Integrare Spanner con Spring Data JPA (dialetto PostgreSQL)
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Spring Data JPA, che fa parte della più grande famiglia Spring Data, semplifica l'implementazione di repository basati su JPA. Spring Data JPA supporta PostgreSQL
e una vasta gamma di altri sistemi di database. Aggiunge un livello di astrazione tra
la tua applicazione e il tuo database che semplifica il porting
da un sistema di database a un altro.
Configurare Spring Data JPA per i database con dialetto PostgreSQL di Spanner
Puoi integrare i database con il dialetto PostgreSQL di Spanner con Spring Data JPA utilizzando il dialetto PostgreSQL Hibernate standard e PGAdapter.
Aggiungi il seguente metodo all'applicazione per avviare PGAdapter direttamente dall'applicazione Java. PGAdapter viene eseguito nella stessa JVM della tua applicazione, che si connette a PGAdapter su localhost:port.
/** Starts PGAdapter in-process and returns a reference to the server. */staticProxyServerstartPGAdapter(){// Start PGAdapter using the default credentials of the runtime environment on port 9432.OptionsMetadataoptions=OptionsMetadata.newBuilder().setPort(9432).build();ProxyServerserver=newProxyServer(options);server.startServer();server.awaitRunning();returnserver;}
Configurazione
Configura application.properties in modo che utilizzi il dialetto PostgreSQL Hibernate e il driver JDBC PostgreSQL. Configura il driver JDBC PostgreSQL per connetterti a un database in dialetto PostgreSQL tramite PGAdapter.
[[["Facile da capire","easyToUnderstand","thumb-up"],["Il problema è stato risolto","solvedMyProblem","thumb-up"],["Altra","otherUp","thumb-up"]],[["Difficile da capire","hardToUnderstand","thumb-down"],["Informazioni o codice di esempio errati","incorrectInformationOrSampleCode","thumb-down"],["Mancano le informazioni o gli esempi di cui ho bisogno","missingTheInformationSamplesINeed","thumb-down"],["Problema di traduzione","translationIssue","thumb-down"],["Altra","otherDown","thumb-down"]],["Ultimo aggiornamento 2025-09-05 UTC."],[],[],null,["# Integrate Spanner with Spring Data JPA (PostgreSQL dialect)\n\nSpring Data JPA, part of the larger Spring Data family, makes it easier to\nimplement JPA based repositories. Spring Data JPA supports PostgreSQL\nand a wide range of other database systems. It adds an abstraction layer between\nyour application and your database that makes your application easier to port\nfrom one database system to another.\n\nSet up Spring Data JPA for Spanner PostgreSQL-dialect databases\n---------------------------------------------------------------\n\nYou can integrate Spanner PostgreSQL-dialect databases with Spring Data JPA\nusing the standard PostgreSQL Hibernate dialect and\n[PGAdapter](/spanner/docs/pgadapter).\n\nTo see an example, refer to the full\n[working sample application](https://github.com/GoogleCloudPlatform/pgadapter/blob/-/samples/java/spring-data-jpa) on\nGitHub.\n\n### Dependencies\n\nIn your project, add Apache Maven dependencies for [Spring Data JPA](https://spring.io/projects/spring-data-jpa),\nthe [PostgreSQL JDBC driver](https://github.com/pgjdbc/pgjdbc), and [PGAdapter](/spanner/docs/pgadapter). \n\n \u003cdependencies\u003e\n \u003c!-- Spring Data JPA --\u003e\n \u003cdependency\u003e\n \u003cgroupId\u003eorg.springframework.boot\u003c/groupId\u003e\n \u003cartifactId\u003espring-boot-starter-data-jpa\u003c/artifactId\u003e\n \u003c/dependency\u003e\n \u003c!-- Add the PostgreSQL JDBC driver --\u003e\n \u003cdependency\u003e\n \u003cgroupId\u003eorg.postgresql\u003c/groupId\u003e\n \u003cartifactId\u003epostgresql\u003c/artifactId\u003e\n \u003c/dependency\u003e\n \u003c!-- Add PGAdapter as a dependency, so we can start it in-process --\u003e\n \u003cdependency\u003e\n \u003cgroupId\u003ecom.google.cloud\u003c/groupId\u003e\n \u003cartifactId\u003egoogle-cloud-spanner-pgadapter\u003c/artifactId\u003e\n \u003c/dependency\u003e\n \u003c/dependencies\u003e\n\n### Start PGAdapter in-process\n\nAdd the following method to your application to start PGAdapter\ndirectly from your Java application. PGAdapter runs in the same JVM as\nyour application, and the application connects to PGAdapter on\n`localhost:port`. \n\n /** Starts PGAdapter in-process and returns a reference to the server. */\n static ProxyServer startPGAdapter() {\n // Start PGAdapter using the default credentials of the runtime environment on port 9432.\n OptionsMetadata options = OptionsMetadata.newBuilder().setPort(9432).build();\n ProxyServer server = new ProxyServer(options);\n server.startServer();\n server.awaitRunning();\n\n return server;\n }\n\n### Configuration\n\nConfigure `application.properties` to use the PostgreSQL Hibernate\nDialect and the PostgreSQL JDBC Driver. Configure the PostgreSQL\nJDBC Driver to connect to a PostgreSQL-dialect database through PGAdapter. \n\n # The example uses the standard PostgreSQL Hibernate dialect.\n spring.jpa.database-platform=org.hibernate.dialect.PostgreSQLDialect\n\n # Defining these properties here makes it a bit easier to build the connection string.\n # Change these to match your Cloud Spanner PostgreSQL-dialect database.\n spanner.project=my-project\n spanner.instance=my-instance\n spanner.database=my-database\n # This setting ensures that PGAdapter automatically commits the current transaction if it encounters\n # a DDL statement in a read/write transaction, and then executes the DDL statements as a single DDL\n # batch. \n spanner.ddl_transaction_mode=options=-c%20spanner.ddl_transaction_mode=AutocommitExplicitTransaction\n\n # This is the connection string to PGAdapter running in-process.\n spring.datasource.url=jdbc:postgresql://localhost:9432/projects%2F${spanner.project}%2Finstances%2F${spanner.instance}%2Fdatabases%2F${spanner.database}?${spanner.ddl_transaction_mode}\n\n # You can display SQL statements and stats for debugging if needed.\n spring.jpa.properties.hibernate.show_sql=true\n spring.jpa.properties.hibernate.format_sql=true\n\n # Enable JDBC batching.\n spring.jpa.properties.hibernate.jdbc.batch_size=100\n spring.jpa.properties.hibernate.order_inserts=true\n\nFull Sample Application\n-----------------------\n\nA [working sample application](https://github.com/GoogleCloudPlatform/pgadapter/blob/-/samples/java/spring-data-jpa) is\navailable on GitHub.\n\nWhat's next\n-----------\n\n- Learn more about [Spring Data JPA](https://spring.io/projects/spring-data-jpa).\n- Learn more about [Hibernate ORM](https://hibernate.org/orm/).\n- View the repository for [PGAdapter](https://github.com/GoogleCloudPlatform/pgadapter) on GitHub.\n- [File a GitHub issue](https://github.com/GoogleCloudPlatform/pgadapter/issues) to report a bug or ask a question about PGAdapter.\n- [Integrate Spanner with Spring Data JPA (GoogleSQL dialect)](/spanner/docs/use-spring-data-jpa)."]]