Add docs for library instrumentation of RocketMQ remoting-based client

instrumentation/rocketmq/rocketmq-client/rocketmq-client-4.8/README.md

@@ -1,4 +1,4 @@
-# Settings for the Apache RocketMQ client instrumentation
+# Settings for the Apache RocketMQ Remoting-based client instrumentation
 
 | System property | Type | Default | Description |
 |---|---|---|---|

instrumentation/rocketmq/rocketmq-client/rocketmq-client-4.8/library/README.md

@@ -0,0 +1,47 @@
+# Manual Instrumentation for Apache RocketMQ Remoting-based Client version 4.0.0+
+
+Provides OpenTelemetry instrumentation for [Apache RocketMQ](https://rocketmq.apache.org/) Remoting-based Client.
+
+## Quickstart
+
+### Add the following dependencies to your project:
+
+Replace `OPENTELEMETRY_VERSION` with the latest stable
+[release](https://mvnrepository.com/artifact/io.opentelemetry). Minimum version is 1.1.0.
+
+For Maven, add the following to your `pom.xml` dependencies:
+
+```xml
+
+<dependencies>
+  <dependency>
+    <groupId>io.opentelemetry.instrumentation</groupId>
+    <artifactId>opentelemetry-rocketmq-client-4.8</artifactId>
+    <version>OPENTELEMETRY_VERSION</version>
+  </dependency>
+</dependencies>
+```
+
+For Gradle, add the following to your dependencies:
+
+```groovy
+implementation("io.opentelemetry.instrumentation:opentelemetry-rocketmq-client-4.8:OPENTELEMETRY_VERSION")
+```
+
+### Usage
+
+Remoting-based Client of RocketMQ provides the native interceptor to register the message hook in the instrumentation library.
+
+```java
+RocketMqTelemetry rocketMqTelemetry;
+
+void configure(OpenTelemetry openTelemetry, DefaultMQProducerImpl producer, DefaultMQPushConsumerImpl pushConsumer) {
+  rocketMqTelemetry = RocketMqTelemetry.create(openTelemetry);
+  // For producer.
+  SendMessageHook sendMessageHook = rocketMqTelemetry.newTracingSendMessageHook();
+  producer.registerSendMessageHook(sendMessageHook);
+  // For push consumer.
+  ConsumeMessageHook consumeMessageHook = rocketMqTelemetry.newTracingConsumeMessageHook();
+  pushConsumer.registerConsumeMessageHook(consumeMessageHook);
+}
+```