为 Apache Camel 配置数据源

Posted 2023-02-26

【中文标题】为 Apache Camel 配置数据源

【英文标题】：Configuring datasource for Apache Camel

【发布时间】：2018-11-16 20:50:53

【问题描述】：

我在 application.properties 文件中定义了一个数据源：

spring.datasource.url = jdbc:mysql://localhost:3306/world?useSSL=false
spring.datasource.username = root
spring.datasource.password = password

但是，当我尝试运行我的 camelroute 时，我收到此错误：“在注册表中找不到 bean：类型的数据源：javax.sql.DataSource”。我总是在 spring 中使用 application.properties 文件配置我的数据源，没有问题。

完整的错误日志：

org.apache.camel.RuntimeCamelException: org.apache.camel.FailedToCreateRouteException: Failed to create route route5 at: >>> To[jdbc:datasource] <<< in route: Route(route5)[[From[bean:sqlBean?method=generateSqlQuery('ci... because of Failed to resolve endpoint: jdbc://datasource due to: No bean could be found in the registry for: datasource of type: javax.sql.DataSource
    at org.apache.camel.util.ObjectHelper.wrapRuntimeCamelException(ObjectHelper.java:1830) ~[camel-core-2.21.1.jar:2.21.1]
    at org.apache.camel.spring.SpringCamelContext.start(SpringCamelContext.java:136) ~[camel-spring-2.21.1.jar:2.21.1]
    at org.apache.camel.spring.SpringCamelContext.onApplicationEvent(SpringCamelContext.java:174) ~[camel-spring-2.21.1.jar:2.21.1]
    at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172) ~[spring-context-4.3.17.RELEASE.jar:4.3.17.RELEASE]
    at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165) ~[spring-context-4.3.17.RELEASE.jar:4.3.17.RELEASE]
    at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139) ~[spring-context-4.3.17.RELEASE.jar:4.3.17.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:393) ~[spring-context-4.3.17.RELEASE.jar:4.3.17.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:347) ~[spring-context-4.3.17.RELEASE.jar:4.3.17.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:883) ~[spring-context-4.3.17.RELEASE.jar:4.3.17.RELEASE]
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.finishRefresh(EmbeddedWebApplicationContext.java:144) ~[spring-boot-1.5.13.RELEASE.jar:1.5.13.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:546) ~[spring-context-4.3.17.RELEASE.jar:4.3.17.RELEASE]
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.5.13.RELEASE.jar:1.5.13.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693) [spring-boot-1.5.13.RELEASE.jar:1.5.13.RELEASE]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360) [spring-boot-1.5.13.RELEASE.jar:1.5.13.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) [spring-boot-1.5.13.RELEASE.jar:1.5.13.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118) [spring-boot-1.5.13.RELEASE.jar:1.5.13.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107) [spring-boot-1.5.13.RELEASE.jar:1.5.13.RELEASE]
    at com.example.SpringApacheDemoApplication.main(SpringApacheDemoApplication.java:15) [classes/:na]
Caused by: org.apache.camel.FailedToCreateRouteException: Failed to create route route5 at: >>> To[jdbc:datasource] <<< in route: Route(route5)[[From[bean:sqlBean?method=generateSqlQuery('ci... because of Failed to resolve endpoint: jdbc://datasource due to: No bean could be found in the registry for: datasource of type: javax.sql.DataSource
    at org.apache.camel.model.RouteDefinition.addRoutes(RouteDefinition.java:1303) ~[camel-core-2.21.1.jar:2.21.1]
    at org.apache.camel.model.RouteDefinition.addRoutes(RouteDefinition.java:204) ~[camel-core-2.21.1.jar:2.21.1]
    at org.apache.camel.impl.DefaultCamelContext.startRoute(DefaultCamelContext.java:1145) ~[camel-core-2.21.1.jar:2.21.1]
