多个spring data源(jdbc/jpa/redis/mongodb)共同使用时冲突问题

当项目里面同时使用了多个spring data源的时候spring会不知道加载那个。

spring log 信息

2022-04-03 13:28:48.978 INFO  [main] RepositoryConfigurationDelegate - Multiple Spring Data modules found, entering strict repository configuration mode!
2022-04-03 13:28:48.980 INFO  [main] RepositoryConfigurationDelegate - Bootstrapping Spring Data JDBC repositories in DEFAULT mode.
2022-04-03 13:28:49.010 INFO  [main] RepositoryConfigurationExtensionSupport - Spring Data JDBC - Could not safely identify store assignment for repository candidate interface ... If you want this repository to be a JDBC repository, consider annotating your entities with one of these annotations: org.springframework.data.relational.core.mapping.Table.

方法一给model加上对应的注解(从根源解决)

https://docs.spring.io/spring-data/jdbc/docs/current/reference/html/#repositories.multiple-modules

• spring-data-jdbc的注解Table
• spring-data-mongodb的注解Document
• spring-data-jpa的注解Entity

---

方法二指定扫描的包，配置文件里禁用不需要的repos

https://stackoverflow.com/questions/39432764/info-warnings-about-multiple-modules-in-spring-boot-what-do-they-mean

这个方法实际测试不生效。

@EnableJpaRepositories(basePackages = "com.acme.repositories.jpa")

@EnableMongoRepositories(basePackages = "com.acme.repositories.mongo")

spring:
  data:
    redis:
      repositories:
        enabled: false
        type: none

---

方法三在EnableJdbcRepositories加上includeFilters绕开限制

@EnableJdbcRepositories(basePackages = "com.acme.repositories.jdbc"，
    includeFilters = {@ComponentScan.Filter(type = FilterType.REGEX, pattern = ".*")}
)

原理：

1. spring在RepositoryConfigurationDelegate里判断时候有多个spring-data源的

    public List registerRepositoriesIn(BeanDefinitionRegistry registry,
            RepositoryConfigurationExtension extension) {
//...(无关代码略)
        Collection> configurations = extension
                .getRepositoryConfigurations(configurationSource, resourceLoader, inMultiStoreMode);
//...(无关代码略)
    }

2. 然后在RepositoryConfigurationExtensionSupport进行判断时候加载

    public  Collection> getRepositoryConfigurations(
            T configSource, ResourceLoader loader, boolean strictMatchesOnly) {

        Assert.notNull(configSource, "ConfigSource must not be null!");
        Assert.notNull(loader, "Loader must not be null!");

        Set> result = new HashSet<>();

        for (BeanDefinition candidate : configSource.getCandidates(loader)) {

            RepositoryConfiguration configuration = getRepositoryConfiguration(candidate, configSource);
            Class repositoryInterface = loadRepositoryInterface(configuration,
                    getConfigurationInspectionClassLoader(loader));

            if (repositoryInterface == null) {
                result.add(configuration);
                continue;
            }

            RepositoryMetadata metadata = AbstractRepositoryMetadata.getMetadata(repositoryInterface);

            boolean qualifiedForImplementation = !strictMatchesOnly || configSource.usesExplicitFilters()
                    || isStrictRepositoryCandidate(metadata);

            if (qualifiedForImplementation && useRepositoryConfiguration(metadata)) {
                result.add(configuration);
            }
        }

        return result;
    }

核心的判断是这个

boolean qualifiedForImplementation = !strictMatchesOnly || configSource.usesExplicitFilters() || isStrictRepositoryCandidate(metadata);

• strictMatchesOnly: 如果有多个spring-data资源这个就为true
• configSource.usesExplicitFilters() 这个就是判断Enable..注解includeFilters,includeFilters时候有设置

所以加上这个就能绕开限制了

includeFilters = {@ComponentScan.Filter(type = FilterType.REGEX, pattern = ".*")}