在 Spring-Boot 中，我们如何连接到同一个项目中的两个数据库（Mysql 数据库和 MongoDB）？

Question

我正在尝试创建一个“Spring-Boot”项目，其中我需要连接到不同的数据库“MySql”和“MongoDB”。

我需要做一些特殊的事情来连接到两个数据库还是 spring-boot 会自动连接到两个数据库。 我是否还需要为“mongodb”定义数据源？

MySQL特定的“YML”文件如下

# Default DB parameter definitions for the URL parameters in the spring.datasource.url property below
database:
  host: localhost
  port: 3306
  schema: subscriptions
  username: root
  password: root
  autoconnect:
    maxReconnects: 3
    initialTimeout: 2
  timeout:
    connectTimeout: 0
    socketTimeout: 0
  failover:
    host: localhost 
    port: 3306
    queriesBeforeRetryMaster: 50
    secondsBeforeRetryMaster: 30
  properties: useTimezone=true&serverTimezone=UTC&useLegacyDatetimeCode=false&failOverReadOnly=false&autoReconnect=true&maxReconnects=${database.autoconnect.maxReconnects}&initialTimeout=${database.autoconnect.initialTimeout}&connectTimeout=${database.timeout.connectTimeout}&socketTimeout=${database.timeout.socketTimeout}&queriesBeforeRetryMaster=${database.failover.queriesBeforeRetryMaster}&secondsBeforeRetryMaster=${database.failover.secondsBeforeRetryMaster}

spring:
  datasource:
    driverClassName: com.mysql.jdbc.Driver
    url: jdbc:mysql://${database.host}:${database.port},${database.failover.host}:${database.failover.port}/${database.schema}?${database.properties}
    username: ${database.username}
    password: ${database.password}
    continueOnError: true
    initialize: false
    initialSize: 0
    timeBetweenEvictionRunsMillis: 5000
    minEvictableIdleTimeMillis: 5000
    removeAbandonedTimeout: 60
    removeAbandoned: true
    minIdle: 0

  jpa:
    show-sql: true
    hibernate:
      ddl-auto: none
      naming_strategy: org.hibernate.cfg.DefaultNamingStrategy
    properties:
      hibernate:
        dialect: org.hibernate.dialect.MySQL5Dialect
        hbm2ddl:
          auto: none
        temp:
          use_jdbc_metadata_defaults: false

我的 MongoDB“YML”如下所示

spring:
  data:
    mongodb.host: localhost
    mongodb.port: 27017
    mongodb.database: eventsarchive
    mongodb.username: root
    mongodb.password: root
    mongodb.repositories.enabled: true

Application.java 文件如下

@Configuration
@EnableAutoConfiguration
@EnableConfigurationProperties
@EntityScan(basePackages = { "persistence.mysql.domain" })
@EnableJpaRepositories("persistence.mysql.dao")
@EnableMongoRepositories("persistence.mongodb.dao")
@ComponentScan(excludeFilters = { @ComponentScan.Filter(type = FilterType.ASSIGNABLE_TYPE,
value = ApiAuthenticationFilter.class) },
basePackages = {
                "admin",
                "common",
                "mqclient",
"scheduler" })
public class Application {

  @Value("${service.name}")
  private String serviceName;
  @Value("${service.namespace}")
  private String serviceNamespace;
  @Value("${webservice.namespace}")
  private String webserviceNamespace;
  @Value("${webservice.port}")
  private int webservicePort;
  @Value("${jersey.request-filters}")
  private String requestFilters;
  @Value("${jersey.response-filters}")
  private String responseFilters;

  private static final String MAPPING_URL = "/%s/*";

  static {
    System.setProperty(USER_TIMEZONE, "UTC");
  }

  /**
   * Java main method.
   */
  public static void main(String[] args) {
    /*
     * Defines which Spring Boot Profiles should be active on startup. Please see
     * http://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/#boot-features-profiles for details.
     */
    final SpringApplicationBuilder appBuilder = new SpringApplicationBuilder(Application.class);
    appBuilder.profiles("common", "common_mongo_db", "common_mysql_db", "common_rabbitmq", "admin").application()
    .run(args);
  }