    at org.apache.camel.impl.DefaultCamelContext.startRouteDefinitions(DefaultCamelContext.java:3731) ~[camel-core-2.21.1.jar:2.21.1]
    at org.apache.camel.impl.DefaultCamelContext.doStartCamel(DefaultCamelContext.java:3445) ~[camel-core-2.21.1.jar:2.21.1]
    at org.apache.camel.impl.DefaultCamelContext.access$000(DefaultCamelContext.java:209) ~[camel-core-2.21.1.jar:2.21.1]
    at org.apache.camel.impl.DefaultCamelContext$2.call(DefaultCamelContext.java:3253) ~[camel-core-2.21.1.jar:2.21.1]
    at org.apache.camel.impl.DefaultCamelContext$2.call(DefaultCamelContext.java:3249) ~[camel-core-2.21.1.jar:2.21.1]
    at org.apache.camel.impl.DefaultCamelContext.doWithDefinedClassLoader(DefaultCamelContext.java:3272) ~[camel-core-2.21.1.jar:2.21.1]
    at org.apache.camel.impl.DefaultCamelContext.doStart(DefaultCamelContext.java:3249) ~[camel-core-2.21.1.jar:2.21.1]
    at org.apache.camel.support.ServiceSupport.start(ServiceSupport.java:61) ~[camel-core-2.21.1.jar:2.21.1]
    at org.apache.camel.impl.DefaultCamelContext.start(DefaultCamelContext.java:3165) ~[camel-core-2.21.1.jar:2.21.1]
    at org.apache.camel.spring.SpringCamelContext.start(SpringCamelContext.java:133) ~[camel-spring-2.21.1.jar:2.21.1]
    ... 16 common frames omitted
Caused by: org.apache.camel.ResolveEndpointFailedException: Failed to resolve endpoint: jdbc://datasource due to: No bean could be found in the registry for: datasource of type: javax.sql.DataSource
    at org.apache.camel.impl.DefaultCamelContext.getEndpoint(DefaultCamelContext.java:758) ~[camel-core-2.21.1.jar:2.21.1]
    at org.apache.camel.util.CamelContextHelper.getMandatoryEndpoint(CamelContextHelper.java:80) ~[camel-core-2.21.1.jar:2.21.1]
    at org.apache.camel.model.RouteDefinition.resolveEndpoint(RouteDefinition.java:219) ~[camel-core-2.21.1.jar:2.21.1]
    at org.apache.camel.impl.DefaultRouteContext.resolveEndpoint(DefaultRouteContext.java:115) ~[camel-core-2.21.1.jar:2.21.1]
    at org.apache.camel.impl.DefaultRouteContext.resolveEndpoint(DefaultRouteContext.java:121) ~[camel-core-2.21.1.jar:2.21.1]
    at org.apache.camel.model.SendDefinition.resolveEndpoint(SendDefinition.java:62) ~[camel-core-2.21.1.jar:2.21.1]
    at org.apache.camel.model.SendDefinition.createProcessor(SendDefinition.java:56) ~[camel-core-2.21.1.jar:2.21.1]
    at org.apache.camel.model.ProcessorDefinition.makeProcessorImpl(ProcessorDefinition.java:562) ~[camel-core-2.21.1.jar:2.21.1]
    at org.apache.camel.model.ProcessorDefinition.makeProcessor(ProcessorDefinition.java:523) ~[camel-core-2.21.1.jar:2.21.1]
    at org.apache.camel.model.ProcessorDefinition.addRoutes(ProcessorDefinition.java:239) ~[camel-core-2.21.1.jar:2.21.1]
    at org.apache.camel.model.RouteDefinition.addRoutes(RouteDefinition.java:1300) ~[camel-core-2.21.1.jar:2.21.1]
    ... 28 common frames omitted
Caused by: org.apache.camel.NoSuchBeanException: No bean could be found in the registry for: datasource of type: javax.sql.DataSource
    at org.apache.camel.util.CamelContextHelper.mandatoryLookup(CamelContextHelper.java:189) ~[camel-core-2.21.1.jar:2.21.1]
    at org.apache.camel.component.jdbc.JdbcComponent.createEndpoint(JdbcComponent.java:52) ~[camel-jdbc-2.21.1.jar:2.21.1]
    at org.apache.camel.impl.DefaultComponent.createEndpoint(DefaultComponent.java:126) ~[camel-core-2.21.1.jar:2.21.1]
    at org.apache.camel.impl.DefaultCamelContext.getEndpoint(DefaultCamelContext.java:711) ~[camel-core-2.21.1.jar:2.21.1]
    ... 38 common frames omitted

