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Merge branch 'main' into PR #4026 to update
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‎CHANGELOG.md‎

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# Changelog
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## [6.109.0](https://github.com/googleapis/java-spanner/compare/v6.108.0...v6.109.0) (2026-02-02)
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### Features
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* Adding Send and Ack Mutation Support for Cloud Spanner Queue ([#4298](https://github.com/googleapis/java-spanner/issues/4298)) ([4b637ac](https://github.com/googleapis/java-spanner/commit/4b637ac0e4d6d696f3da8ae7fbac31c877aceba9))
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### Documentation
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* Add snippet for ReadLockMode configuration at client and transaction ([#4305](https://github.com/googleapis/java-spanner/issues/4305)) ([0fd4098](https://github.com/googleapis/java-spanner/commit/0fd40983b3bbb2f753e07036cedea9e7b9e26132))
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## [6.108.0](https://github.com/googleapis/java-spanner/compare/v6.107.0...v6.108.0) (2026-01-28)
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‎README.md‎

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If you are using Gradle without BOM, add this to your dependencies:
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```Groovy
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implementation 'com.google.cloud:google-cloud-spanner:6.108.0'
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implementation 'com.google.cloud:google-cloud-spanner:6.109.0'
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```
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If you are using SBT, add this to your dependencies:
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```Scala
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libraryDependencies += "com.google.cloud" % "google-cloud-spanner" % "6.108.0"
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libraryDependencies += "com.google.cloud" % "google-cloud-spanner" % "6.109.0"
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```
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## Authentication
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| Get Database Ddl Sample | [source code](https://github.com/googleapis/java-spanner/blob/main/samples/snippets/src/main/java/com/example/spanner/GetDatabaseDdlSample.java) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/java-spanner&page=editor&open_in_editor=samples/snippets/src/main/java/com/example/spanner/GetDatabaseDdlSample.java) |
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| Get Instance Config Sample | [source code](https://github.com/googleapis/java-spanner/blob/main/samples/snippets/src/main/java/com/example/spanner/GetInstanceConfigSample.java) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/java-spanner&page=editor&open_in_editor=samples/snippets/src/main/java/com/example/spanner/GetInstanceConfigSample.java) |
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| Insert Using Dml Returning Sample | [source code](https://github.com/googleapis/java-spanner/blob/main/samples/snippets/src/main/java/com/example/spanner/InsertUsingDmlReturningSample.java) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/java-spanner&page=editor&open_in_editor=samples/snippets/src/main/java/com/example/spanner/InsertUsingDmlReturningSample.java) |
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| Isolation Level And Read Lock Mode Sample | [source code](https://github.com/googleapis/java-spanner/blob/main/samples/snippets/src/main/java/com/example/spanner/IsolationLevelAndReadLockModeSample.java) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/java-spanner&page=editor&open_in_editor=samples/snippets/src/main/java/com/example/spanner/IsolationLevelAndReadLockModeSample.java) |
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| Last Statement Sample | [source code](https://github.com/googleapis/java-spanner/blob/main/samples/snippets/src/main/java/com/example/spanner/LastStatementSample.java) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/java-spanner&page=editor&open_in_editor=samples/snippets/src/main/java/com/example/spanner/LastStatementSample.java) |
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| List Backup Schedules Sample | [source code](https://github.com/googleapis/java-spanner/blob/main/samples/snippets/src/main/java/com/example/spanner/ListBackupSchedulesSample.java) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/java-spanner&page=editor&open_in_editor=samples/snippets/src/main/java/com/example/spanner/ListBackupSchedulesSample.java) |
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| List Database Roles | [source code](https://github.com/googleapis/java-spanner/blob/main/samples/snippets/src/main/java/com/example/spanner/ListDatabaseRoles.java) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/java-spanner&page=editor&open_in_editor=samples/snippets/src/main/java/com/example/spanner/ListDatabaseRoles.java) |
@@ -548,7 +549,7 @@ Java is a registered trademark of Oracle and/or its affiliates.
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[javadocs]: https://cloud.google.com/java/docs/reference/google-cloud-spanner/latest/history
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[stability-image]: https://img.shields.io/badge/stability-stable-green
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[maven-version-image]: https://img.shields.io/maven-central/v/com.google.cloud/google-cloud-spanner.svg
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[maven-version-link]: https://central.sonatype.com/artifact/com.google.cloud/google-cloud-spanner/6.108.0
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[maven-version-link]: https://central.sonatype.com/artifact/com.google.cloud/google-cloud-spanner/6.109.0
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[authentication]: https://github.com/googleapis/google-cloud-java#authentication
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[auth-scopes]: https://developers.google.com/identity/protocols/oauth2/scopes
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[predefined-iam-roles]: https://cloud.google.com/iam/docs/understanding-roles#predefined_roles

