mongodb - 如何在不依赖MongoDB的情况下启动spring-boot应用程序？

Question

问题How to start spring-boot app without depending on Database?解决了当mysql宕机时如何启动spring-boot应用程序。

是否可以对 mongoDB 执行相同的操作？

在 Spring boot application properties 中找不到任何支持它的属性。

Spring启动配置

spring.data.mongodb.uri: mongodb://localhost:27017/measurements-db

我得到以下堆栈跟踪

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'diseaseRepository': Invocation of init method failed; nested exception is org.springframework.dao.DataAccessResourceFailureException: Timed out after 10000 ms while waiting for a server that matches AnyServerSelector{}. Client view of cluster state is {type=Unknown, servers=[{address=docker.me:27017, type=Unknown, state=Connecting, exception={com.mongodb.MongoException$Network: Exception opening the socket}, caused by {java.net.ConnectException: Connection refused}}]; nested exception is com.mongodb.MongoTimeoutException: Timed out after 10000 ms while waiting for a server that matches AnyServerSelector{}. Client view of cluster state is {type=Unknown, servers=[{address=docker.me:27017, type=Unknown, state=Connecting, exception={com.mongodb.MongoException$Network: Exception opening the socket}, caused by {java.net.ConnectException: Connection refused}}]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1578) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1192) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1116) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1014) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:545) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
... 24 common frames omitted
Caused by: org.springframework.dao.DataAccessResourceFailureException: Timed out after 10000 ms while waiting for a server that matches AnyServerSelector{}. Client view of cluster state is {type=Unknown, servers=[{address=docker.me:27017, type=Unknown, state=Connecting, exception={com.mongodb.MongoException$Network: Exception opening the socket}, caused by {java.net.ConnectException: Connection refused}}]; nested exception is com.mongodb.MongoTimeoutException: Timed out after 10000 ms while waiting for a server that matches AnyServerSelector{}. Client view of cluster state is {type=Unknown, servers=[{address=docker.me:27017, type=Unknown, state=Connecting, exception={com.mongodb.MongoException$Network: Exception opening the socket}, caused by {java.net.ConnectException: Connection refused}}]
at org.springframework.data.mongodb.core.MongoExceptionTranslator.translateExceptionIfPossible(MongoExceptionTranslator.java:75) ~[spring-data-mongodb-1.8.4.RELEASE.jar:na]
at org.springframework.data.mongodb.core.index.MongoPersistentEntityIndexCreator.createIndex(MongoPersistentEntityIndexCreator.java:162) ~[spring-data-mongodb-1.8.4.RELEASE.jar:na]
at org.springframework.data.mongodb.core.index.MongoPersistentEntityIndexCreator.checkForAndCreateIndexes(MongoPersistentEntityIndexCreator.java:133) ~[spring-data-mongodb-1.8.4.RELEASE.jar:na]
at org.springframework.data.mongodb.core.index.MongoPersistentEntityIndexCreator.checkForIndexes(MongoPersistentEntityIndexCreator.java:125) ~[spring-data-mongodb-1.8.4.RELEASE.jar:na]
at org.springframework.data.mongodb.core.index.MongoPersistentEntityIndexCreator.onApplicationEvent(MongoPersistentEntityIndexCreator.java:109) ~[spring-data-mongodb-1.8.4.RELEASE.jar:na]
at org.springframework.data.mongodb.core.index.MongoPersistentEntityIndexCreator.onApplicationEvent(MongoPersistentEntityIndexCreator.java:51) ~[spring-data-mongodb-1.8.4.RELEASE.jar:na]
at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:166) ~[spring-context-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:138) ~[spring-context-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:381) ~[spring-context-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:335) ~[spring-context-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.springframework.data.mapping.context.AbstractMappingContext.addPersistentEntity(AbstractMappingContext.java:326) ~[spring-data-commons-1.11.4.RELEASE.jar:na]
