spring boot 2.3整合 jpa 和shading-jdbc 读写分离

spring boot version

org.springframework.boot
spring-boot-starter-parent
2.3.0.RELEASE

pom.xml

	org.apache.commons
	commons-dbcp2


	mysql
	mysql-connector-java
	8.0.18



	org.springframework.boot
	spring-boot-starter-data-jpa



	org.apache.shardingsphere
	sharding-jdbc-spring-boot-starter
	4.1.0

bootstrap-sharding.yml [相关配置需要自己补充]

spring:
  shardingsphere:
    datasource:
      names: master,slave0,slave1 # 数据源名称，多数据源以逗号分隔
      master:
        driver-class-name: com.mysql.cj.jdbc.Driver
        type: org.apache.commons.dbcp2.BasicDataSource
        password: 
        url:
        username:
      slave0:
        driver-class-name: com.mysql.cj.jdbc.Driver
        type: org.apache.commons.dbcp2.BasicDataSource
        password: 
        url: 
        username: 
      slave1:
        driver-class-name: com.mysql.cj.jdbc.Driver
        password: 
        type: org.apache.commons.dbcp2.BasicDataSource
        url: 
        username: 
    masterslave:
      load-balance-algorithm-type: ROUND_ROBIN #从库负载均衡算法类型，可选值：ROUND_ROBIN，RANDOM。若`load-balance-algorithm-class-name`存在则忽略该配置
      master-data-source-name: master
      name: master
      slave-data-source-names: slave0,slave1

其他的 Repository entity 等就不写了

项目启动成功后会发现如下异常

2020-06-09 18:00:35 WARN  [-RMI TCP Connection(1)-192.168.0.152] [87] [org.springframework.boot.actuate.jdbc.DataSourceHealthIndicator] : DataSource health check failed
org.springframework.dao.InvalidDataAccessApiUsageException: ConnectionCallback; isValid; nested exception is java.sql.SQLFeatureNotSupportedException: isValid
	at org.springframework.jdbc.support.SQLExceptionSubclassTranslator.doTranslate(SQLExceptionSubclassTranslator.java:96)
	at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:72)
	at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:81)
	at org.springframework.jdbc.core.JdbcTemplate.translateException(JdbcTemplate.java:1443)
	at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:336)
	at org.springframework.boot.actuate.jdbc.DataSourceHealthIndicator.isConnectionValid(DataSourceHealthIndicator.java:130)
	at org.springframework.boot.actuate.jdbc.DataSourceHealthIndicator.doDataSourceHealthCheck(DataSourceHealthIndicator.java:116)
	at org.springframework.boot.actuate.jdbc.DataSourceHealthIndicator.doHealthCheck(DataSourceHealthIndicator.java:100)
	at org.springframework.boot.actuate.health.AbstractHealthIndicator.health(AbstractHealthIndicator.java:82)
	at org.springframework.boot.actuate.health.HealthIndicator.getHealth(HealthIndicator.java:37)
	at org.springframework.boot.actuate.health.HealthEndpoint.getHealth(HealthEndpoint.java:71)
	at org.springframework.boot.actuate.health.HealthEndpoint.getHealth(HealthEndpoint.java:39)
	at org.springframework.boot.actuate.health.HealthEndpointSupport.getContribution(HealthEndpointSupport.java:99)
	at org.springframework.boot.actuate.health.HealthEndpointSupport.getAggregateHealth(HealthEndpointSupport.java:110)
	at org.springframework.boot.actuate.health.HealthEndpointSupport.getContribution(HealthEndpointSupport.java:96)
	at org.springframework.boot.actuate.health.HealthEndpointSupport.getHealth(HealthEndpointSupport.java:74)
	at org.springframework.boot.actuate.health.HealthEndpointSupport.getHealth(HealthEndpointSupport.java:61)
	at org.springframework.boot.actuate.health.HealthEndpoint.health(HealthEndpoint.java:65)
	at org.springframework.boot.actuate.health.HealthEndpoint.health(HealthEndpoint.java:55)
	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:498)
	at org.springframework.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:282)
	at org.springframework.boot.actuate.endpoint.invoke.reflect.ReflectiveOperationInvoker.invoke(ReflectiveOperationInvoker.java:77)
	at org.springframework.boot.actuate.endpoint.annotation.AbstractDiscoveredOperation.invoke(AbstractDiscoveredOperation.java:60)
	at org.springframework.boot.actuate.endpoint.jmx.EndpointMBean.invoke(EndpointMBean.java:121)
	at org.springframework.boot.actuate.endpoint.jmx.EndpointMBean.invoke(EndpointMBean.java:96)
	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)
	at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
	at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1468)
	at javax.management.remote.rmi.RMIConnectionImpl.access$300(RMIConnectionImpl.java:76)
	at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1309)
	at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1401)
	at javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:829)
	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:498)
	at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:361)
	at sun.rmi.transport.Transport$1.run(Transport.java:200)
	at sun.rmi.transport.Transport$1.run(Transport.java:197)
	at java.security.AccessController.doPrivileged(Native Method)
	at sun.rmi.transport.Transport.serviceCall(Transport.java:196)
	at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:568)
	at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:826)
	at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:683)
	at java.security.AccessController.doPrivileged(Native Method)
	at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:682)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
Caused by: java.sql.SQLFeatureNotSupportedException: isValid
	at org.apache.shardingsphere.shardingjdbc.jdbc.unsupported.AbstractUnsupportedOperationConnection.isValid(AbstractUnsupportedOperationConnection.java:157)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.jdbc.core.JdbcTemplate$CloseSuppressingInvocationHandler.invoke(JdbcTemplate.java:1525)
	at com.sun.proxy.$Proxy186.isValid(Unknown Source)
	at org.springframework.boot.actuate.jdbc.DataSourceHealthIndicator.isConnectionValid(DataSourceHealthIndicator.java:134)
	at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:328)
	... 47 common frames omitted

通过查看源码以及 debugger 发现 DataSourceHealthIndicator.query 为空

解决办法

import org.springframework.beans.factory.ObjectProvider;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.actuate.autoconfigure.jdbc.DataSourceHealthContributorAutoConfiguration;
import org.springframework.boot.actuate.health.AbstractHealthIndicator;
import org.springframework.boot.actuate.jdbc.DataSourceHealthIndicator;
import org.springframework.boot.jdbc.metadata.DataSourcePoolMetadataProvider;
import org.springframework.context.annotation.Configuration;
import org.springframework.util.StringUtils;

import javax.sql.DataSource;
import java.util.Map;

@Configuration
public class DataSourceHealthConfig extends DataSourceHealthContributorAutoConfiguration {

    @Value("${spring.datasource.dbcp2.validation-query:select 1}")
    private String defaultQuery;


    public DataSourceHealthConfig(Map dataSources, ObjectProvider metadataProviders) {
        super(dataSources, metadataProviders);
    }

    @Override
    protected AbstractHealthIndicator createIndicator(DataSource source) {
        DataSourceHealthIndicator indicator = (DataSourceHealthIndicator) super.createIndicator(source);
        if (!StringUtils.hasText(indicator.getQuery())) {
            indicator.setQuery(defaultQuery);
        }
        return indicator;
    }
}