我正在尝试从camel 3.x迁移到camel 4.x版本,因此我需要从rabbitmq
组件迁移到替换的spring-rabbitmq
组件。在rabbitmq
组件中,我使用declare
选项让Camel自动创建和绑定队列和交换,现在我在spring-rabbitmq
组件中寻找等效选项:
从文档来看,这似乎是可能的:网址:https://camel.apache.org/components/3.20.x/spring-rabbitmq-component.html#_auto_declare_exchanges_queues_and_bindings
在您可以从RabbitMQ发送或接收消息之前,必须首先设置交换、队列和绑定。
在开发模式中,可能需要让Camel automatic执行此操作。您可以通过在SpringRabbitMQComponent上设置autoDeclare=true来启用此功能。
然后SpringRabbitMQ将自动声明必要的元素,并建立交换、队列和路由键之间的绑定。
因此,我在application.properties
中将camel.component.spring-rabbitmq.auto-declare
属性配置为true
:但这似乎只影响RabbitMQ使用者端点,而不影响生成者。
使用以下简单的方法:
<route id="receive-send-rabbitmq">
<from uri="spring-rabbitmq:in-exchange?queues=queue-in"/>
<log message="message received" />
<to uri="spring-rabbitmq:out-exchange"/>
</route>
字符串
当启动路由时,Camel会正确地自动声明in-exchange
和queue-in
对象,并正确地接收消息。但由于交换out-exchange
不可用,发送部分出现故障。堆栈跟踪:
2023-07-10T11:54:12.094+02:00 DEBUG 3796 --- [pool-2-thread-5] o.s.amqp.rabbit.core.RabbitTemplate : Publishing message [(Body:'[B@149e60f3(byte[3])' MessageProperties [headers={}, contentType=application/octet-stream, contentLength=3, deliveryMode=PERSISTENT, priority=0, deliveryTag=0])] on exchange [out-exchange], routingKey = []
2023-07-10T11:54:12.099+02:00 INFO 3796 --- [ 127.0.0.1:5672] com.rabbitmq.client.impl.AMQConnection : Received a frame on an unknown channel, ignoring it
2023-07-10T11:54:12.099+02:00 DEBUG 3796 --- [pool-2-thread-5] o.s.amqp.rabbit.connection.RabbitUtils : Unexpected exception on closing RabbitMQ Channel
com.rabbitmq.client.ShutdownSignalException: channel error; protocol method: #method<channel.close>(reply-code=404, reply-text=NOT_FOUND - no exchange 'out-exchange' in vhost '/', class-id=60, method-id=40)
at com.rabbitmq.utility.ValueOrException.getValue(ValueOrException.java:66)
at com.rabbitmq.utility.BlockingValueOrException.uninterruptibleGetValue(BlockingValueOrException.java:36)
at com.rabbitmq.client.impl.AMQChannel$BlockingRpcContinuation.getReply(AMQChannel.java:502)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:833)
Caused by: com.rabbitmq.client.ShutdownSignalException: channel error; protocol method: #method<channel.close>(reply-code=404, reply-text=NOT_FOUND - no exchange 'out-exchange' in vhost '/', class-id=60, method-id=40)
at com.rabbitmq.client.impl.ChannelN.asyncShutdown(ChannelN.java:517)
at com.rabbitmq.client.impl.ChannelN.processAsync(ChannelN.java:341)
at com.rabbitmq.client.impl.AMQChannel.handleCompleteInboundCommand(AMQChannel.java:182)
at com.rabbitmq.client.impl.AMQChannel.handleFrame(AMQChannel.java:114)
at com.rabbitmq.client.impl.AMQConnection.readFrame(AMQConnection.java:743)
at com.rabbitmq.client.impl.AMQConnection.access$300(AMQConnection.java:47)
at com.rabbitmq.client.impl.AMQConnection$MainLoop.run(AMQConnection.java:670)
... 1 common frames omitted
型
我知道我可以使用RabbitAdmin声明这些交换,但我不想在我的应用程序代码中手动处理这些,路由作为XML文件在专用文件夹中提供,由应用程序在启动时动态加载。
将Camel 4.0.0-rc 1与Springboot 3.1.1配合使用
1条答案
按热度按时间eulz3vhy1#
仅仅因为此组件选项仅适用于文档中明确说明的消费者端点,我引用如下:
指定consumer是否在启动时自动声明exchange、queue和routing key之间的绑定。启用这一点对开发很有好处,可以使代理上的交换、队列和绑定变得容易。
对于生产者端点,您需要通过将
Queue
声明为常规bean来手动创建它,Spring将自动为您创建Queue。字符串
如需详细信息,请参阅this answer。