at org.springframework.data.mapping.context.AbstractMappingContext.getPersistentEntity(AbstractMappingContext.java:179) ~[spring-data-commons-1.11.4.RELEASE.jar:na]
at org.springframework.data.mapping.context.AbstractMappingContext.getPersistentEntity(AbstractMappingContext.java:139) ~[spring-data-commons-1.11.4.RELEASE.jar:na]
at org.springframework.data.mapping.context.AbstractMappingContext.getPersistentEntity(AbstractMappingContext.java:66) ~[spring-data-commons-1.11.4.RELEASE.jar:na]
at org.springframework.data.mongodb.repository.support.MongoRepositoryFactory.getEntityInformation(MongoRepositoryFactory.java:118) ~[spring-data-mongodb-1.8.4.RELEASE.jar:na]
at org.springframework.data.mongodb.repository.support.MongoRepositoryFactory.getTargetRepository(MongoRepositoryFactory.java:92) ~[spring-data-mongodb-1.8.4.RELEASE.jar:na]
at org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:185) ~[spring-data-commons-1.11.4.RELEASE.jar:na]
at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.initAndReturn(RepositoryFactoryBeanSupport.java:251) ~[spring-data-commons-1.11.4.RELEASE.jar:na]
at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.afterPropertiesSet(RepositoryFactoryBeanSupport.java:237) ~[spring-data-commons-1.11.4.RELEASE.jar:na]
at org.springframework.data.mongodb.repository.support.MongoRepositoryFactoryBean.afterPropertiesSet(MongoRepositoryFactoryBean.java:108) ~[spring-data-mongodb-1.8.4.RELEASE.jar:na]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1637) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
... 34 common frames omitted
Caused by: com.mongodb.MongoTimeoutException: Timed out after 10000 ms while waiting for a server that matches AnyServerSelector{}. Client view of cluster state is {type=Unknown, servers=[{address=docker.me:27017, type=Unknown, state=Connecting, exception={com.mongodb.MongoException$Network: Exception opening the socket}, caused by {java.net.ConnectException: Connection refused}}]
at com.mongodb.BaseCluster.getServer(BaseCluster.java:82) ~[mongo-java-driver-2.13.3.jar:na]
at com.mongodb.DBTCPConnector.getServer(DBTCPConnector.java:664) ~[mongo-java-driver-2.13.3.jar:na]
at com.mongodb.DBTCPConnector.access$500(DBTCPConnector.java:40) ~[mongo-java-driver-2.13.3.jar:na]
at com.mongodb.DBTCPConnector$MyPort.getConnection(DBTCPConnector.java:513) ~[mongo-java-driver-2.13.3.jar:na]
at com.mongodb.DBTCPConnector$MyPort.get(DBTCPConnector.java:456) ~[mongo-java-driver-2.13.3.jar:na]
at com.mongodb.DBTCPConnector.getPrimaryPort(DBTCPConnector.java:415) ~[mongo-java-driver-2.13.3.jar:na]
at com.mongodb.DBCollectionImpl.createIndex(DBCollectionImpl.java:378) ~[mongo-java-driver-2.13.3.jar:na]
at com.mongodb.DBCollection.createIndex(DBCollection.java:597) ~[mongo-java-driver-2.13.3.jar:na]
at org.springframework.data.mongodb.core.index.MongoPersistentEntityIndexCreator.createIndex(MongoPersistentEntityIndexCreator.java:142) ~[spring-data-mongodb-1.8.4.RELEASE.jar:na]
... 54 common frames omitted

Answer 1

这是3年后的事了……但现在这是可能的。

问题是启用了自动索引创建。使用 Spring Boot 2.2，现在可以在启动时禁用并推迟任何必要的索引创建到 ApplicationReadyEvent 监听器。

您需要更改的具体属性是 spring.data.mongodb.auto-index-creation 并设置 将其设置为 false(这将是 future 版本中的默认值)。

下面是一个可以(并且应该!)取代它的 ApplicationReadyEvent 监听器的示例。

@EventListener(ApplicationReadyEvent.class)
public void initIndicesAfterStartup() {
    IndexOperations indexOps = mongoTemplate.indexOps(DomainType.class);
    IndexResolver resolver = new MongoPersistentEntityIndexResolver(mongoMappingContext);
    resolver.resolveIndexFor(DomainType.class).forEach(indexOps::ensureIndex);
}