‎benchmarks/pom.xml‎

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<parent>
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<groupId>com.google.cloud</groupId>
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<artifactId>google-cloud-spanner-parent</artifactId>
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<version>6.108.0</version><!-- {x-version-update:google-cloud-spanner:current} -->
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<version>6.109.0</version><!-- {x-version-update:google-cloud-spanner:current} -->
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</parent>
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<properties>

‎google-cloud-spanner-bom/pom.xml‎

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<modelVersion>4.0.0</modelVersion>
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<groupId>com.google.cloud</groupId>
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<artifactId>google-cloud-spanner-bom</artifactId>
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<version>6.108.0</version><!-- {x-version-update:google-cloud-spanner:current} -->
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<version>6.109.0</version><!-- {x-version-update:google-cloud-spanner:current} -->
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<packaging>pom</packaging>
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<parent>
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<groupId>com.google.cloud</groupId>
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<dependency>
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<groupId>com.google.cloud</groupId>
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<artifactId>google-cloud-spanner</artifactId>
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<version>6.108.0</version><!-- {x-version-update:google-cloud-spanner:current} -->
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<version>6.109.0</version><!-- {x-version-update:google-cloud-spanner:current} -->
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</dependency>
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<dependency>
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<groupId>com.google.cloud</groupId>
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<artifactId>google-cloud-spanner</artifactId>
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<type>test-jar</type>
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<version>6.108.0</version><!-- {x-version-update:google-cloud-spanner:current} -->
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<version>6.109.0</version><!-- {x-version-update:google-cloud-spanner:current} -->
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</dependency>
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<dependency>
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<groupId>com.google.api.grpc</groupId>
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<artifactId>grpc-google-cloud-spanner-v1</artifactId>
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<version>6.108.0</version><!-- {x-version-update:grpc-google-cloud-spanner-v1:current} -->
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<version>6.109.0</version><!-- {x-version-update:grpc-google-cloud-spanner-v1:current} -->
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</dependency>
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<dependency>
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<groupId>com.google.api.grpc</groupId>
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<artifactId>grpc-google-cloud-spanner-admin-instance-v1</artifactId>
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<version>6.108.0</version><!-- {x-version-update:grpc-google-cloud-spanner-admin-instance-v1:current} -->
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<version>6.109.0</version><!-- {x-version-update:grpc-google-cloud-spanner-admin-instance-v1:current} -->
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</dependency>
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<dependency>
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<groupId>com.google.api.grpc</groupId>
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<artifactId>grpc-google-cloud-spanner-admin-database-v1</artifactId>
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<version>6.108.0</version><!-- {x-version-update:grpc-google-cloud-spanner-admin-database-v1:current} -->
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<version>6.109.0</version><!-- {x-version-update:grpc-google-cloud-spanner-admin-database-v1:current} -->
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</dependency>
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<dependency>
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<groupId>com.google.api.grpc</groupId>
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<artifactId>proto-google-cloud-spanner-admin-instance-v1</artifactId>
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<version>6.108.0</version><!-- {x-version-update:proto-google-cloud-spanner-admin-instance-v1:current} -->
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<version>6.109.0</version><!-- {x-version-update:proto-google-cloud-spanner-admin-instance-v1:current} -->
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</dependency>
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<dependency>
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<groupId>com.google.api.grpc</groupId>
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<artifactId>proto-google-cloud-spanner-v1</artifactId>
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<version>6.108.0</version><!-- {x-version-update:proto-google-cloud-spanner-v1:current} -->
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<version>6.109.0</version><!-- {x-version-update:proto-google-cloud-spanner-v1:current} -->
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</dependency>
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<dependency>
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<groupId>com.google.api.grpc</groupId>
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<artifactId>proto-google-cloud-spanner-admin-database-v1</artifactId>
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<version>6.108.0</version><!-- {x-version-update:proto-google-cloud-spanner-admin-database-v1:current} -->
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<version>6.109.0</version><!-- {x-version-update:proto-google-cloud-spanner-admin-database-v1:current} -->
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</dependency>
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</dependencies>
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</dependencyManagement>

