[awsfirehosereceiver] Add auto type

.chloggen/auto-record-type.yaml

@@ -0,0 +1,27 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: enhancement
+
+# The name of the component, or a single word describing the area of concern, (e.g. filelogreceiver)
+component: awsfirehosereceiver
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Add auto record type.
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [36708]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext: Add the auto record type, capable of distinguishing between all current possible record types.
+
+# If your change doesn't affect end users or the exported elements of any package,
+# you should instead start your pull request title with [chore] or use the "Skip Changelog" label.
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: []

receiver/awsfirehosereceiver/factory.go

@@ -16,6 +16,7 @@ import (
 	"github.com/open-telemetry/opentelemetry-collector-contrib/internal/common/testutil"
 	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/awsfirehosereceiver/internal/metadata"
 	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/awsfirehosereceiver/internal/unmarshaler"
+	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/awsfirehosereceiver/internal/unmarshaler/auto"
 	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/awsfirehosereceiver/internal/unmarshaler/cwlog"
 	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/awsfirehosereceiver/internal/unmarshaler/cwmetricstream"
 	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/awsfirehosereceiver/internal/unmarshaler/otlpmetricstream"
@@ -32,6 +33,7 @@ var (
 		cwmetricstream.TypeStr:   true,
 		cwlog.TypeStr:            true,
 		otlpmetricstream.TypeStr: true,
+		auto.TypeStr:             true,
 	}
 )
 
@@ -59,17 +61,21 @@ func validateRecordType(recordType string) error {
 func defaultMetricsUnmarshalers(logger *zap.Logger) map[string]unmarshaler.MetricsUnmarshaler {
 	cwmsu := cwmetricstream.NewUnmarshaler(logger)
 	otlpv1msu := otlpmetricstream.NewUnmarshaler(logger)
+	autoUnmarshaler := auto.NewUnmarshaler(logger)
 	return map[string]unmarshaler.MetricsUnmarshaler{
 		cwmsu.Type():     cwmsu,
 		otlpv1msu.Type(): otlpv1msu,
+		auto.TypeStr:     autoUnmarshaler,
 	}
 }
 
 // defaultLogsUnmarshalers creates a map of the available logs unmarshalers.
 func defaultLogsUnmarshalers(logger *zap.Logger) map[string]unmarshaler.LogsUnmarshaler {
 	u := cwlog.NewUnmarshaler(logger)
+	autoUnmarshaler := auto.NewUnmarshaler(logger)
 	return map[string]unmarshaler.LogsUnmarshaler{
-		u.Type(): u,
+		u.Type():     u,
+		auto.TypeStr: autoUnmarshaler,
 	}
 }
 

receiver/awsfirehosereceiver/factory_test.go

@@ -12,6 +12,7 @@ import (
 	"go.opentelemetry.io/collector/consumer/consumertest"
 	"go.opentelemetry.io/collector/receiver/receivertest"
 
+	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/awsfirehosereceiver/internal/unmarshaler/auto"
 	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/awsfirehosereceiver/internal/unmarshaler/otlpmetricstream"
 )
 
@@ -46,5 +47,6 @@ func TestValidateRecordType(t *testing.T) {
 	require.NoError(t, validateRecordType(defaultMetricsRecordType))
 	require.NoError(t, validateRecordType(defaultLogsRecordType))
 	require.NoError(t, validateRecordType(otlpmetricstream.TypeStr))
+	require.NoError(t, validateRecordType(auto.TypeStr))
 	require.Error(t, validateRecordType("nop"))
 }

