[wip] Add skeleton for the otlpjson connector (#34239)

**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 first PR for the new `otlpjson` connector. Includes the
overall structure of the new component.

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

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

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

/cc @djaglowski

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

.chloggen/add_otlpjson_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: new_component
+
+# 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: New component that will allow extracting otlpjson data from incoming Logs.
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [34239, 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: []

.github/CODEOWNERS

@@ -29,6 +29,7 @@ connector/datadogconnector/                                         @open-teleme
 connector/exceptionsconnector/                                      @open-telemetry/collector-contrib-approvers @jpkrohling @marctc
 connector/failoverconnector/                                        @open-telemetry/collector-contrib-approvers @akats7 @djaglowski @fatsheep9146
 connector/grafanacloudconnector/                                    @open-telemetry/collector-contrib-approvers @jpkrohling @rlankfo @jcreixell
+connector/otlpjsonconnector/                                        @open-telemetry/collector-contrib-approvers @djaglowski @ChrsMark
 connector/roundrobinconnector/                                      @open-telemetry/collector-contrib-approvers @bogdandrutu
 connector/routingconnector/                                         @open-telemetry/collector-contrib-approvers @jpkrohling @mwear
 connector/servicegraphconnector/                                    @open-telemetry/collector-contrib-approvers @jpkrohling @mapno @JaredTan95

.github/ISSUE_TEMPLATE/bug_report.yaml

@@ -30,6 +30,7 @@ body:
       - connector/exceptions
       - connector/failover
       - connector/grafanacloud
+      - connector/otlpjson
       - connector/roundrobin
       - connector/routing
       - connector/servicegraph

.github/ISSUE_TEMPLATE/feature_request.yaml

@@ -24,6 +24,7 @@ body:
       - connector/exceptions
       - connector/failover
       - connector/grafanacloud
+      - connector/otlpjson
       - connector/roundrobin
       - connector/routing
       - connector/servicegraph

.github/ISSUE_TEMPLATE/other.yaml

@@ -24,6 +24,7 @@ body:
       - connector/exceptions
       - connector/failover
       - connector/grafanacloud
+      - connector/otlpjson
       - connector/roundrobin
       - connector/routing
       - connector/servicegraph

.github/ISSUE_TEMPLATE/unmaintained.yaml

@@ -29,6 +29,7 @@ body:
       - connector/exceptions
       - connector/failover
       - connector/grafanacloud
+      - connector/otlpjson
       - connector/roundrobin
       - connector/routing
       - connector/servicegraph

connector/otlpjsonconnector/Makefile

@@ -0,0 +1 @@
+include ../../Makefile.Common

connector/otlpjsonconnector/README.md

@@ -0,0 +1,68 @@
+# otlpjson Connector
+
+<!-- status autogenerated section -->
+| Status        |           |
+| ------------- |-----------|
+| Distributions | [contrib] |
+| Issues        | [![Open issues](https://img.shields.io/github/issues-search/open-telemetry/opentelemetry-collector-contrib?query=is%3Aissue%20is%3Aopen%20label%3Aconnector%2Fotlpjson%20&label=open&color=orange&logo=opentelemetry)](https://github.com/open-telemetry/opentelemetry-collector-contrib/issues?q=is%3Aopen+is%3Aissue+label%3Aconnector%2Fotlpjson) [![Closed issues](https://img.shields.io/github/issues-search/open-telemetry/opentelemetry-collector-contrib?query=is%3Aissue%20is%3Aclosed%20label%3Aconnector%2Fotlpjson%20&label=closed&color=blue&logo=opentelemetry)](https://github.com/open-telemetry/opentelemetry-collector-contrib/issues?q=is%3Aclosed+is%3Aissue+label%3Aconnector%2Fotlpjson) |
+| [Code Owners](https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/CONTRIBUTING.md#becoming-a-code-owner)    | [@djaglowski](https://www.github.com/djaglowski), [@ChrsMark](https://www.github.com/ChrsMark) |
+
+[development]: https://github.com/open-telemetry/opentelemetry-collector#development
+[contrib]: https://github.com/open-telemetry/opentelemetry-collector-releases/tree/main/distributions/otelcol-contrib
+
+## Supported Pipeline Types
+
+| [Exporter Pipeline Type] | [Receiver Pipeline Type] | [Stability Level] |
+| ------------------------ | ------------------------ | ----------------- |
+| logs | metrics | [development] |
+| logs | traces | [development] |
+| logs | logs | [development] |
+
+[Exporter Pipeline Type]: https://github.com/open-telemetry/opentelemetry-collector/blob/main/connector/README.md#exporter-pipeline-type
+[Receiver Pipeline Type]: https://github.com/open-telemetry/opentelemetry-collector/blob/main/connector/README.md#receiver-pipeline-type
+[Stability Level]: https://github.com/open-telemetry/opentelemetry-collector#stability-levels
+<!-- end autogenerated section -->
+
+Allows to extract otlpjson data from incoming Logs and specifically the `Body` field.
+The data is written in
+[Protobuf JSON
+encoding](https://developers.google.com/protocol-buffers/docs/proto3#json)
+using [OpenTelemetry
+protocol](https://github.com/open-telemetry/opentelemetry-proto).
+
+## Configuration
+
+#### Configuration Example:
+
+```yaml
+receivers:
+  filelog:
+    include:
+      - /var/log/foo.log
+
+exporters:
+  debug:
+
+connectors:
+  otlpjson:
+
+service:
+  pipelines:
+    logs/raw:
+      receivers: [filelog]
+      exporters: [otlpjson]
+    metrics/otlp:
+      receivers: [otlpjson]
+      exporters: [debug]
+    logs/otlp:
+      receivers: [otlpjson]
+      exporters: [debug]
+    traces/otlp:
+      receivers: [otlpjson]
+      exporters: [debug]
+```
+
+[Connectors README]:https://github.com/open-telemetry/opentelemetry-collector/blob/main/connector/README.md
+[Exporter Pipeline Type]:https://github.com/open-telemetry/opentelemetry-collector/blob/main/connector/README.md#exporter-pipeline-type
+[Receiver Pipeline Type]:https://github.com/open-telemetry/opentelemetry-collector/blob/main/connector/README.md#receiver-pipeline-type
+[contrib]:https://github.com/open-telemetry/opentelemetry-collector-releases/tree/main/distributions/otelcol-contrib