‎google-cloud-spanner-executor/pom.xml‎

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<modelVersion>4.0.0</modelVersion>
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<groupId>com.google.cloud</groupId>
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<artifactId>google-cloud-spanner-executor</artifactId>
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<version>6.108.0</version><!-- {x-version-update:google-cloud-spanner-executor:current} -->
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<version>6.109.0</version><!-- {x-version-update:google-cloud-spanner-executor:current} -->
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<packaging>jar</packaging>
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<name>Google Cloud Spanner Executor</name>
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<parent>
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<groupId>com.google.cloud</groupId>
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<artifactId>google-cloud-spanner-parent</artifactId>
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<version>6.108.0</version><!-- {x-version-update:google-cloud-spanner:current} -->
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<version>6.109.0</version><!-- {x-version-update:google-cloud-spanner:current} -->
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<properties>

‎google-cloud-spanner/pom.xml‎

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<modelVersion>4.0.0</modelVersion>
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<groupId>com.google.cloud</groupId>
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<artifactId>google-cloud-spanner</artifactId>
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<version>6.108.0</version><!-- {x-version-update:google-cloud-spanner:current} -->
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<version>6.109.0</version><!-- {x-version-update:google-cloud-spanner:current} -->
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<packaging>jar</packaging>
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<name>Google Cloud Spanner</name>
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<url>https://github.com/googleapis/java-spanner</url>
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<description>Java idiomatic client for Google Cloud Spanner.</description>
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<parent>
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<groupId>com.google.cloud</groupId>
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<artifactId>google-cloud-spanner-parent</artifactId>
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<version>6.109.0</version><!-- {x-version-update:google-cloud-spanner:current} -->
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<site.installationModule>google-cloud-spanner</site.installationModule>

‎google-cloud-spanner/src/test/java/com/google/cloud/spanner/it/ITTransactionTest.java‎

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import com.google.cloud.spanner.ReadContext;
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import com.google.cloud.spanner.ReadOnlyTransaction;
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import com.google.cloud.spanner.ResultSet;
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import com.google.cloud.spanner.Spanner;
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import com.google.cloud.spanner.SpannerException;
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import com.google.cloud.spanner.SpannerOptions;
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import com.google.cloud.spanner.SpannerOptions.Builder.DefaultReadWriteTransactionOptions;
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import com.google.cloud.spanner.Statement;
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import com.google.cloud.spanner.Struct;
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import com.google.cloud.spanner.TimestampBound;
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import com.google.common.collect.Sets;
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import com.google.common.util.concurrent.SettableFuture;
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import com.google.common.util.concurrent.Uninterruptibles;
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import com.google.spanner.v1.TransactionOptions.IsolationLevel;
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import com.google.spanner.v1.TransactionOptions.ReadWrite.ReadLockMode;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Collections;
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@Test
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public void isolationLevelAndReadLockModeSetAtClientLevelTest() {
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SpannerOptions options =
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env.getTestHelper().getOptions().toBuilder()
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.setDefaultTransactionOptions(
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DefaultReadWriteTransactionOptions.newBuilder()
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.setIsolationLevel(IsolationLevel.REPEATABLE_READ)
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.setReadLockMode(ReadLockMode.OPTIMISTIC)
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.build())
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.build();
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try (Spanner spanner = options.getService()) {
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DatabaseClient client = spanner.getDatabaseClient(db.getId());
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Long updatedRows =
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client
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.readWriteTransaction()
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.run(
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transaction ->
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transaction.executeUpdate(
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Statement.of("INSERT INTO T (K, V) VALUES ('test1', 2)")));
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assertThat(updatedRows).isEqualTo(1L);
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}
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}
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@Test
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public void isolationLevelAndReadLockModeSetAtClientAndTxnLevelTest() {
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SpannerOptions options =
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env.getTestHelper().getOptions().toBuilder()
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.setDefaultTransactionOptions(
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DefaultReadWriteTransactionOptions.newBuilder()
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.setIsolationLevel(IsolationLevel.REPEATABLE_READ)
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.setReadLockMode(ReadLockMode.OPTIMISTIC)
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.build())
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.build();
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try (Spanner spanner = options.getService()) {
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DatabaseClient client = spanner.getDatabaseClient(db.getId());
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Long updatedRows =
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client
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.readWriteTransaction(
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Options.isolationLevel(IsolationLevel.SERIALIZABLE),
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Options.readLockMode(ReadLockMode.PESSIMISTIC))
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.run(
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transaction ->
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transaction.executeUpdate(
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Statement.of("INSERT INTO T (K, V) VALUES ('test1', 2)")));
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assertThat(updatedRows).isEqualTo(1L);
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}
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}
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@Test
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public void userExceptionPreventsCommit() {
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class UserException extends Exception {

