Question

我在spring boot应用程序中有多个数据源。我的应用程序配置为

spring:
  profiles: default
  datasource:
    url: jdbc:postgresql://${pr.db.host}:${pr.db.port}/${pr.db.name}
    username: ${pr.db.user}
    password: ${pr.db.password}
    driverClassName: org.postgresql.Driver
    test-on-borrow: true
    test-while-idle: true
    validation-query: select 1;
    maxActive: 1
  jpa:
    show-sql: false
    generate-ddl: false
    properties:
      hibernate:
        dialect: org.hibernate.dialect.PostgreSQLDialect
        ddl-auto: validate
        hbm2ddl:
          import_files:

otherdb:
  datasource:
    url: jdbc:postgresql://${pf.db.host}:${pf.db.port}/${pf.db.name}
    username: ${pf.db.user}
    password: ${pf.db.password}
    driverClassName: org.postgresql.Driver
    test-on-borrow: true
    test-while-idle: true
    validation-query: select 1;
    maxActive: 1

然后，我在DBOneConfig包中创建了两个类OtherDBConfig和com.company.project.dbconfig。

DBOneConfig看起来像这样（请注意，我已将其标记为FlywayDataSource）

@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(
  entityManagerFactoryRef = "entityManagerFactory",
  basePackages = {"com.company.project.repo"}
)
public class DbOneConfig {
  @Primary
  @Bean(name = "dataSource")
  @FlywayDataSource
  @ConfigurationProperties(prefix="spring.datasource")
  public DataSource dataSource() {
    DataSource dataSource = DataSourceBuilder.create().build();
    return dataSource;
  }

  @Primary
  @Bean(name = "entityManagerFactory")
  public LocalContainerEntityManagerFactoryBean entityManagerFactory(
    EntityManagerFactoryBuilder builder,
    @Qualifier("dataSource") DataSource dataSource) {
    return builder
      .dataSource(dataSource)
      .packages("com.worldgaming.pennyrama.domain")
      .persistenceUnit("pennyrama")
      .build();
  }

  @Primary
  @Bean(name = "transactionManager")
  public PlatformTransactionManager transactionManager(
    @Qualifier("entityManagerFactory") EntityManagerFactory entityManagerFactory) {
    return new JpaTransactionManager(entityManagerFactory);
  }
}

现在，当我运行项目时，我得到了以下异常

[2016-06-20 21:38:56.196] [main] ERROR o.s.boot.SpringApplication - Application startup failed 
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'flywayInitializer' defined in class path resource [org/springframework/boot/autoconfigure/flyway/FlywayAutoConfiguration$FlywayConfiguration.class]: Invocation of init method failed; nested exception is org.flywaydb.core.api.FlywayException: Unable to obtain Jdbc connection from DataSource
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1578)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:296)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
    at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1054)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:829)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:538)
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:118)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:766)
    at org.springframework.boot.SpringApplication.createAndRefreshContext(SpringApplication.java:361)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:307)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1191)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1180)
    at com.worldgaming.pennyrama.Application.main(Application.java:12)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)
Caused by: org.flywaydb.core.api.FlywayException: Unable to obtain Jdbc connection from DataSource
    at org.flywaydb.core.internal.util.jdbc.JdbcUtils.openConnection(JdbcUtils.java:56)
    at org.flywaydb.core.Flyway.execute(Flyway.java:1386)
    at org.flywaydb.core.Flyway.migrate(Flyway.java:1006)
    at org.springframework.boot.autoconfigure.flyway.FlywayMigrationInitializer.afterPropertiesSet(FlywayMigrationInitializer.java:66)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1637)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574)
    ... 23 common frames omitted
Caused by: org.apache.tomcat.jdbc.pool.PoolExhaustedException: [main] Timeout: Pool empty. Unable to fetch a connection in 30 seconds, none available[size:1; busy:1; idle:0; lastwait:30000].
    at org.apache.tomcat.jdbc.pool.ConnectionPool.borrowConnection(ConnectionPool.java:681)
    at org.apache.tomcat.jdbc.pool.ConnectionPool.getConnection(ConnectionPool.java:185)
    at org.apache.tomcat.jdbc.pool.DataSourceProxy.getConnection(DataSourceProxy.java:127)
    at org.flywaydb.core.internal.util.jdbc.JdbcUtils.openConnection(JdbcUtils.java:50)
    ... 28 common frames omitted

Answer 1

请注意，每个数据行都需要有两个不同的类。他们每个人还应该参考他们在Repository文件夹及其实体中的设置。这样，当它被使用时，它将知道使用了哪些数据源。

通常，当您使用多数据源时，hibernate不会将camelcase转换为下划线，您应该使用：

@Table(name = "investor_destination")
@Column(name = "dest_type")

Flyway无法在spring boot多数据源应用程序中找到数据源

1 个答案: