doc: modify installation instructions for gapic public preview (#1833)

* doc: modify installation instructions for gapic public preview

* chore: generate libraries at Tue Apr 29 20:05:06 UTC 2025

---------

Co-authored-by: cloud-java-bot <[email protected]>

Author: cindy-peng

.readme-partials.yaml

@@ -108,35 +108,10 @@ custom_content: |
   
   gRPC Java Datastore Client User Guide
   -------
-  In this feature launch, the [Java Datastore client](https://github.com/googleapis/java-datastore) now offers gRPC as a transport layer option with experimental support. Using [gRPC connection pooling](https://grpc.io/docs/guides/performance/) enables distributing RPCs over multiple connections which may improve performance.
+  The [Java Datastore client](https://github.com/googleapis/java-datastore) now offers gRPC as a transport layer option with experimental support. Using [gRPC connection pooling](https://grpc.io/docs/guides/performance/) enables distributing RPCs over multiple connections which may improve performance.
   
   #### Installation Instructions
-  The client can be built from the `grpc-experimental` branch on GitHub. For private preview, you can also download the artifact with the instructions provided below.
-
-  1. Download the datastore private preview package with dependencies:
-    ```
-    curl -o <path-to-downloaded-jar>  https://datastore-sdk-feature-release.web.app/google-cloud-datastore-2.20.0-grpc-experimental-1-SNAPSHOT-jar-with-dependencies.jar
-    ```
-  2. Run the following commands to install JDK locally:
-    ```
-    mvn install:install-file -Dfile=<path-to-downloaded-jar> -DgroupId=com.google.cloud -DartifactId=google-cloud-datastore -Dversion=2.20.0-grpc
-    ```
-  3. Edit your pom.xml to add above package to `<dependencies/>` section:
-    ```xml
-    <dependency>
-    <groupId>com.google.cloud</groupId>
-    <artifactId>google-cloud-datastore</artifactId>
-    <version>2.20.0-grpc-experimental-1-SNAPSHOT</version>
-    </dependency>
-    ```
-  
-  And if you have not yet, add below to `<repositories/>` section:
-    ```xml
-    <repository>
-    <id>local-repo</id>
-    <url>file://${user.home}/.m2/repository</url>
-    </repository>
-    ```
+  To use this feature, please upgrade your Java-datastore SDK to version v2.28.0 or a newer release. You can find the latest versions [here](https://github.com/googleapis/java-datastore/releases).
   
   #### How to Use
   To opt-in to the gRPC transport behavior, simply add the below line of code (`setTransportOptions`) to your Datastore client instantiation.

README.md

@@ -206,35 +206,10 @@ display on your webpage.
 
 gRPC Java Datastore Client User Guide
 -------
-In this feature launch, the [Java Datastore client](https://github.com/googleapis/java-datastore) now offers gRPC as a transport layer option with experimental support. Using [gRPC connection pooling](https://grpc.io/docs/guides/performance/) enables distributing RPCs over multiple connections which may improve performance.
+The [Java Datastore client](https://github.com/googleapis/java-datastore) now offers gRPC as a transport layer option with experimental support. Using [gRPC connection pooling](https://grpc.io/docs/guides/performance/) enables distributing RPCs over multiple connections which may improve performance.
 
 #### Installation Instructions
-The client can be built from the `grpc-experimental` branch on GitHub. For private preview, you can also download the artifact with the instructions provided below.
-
-1. Download the datastore private preview package with dependencies:
-  ```
-  curl -o <path-to-downloaded-jar>  https://datastore-sdk-feature-release.web.app/google-cloud-datastore-2.20.0-grpc-experimental-1-SNAPSHOT-jar-with-dependencies.jar
-  ```
-2. Run the following commands to install JDK locally:
-  ```
-  mvn install:install-file -Dfile=<path-to-downloaded-jar> -DgroupId=com.google.cloud -DartifactId=google-cloud-datastore -Dversion=2.20.0-grpc
-  ```
-3. Edit your pom.xml to add above package to `<dependencies/>` section:
-  ```xml
-  <dependency>
-  <groupId>com.google.cloud</groupId>
-  <artifactId>google-cloud-datastore</artifactId>
-  <version>2.20.0-grpc-experimental-1-SNAPSHOT</version>
-  </dependency>
-  ```
-
-And if you have not yet, add below to `<repositories/>` section:
-  ```xml
-  <repository>
-  <id>local-repo</id>
-  <url>file://${user.home}/.m2/repository</url>
-  </repository>
-  ```
+To use this feature, please upgrade your Java-datastore SDK to version v2.28.0 or a newer release. You can find the latest versions [here](https://github.com/googleapis/java-datastore/releases).
 
 #### How to Use
 To opt-in to the gRPC transport behavior, simply add the below line of code (`setTransportOptions`) to your Datastore client instantiation.