首次部署后 jhipster heroku 无法连接到数据源

Question

使用 yo jhipster:heroku 将 jhipster 1.4.0 成功部署到 heroku 后，我对我的代码进行更改（无论更改如何），然后执行：grunt deployHeroku，然后推送到 heroku master。 但是 Jhipster 使用本地数据源来尝试连接：

2014-10-14T19:38:59.648294+00:00 app[web.1]: Picked up JAVA_TOOL_OPTIONS:  -Djava.rmi.server.useCodebaseOnly=true -Djava.rmi.server.useCodebaseOnly=true
2014-10-14T19:39:02.704297+00:00 app[web.1]: [INFO] es.japanathome.Application - Starting Application on 347e60b4-335d-489e-96c1-036737b62d48 with PID 2 (started by u6297 in /app)
2014-10-14T19:39:02.704442+00:00 app[web.1]: [DEBUG] es.japanathome.Application - Running with Spring Boot v1.1.7.RELEASE, Spring v4.0.7.RELEASE
2014-10-14T19:39:06.306581+00:00 app[web.1]: [DEBUG] org.jboss.logging - Logging Provider: org.jboss.logging.Slf4jLoggerProvider
2014-10-14T19:39:06.553454+00:00 app[web.1]: [DEBUG] es.japanathome.config.AsyncConfiguration - Creating Async Task Executor
2014-10-14T19:39:06.915540+00:00 app[web.1]: [DEBUG] es.japanathome.config.DatabaseConfiguration - Configuring Datasource
2014-10-14T19:39:07.912527+00:00 app[web.1]: [DEBUG] es.japanathome.config.DatabaseConfiguration - Configuring Liquibase
2014-10-14T19:39:38.492503+00:00 app[web.1]:    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
2014-10-14T19:39:38.492538+00:00 app[web.1]:    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298)
2014-10-14T19:39:38.492577+00:00 app[web.1]:    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
2014-10-14T19:39:38.492649+00:00 app[web.1]:    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:370)
2014-10-14T19:39:38.492726+00:00 app[web.1]:    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1095)
2014-10-14T19:39:38.492763+00:00 app[web.1]:    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:990)
2014-10-14T19:39:38.492804+00:00 app[web.1]:    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504)
2014-10-14T19:39:38.492861+00:00 app[web.1]:    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
2014-10-14T19:39:38.492894+00:00 app[web.1]:    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302)
2014-10-14T19:39:38.492935+00:00 app[web.1]:    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
2014-10-14T19:39:38.492971+00:00 app[web.1]:    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298)
2014-10-14T19:39:38.493037+00:00 app[web.1]:    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
2014-10-14T19:39:38.493078+00:00 app[web.1]:    at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1021)
2014-10-14T19:39:38.493108+00:00 app[web.1]:    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:916)
2014-10-14T19:39:38.493148+00:00 app[web.1]:    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:862)
2014-10-14T19:39:38.493186+00:00 app[web.1]:    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:481)
2014-10-14T19:39:38.493211+00:00 app[web.1]:    ... 94 more
2014-10-14T19:39:38.493291+00:00 app[web.1]: Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'liquibase' defined in class path resource [es/japanathome/config/DatabaseConfiguration.class]: Invocation of init method failed; nested exception is liquibase.exception.DatabaseException: java.sql.SQLException: Timeout of 30000ms encountered waiting for connection.

正如您所见，它使用 DatabaseConfiguration 而不是使用 HerokuDatabaseConfiguration，所以这就是问题所在。但我不知道为什么，有什么想法吗？

Answer 1

解决办法是去掉ConditionalOnMissingClass的DatabaseConfiguration结尾的“.class”。

@ConditionalOnMissingClass(name = "my.app.HerokuDatabaseConfiguration.class") 更改为 @ConditionalOnMissingClass(name = "HerokuDatabaseConfiguration") 帮助了我。

我认为 ConditionalOnMissing 只是在寻找 ClassName 并暗示 .class 后缀。使用已弃用的“值”可以添加类。