[connector/otlpjson] Add connector's implementations (#34249)

**Description:** <Describe what has changed.>
<!--Ex. Fixing a bug - Describe the bug and how this fixes the issue.
Ex. Adding a feature - Explain what this achieves.-->
This is the 2nd PR for the new `otlpjson` connector
(#34208).
Adds the `ConsumeLogs` methods for the logs, metrics and traces
respective connector types.

At the moment, the connector retrieves the otlp json from the incoming
Log's `Body`. This is not configurable yet. It can be decided if that
needs to be.

In addition, there is no attribute/metadata extraction/transfer from the
incoming Log. This can be added in future iterations.

**Link to tracking Issue:** <Issue number if applicable>
#34208
#34239

**Testing:** <Describe what testing was performed and which tests were
added.> Added.

**Documentation:** <Describe the documentation added.> ~

Signed-off-by: ChrsMark <chrismarkou92@gmail.com>

.chloggen/implement_oltpjson_connector.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: otlpjsonconnector
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Add connector's implementations
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [34249, 34208]
+
+# (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:
+
+# 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: []

connector/otlpjsonconnector/factory_test.go

@@ -6,11 +6,18 @@ package otlpjsonconnector
 import (
 	"context"
 	"testing"
+	"time"
 
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"go.opentelemetry.io/collector/component/componenttest"
 	"go.opentelemetry.io/collector/connector/connectortest"
 	"go.opentelemetry.io/collector/consumer"
+	"go.opentelemetry.io/collector/consumer/consumertest"
 	"go.opentelemetry.io/collector/pdata/plog"
+	"go.opentelemetry.io/collector/pdata/pmetric"
+	"go.opentelemetry.io/collector/pdata/ptrace"
+	"go.opentelemetry.io/collector/pdata/testdata"
 )
 
 func TestNewFactory(t *testing.T) {
@@ -28,3 +35,93 @@ func TestNewFactory(t *testing.T) {
 	assert.NoError(t, err)
 	assert.NotNil(t, conn)
 }
+
+func TestLogsToLogs(t *testing.T) {
+	factory := NewFactory()
+	cfg := factory.CreateDefaultConfig().(*Config)
+
+	sink := &consumertest.LogsSink{}
+	conn, err := factory.CreateLogsToLogs(context.Background(),
+		connectortest.NewNopSettings(), cfg, sink)
+	require.NoError(t, err)
+	require.NotNil(t, conn)
+	assert.False(t, conn.Capabilities().MutatesData)
+
+	require.NoError(t, conn.Start(context.Background(), componenttest.NewNopHost()))
+	defer func() {
+		assert.NoError(t, conn.Shutdown(context.Background()))
+	}()
+
+	lp := testdata.GenerateLogs(1)
+	marshaler := &plog.JSONMarshaler{}
+	b, err := marshaler.MarshalLogs(lp)
+	require.NoError(t, err)
+
+	testLogs := testdata.GenerateLogs(1)
+	testLogs.ResourceLogs().At(0).ScopeLogs().At(0).LogRecords().At(0).Body().SetStr(string(b))
+	assert.NoError(t, conn.ConsumeLogs(context.Background(), testLogs))
+
+	time.Sleep(1 * time.Second)
+	require.Len(t, sink.AllLogs(), 1)
+	assert.EqualValues(t, lp, sink.AllLogs()[0])
+}
+
+func TestLogsToMetrics(t *testing.T) {
+	factory := NewFactory()
+	cfg := factory.CreateDefaultConfig().(*Config)
+
+	sink := &consumertest.MetricsSink{}
+	conn, err := factory.CreateLogsToMetrics(context.Background(),
+		connectortest.NewNopSettings(), cfg, sink)
+	require.NoError(t, err)
+	require.NotNil(t, conn)
+	assert.False(t, conn.Capabilities().MutatesData)
+
+	require.NoError(t, conn.Start(context.Background(), componenttest.NewNopHost()))
+	defer func() {
+		assert.NoError(t, conn.Shutdown(context.Background()))
+	}()
+
+	mt := testdata.GenerateMetrics(1)
+	marshaler := &pmetric.JSONMarshaler{}
+	b, err := marshaler.MarshalMetrics(mt)
+	require.NoError(t, err)
+
+	testLogs := testdata.GenerateLogs(1)
+	testLogs.ResourceLogs().At(0).ScopeLogs().At(0).LogRecords().At(0).Body().SetStr(string(b))
+	assert.NoError(t, conn.ConsumeLogs(context.Background(), testLogs))
+
+	time.Sleep(1 * time.Second)
+	require.Len(t, sink.AllMetrics(), 1)
+	assert.EqualValues(t, mt, sink.AllMetrics()[0])
+}
+
+func TestLogsToTraces(t *testing.T) {
+	factory := NewFactory()
+	cfg := factory.CreateDefaultConfig().(*Config)
+
+	sink := &consumertest.TracesSink{}
+	conn, err := factory.CreateLogsToTraces(context.Background(),
+		connectortest.NewNopSettings(), cfg, sink)
+	require.NoError(t, err)
+	require.NotNil(t, conn)
+	assert.False(t, conn.Capabilities().MutatesData)
+
+	require.NoError(t, conn.Start(context.Background(), componenttest.NewNopHost()))
+	defer func() {
+		assert.NoError(t, conn.Shutdown(context.Background()))
+	}()
+
+	td := testdata.GenerateTraces(1)
+	marshaler := &ptrace.JSONMarshaler{}
+	b, err := marshaler.MarshalTraces(td)
+	require.NoError(t, err)
+
+	testLogs := testdata.GenerateLogs(1)
+	testLogs.ResourceLogs().At(0).ScopeLogs().At(0).LogRecords().At(0).Body().SetStr(string(b))
+	assert.NoError(t, conn.ConsumeLogs(context.Background(), testLogs))
+
+	time.Sleep(1 * time.Second)
+	require.Len(t, sink.AllTraces(), 1)
+	assert.EqualValues(t, td, sink.AllTraces()[0])
+}

