n := txn.CustomEventsLength(); n > 0 {
var e protocol.Event
for i := 0; i < n; i++ {
txn.CustomEvents(&e, i)
data := copySlice(e.Data())
h.CustomEvents.AddEventFromData(data, samplingPriority)
}
}
if n := txn.SpanEventsLength(); n > 0 {
var e protocol.Event
for i := 0; i < n; i++ {
txn.SpanEvents(&e, i)
data := copySlice(e.Data())
h.SpanEvents.AddEventFromData(data, samplingPriority)
}
}
if n := txn.LogEventsLength(); n > 0 {
var e protocol.Event
for i := 0; i < n; i++ {
txn.LogEvents(&e, i)
data := copySlice(e.Data())
h.LogEvents.AddEventFromData(data, samplingPriority)
}
}
if n := txn.PhpPackages(nil); n != nil {
h.PhpPackages.AddPhpPackagesFromData(n.Data())
}
if trace := txn.Trace(nil); trace != nil {
data := trace.Data()
tt := &TxnTrace{
UnixTimestampMillis: trace.Timestamp(),
DurationMillis: trace.Duration(),
GUID: string(trace.Guid()),
SyntheticsResourceID: syntheticsResourceID,
ForcePersist: trace.ForcePersist() != false,
MetricName: txnName,
RequestURI: requestURI,
}
h.Metrics.AddValue("Supportability/TxnData/TraceSize", "",
float64(len(data)), Forced)
if h.TxnTraces.IsKeeper(tt) {
tt.Data = copySlice(data)
h.TxnTraces.AddTxnTrace(tt)
}
}
if n := txn.ErrorEventsLength(); n > 0 {
var e protocol.Event
for i := 0; i < n; i++ {
txn.ErrorEvents(&e, i)
data := copySlice(e.Data())
h.ErrorEvents.AddEventFromData(data, samplingPriority)
}
}
}
func MarshalAppInfoReply(reply AppInfoReply) []byte {
buf := flatbuffers.NewBuilder(0)
if reply.RunIDValid {
protocol.AppReplyStart(buf)
protocol.AppReplyAddStatus(buf, protocol.AppStatusStillValid)
dataOffset := protocol.AppReplyEnd(buf)
protocol.MessageStart(buf)
protocol.MessageAddDataType(buf, protocol.MessageBodyAppReply)
protocol.AppReplyAddConnectTimestamp(buf, reply.ConnectTimestamp)
protocol.AppReplyAddHarvestFrequency(buf, reply.HarvestFrequency)
protocol.AppReplyAddSamplingTarget(buf, reply.SamplingTarget)
protocol.MessageAddData(buf, dataOffset)
buf.Finish(protocol.MessageEnd(buf))
} else if reply.State == AppStateConnected {
replyPos := buf.CreateByteVector(reply.ConnectReply)
replyPoliciesPos := buf.CreateByteVector(reply.SecurityPolicies)
protocol.AppReplyStart(buf)
protocol.AppReplyAddStatus(buf, protocol.AppStatusConnected)
protocol.AppReplyAddConnectReply(buf, replyPos)
protocol.AppReplyAddSecurityPolicies(buf, replyPoliciesPos)
protocol.AppReplyAddConnectTimestamp(buf, reply.ConnectTimestamp)
protocol.AppReplyAddHarvestFrequency(buf, reply.HarvestFrequency)
protocol.AppReplyAddSamplingTarget(buf, reply.SamplingTarget)
dataOffset := protocol.AppReplyEnd(buf)
protocol.MessageStart(buf)
protocol.MessageAddDataType(buf, protocol.MessageBodyAppReply)
protocol.MessageAddData(buf, dataOffset)
buf.Finish(protocol.MessageEnd(buf))
} else {
protocol.AppReplyStart(buf)
switch reply.State {
case AppStateUnknown:
protocol.AppReplyAddStatus(buf, protocol.AppStatusUnknown)
case AppStateInvalidLicense:
protocol.AppReplyAddStatus(buf, protocol.AppStatusInvalidLicense)
case AppStateDisconnected:
protocol.AppReplyAddStatus(buf, protocol.AppStatusDisconnected)
}
dataOffset := protocol.AppReplyEnd(buf)
protocol.MessageStart(buf)
protocol.MessageAddDataType(buf, protocol.MessageBodyAppReply)
protocol.MessageAddData(buf, dataOffset)
buf.Finish(protocol.MessageEnd(buf))
}
return buf.Bytes[buf.Head():]
}
func UnmarshalAppInfo(tbl flatbuffers.Table) *AppInfo {
var app protocol.App
app.Init(tbl.Bytes, tbl.Pos)
policies := AgentPolicies{}
json.Unmarshal(copySlice(app.SupportedSecurityPolicies()), &policies.Policies)
