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Docsp 9930 legacy api (#91)
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‎source/faq.txt

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If you are unable to find the answer to your question here, try our forums and
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support channels listed in the :doc:`Issues and Help <issues-and-help>`
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section.
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Legacy API
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----------
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.. _faq-legacy-connection:
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How do I connect to my MongoDB instance with the legacy API?
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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The following example shows how to connect to a MongoDB instance with the
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legacy API and the current API.
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Imagine we are connecting to a collection that contains only this document:
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.. code-block:: json
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:copyable: false
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{"_id": 1, "val": 1}
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.. tabs::
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.. tab:: Legacy API
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:tabid: legacy
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.. literalinclude:: /includes/fundamentals/code-snippets/LegacyAPI.java
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:language: java
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:dedent:
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:start-after: start legacy-api-example
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:end-before: end legacy-api-example
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.. tab:: Current API
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:tabid: current
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.. literalinclude:: /includes/fundamentals/code-snippets/CurrentAPI.java
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:language: java
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:dedent:
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:start-after: start current-api-example
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:end-before: end current-api-example
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The output of the above code snippet should look like this:
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.. code-block:: json
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:copyable: false
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{"_id": 1, "val": 1}
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For more information on the legacy classes and methods used in the above example,
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see the following API documentation pages:
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- :java-docs:`Legacy API Javadoc Site <apidocs/mongodb-driver-legacy/index.html>`
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- :java-docs:`MongoClient <apidocs/mongodb-driver-legacy/com/mongodb/MongoClient.html>`
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- :java-docs:`DB <apidocs/mongodb-driver-legacy/com/mongodb/DB.html>`
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- :java-docs:`DBCollection <apidocs/mongodb-driver-legacy/com/mongodb/DBCollection.html>`
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- :java-docs:`DBObject <apidocs/mongodb-driver-core/com/mongodb/DBObject.html>`
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- :java-docs:`getDB() <apidocs/mongodb-driver-legacy/com/mongodb/MongoClient.html#getDB(java.lang.String)>`
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- :java-docs:`getCollection() <apidocs/mongodb-driver-legacy/com/mongodb/DB.html#getCollection(java.lang.String)>`
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- :java-docs:`find() <apidocs/mongodb-driver-legacy/com/mongodb/DBCollection.html#find()>`
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- :java-docs:`one() <apidocs/mongodb-driver-legacy/com/mongodb/DBCursor.html#one()>`
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How do I use the legacy ``MongoClientOptions`` and ``MongoClientURI`` Classes?
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Here is an example showing how to use the legacy ``MongoClientOptions`` and
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``MongoClientURI`` classes to set your write concern:
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.. tabs::
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.. tab:: Legacy API
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:tabid: legacy
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.. literalinclude:: /includes/fundamentals/code-snippets/LegacyAPI.java
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:language: java
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:dedent:
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:start-after: start legacy-api-mongoclientoptions-example
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:end-before: end legacy-api-mongoclientoptions-example
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.. tab:: Current API
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:tabid: current
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.. literalinclude:: /includes/fundamentals/code-snippets/CurrentAPI.java
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:language: java
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:dedent:
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:start-after: start current-api-mongoclientsettings-example
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:end-before: end current-api-mongoclientsettings-example
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For more information on the legacy classes and methods used in the above example,
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see the following API documentation pages:
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- :java-docs:`Legacy API Javadoc Site <apidocs/mongodb-driver-legacy/index.html>`
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- :java-docs:`MongoClient <apidocs/mongodb-driver-legacy/com/mongodb/MongoClient.html>`
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- :java-docs:`MongoClientOptions <apidocs/mongodb-driver-legacy/com/mongodb/MongoClientOptions.html>`
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- :java-docs:`MongoClientURI <apidocs/mongodb-driver-legacy/com/mongodb/MongoClientURI.html>`

