fix: review comments + dependencies

Author: olavloite

spanner/cloud-client/pom.xml

@@ -34,6 +34,7 @@ limitations under the License.
     <maven.compiler.source>1.8</maven.compiler.source>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <opencensus.version>0.26.0</opencensus.version>
+    <spanner.version>1.51.0</spanner.version>
   </properties>
 
   <!-- Include the BOM to ensure compatibility across multiple google-cloud-* libraries -->
@@ -42,7 +43,7 @@ limitations under the License.
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-bom</artifactId>
-        <version>0.84.0-alpha</version>
+        <version>0.122.4-alpha</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>
@@ -51,34 +52,26 @@ limitations under the License.
   <!-- End of BOM -->
   <dependencies>
     <dependency>
-      <!-- Version auto-managed by BOM -->
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-spanner</artifactId>
-      <exclusions>
-        <exclusion>
-          <groupId>com.google.guava</groupId>
-          <artifactId>guava-jdk5</artifactId>
-        </exclusion>
-        <exclusion>
-          <groupId>io.opencensus</groupId>
-          <artifactId>opencensus-api</artifactId>
-        </exclusion>
-        <exclusion>
-          <groupId>io.grpc</groupId>
-          <artifactId>grpc-netty-shaded</artifactId>
-        </exclusion>
-        <exclusion>
-          <groupId>io.grpc</groupId>
-          <artifactId>grpc-core</artifactId>
-        </exclusion>
-      </exclusions>
+      <version>${spanner.version}</version>
+    </dependency>
+    <dependency>
+      <groupId>com.google.api.grpc</groupId>
+      <artifactId>proto-google-cloud-spanner-admin-instance-v1</artifactId>
+      <version>${spanner.version}</version>
     </dependency>
-
     <dependency>
-      <groupId>com.google.guava</groupId>
-      <artifactId>guava</artifactId>
-      <version>28.2-jre</version>
+      <groupId>com.google.api.grpc</groupId>
+      <artifactId>proto-google-cloud-spanner-v1</artifactId>
+      <version>${spanner.version}</version>
     </dependency>
+    <dependency>
+      <groupId>com.google.api.grpc</groupId>
+      <artifactId>proto-google-cloud-spanner-admin-database-v1</artifactId>
+      <version>${spanner.version}</version>
+    </dependency>
+
     <dependency>
         <groupId>io.opencensus</groupId>
         <artifactId>opencensus-api</artifactId>

spanner/cloud-client/src/main/java/com/example/spanner/SpannerSample.java

@@ -1439,7 +1439,7 @@ static void clientWithQueryOptions(DatabaseId db) {
     SpannerOptions options =
         SpannerOptions.newBuilder()
             .setDefaultQueryOptions(
-                db, QueryOptions.newBuilder().setOptimizerVersion("latest").build())
+                db, QueryOptions.newBuilder().setOptimizerVersion("1").build())
             .build();
     Spanner spanner = options.getService();
     DatabaseClient dbClient = spanner.getDatabaseClient(db);
@@ -1463,7 +1463,7 @@ static void queryWithQueryOptions(DatabaseClient dbClient) {
             .executeQuery(
                 Statement
                     .newBuilder("SELECT SingerId, AlbumId, AlbumTitle FROM Albums")
-                    .withQueryOptions(QueryOptions.newBuilder().setOptimizerVersion("latest").build())
+                    .withQueryOptions(QueryOptions.newBuilder().setOptimizerVersion("1").build())
                     .build())) {
       while (resultSet.next()) {
         System.out.printf(