info := &AppInfo{
License: collector.LicenseKey(app.License()),
Appname: string(app.AppName()),
AgentLanguage: string(app.AgentLanguage()),
AgentVersion: string(app.AgentVersion()),
RedirectCollector: string(app.RedirectCollector()),
Environment: JSONString(copySlice(app.Environment())),
Labels: JSONString(copySlice(app.Labels())),
Metadata: JSONString(copySlice(app.Metadata())),
Hostname: string(app.Host()),
HostDisplayName: string(app.DisplayHost()),
SecurityPolicyToken: string(app.SecurityPolicyToken()),
SupportedSecurityPolicies: policies,
TraceObserverHost: string(app.TraceObserverHost()),
TraceObserverPort: app.TraceObserverPort(),
SpanQueueSize: app.SpanQueueSize(),
HighSecurity: app.HighSecurity(),
DockerId: string(app.DockerId()),
}
info.initSettings(app.Settings())
// Of the four Event Limits (span, custom, analytic and error),
// only span, log, and custom events are configurable from the agent.
// If this changes in the future, the other values can be added here.
info.AgentEventLimits.SpanEventConfig.Limit = int(app.SpanEventsMaxSamplesStored())
info.AgentEventLimits.LogEventConfig.Limit = int(app.LogEventsMaxSamplesStored())
info.AgentEventLimits.CustomEventConfig.Limit = int(app.CustomEventsMaxSamplesStored())
return info
}
func processBinary(data []byte, handler AgentDataHandler) ([]byte, error) {
if len(data) == 0 {
log.Debugf("ignoring empty message")
return nil, nil
}
log.Debugf("received binary message, len=%d", len(data))
// Check that the first offset is actually within the bounds of the message
// length.
offset := int(flatbuffers.GetUOffsetT(data[0:]))
if len(data)-limits.MinFlatbufferSize <= offset {
return nil, errors.New("offset is too large, len=" + strconv.Itoa(offset))
}
msg := protocol.GetRootAsMessage(data, 0)
switch msg.DataType() {
case protocol.MessageBodyTransaction:
var tbl flatbuffers.Table
if !msg.Data(&tbl) {
return nil, errors.New("transaction missing message body")
}
if id := msg.AgentRunId(); len(id) > 0 {
// Send the data directly to the processor without a
// copy because each message is in its own buffer.
handler.IncomingTxnData(AgentRunID(id), FlatTxn(data))
return nil, nil
}
return nil, errors.New("missing agent run id for txn data command")
case protocol.MessageBodyApp:
var tbl flatbuffers.Table
if !msg.Data(&tbl) {
return nil, errors.New("app missing message body")
}
info := UnmarshalAppInfo(tbl)
var runID *AgentRunID
if id := msg.AgentRunId(); id != nil {
r := AgentRunID(id)
runID = &r
}
reply := handler.IncomingAppInfo(runID, info)
return MarshalAppInfoReply(reply), nil
case protocol.MessageBodySpanBatch:
var tbl flatbuffers.Table
if !msg.Data(&tbl) {
return nil, errors.New("span batch missing message body")
}
var batch protocol.SpanBatch
batch.Init(tbl.Bytes, tbl.Pos)
id := msg.AgentRunId()
if len(id) == 0 {
return nil, errors.New("missing agent run id for span batch command")
}
spanBatch := SpanBatch{id: AgentRunID(id), count: batch.Count(), batch: batch.EncodedBytes()}
handler.IncomingSpanBatch(spanBatch)
return nil, nil
case protocol.MessageBodyNONE:
log.Debugf("ignoring None message")
return nil, nil
case protocol.MessageBodyAppReply:
log.Debugf("message is AppReply")
return nil, nil
default:
return nil, errors.New("binary encoding not implemented")
}
}
func (h CommandsHandler) HandleMessage(msg RawMessage) ([]byte, error) {
switch mt := msg.Type; mt {
case MessageTypeBinary:
return processBinary(msg.Bytes, h.Processor)
default:
return nil, fmt.Errorf("unsupported message encoding: %v", mt)
}
}