How to commit changes? - spring

Question

In my Spring Boot application the SQLite file (myapp.db) will be used in an Android app, pre-populated. My problem occurs when I try to copy this SQLite file. When a connection is opened it creates temporary files:
myapp.db
myapp.db-wal
myapp.db-shm
These files contain pending changes, so when I copy myapp.db, the tables are empty. I tried to close the connection and stopping the server but changes never are committed to myapp.db.
Configuration class:
#Configuration
#EnableJpaRepositories(
transactionManagerRef = "sqliteTransactionManager",
entityManagerFactoryRef = "sqliteEntityManagerFactory",
basePackages = {
"com.app.sqlite.domain",
"com.app.sqlite.repository" }
)
public class DatabaseConfiguration {
private final Logger log = LoggerFactory.getLogger(DatabaseConfiguration.class);
#Bean(name = "sqlite_db")
public DataSource sqliteDataSource() {
HikariConfig config = new HikariConfig();
config.setPoolName("sqlite_db");
config.setAutoCommit(false);
config.setJdbcUrl("jdbc:sqlite:/dbgen/myapp.db");
config.setDriverClassName("org.sqlite.JDBC");
DataSource dataSource = new HikariDataSource(config);
return dataSource;
}
#Bean(name = "sqliteEntityManagerFactory")
public LocalContainerEntityManagerFactoryBean customerEntityManagerFactory(EntityManagerFactoryBuilder builder) {
Properties properties = new Properties();
properties.setProperty("hibernate.dialect", "com.app.config.SQLiteDialect");
LocalContainerEntityManagerFactoryBean emf = builder.dataSource(sqliteDataSource())
.packages(WorkoutSQLITE.class).persistenceUnit("sqliteunit").build();
emf.setJpaProperties(properties);
return emf;
}
#Bean(name = "sqliteTransactionManager")
public JpaTransactionManager dbTransactionManager(
#Qualifier("sqliteEntityManagerFactory") final EntityManagerFactory emf) {
JpaTransactionManager transactionManager = new JpaTransactionManager();
transactionManager.setEntityManagerFactory(emf);
return transactionManager;
}
}
How can I commit/synchronize changes to myapp.db?