feat: Allow JDBC connection to configure direct access (#2116)

* feat: Allow JDBC connection to configiue direct access

* test: update SQL script tests to allow zero for timeouts

---------

Co-authored-by: Knut Olav Løite <koloite@gmail.com>

Author: sakthivelmanii

README.md

@@ -137,6 +137,7 @@ supported connection properties.
   into one batch.
 - oauthToken (string): A valid pre-existing OAuth token to use for authentication for this connection. Setting this property will take precedence over any value set for a credentials file.
 - lenient (boolean): Enable this to force the JDBC driver to ignore unknown properties in the connection URL. Some applications automatically add additional properties to the URL that are not recognized by the JDBC driver. Normally, the JDBC driver will reject this, unless `lenient` mode is enabled.
+- enableDirectAccess (boolean): Sets whether the JDBC connection should establish connection using Directpath. Setting this property will enable client to establish connection directly to Spanner if client is running in GCP VM, Otherwise it will fall back standard network path. 
 
 For a full list of supported connection properties, see
 [Supported Connection Properties](documentation/connection_properties.md).

documentation/connection_properties.md

@@ -28,6 +28,7 @@ The 'Context' value indicates whether the property can only be set when a connec
 | dialect | Sets the dialect to use for new databases that are created by this connection. | GOOGLE_STANDARD_SQL | GOOGLE_STANDARD_SQL, POSTGRESQL | STARTUP |
 | directed_read | The directed read options to apply to read-only transactions. |  |  | USER |
 | enableapitracing | Add OpenTelemetry traces for each individual RPC call. Enable this to get a detailed view of each RPC that is being executed by your application, or if you want to debug potential latency problems caused by RPCs that are being retried. |  | true, false | STARTUP |
+| enabledirectaccess | Configure the connection to try to connect to Spanner using DirectPath (true/false). The client will try to connect to Spanner using a direct Google network connection. DirectPath will work only if the client is trying to establish a connection from a Google Cloud VM. Otherwise it will automatically fallback to the standard network path. NOTE: The default for this property is currently false, but this could be changed in the future. |  | true, false | STARTUP |
 | enableendtoendtracing | Enable end-to-end tracing (true/false) to generate traces for both the time that is spent in the client, as well as time that is spent in the Spanner server. Server side traces can only go to Google Cloud Trace, so to see end to end traces, the application should configure an exporter that exports the traces to Google Cloud Trace. | false | true, false | STARTUP |
 | enableextendedtracing | Include the SQL string in the OpenTelemetry traces that are generated by this connection. The SQL string is added as the standard OpenTelemetry attribute 'db.statement'. |  | true, false | STARTUP |
 | encodedcredentials | Base64-encoded credentials to use for this connection. If neither this property or a credentials location are set, the connection will use the default Google Cloud credentials for the runtime environment. |  |  | STARTUP |

pom.xml

@@ -61,7 +61,7 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-spanner-bom</artifactId>
-        <version>6.95.1</version>
+        <version>6.96.0</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>