Spring data r2dbc:与 mysql 连接时出现问题 - 找不到“r2dbcEntityTemplate”
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【中文标题】Spring data r2dbc:与 mysql 连接时出现问题 - 找不到“r2dbcEntityTemplate”【英文标题】:Spring data r2dbc: Problem connecting with mysql - 'r2dbcEntityTemplate' could not be found 【发布时间】:2021-11-20 02:30:59 【问题描述】:我的 Spring Boot 应用程序正在尝试使用 Spring Data r2dbc 连接到 mysql
5.7。设置似乎非常简单。但是,我一直遇到意外的异常。
任何帮助将不胜感激。
日志:
2021-09-28 10:13:48.591 INFO 12261 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data R2DBC repositories in DEFAULT mode.
2021-09-28 10:13:48.651 INFO 12261 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 52 ms. Found 1 R2DBC repository interfaces.
//...
2021-09-28 10:13:49.250 WARN 12261 --- [ restartedMain] onfigReactiveWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt:
//...
Error creating bean with name 'healthCheckRepository' defined in application.model.respository.r2dbc.HealthCheckRepository defined in @EnableR2dbcRepositories declared on MainApplication: Cannot resolve reference to bean 'r2dbcEntityTemplate' while setting bean property 'entityOperations'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'r2dbcEntityTemplate' available
//...
Description:
Parameter 0 of constructor in application.service.HealthCheckService required a bean named 'r2dbcEntityTemplate' that could not be found.
Action:
Consider defining a bean named 'r2dbcEntityTemplate' in your configuration.
应用程序.yaml
spring:
r2dbc:
url: r2dbc:pool:mysql//server/database?useUnicode=true&characterEncoding=UTF-8&useSSL=false&useLocalSessionState=true
username: username
password: password
pool:
enabled: true
max-size: 20
validation-query: SELECT 1
initial-size: 5
max-idle-time: 30m
data:
r2dbc:
repositories:
enabled: true
build.gradle
plugins
id 'java'
id 'org.springframework.boot' version '2.5.5'
id 'io.spring.dependency-management' version '1.0.11.RELEASE'
id "io.freefair.lombok" version "6.2.0" //using
dependencies
implementation 'org.springframework.boot:spring-boot-starter'
implementation 'org.springframework.boot:spring-boot-starter-log4j2'
// implementation 'org.springframework.boot:spring-boot-starter-data-redis-reactive'
implementation 'org.springframework.boot:spring-boot-starter-data-r2dbc'
runtimeOnly 'dev.miku:r2dbc-mysql:0.8.2.RELEASE'
runtimeOnly 'mysql:mysql-connector-java'
【问题讨论】:
为什么不用 com.mysql.jdbc.Driver 而不是 r2dbc? @NguyễnVănQuyền 我需要一个用于潜在高负载环境的反应式驱动程序 ***.com/questions/56655291/…。这可能会对您有所帮助! @NguyễnVănQuyền 感谢您的尝试。不幸的是,它并没有真正帮助,因为我在application.yaml
中定义连接配置,而不是在代码中创建ConnectionFactory
和DataClient
(github.com/spring-projects/spring-data-r2dbc/issues/143)
【参考方案1】:
原来是 Spring 启动问题。解决方法请参考下面的 git issue
https://github.com/spring-projects/spring-data-r2dbc/issues/659
【讨论】:
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