Add library instrumentation docs (#3176)

README.md

@@ -54,6 +54,11 @@ You can also configure the agent and exporter via command line arguments
 or environment variables. The net result is the ability to gather telemetry
 data from a Java application without code changes.
 
+This repository also publishes standalone instrumentation for several libraries (and growing)
+that can be used if you prefer that over using the Java agent.
+Please see [standalone library instrumentation](docs/standalone-library-instrumentation.md)
+if you are looking for documentation on using those.
+
 ## Getting Started
 
 Download the [latest version](https://github.com/open-telemetry/opentelemetry-java-instrumentation/releases/latest/download/opentelemetry-javaagent-all.jar).

docs/standalone-library-instrumentation.md

@@ -0,0 +1,27 @@
+# Standalone library instrumentation
+
+This repository also publishes standalone instrumentation for several libraries (and growing)
+that can be used if you prefer that over using the Java agent:
+
+* [Apache Dubbo](../instrumentation/apache-dubbo-2.7/library)
+* [Armeria](../instrumentation/armeria-1.3/library)
+* [AWS Lambda](../instrumentation/aws-lambda-1.0/library)
+* [AWS SDK 1.11](../instrumentation/aws-sdk/aws-sdk-1.11/library)
+* [AWS SDK 2.2+](../instrumentation/aws-sdk/aws-sdk-2.2/library)
+* [gRPC](../instrumentation/grpc-1.6/library)
+* [Guava](../instrumentation/guava-10.0/library)
+* [Lettuce](../instrumentation/lettuce/lettuce-5.1/library)
+* [Log4j](../instrumentation/log4j/log4j-2.13.2/library)
+* [Logback](../instrumentation/logback-1.0/library)
+* [MongoDB Driver](../instrumentation/mongo/mongo-3.1/library)
+* [OkHttp](../instrumentation/okhttp/okhttp-3.0/library)
+* [OSHI](../instrumentation/oshi/library)
+* [Reactor](../instrumentation/reactor-3.1/library)
+* [RocketMQ](../instrumentation/rocketmq-client-4.8/library)
+* [Runtime metrics](../instrumentation/runtime-metrics/library)
+* [RxJava 1.0](../instrumentation/rxjava/rxjava-1.0/library)
+* [RxJava 2.0](../instrumentation/rxjava/rxjava-2.0/library)
+* [RxJava 3.0](../instrumentation/rxjava/rxjava-3.0/library)
+* [Spring RestTemplate](../instrumentation/spring/spring-web-3.1/library)
+* [Spring Web MVC](../instrumentation/spring/spring-webmvc-3.1/library)
+* [Spring WebFlux Client](../instrumentation/spring/spring-webflux-5.0/library)

docs/supported-libraries.md

@@ -70,7 +70,7 @@ These are the supported libraries and frameworks:
 | [Logback](http:https://logback.qos.ch/) | 1.0+ |
 | [Metro](https://projects.eclipse.org/projects/ee4j.metro) | 2.2+ (not including 3.x yet) |
 | [Mojarra](https://projects.eclipse.org/projects/ee4j.mojarra) | 1.2+ (not including 3.x yet) |
-| [MongoDB Drivers](https://mongodb.github.io/mongo-java-driver/) | 3.3+ |
+| [MongoDB Driver](https://mongodb.github.io/mongo-java-driver/)  | 3.1+ |
 | [MyFaces](https://myfaces.apache.org/) | 1.2+ (not including 3.x yet) |
 | [Netty](https://github.com/netty/netty) | 3.8+ |
 | [OkHttp](https://github.com/square/okhttp/) | 3.0+ |