将许多骆驼组件组合成一个自定义组件

Question

我想创建一个新的骆驼组件MyComponent，它是不同组件的组合：

例如，而不是指定多个端点：

from("file:c:/in")...to...

from("ftp:...")...to...

我想要一个可以检测到正确端点的MyComponent：

from("myComponent:..")...to...

以便无论文件来自from("file")、from("sftp")、from("stream") 等...

作为一个适配器吃器，我们有一个文件作为入口或 ftp ..

如何做到这一点？

Answer 1

您真的需要骆驼组件还是可以使用自定义路由构建器来实现？这里只是展示一般想法的原始示例：

自定义路由构建器类而不是组件：

import org.apache.camel.Endpoint;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.component.file.FileEndpoint;
import org.apache.camel.component.file.remote.FtpConfiguration;
import org.apache.camel.component.file.remote.FtpEndpoint;

class MyFileReader extends RouteBuilder {
    private String name;
    private String dir;
    private String mask;
    private String ftpHost;
    private int ftpPort;
    private String ftpUser;
    private String ftpPass;
    private boolean ftpMode;

    public MyFileReader(String name, String dir, String mask) {
        this.name = name;
        this.dir = dir;
        this.mask = mask;
        this.ftpMode = false;
    }

    public MyFileReader(String name, String dir, String mask, String ftpHost, int ftpPort, String ftpUser, String ftpPass) {
        this.name = name;
        this.dir = dir;
        this.mask = mask;
        this.ftpHost = ftpHost;
        this.ftpPort = ftpPort;
        this.ftpUser = ftpUser;
        this.ftpPass = ftpPass;
        this.ftpMode = true;
    }

    @Override
    public void configure() throws Exception {
        from(initFromEndpoint()).to("direct:" +name + "_out");
    }

    private Endpoint initFromEndpoint() {
        if (ftpMode) {
            FtpEndpoint endpoint = new FtpEndpoint();
            FtpConfiguration configuration = endpoint.getConfiguration();
            configuration.setHost(ftpHost);
            configuration.setPort(ftpPort);
            configuration.setUsername(ftpUser);
            configuration.setPassword(ftpPass);
            configuration.setDirectory(dir);
            endpoint.setInclude(mask);
            return endpoint;
        } else {
            FileEndpoint endpoint = new FileEndpoint();
            endpoint.getConfiguration().setDirectory(dir);
            endpoint.setInclude(mask);
            return endpoint;
        }
    }
}

来自 Spring xml 的使用示例：

<?xml version="1.0" encoding="UTF-8"?>
<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="fileReader" class="MyFileReader">
        <constructor-arg name="name" value="myFileReader" />
        <constructor-arg name="dir" value="/myfiles" />
        <constructor-arg name="mask" value="*.txt" />
    </bean>


    <bean id="ftpReader" class="MyFileReader">
        <constructor-arg name="name" value="myFtpReader" />
        <constructor-arg name="dir" value="/myftpfiles" />
        <constructor-arg name="mask" value="*.txt" />
        <constructor-arg name="ftpHost" value="127.0.0.1" />
        <constructor-arg name="ftpPort" value="1234" />
        <constructor-arg name="ftpUser" value="myuser" />
        <constructor-arg name="ftpPass" value="mypass" />
    </bean>

    <camelContext xmlns="http://camel.apache.org/schema/spring" id="integration-schedule" useMDCLogging="true">
        <routeBuilder ref="fileReader" />
        <routeBuilder ref="ftpReader" />

        <route id="fileRoute">
            <from uri="direct:fileReader_out" />
            <log message="Do something with files" />
        </route>

        <route id="ftpRoute">
            <from uri="direct:ftpReader_out" />
            <log message="Do something with ftp files" />
        </route>
    </camelContext>
</beans>