DOCS-9341: adding languages for manual instrumentation (#25941)

* adding languages for manual instrumentation

* formatting

content/en/data_streams/java_manual_instrumentation.md → content/en/data_streams/manual_instrumentation.md

@@ -1,6 +1,8 @@
 ---
 title: Set up Data Streams Monitoring for Java through Manual Instrumentation
 private: true
+aliases:
+  - /data_streams/java_manual_instrumentation
 further_reading:
     - link: '/integrations/kafka/'
       tag: 'Documentation'
@@ -10,9 +12,12 @@ further_reading:
       text: 'Service Catalog'
 ---
 
-<div class="alert alert-info">Manual instrumentation is available for Java. For a list of technologies supported in Java today, see <a href="/data_streams/#setup">Data Streams Monitoring Setup</a>.<br /><br />If you're interested in manual instrumentation for additional languages, reach out to [email protected].</div>
+<div class="alert alert-info">Manual instrumentation is available for Java, Node.js, and Python. <br /><br />If you're interested in manual instrumentation for additional languages, reach out to [email protected].</div>
 
-Data Streams Monitoring propagates context through message headers. If you use a message queue technology that is not yet supported by DSM, a technology without headers (such as Kinesis), or lambdas, use manual instrumentation to set up Data Streams Monitoring.
+Data Streams Monitoring (DSM) propagates context through message headers. Use manual instrumentation to set up DSM if you are using:
+- a message queue technology that is not supported by DSM
+- a message queue technology without headers, such as Kinesis, or
+- Lambdas
 
 ### Manual instrumentation installation
 
@@ -24,19 +29,20 @@ kinesis, kafka, rabbitmq, sqs, sns
 {{< /code-block >}}
 
 3. Call the Data Streams Monitoring checkpoints when messages are produced and when they are consumed, as shown in the example code below:
-
-   {{< code-block lang="shell" >}}
+{{< tabs >}}
+{{% tab "Java" %}}
+{{< code-block lang="java" >}}
 import datadog.trace.api.experimental.*;
 ​​
 Carrier headersAdapter = new Carrier(headers);
 ​
-# Before calling database PUT
+// Before calling database PUT
 DataStreamsCheckpointer.get().setProduceCheckpoint("<database-type>", "<topic-name>", headersAdapter);
 ​
-# After calling database GET
+// After calling database GET
 DataStreamsCheckpointer.get().setConsumeCheckpoint("<database-type>", "<topic-name>", headersAdapter);
 
-# Replace Headers with whatever you're using to pass the context
+// Replace headers with whatever you're using to pass the context
 private class Carrier implements DataStreamsContextCarrier {
 	private Headers headers;
 
@@ -54,7 +60,43 @@ private class Carrier implements DataStreamsContextCarrier {
 	}
 }
 {{< /code-block >}}
+{{% /tab %}}
+{{% tab "Node.js" %}}
+{{< code-block lang="javascript" >}}
+const tracer = require('dd-trace').init({})
+
+// before calling produce
+const headers = {}
+tracer.dataStreamsCheckpointer.setProduceCheckpoint(
+"<datastream-type>", "<queue-name>", headers
+)
+
+// after calling consume
+tracer.dataStreamsCheckpointer.setConsumeCheckpoint(
+"<datastream-type>", "<queue-name>", headers
+)
+
+{{< /code-block >}}
+{{% /tab %}}
+{{% tab "Python" %}}
+{{< code-block lang="python" >}}
+from ddtrace.data_streams import set_consume_checkpoint
+from ddtrace.data_streams import set_produce_checkpoint
+
+# before calling produce
+headers = {}
+set_produce_checkpoint(
+"<datastream-type>", "<datastream-name>", headers.setdefault
+)
 
+# after calling consume
+set_consume_checkpoint(
+"<datastream-type>", "<datastream-name>", headers.get
+)
+
+{{< /code-block >}}
+{{% /tab %}}
+{{< /tabs >}}
 ## Further Reading
 
 {{< partial name="whats-next/whats-next.html" >}}