升级Apache Camel 2到3：解决Main类变更与拥抱现代配置

<dependency>
    <groupId>org.apache.camel</groupId>
    <artifactId>camel-spring-main</artifactId>
    <version>3.14.6</version> <!-- 请替换为你的Camel版本，需与项目兼容 -->
</dependency>

import org.apache.camel.spring.Main;

public class MyCamelApplication {

    public static void main(String[] args) throws Exception {
        Main main = new Main();
        // 设置Spring XML配置文件路径
        main.setApplicationContextUri("camel-context.xml");
        // 启动Camel
        main.run();
    }
}

import org.apache.camel.builder.RouteBuilder;
import org.springframework.stereotype.Component;

@Component
public class MySimpleRoute extends RouteBuilder {

    @Override
    public void configure() throws Exception {
        from("timer:hello?period=5000") // 每5秒触发一次
            .log("Hello from Camel 3 with Java DSL!")
            .to("log:mylogger");
    }
}

<dependency>
    <groupId>org.apache.camel.springboot</groupId>
    <artifactId>camel-spring-boot-starter</artifactId>
    <version>3.14.6</version> <!-- 请替换为你的Camel版本，需与项目兼容 -->
</dependency>

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class CamelSpringBootApplication {

    public static void main(String[] args) {
        SpringApplication.run(CamelSpringBootApplication.class, args);
    }
}

# application.properties
camel.component.sql.datasource.ref=dataSource
my.query.config.location=lib/queries.properties

import org.apache.camel.builder.RouteBuilder;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

@Component
public class MyConfigurableRoute extends RouteBuilder {

    @Value("${my.query.config.location}")
    private String queriesConfigLocation;

    @Override
    public void configure() throws Exception {
        // 示例：如何使用外部配置
        log.info("Queries config location: " + queriesConfigLocation);

        // 假设你有一个SQL组件，并希望通过Spring Bean配置DataSource
        // 在Spring Boot中，你可以直接定义一个DataSource Bean，Camel会自动发现
        // from("sql:{{my.sql.query}}?dataSource=#dataSource")
        // ...
    }
}

import org.apache.camel.component.sql.SqlComponent;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import javax.sql.DataSource; // 假设你已经定义了一个DataSource Bean

@Configuration
public class CamelComponentConfig {

    @Bean(name = "sqlComponent")
    public SqlComponent sqlComponent(DataSource dataSource) {
        SqlComponent sqlComponent = new SqlComponent();
        sqlComponent.setDataSource(dataSource);
        return sqlComponent;
    }

    @Bean(name = "bean1")
    public com.foo.OurThing bean1() {
        return new com.foo.OurThing();
    }

    @Bean(name = "bean2")
    public com.bar.OtherThing bean2() {
        return new com.bar.OtherThing();
    }
}