connector/otlpjsonconnector/go.mod

@@ -9,6 +9,7 @@ require (
 	go.opentelemetry.io/collector/connector v0.105.1-0.20240717163034-43ed6184f9fe
 	go.opentelemetry.io/collector/consumer v0.105.1-0.20240717163034-43ed6184f9fe
 	go.opentelemetry.io/collector/pdata v1.12.1-0.20240716231837-5753a58f712b
+	go.opentelemetry.io/collector/pdata/testdata v0.105.0
 	go.uber.org/goleak v1.3.0
 	go.uber.org/zap v1.27.0
 )
@@ -41,6 +42,7 @@ require (
 	go.opentelemetry.io/collector/config/configtelemetry v0.105.1-0.20240717163034-43ed6184f9fe // indirect
 	go.opentelemetry.io/collector/featuregate v1.12.1-0.20240716231837-5753a58f712b // indirect
 	go.opentelemetry.io/collector/internal/globalgates v0.105.0 // indirect
+	go.opentelemetry.io/collector/pdata/pprofile v0.105.0 // indirect
 	go.opentelemetry.io/otel v1.28.0 // indirect
 	go.opentelemetry.io/otel/exporters/prometheus v0.50.0 // indirect
 	go.opentelemetry.io/otel/metric v1.28.0 // indirect

connector/otlpjsonconnector/logs.go

@@ -40,6 +40,24 @@ func (c *connectorLogs) Capabilities() consumer.Capabilities {
 }
 