  /**
   * Registers Jersey with Spring Boot.
   */
  @Bean
  public ServletRegistrationBean registerJersey() {
    final ServletRegistrationBean registration = new ServletRegistrationBean(new SpringServlet(),
                                                                             String.format(MAPPING_URL,
                                                                                           this.serviceNamespace));

    registration.addInitParameter(JERSEY_MAPPING_FEATURE, Boolean.toString(true));
    registration.addInitParameter(PROPERTY_CONTAINER_REQUEST_FILTERS, this.requestFilters);
    registration.addInitParameter(PROPERTY_CONTAINER_RESPONSE_FILTERS, this.responseFilters);
    registration.addInitParameter(PROPERTY_RESOURCE_FILTER_FACTORIES, ValidationResourceFilterFactory.class.getName());

    return registration;
  }

  /**
   * This method initializes SimpleHttpServerJaxWsServiceExporter bean which reads all @Webservice annotated components
   * and hosts web service for them.
   *
   * @return SimpleHttpServerJaxWsServiceExporter
   */
  @Bean
  public SimpleHttpServerJaxWsServiceExporter exportJaxwsService() {
    final SimpleHttpServerJaxWsServiceExporter jaxWsServiceExporter = new SimpleHttpServerJaxWsServiceExporter();
    jaxWsServiceExporter.setPort(this.webservicePort);
    jaxWsServiceExporter.setBasePath("/" + this.serviceNamespace + "/" + this.webserviceNamespace + "/");
    return jaxWsServiceExporter;
  }

  @Bean
  @Primary
  @ConfigurationProperties(prefix = "spring.datasource")
  public DataSource primaryDataSource() {
    return DataSourceBuilder.create().build();
  }

  @Bean
  public EmbeddedServletContainerFactory servletContainer() {
    TomcatEmbeddedServletContainerFactory factory = new TomcatEmbeddedServletContainerFactory();
    factory.setTomcatContextCustomizers(Arrays.asList(new CustomCustomizer()));
    return factory;
  }

  static class CustomCustomizer implements TomcatContextCustomizer {

    @Override
    public void customize(Context context) {
      context.setUseHttpOnly(false);
      context.setCookies(false);
    }
  }
}

Answer 1

本论坛没有任何关于连接同一个spring-boot项目中的两个不同数据库（Mysql数据库和MongoDB）的问题。

我已经完成了这项工作，因此我将其作为答案发布在这里。

使用下面给定的配置和存储库作为 JpaRepository 或 MongoRepository，具体取决于数据库特定存储库所属。

MySQL特定的“YML”文件如下

# Default DB parameter definitions for the URL parameters in the spring.datasource.url property below
database:
  host: localhost
  port: 3306
  schema: subscriptions
  username: root
  password: root
  autoconnect:
    maxReconnects: 3
    initialTimeout: 2
  timeout:
    connectTimeout: 0
    socketTimeout: 0
  failover:
    host: localhost 
    port: 3306
    queriesBeforeRetryMaster: 50
    secondsBeforeRetryMaster: 30
  properties: useTimezone=true&serverTimezone=UTC&useLegacyDatetimeCode=false&failOverReadOnly=false&autoReconnect=true&maxReconnects=${database.autoconnect.maxReconnects}&initialTimeout=${database.autoconnect.initialTimeout}&connectTimeout=${database.timeout.connectTimeout}&socketTimeout=${database.timeout.socketTimeout}&queriesBeforeRetryMaster=${database.failover.queriesBeforeRetryMaster}&secondsBeforeRetryMaster=${database.failover.secondsBeforeRetryMaster}

spring:
  datasource:
    driverClassName: com.mysql.jdbc.Driver
    url: jdbc:mysql://${database.host}:${database.port},${database.failover.host}:${database.failover.port}/${database.schema}?${database.properties}
    username: ${database.username}
    password: ${database.password}
    continueOnError: true
    initialize: false
    initialSize: 0
    timeBetweenEvictionRunsMillis: 5000
    minEvictableIdleTimeMillis: 5000
    removeAbandonedTimeout: 60
    removeAbandoned: true
    minIdle: 0
  
  jpa:
    show-sql: true
    hibernate:
      ddl-auto: none
      naming_strategy: org.hibernate.cfg.DefaultNamingStrategy
    properties:
      hibernate:
        dialect: org.hibernate.dialect.MySQL5Dialect
        hbm2ddl:
          auto: none
        temp:
          use_jdbc_metadata_defaults: false

我的 MongoDB“YML”如下所示

spring:
  data:
    mongodb.host: localhost
    mongodb.port: 27017
    mongodb.database: eventsarchive
    mongodb.username: root
    mongodb.password: root
    mongodb.repositories.enabled: true