我的骆驼路线：

from("bean:sqlBean?method=generateSqlQuery('tablename')")
.to("jdbc:datasource")
.process( new Processor () 

    @Override
    public void process(Exchange exchange) throws Exception 
        exchange.getOut().toString();

    );

---

编辑：我像这样以编程方式添加了数据源：

@Bean
@Primary
public DataSource datasource() 

    System.out.println("hihihi");
    return DataSourceBuilder
        .create()
        .username("root")
        .password("password")
        .url("jdbc:mysql://localhost:3306/world?useSSL=false")
        .driverClassName("com.mysql.jdbc.Driver")
        .build();

但是，现在我遇到了另一个错误：

Caused by: java.lang.UnsupportedOperationException: You cannot consume from a bean endpoint
    at org.apache.camel.component.bean.BeanEndpoint.createConsumer(BeanEndpoint.java:75) ~[camel-core-2.21.1.jar:2.21.1]
    at org.apache.camel.impl.EventDrivenConsumerRoute.addServices(EventDrivenConsumerRoute.java:69) ~[camel-core-2.21.1.jar:2.21.1]
    at org.apache.camel.impl.DefaultRoute.onStartingServices(DefaultRoute.java:103) ~[camel-core-2.21.1.jar:2.21.1]
    at org.apache.camel.impl.RouteService.doWarmUp(RouteService.java:172) ~[camel-core-2.21.1.jar:2.21.1]
    at org.apache.camel.impl.RouteService.warmUp(RouteService.java:145) ~[camel-core-2.21.1.jar:2.21.1]
    ... 28 common frames omitted

【问题讨论】：

Configure DataSource programmatically in Spring Boot的可能重复

【参考方案1】：

我想您正在使用 Spring Boot。也许“数据源”不是 Spring Boot 给出的名称？一个选项是检查 Spring Boot 加载的所有 bean 的名称。更多信息：Print all the Spring beans that are loaded - Spring Boot

另一个早期选项是以编程方式配置您的数据源并设置所需的名称。更多信息：Configure DataSource programmatically in Spring Boot

希望对你有帮助。

---

对于新的错误，你可以使用直接组件，例如：

from("direct:start")
.to("bean:sqlBean?method=generateSqlQuery('tablename')")
.to("jdbc:datasource")
.process( new Processor () 

    @Override
    public void process(Exchange exchange) throws Exception 
        exchange.getOut().toString();

    );

【讨论】：

我也不同意投反对票。我提出了一个与此相关的问题，与后来 Makoto 提出的相同。

我遵循了你的建议，包括在控制台中打印 bean 名称的建议，现在我可以看到确实有一个名称为“datasource”的 bean，但我遇到了另一个错误, “不能从 bean 端点消费”。

感谢您的免责声明。错误是告诉您 bean 端点不能定义为路由的输入，例如，您应该使用 from 中的直接组件，然后调用您的 bean 端点。更多信息和示例在这里：camel.apache.org/bean.html

【参考方案2】：

由于您使用的是 Apache Camel，因此您需要像这样定义一个数据源 bean

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="
       http://www.springframework.org/schema/beans 
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://camel.apache.org/schema/spring 
       http://camel.apache.org/schema/spring/camel-spring.xsd">


    <bean id="sqlComponent" class="org.apache.camel.component.sql.SqlComponent">
        <property name="dataSource" ref="dataSource" />
    </bean>

</beans>

您的 application.properties 文件应配置如下

spring.datasource.url=#use your url here 
spring.datasource.username=TEST
spring.datasource.password=TEST
spring.datasource.driver-class-name=oracle.jdbc.OracleDriver #give your own driver-class name
spring.datasource.testWhileIdle=true
spring.datasource.validationQuery=SELECT 1
spring.jpa.show-sql=true

【讨论】：

我可以知道投反对票的原因吗，因为我也在使用 Apache Camel 和 Spring Boot，并且配置方式相同，它对我有用

谢谢，没问题！尝试在 @SpringBootApplication 注释下方添加 @EnableAutoConfiguration

【参考方案3】：

我来到这里是因为我正在研究一个类似的问题，我们正在将基于 xml 的骆驼代码迁移到 Springboot 和 Java 配置。通过执行以下操作，我能够自动配置数据源：

添加依赖spring-boot-starter-jdbc

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>

版本取决于您使用的 Springboot 版本。

在您的 application.properties 文件中配置以下内容

spring.datasource.driver-class-name = <driverName>
spring.datasource.url = <url>
spring.datasource.username = <username>
spring.datasource.password = <password>

按照上述步骤，Springboot 将为您自动配置 dataSource bean。

这是我尝试运行存储过程的示例骆驼路线：

from("timer://mytimer?fixedRate=true&period=10s")
           .log("TESTING")
           .setBody(constant("EXEC SP_Manuals @DocumentRef = 'xyz1234' , @Year = '2019'"))
           .to("jdbc:dataSource")

“dataSource”是 Springboot 创建的 DataSource bean。

如果你使用 to("jdbc:datasource") 你会得到下面的异常。

Caused by: org.apache.camel.NoSuchBeanException: No bean could be found in the registry for: datasource of type: javax.sql.DataSource

只是附加信息，如果忘记包含 camel-jdbc 依赖项，您将得到以下异常：

Caused by: org.apache.camel.ResolveEndpointFailedException: Failed to resolve endpoint: jdbc://dataSource due to: No component found with scheme: jdbc

所以请确保你的 pom.xml 中有 camel-jdbc 依赖项

<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-jdbc</artifactId>
</dependency>