 // ConsumeLogs method is called for each instance of a log sent to the connector
-func (c *connectorLogs) ConsumeLogs(_ context.Context, _ plog.Logs) error {
+func (c *connectorLogs) ConsumeLogs(ctx context.Context, pl plog.Logs) error {
+	// loop through the levels of logs
+	logsUnmarshaler := &plog.JSONUnmarshaler{}
+	for i := 0; i < pl.ResourceLogs().Len(); i++ {
+		li := pl.ResourceLogs().At(i)
+		for j := 0; j < li.ScopeLogs().Len(); j++ {
+			logRecord := li.ScopeLogs().At(j)
+			for k := 0; k < logRecord.LogRecords().Len(); k++ {
+				lRecord := logRecord.LogRecords().At(k)
+				token := lRecord.Body()
+				var l plog.Logs
+				l, _ = logsUnmarshaler.UnmarshalLogs([]byte(token.AsString()))
+				err := c.logsConsumer.ConsumeLogs(ctx, l)
+				if err != nil {
+					c.logger.Error("could not extract logs from otlp json", zap.Error(err))
+				}
+			}
+		}
+	}
 	return nil
 }

connector/otlpjsonconnector/metrics.go

@@ -10,6 +10,7 @@ import (
 	"go.opentelemetry.io/collector/connector"
 	"go.opentelemetry.io/collector/consumer"
 	"go.opentelemetry.io/collector/pdata/plog"
+	"go.opentelemetry.io/collector/pdata/pmetric"
 	"go.uber.org/zap"
 )
 
@@ -40,6 +41,24 @@ func (c *connectorMetrics) Capabilities() consumer.Capabilities {
 }
 
 // ConsumeLogs method is called for each instance of a log sent to the connector
-func (c *connectorMetrics) ConsumeLogs(_ context.Context, _ plog.Logs) error {
+func (c *connectorMetrics) ConsumeLogs(ctx context.Context, pl plog.Logs) error {
+	// loop through the levels of logs
+	metricsUnmarshaler := &pmetric.JSONUnmarshaler{}
+	for i := 0; i < pl.ResourceLogs().Len(); i++ {
+		li := pl.ResourceLogs().At(i)
+		for j := 0; j < li.ScopeLogs().Len(); j++ {
+			logRecord := li.ScopeLogs().At(j)
+			for k := 0; k < logRecord.LogRecords().Len(); k++ {
+				lRecord := logRecord.LogRecords().At(k)
+				token := lRecord.Body()
+				var m pmetric.Metrics
+				m, _ = metricsUnmarshaler.UnmarshalMetrics([]byte(token.AsString()))
+				err := c.metricsConsumer.ConsumeMetrics(ctx, m)
+				if err != nil {
+					c.logger.Error("could not extract metrics from otlp json", zap.Error(err))
+				}
+			}
+		}
+	}
 	return nil
 }

connector/otlpjsonconnector/traces.go

@@ -10,6 +10,7 @@ import (
 	"go.opentelemetry.io/collector/connector"
 	"go.opentelemetry.io/collector/consumer"
 	"go.opentelemetry.io/collector/pdata/plog"
+	"go.opentelemetry.io/collector/pdata/ptrace"
 	"go.uber.org/zap"
 )
 
@@ -40,6 +41,24 @@ func (c *connectorTraces) Capabilities() consumer.Capabilities {
 }
 
 // ConsumeLogs method is called for each instance of a log sent to the connector
-func (c *connectorTraces) ConsumeLogs(_ context.Context, _ plog.Logs) error {
+func (c *connectorTraces) ConsumeLogs(ctx context.Context, pl plog.Logs) error {
+	// loop through the levels of logs
+	tracesUnmarshaler := &ptrace.JSONUnmarshaler{}
+	for i := 0; i < pl.ResourceLogs().Len(); i++ {
+		li := pl.ResourceLogs().At(i)
+		for j := 0; j < li.ScopeLogs().Len(); j++ {
+			logRecord := li.ScopeLogs().At(j)
+			for k := 0; k < logRecord.LogRecords().Len(); k++ {
+				lRecord := logRecord.LogRecords().At(k)
+				token := lRecord.Body()
+				var t ptrace.Traces
+				t, _ = tracesUnmarshaler.UnmarshalTraces([]byte(token.AsString()))
+				err := c.tracesConsumer.ConsumeTraces(ctx, t)
+				if err != nil {
+					c.logger.Error("could not extract traces from otlp json", zap.Error(err))
+				}
+			}
+		}
+	}
 	return nil
 }