‎source/includes/fundamentals/code-snippets/CurrentAPI.java

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package com.mycompany.app;
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import com.mongodb.*;
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import com.mongodb.client.MongoClient;
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import com.mongodb.client.MongoClients;
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import com.mongodb.client.MongoCollection;
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import com.mongodb.client.MongoDatabase;
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import org.bson.Document;
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import org.bson.conversions.Bson;
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import java.net.URL;
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public class CurrentAPI {
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private static final String COLLECTION = "test";
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private static final String DATABASE = "test";
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private static String URI = System.getenv("DRIVER_URL");
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public static void main(String[] args) throws InterruptedException {
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CurrentAPI c = new CurrentAPI();
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c.example1();
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c.example2();
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}
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private void example1() {
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// start current-api-example
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MongoClient client = MongoClients.create(URI);
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MongoDatabase db = client.getDatabase(DATABASE);
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MongoCollection<Document> col = db.getCollection(COLLECTION);
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Document doc = col.find().first();
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System.out.println(doc.toJson());
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// end current-api-example
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client.close();
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}
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private void example2() {
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// start current-api-mongoclientsettings-example
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MongoClientSettings options = MongoClientSettings.builder()
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.applyConnectionString(new ConnectionString(URI))
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.writeConcern(WriteConcern.W1).build();
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MongoClient client = MongoClients.create(options);
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// end current-api-mongoclientsettings-example
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client.close();
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}
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}

‎source/includes/fundamentals/code-snippets/LegacyAPI.java

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package com.mycompany.app;
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import com.mongodb.*;
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public class LegacyAPI {
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private static final String COLLECTION = "test";
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private static final String DATABASE = "test";
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private static final String URI = System.getenv("DRIVER_URL");
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public static void main(String[] args) {
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LegacyAPI l = new LegacyAPI();
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l.example1();
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l.example2();
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}
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private void example1() {
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// start legacy-api-example
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MongoClient client = new MongoClient(URI);
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DB db = client.getDB(DATABASE);
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DBCollection col = db.getCollection(COLLECTION);
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DBObject doc = col.find().one();
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System.out.println(doc.toString());
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// end legacy-api-example
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client.close();
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}
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private void example2() {
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// start legacy-api-mongoclientoptions-example
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MongoClientURI mongoURI = new MongoClientURI(URI,
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MongoClientOptions.builder()
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.writeConcern(WriteConcern.W1));
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MongoClient client = new MongoClient(mongoURI);
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// end legacy-api-mongoclientoptions-example
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client.close();
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}
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}

‎source/includes/legacy-redirect.rst

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.. note:: Legacy API
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If you are using the legacy API,
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:ref:`see our FAQ page <faq-legacy-connection>`
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to learn what changes you need to make to this code example.

‎source/usage-examples/bulkWrite.txt

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updated: 2
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deleted: 1
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.. include:: /includes/legacy-redirect.rst
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For additional information on the classes and methods mentioned on this
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page, see the following API documentation:
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‎source/usage-examples/command.txt

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dbStats: {"db": "sample_mflix", "collections": 5, "views": 0, "objects": 75595, "avgObjSize": 692.1003770090614, "dataSize": 52319328, "storageSize": 29831168, "numExtents": 0, "indexes": 9, "indexSize": 14430208, "fileSize": 0, "nsSizeMB": 0, "ok": 1}
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.. include:: /includes/legacy-redirect.rst
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For additional information on the classes and methods mentioned on this
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page, see the following API documentation:
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‎source/usage-examples/count.txt

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Estimated number of documents in the movies collection: 23541
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Number of movies from Spain: 755
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.. include:: /includes/legacy-redirect.rst
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For additional information on the classes and methods mentioned on this
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page, see the following API documentation:
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‎source/usage-examples/deleteMany.txt

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.. literalinclude:: /includes/usage-examples/code-snippets/DeleteMany.java
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:language: java
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.. note::
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If you are using the **legacy API**, see the :doc:`faq </faq>` to determine
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what changes you need to make to this code example.
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When you run the example, you should see output that reports the number of
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documents deleted in your call to ``deleteMany()``.
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.. code-block:: none
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Deleted document count: 4
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.. include:: /includes/legacy-redirect.rst
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For additional information on the classes and methods mentioned on this
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page, see the following API documentation:
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‎source/usage-examples/deleteOne.txt

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.. literalinclude:: /includes/usage-examples/code-snippets/DeleteOne.java
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:language: java
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.. note::
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If you are using the **legacy API**, see the :doc:`FAQ </faq>` to determine
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what changes you need to make to this code example.
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``deleteOne()`` matches a document and removes it, you should see output
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Deleted document count: 0
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.. include:: /includes/legacy-redirect.rst
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For additional information on the classes and methods mentioned on this
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page, see the following API documentation:
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‎source/usage-examples/distinct.txt

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.. literalinclude:: /includes/usage-examples/code-snippets/Distinct.java
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:language: java
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what changes you need to make to this code example.
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When you run the example, you should see output that reports each distinct
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year for all the movies that Carl Franklin was included as a director,
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which should look something like this:
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.. include:: /includes/legacy-redirect.rst
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For additional information on the classes and methods mentioned on this
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page, see the following API documentation:
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