receiver/awsfirehosereceiver/internal/unmarshaler/auto/unmarshaller.go

@@ -0,0 +1,225 @@
+package auto
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"github.com/gogo/protobuf/proto"
+	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/awsfirehosereceiver/internal/unmarshaler"
+	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/awsfirehosereceiver/internal/unmarshaler/cwlog"
+	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/awsfirehosereceiver/internal/unmarshaler/cwmetricstream"
+	"go.opentelemetry.io/collector/pdata/plog"
+	"go.opentelemetry.io/collector/pdata/pmetric"
+	"go.opentelemetry.io/collector/pdata/pmetric/pmetricotlp"
+	"go.uber.org/zap"
+)
+
+const (
+	TypeStr         = "auto"
+	recordDelimiter = "\n"
+)
+
+var (
+	errInvalidRecords         = errors.New("record format invalid")
+	errUnsupportedContentType = errors.New("content type not supported")
+	errInvalidFormatStart     = errors.New("unable to decode data length from message")
+)
+
+// Unmarshaler for the CloudWatch Log JSON record format.
+type Unmarshaler struct {
+	logger *zap.Logger
+}
+
+var _ unmarshaler.Unmarshaler = (*Unmarshaler)(nil)
+
+// NewUnmarshaler creates a new instance of the Unmarshaler.
+func NewUnmarshaler(logger *zap.Logger) *Unmarshaler {
+	return &Unmarshaler{logger}
+}
+
+// isJSON returns true if record starts with { and ends with }
+func isJSON(record []byte) bool {
+	if len(record) < 2 {
+		return false
+	}
+	return record[0] == '{' && record[len(record)-1] == '}'
+}
+
+// isCloudWatchLog checks if the data has the entries needed to be considered a cloudwatch log
+func isCloudWatchLog(data []byte) bool {
+	if !bytes.Contains(data, []byte(`"owner":`)) {
+		return false
+	}
+	if !bytes.Contains(data, []byte(`"logGroup":`)) {
+		return false
+	}
+	if !bytes.Contains(data, []byte(`"logStream":`)) {
+		return false
+	}
+	return true
+}
+
+// isCloudwatchMetrics checks if the data has the entries needed to be considered a cloudwatch metric
+func isCloudwatchMetrics(data []byte) bool {
+	if !bytes.Contains(data, []byte(`"metric_name":`)) {
+		return false
+	}
+	if !bytes.Contains(data, []byte(`"namespace":`)) {
+		return false
+	}
+	if !bytes.Contains(data, []byte(`"unit":`)) {
+		return false
+	}
+	if !bytes.Contains(data, []byte(`"value":`)) {
+		return false
+	}
+	return true
+}
+
+// addCloudwatchLog unmarshalls the record to a cwlog.CWLog and adds
+// it to the logs
+func (u *Unmarshaler) addCloudwatchLog(
+	record []byte,
+	resourceLogs map[cwlog.ResourceAttributes]*cwlog.ResourceLogsBuilder,
+	ld plog.Logs,
+) error {
+	var log cwlog.CWLog
+	if err := json.Unmarshal(record, &log); err != nil {
+		return err
+	}
+	attrs := cwlog.ResourceAttributes{
+		Owner:     log.Owner,
+		LogGroup:  log.LogGroup,
+		LogStream: log.LogStream,
+	}
+	lb, exists := resourceLogs[attrs]
+	if !exists {
+		lb = cwlog.NewResourceLogsBuilder(ld, attrs)
+		resourceLogs[attrs] = lb
+	}
+	lb.AddLog(log)
+	return nil
+}
+
+// addCloudwatchMetric unmarshalls the record to a cwmetric.CWMetric and adds
+// it to the metrics
+func (u *Unmarshaler) addCloudwatchMetric(
+	record []byte,
+	resourceMetrics map[cwmetricstream.ResourceAttributes]*cwmetricstream.ResourceMetricsBuilder,
+	md pmetric.Metrics,
+) error {
+	var metric cwmetricstream.CWMetric
+	if err := json.Unmarshal(record, &metric); err != nil {
+		return err
+	}
+	attrs := cwmetricstream.ResourceAttributes{
+		MetricStreamName: metric.MetricStreamName,
+		Namespace:        metric.Namespace,
+		AccountID:        metric.AccountID,
+		Region:           metric.Region,
+	}
+	mb, exists := resourceMetrics[attrs]
+	if !exists {
+		mb = cwmetricstream.NewResourceMetricsBuilder(md, attrs)
+		resourceMetrics[attrs] = mb
+	}
+	mb.AddMetric(metric)
+	return nil
+}
+
+func (u *Unmarshaler) UnmarshalLogs(records [][]byte) (plog.Logs, error) {
+	ld := plog.NewLogs()
+	cloudwatchLogs := make(map[cwlog.ResourceAttributes]*cwlog.ResourceLogsBuilder)
+	for i, record := range records {
+		if isJSON(record) {
+			if isCloudWatchLog(record) {
+				if err := u.addCloudwatchLog(record, cloudwatchLogs, ld); err != nil {
+					u.logger.Error(
+						"Unable to unmarshal record to cloudwatch log",
+						zap.Error(err),
+						zap.Int("record_index", i),
+					)
+				}
+			} else {
+				u.logger.Error(
+					"Unsupported log type",
+					zap.Int("record_index", i),
+				)
+			}
+		} else {
+			u.logger.Error(
+				"Unsupported log type",
+				zap.Int("record_index", i),
+			)
+		}
+	}
+
+	if ld.LogRecordCount() == 0 {
+		return ld, errInvalidRecords
+	}
+	return ld, nil
+}
+
+func (u *Unmarshaler) addOTLPMetric(record []byte, md pmetric.Metrics) error {
+	dataLen, pos := len(record), 0
+	for pos < dataLen {
+		n, nLen := proto.DecodeVarint(record)
+		if nLen == 0 && n == 0 {
+			return errors.New("unable to decode data length from message")
+		}
+		req := pmetricotlp.NewExportRequest()
+		pos += nLen
+		if err := req.UnmarshalProto(record[pos : pos+int(n)]); err != nil {
+			return err
+		}
+		pos += int(n)
+		req.Metrics().ResourceMetrics().MoveAndAppendTo(md.ResourceMetrics())
+	}
+	return nil
+}
+
+func (u *Unmarshaler) UnmarshalMetrics(records [][]byte) (pmetric.Metrics, error) {
+	md := pmetric.NewMetrics()
+	cloudwatchMetrics := make(map[cwmetricstream.ResourceAttributes]*cwmetricstream.ResourceMetricsBuilder)
+	for i, record := range records {
+		if isJSON(record) {
+			if isCloudwatchMetrics(record) {
+				if err := u.addCloudwatchMetric(record, cloudwatchMetrics, md); err != nil {
+					u.logger.Error(
+						"Unable to unmarshal input",
+						zap.Error(err),
+						zap.Int("record_index", i),
+					)
+				}
+			} else {
+				u.logger.Error(
+					"Unsupported metric type",
+					zap.Int("record_index", i),
+				)
+			}
+		} else { // is protobuf
+			// OTLP metric is the only option currently supported
+			if err := u.addOTLPMetric(record, md); err != nil {
+				u.logger.Error(
+					"failed to unmarshall ExportRequest from proto bytes",
+					zap.Int("record_index", i),
+					zap.Error(err),
+				)
+			} else {
+				u.logger.Error(
+					"Unsupported metric type",
+					zap.Int("record_index", i),
+				)
+			}
+		}
+	}
+
+	if md.MetricCount() == 0 {
+		return md, errInvalidRecords
+	}
+	return md, nil
+}
+
+func (u *Unmarshaler) Type() string {
+	return TypeStr
+}