我正在尝试从文件中读取数据并使用apache camel写入rabbitmq队列,但最终会出现错误
Exception in thread "main" org.apache.camel.FailedToCreateRouteException: Failed to create route route1 at: >>> To[rabbitmq://localhost:15672?queue=hello] <<< in route: Route(route1)[[From[file://target/?fileName=doctor.txt&chars... because of Failed to resolve endpoint: rabbitmq://localhost:15672?queue=hello due to: No URI path as the exchangeName for the RabbitMQEndpoint, the URI is rabbitmq://localhost:15672?queue=hello
at org.apache.camel.model.RouteDefinition.addRoutes(RouteDefinition.java:945)
at org.apache.camel.model.RouteDefinition.addRoutes(RouteDefinition.java:187)
at org.apache.camel.impl.DefaultCamelContext.startRoute(DefaultCamelContext.java:794)
at org.apache.camel.impl.DefaultCamelContext.startRouteDefinitions(DefaultCamelContext.java:2184)
at org.apache.camel.impl.DefaultCamelContext.doStartCamel(DefaultCamelContext.java:1916)
at org.apache.camel.impl.DefaultCamelContext.doStart(DefaultCamelContext.java:1777)
at org.apache.camel.support.ServiceSupport.start(ServiceSupport.java:61)
at org.apache.camel.impl.DefaultCamelContext.start(DefaultCamelContext.java:1745)
at test.RMQCamelSender.main(RMQCamelSender.java:38)
Caused by: org.apache.camel.ResolveEndpointFailedException: Failed to resolve endpoint: rabbitmq://localhost:15672?queue=hello due to: No URI path as the exchangeName for the RabbitMQEndpoint, the URI is rabbitmq://localhost:15672?queue=hello
at org.apache.camel.impl.DefaultCamelContext.getEndpoint(DefaultCamelContext.java:545)
at org.apache.camel.util.CamelContextHelper.getMandatoryEndpoint(CamelContextHelper.java:71)
at org.apache.camel.model.RouteDefinition.resolveEndpoint(RouteDefinition.java:202)
at org.apache.camel.impl.DefaultRouteContext.resolveEndpoint(DefaultRouteContext.java:106)
at org.apache.camel.impl.DefaultRouteContext.resolveEndpoint(DefaultRouteContext.java:112)
at org.apache.camel.model.SendDefinition.resolveEndpoint(SendDefinition.java:61)
at org.apache.camel.model.SendDefinition.createProcessor(SendDefinition.java:55)
at org.apache.camel.model.ProcessorDefinition.makeProcessor(ProcessorDefinition.java:500)
at org.apache.camel.model.ProcessorDefinition.addRoutes(ProcessorDefinition.java:213)
at org.apache.camel.model.RouteDefinition.addRoutes(RouteDefinition.java:942)
... 8 more
Caused by: java.lang.IllegalArgumentException: No URI path as the exchangeName for the RabbitMQEndpoint, the URI is rabbitmq://localhost:15672?queue=hello
at org.apache.camel.component.rabbitmq.RabbitMQComponent.createEndpoint(RabbitMQComponent.java:50)
at org.apache.camel.component.rabbitmq.RabbitMQComponent.createEndpoint(RabbitMQComponent.java:31)
at org.apache.camel.impl.DefaultComponent.createEndpoint(DefaultComponent.java:122)
at org.apache.camel.impl.DefaultCamelContext.getEndpoint(DefaultCamelContext.java:525)
... 17 more
以下是我创建驼峰上下文和rabbitmq队列的类的实现 .
RMQCamleSender.java
package test;
import org.apache.camel.CamelContext;
import org.apache.camel.Exchange;
import org.apache.camel.Processor;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.impl.DefaultCamelContext;
import test.Producer;
public class RMQCamelSender {
public static void main(String[] argv) throws Exception {
Producer queueProd = new Producer();
queueProd.setupConnection();
System.out.println(queueProd.toString());
CamelContext context = new DefaultCamelContext();
context.addRoutes(new RouteBuilder() {
public void configure() throws Exception {
System.out.println("hello world");
from("file://target/?fileName=doctor.txt&charset=utf-8")
.process(new Processor() {
public void process(Exchange msg) throws Exception {
System.out.println(msg.getIn().getBody(
String.class));
}
}).to("rabbitmq://localhost:15672?queue=hello");
}
});
context.start();
Thread.sleep(4000);
context.stop();
}
}
Producer.java
package test;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
import com.rabbitmq.client.ConnectionFactory;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.Channel;
public class Producer {
public static final String QUEUE_NAME = "hello";
public static Connection connection;
public void setupConnection() throws IOException, TimeoutException {
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("localhost");
connection = factory.newConnection();
Channel channel = connection.createChannel();
channel.queueDeclare(QUEUE_NAME, false, false, false, null);
}
}
如果我不使用Camel并尝试使用标准rabbitmq库联系队列,该程序正常工作 .
2 回答
错误消息非常具有说明性:您缺少 endpoints URI中的交换名称,它不能为空,因为the official Camel documentation表示必须遵循给定的格式:
我建议您尝试使用
amq.direct
交换(有关详细信息,请参阅official RabbitMQ documentation),如下所示:此外,您正在使用
15672
端口,默认情况下,RabbitMQ的端口's web management console, I guess you haven' t更改了默认设置,因此端口需要为5672
. 您还必须使用routingKey
参数而不是queue
参数,因为在RabbitMQ语义中,您发布到exchange:routingKey
并且仅从队列中消耗 .您需要包含rabbitmq交换名称 . 它在这里不见了;
它应该是这样的:
此外,如果您要发送到Exchange,为什么要指定队列?您只需要指定路由密钥,如果存在该路由密钥的绑定,交换将发送到该队列 .