Application.java 文件如下

@Configuration
@EnableAutoConfiguration
@EnableConfigurationProperties
@EntityScan(basePackages = { "persistence.mysql.domain" })
@EnableJpaRepositories("persistence.mysql.dao")
@EnableMongoRepositories("persistence.mongodb.dao")
@ComponentScan(excludeFilters = { @ComponentScan.Filter(type = FilterType.ASSIGNABLE_TYPE,
value = ApiAuthenticationFilter.class) },
basePackages = {
                "admin",
                "common",
                "mqclient",
"scheduler" })
public class Application {

  @Value("${service.name}")
  private String serviceName;
  @Value("${service.namespace}")
  private String serviceNamespace;
  @Value("${webservice.namespace}")
  private String webserviceNamespace;
  @Value("${webservice.port}")
  private int webservicePort;
  @Value("${jersey.request-filters}")
  private String requestFilters;
  @Value("${jersey.response-filters}")
  private String responseFilters;

  private static final String MAPPING_URL = "/%s/*";

  static {
    System.setProperty(USER_TIMEZONE, "UTC");
  }

  /**
   * Java main method.
   */
  public static void main(String[] args) {
    /*
     * Defines which Spring Boot Profiles should be active on startup. Please see
     * http://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/#boot-features-profiles for details.
     */
    final SpringApplicationBuilder appBuilder = new SpringApplicationBuilder(Application.class);
    appBuilder.profiles("common", "common_mongo_db", "common_mysql_db", "common_rabbitmq", "admin").application()
    .run(args);
  }

  /**
   * Registers Jersey with Spring Boot.
   */
  @Bean
  public ServletRegistrationBean registerJersey() {
    final ServletRegistrationBean registration = new ServletRegistrationBean(new SpringServlet(),
                                                                             String.format(MAPPING_URL,
                                                                                           this.serviceNamespace));

    registration.addInitParameter(JERSEY_MAPPING_FEATURE, Boolean.toString(true));
    registration.addInitParameter(PROPERTY_CONTAINER_REQUEST_FILTERS, this.requestFilters);
    registration.addInitParameter(PROPERTY_CONTAINER_RESPONSE_FILTERS, this.responseFilters);
    registration.addInitParameter(PROPERTY_RESOURCE_FILTER_FACTORIES, ValidationResourceFilterFactory.class.getName());

    return registration;
  }

  /**
   * This method initializes SimpleHttpServerJaxWsServiceExporter bean which reads all @Webservice annotated components
   * and hosts web service for them.
   *
   * @return SimpleHttpServerJaxWsServiceExporter
   */
  @Bean
  public SimpleHttpServerJaxWsServiceExporter exportJaxwsService() {
    final SimpleHttpServerJaxWsServiceExporter jaxWsServiceExporter = new SimpleHttpServerJaxWsServiceExporter();
    jaxWsServiceExporter.setPort(this.webservicePort);
    jaxWsServiceExporter.setBasePath("/" + this.serviceNamespace + "/" + this.webserviceNamespace + "/");
    return jaxWsServiceExporter;
  }

  @Bean
  @Primary
  @ConfigurationProperties(prefix = "spring.datasource")
  public DataSource primaryDataSource() {
    return DataSourceBuilder.create().build();
  }

  @Bean
  public EmbeddedServletContainerFactory servletContainer() {
    TomcatEmbeddedServletContainerFactory factory = new TomcatEmbeddedServletContainerFactory();
    factory.setTomcatContextCustomizers(Arrays.asList(new CustomCustomizer()));
    return factory;
  }

  static class CustomCustomizer implements TomcatContextCustomizer {

    @Override
    public void customize(Context context) {
      context.setUseHttpOnly(false);
      context.setCookies(false);
    }
  }
}

在 Spring-Boot 中，我们如何连接到同一个项目中的两个数据库（Mysql 数据库和 MongoDB）？

问题描述

1 个解决方案

解决方案1
5 已采纳 2015-10-07 12:09:50

在 Spring-Boot 中，我们如何连接到同一个项目中的两个数据库（Mysql 数据库和 MongoDB）？

问题描述

1 个解决方案

解决方案1 5 已采纳 2015-10-07 12:09:50

解决方案1
5 已采纳 2015-10-07 12:09:50