DOCSP-39732 Run a command standardization (#77)

source/includes/write/run-command.java

@@ -0,0 +1,5 @@
+Document command = new Document("ping", 1);
+
+Publisher<Document> commandPublisher = database.runCommand(command);
+Document result = Mono.from(commandPublisher).block();
+System.out.println(result);

source/write-data-to-mongo.txt

@@ -29,7 +29,7 @@ Write Data to MongoDB
     /write/bulk-writes
     /write/store-large-docs
     /write/write-concern
-    /write/command
+    /write/run-command
 
 Overview
 --------

source/write/run-command.txt

@@ -0,0 +1,70 @@
+.. _java-rs-run-command:
+
+======================
+Run a Database Command
+======================
+
+.. contents:: On this page
+   :local:
+   :backlinks: none
+   :depth: 2
+   :class: singlecol
+
+.. facet::
+   :name: genre
+   :values: reference
+
+.. meta::
+   :keywords: database operation, code example
+
+Overview
+--------
+
+In this guide, you can learn how to run a database command with the
+{+driver-short+}. You can use database commands to perform a variety of administrative and
+diagnostic tasks, such as fetching server statistics, initializing a replica
+set, or running an aggregation pipeline.
+
+.. tip:: Prefer Driver Methods Over Database Commands
+
+   The driver provides methods for many database commands. We recommend
+   using driver methods instead of executing database commands when possible. 
+
+   To perform administrative tasks, use the :mdb-shell:`MongoDB Shell </>` instead of the
+   {+driver-short+}. Calling the MongoDB Shell :manual:`db.runCommand()
+   </reference/method/db.runCommand/>` method is the preferred method to issue
+   database commands, as it provides a consistent interface between the shell
+   and drivers.
+
+.. include:: includes/reactor-note.rst
+
+Run a Command
+-------------
+
+To run a database command, specify the command in a document, and pass the
+document to the ``runCommand()`` method. The following code calls the
+``runCommand()`` method on a database to run the ``ping`` command, which is a
+no-op command used to test if a server is responsive.
+
+.. io-code-block::
+
+   .. input:: /includes/write/run-command.java
+      :language: java
+      :emphasize-lines: 1, 3
+
+   .. output::
+      :visible: false
+
+      Document{{ok=1}}
+
+Additional Information
+----------------------
+
+To see a full list of database commands and their available parameters, see :manual:`Database
+Commands </reference/command>` in the {+mdb-server+} manual.
+
+API Documentation
+~~~~~~~~~~~~~~~~~
+
+To learn more about the ``runCommand()`` method, see the
+`runCommand() API documentation <{+api+}/mongodb-driver-reactivestreams/com/mongodb/reactivestreams/client/MongoDatabase.html#runCommand(org.bson.conversions.Bson)>`__.