DatabaseConfiguration.java 文件源码

@Bean(destroyMethod = "close")
@ConditionalOnExpression("#{!environment.acceptsProfiles('" + Constants.SPRING_PROFILE_CLOUD + "') && !environment.acceptsProfiles('" + Constants.SPRING_PROFILE_HEROKU + "')}")
@ConfigurationProperties(prefix = "spring.datasource.hikari")
public DataSource dataSource(DataSourceProperties dataSourceProperties) {
    log.debug("Configuring Datasource");
    if (dataSourceProperties.getUrl() == null) {
        log.error("Your database connection pool configuration is incorrect! The application" +
                " cannot start. Please check your Spring profile, current profiles are: {}",
            Arrays.toString(env.getActiveProfiles()));

        throw new ApplicationContextException("Database connection pool is not configured correctly");
    }
    HikariDataSource hikariDataSource =  (HikariDataSource) DataSourceBuilder
            .create(dataSourceProperties.getClassLoader())
            .type(HikariDataSource.class)
            .driverClassName(dataSourceProperties.getDriverClassName())
            .url(dataSourceProperties.getUrl())
            .username(dataSourceProperties.getUsername())
            .password(dataSourceProperties.getPassword())
            .build();

    if (metricRegistry != null) {
        hikariDataSource.setMetricRegistry(metricRegistry);
    }
    return hikariDataSource;
}