samples: Modifying BatchSample to add snippet with databoost (#2463)

* samples: Modifying existing samples with data boost

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README.md

@@ -57,13 +57,13 @@ implementation 'com.google.cloud:google-cloud-spanner'
 If you are using Gradle without BOM, add this to your dependencies:
 
 ```Groovy
-implementation 'com.google.cloud:google-cloud-spanner:6.42.0'
+implementation 'com.google.cloud:google-cloud-spanner:6.42.1'
 ```
 
 If you are using SBT, add this to your dependencies:
 
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-spanner" % "6.42.0"
+libraryDependencies += "com.google.cloud" % "google-cloud-spanner" % "6.42.1"
 ```
 <!-- {x-version-update-end} -->
 
@@ -412,7 +412,7 @@ Java is a registered trademark of Oracle and/or its affiliates.
 [kokoro-badge-link-5]: http://storage.googleapis.com/cloud-devrel-public/java/badges/java-spanner/java11.html
 [stability-image]: https://img.shields.io/badge/stability-stable-green
 [maven-version-image]: https://img.shields.io/maven-central/v/com.google.cloud/google-cloud-spanner.svg
-[maven-version-link]: https://central.sonatype.com/artifact/com.google.cloud/google-cloud-spanner/6.42.0
+[maven-version-link]: https://central.sonatype.com/artifact/com.google.cloud/google-cloud-spanner/6.42.1
 [authentication]: https://github.com/googleapis/google-cloud-java#authentication
 [auth-scopes]: https://developers.google.com/identity/protocols/oauth2/scopes
 [predefined-iam-roles]: https://cloud.google.com/iam/docs/understanding-roles#predefined_roles

samples/snippets/src/main/java/com/example/spanner/BatchSample.java

@@ -19,6 +19,7 @@
 import com.google.cloud.spanner.BatchClient;
 import com.google.cloud.spanner.BatchReadOnlyTransaction;
 import com.google.cloud.spanner.DatabaseId;
+import com.google.cloud.spanner.Options;
 import com.google.cloud.spanner.Partition;
 import com.google.cloud.spanner.PartitionOptions;
 import com.google.cloud.spanner.ResultSet;
@@ -76,10 +77,15 @@ public static void main(String[] args) throws InterruptedException {
           batchClient.batchReadOnlyTransaction(TimestampBound.strong());
 
       // A Partition object is serializable and can be used from a different process.
+      // DataBoost option is an optional parameter which can be used for partition read
+      // and query to execute the request via spanner independent compute resources.
+
       List<Partition> partitions =
           txn.partitionQuery(
               PartitionOptions.getDefaultInstance(),
-              Statement.of("SELECT SingerId, FirstName, LastName FROM Singers"));
+              Statement.of("SELECT SingerId, FirstName, LastName FROM Singers"),
+              // Option to enable data boost for a given request
+              Options.dataBoostEnabled(true));
 
       totalPartitions = partitions.size();