‎grpc-google-cloud-spanner-admin-database-v1/pom.xml‎

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<modelVersion>4.0.0</modelVersion>
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<groupId>com.google.api.grpc</groupId>
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<artifactId>grpc-google-cloud-spanner-admin-database-v1</artifactId>
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<version>6.108.0</version><!-- {x-version-update:grpc-google-cloud-spanner-admin-database-v1:current} -->
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<version>6.109.0</version><!-- {x-version-update:grpc-google-cloud-spanner-admin-database-v1:current} -->
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<name>grpc-google-cloud-spanner-admin-database-v1</name>
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<description>GRPC library for grpc-google-cloud-spanner-admin-database-v1</description>
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<parent>
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<groupId>com.google.cloud</groupId>
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<artifactId>google-cloud-spanner-parent</artifactId>
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<version>6.108.0</version><!-- {x-version-update:google-cloud-spanner:current} -->
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<version>6.109.0</version><!-- {x-version-update:google-cloud-spanner:current} -->
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<dependency>

‎grpc-google-cloud-spanner-admin-instance-v1/pom.xml‎

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<modelVersion>4.0.0</modelVersion>
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<groupId>com.google.api.grpc</groupId>
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<artifactId>grpc-google-cloud-spanner-admin-instance-v1</artifactId>
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<version>6.108.0</version><!-- {x-version-update:grpc-google-cloud-spanner-admin-instance-v1:current} -->
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<version>6.109.0</version><!-- {x-version-update:grpc-google-cloud-spanner-admin-instance-v1:current} -->
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<name>grpc-google-cloud-spanner-admin-instance-v1</name>
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<description>GRPC library for grpc-google-cloud-spanner-admin-instance-v1</description>
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<parent>
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<groupId>com.google.cloud</groupId>
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<artifactId>google-cloud-spanner-parent</artifactId>
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<version>6.108.0</version><!-- {x-version-update:google-cloud-spanner:current} -->
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<version>6.109.0</version><!-- {x-version-update:google-cloud-spanner:current} -->
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<dependencies>
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‎grpc-google-cloud-spanner-executor-v1/pom.xml‎

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<modelVersion>4.0.0</modelVersion>
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<groupId>com.google.api.grpc</groupId>
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<artifactId>grpc-google-cloud-spanner-executor-v1</artifactId>
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<version>6.108.0</version><!-- {x-version-update:grpc-google-cloud-spanner-executor-v1:current} -->
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<version>6.109.0</version><!-- {x-version-update:grpc-google-cloud-spanner-executor-v1:current} -->
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<name>grpc-google-cloud-spanner-executor-v1</name>
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<description>GRPC library for google-cloud-spanner</description>
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<parent>
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<groupId>com.google.cloud</groupId>
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<artifactId>google-cloud-spanner-parent</artifactId>
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<version>6.108.0</version><!-- {x-version-update:google-cloud-spanner:current} -->
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<version>6.109.0</version><!-- {x-version-update:google-cloud-spanner:current} -->
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</parent>
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<dependencies>
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<dependency>

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