connector/otlpjsonconnector/config.go

@@ -0,0 +1,10 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package otlpjsonconnector // import "github.com/open-telemetry/opentelemetry-collector-contrib/connector/otlpjsonconnector"
+
+type Config struct{}
+
+func (c *Config) Validate() error {
+	return nil
+}

connector/otlpjsonconnector/config_test.go

@@ -0,0 +1,4 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package otlpjsonconnector

connector/otlpjsonconnector/doc.go

@@ -0,0 +1,6 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+//go:generate mdatagen metadata.yaml
+
+package otlpjsonconnector // import "github.com/open-telemetry/opentelemetry-collector-contrib/connector/otlpjsonconnector"

connector/otlpjsonconnector/factory.go

@@ -0,0 +1,60 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package otlpjsonconnector // import "github.com/open-telemetry/opentelemetry-collector-contrib/connector/otlpjsonconnector"
+
+import (
+	"context"
+
+	"go.opentelemetry.io/collector/component"
+	"go.opentelemetry.io/collector/connector"
+	"go.opentelemetry.io/collector/consumer"
+
+	"github.com/open-telemetry/opentelemetry-collector-contrib/connector/otlpjsonconnector/internal/metadata"
+)
+
+// NewFactory returns a ConnectorFactory.
+func NewFactory() connector.Factory {
+	return connector.NewFactory(
+		metadata.Type,
+		createDefaultConfig,
+		connector.WithLogsToTraces(createTracesConnector, component.StabilityLevelAlpha),
+		connector.WithLogsToMetrics(createMetricsConnector, component.StabilityLevelAlpha),
+		connector.WithLogsToLogs(createLogsConnector, component.StabilityLevelAlpha),
+	)
+}
+
+// createDefaultConfig creates the default configuration.
+func createDefaultConfig() component.Config {
+	return &Config{}
+}
+
+// createLogsConnector returns a connector which consume logs and export logs
+func createLogsConnector(
+	_ context.Context,
+	set connector.Settings,
+	cfg component.Config,
+	nextConsumer consumer.Logs,
+) (connector.Logs, error) {
+	return newLogsConnector(set, cfg, nextConsumer), nil
+}
+
+// createTracesConnector returns a connector which consume logs and export traces
+func createTracesConnector(
+	_ context.Context,
+	set connector.Settings,
+	cfg component.Config,
+	nextConsumer consumer.Traces,
+) (connector.Logs, error) {
+	return newTracesConnector(set, cfg, nextConsumer), nil
+}
+
+// createMetricsConnector returns a connector which consume logs and export metrics
+func createMetricsConnector(
+	_ context.Context,
+	set connector.Settings,
+	cfg component.Config,
+	nextConsumer consumer.Metrics,
+) (connector.Logs, error) {
+	return newMetricsConnector(set, cfg, nextConsumer), nil
+}

connector/otlpjsonconnector/factory_test.go

@@ -0,0 +1,30 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package otlpjsonconnector
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"go.opentelemetry.io/collector/connector/connectortest"
+	"go.opentelemetry.io/collector/consumer"
+	"go.opentelemetry.io/collector/pdata/plog"
+)
+
+func TestNewFactory(t *testing.T) {
+	cfg := &Config{}
+
+	lc, err := consumer.NewLogs(func(context.Context, plog.Logs) error {
+		return nil
+	})
+	assert.NoError(t, err)
+
+	factory := NewFactory()
+	conn, err := factory.CreateLogsToLogs(context.Background(),
+		connectortest.NewNopSettings(), cfg, lc)
+
+	assert.NoError(t, err)
+	assert.NotNil(t, conn)
+}