当我通过控制台创建ActiveMQ队列时，它已经具有预定义的属性值。
例如：
Max message size 3301921
Min message size 1091
类似地，当我在客户端代码中创建队列时：
...
ConnectionFactory connFactory =
new ActiveMQConnectionFactory(username, password, activeMqBrokerUri);
ActiveMQSession session =
(ActiveMQSession) connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
MessageProducer msgProducer = session.createProducer(session.createQueue(queueName));
...
我有一个简单的骆驼路线，该路线从队列中获取序列化的文件并将其发送到一些外部资源：
public class MyRouteBuilder extends RouteBuilder {
@Override
public void configure() throws Exception {
from("activemq:alfresco-queue")
.process(new Processor() {
public void process(Exchange exchange) throws Exception {
MultipartEntityBuilder multipartEntityBuilder = MultipartEntityBuilder.create();
multipartEntityBuilder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
multipartEntityBuilder.addPart("file", new ByteArrayBody(exchange.getIn().getBody(byte[].class),
exchange.getIn().getHeader("fileName", String.class)));
exchange.getIn().setBody(multipartEntityBuilder.build().getContent());
}
})
.setHeader(Exchange.HTTP_METHOD, constant(org.apache.camel.component.http4.HttpMethods.POST))
.to("http4://vm-alfce5-31.....com:8080/alfresco/s/someco/queuefileuploader?guest=true")
.process(new Processor() {
public void process(Exchange exchange) throws Exception {
System.out.println("The response code is: " +
exchange.getIn().getHeader(Exchange.HTTP_RESPONSE_CODE));
}
});
}
}
我的OSGi捆绑软件在JBoss FUSE ESB中运行。
当我发送的文件大小超过预定义的最大大小时，出现以下错误：
Failed delivery for (MessageId: ID:63-DP-TAV-51262-1531978204588-1:1:1:1:1
on ExchangeId: ID-63-DP-TAV-64708-1531973651576-0-3).
Exhausted after delivery attempt:
1 caught: org.apache.http.ContentTooLongException:
Content length is too long: 3301060
堆栈跟踪如下所示：
org.apache.http.ContentTooLongException: Content length is too long: 3301060
at org.apache.http.entity.mime.MultipartFormEntity.getContent(MultipartFormEntity.java:103)[commons-codec:commons-codec:1.9 org.apache.httpcomponents:fluent-hc:4.5.2 org.apache.httpcomponents:httpclient-cache:4.5.2 org.apache.httpcomponents:httpclient-osgi:4.5.2 org.apache.httpcomponents:httpclient:4.5.2 org.apache.httpcomponents:httpmime:4.5.2]
at org.fusesource.example.MyRouteBuilder$2.process(MyRouteBuilder.java:37)[org.fusesource.example:camel-basic:1.0-SNAPSHOT]
at org.apache.camel.processor.DelegateSyncProcessor.process(DelegateSyncProcessor.java:63)[org.apache.camel:camel-core:2.17.0.redhat-630187 com.googlecode.concurrentlinkedhashmap:concurrentlinkedhashmap-lru:1.4.2]
at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:77)[org.apache.camel:camel-core:2.17.0.redhat-630187 com.googlecode.concurrentlinkedhashmap:concurrentlinkedhashmap-lru:1.4.2]
at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:468)[org.apache.camel:camel-core:2.17.0.redhat-630187 com.googlecode.concurrentlinkedhashmap:concurrentlinkedhashmap-lru:1.4.2]
at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:196)[org.apache.camel:camel-core:2.17.0.redhat-630187 com.googlecode.concurrentlinkedhashmap:concurrentlinkedhashmap-lru:1.4.2]
at org.apache.camel.processor.Pipeline.process(Pipeline.java:121)[org.apache.camel:camel-core:2.17.0.redhat-630187 com.googlecode.concurrentlinkedhashmap:concurrentlinkedhashmap-lru:1.4.2]
at org.apache.camel.processor.Pipeline.process(Pipeline.java:83)[org.apache.camel:camel-core:2.17.0.redhat-630187 com.googlecode.concurrentlinkedhashmap:concurrentlinkedhashmap-lru:1.4.2]
at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:196)[org.apache.camel:camel-core:2.17.0.redhat-630187 com.googlecode.concurrentlinkedhashmap:concurrentlinkedhashmap-lru:1.4.2]
at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:109)[org.apache.camel:camel-core:2.17.0.redhat-630187 com.googlecode.concurrentlinkedhashmap:concurrentlinkedhashmap-lru:1.4.2]
at org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:91)[org.apache.camel:camel-core:2.17.0.redhat-630187 com.googlecode.concurrentlinkedhashmap:concurrentlinkedhashmap-lru:1.4.2]
at org.apache.camel.component.jms.EndpointMessageListener.onMessage(EndpointMessageListener.java:112)[org.apache.camel:camel-jms:2.17.0.redhat-630187]
at org.springframework.jms.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:555)[org.apache.servicemix.bundles:org.apache.servicemix.bundles.spring-jms:3.2.16.RELEASE_2]
at org.springframework.jms.listener.AbstractMessageListenerContainer.invokeListener(AbstractMessageListenerContainer.java:515)[org.apache.servicemix.bundles:org.apache.servicemix.bundles.spring-jms:3.2.16.RELEASE_2]
at org.springframework.jms.listener.AbstractMessageListenerContainer.doExecuteListener(AbstractMessageListenerContainer.java:485)[org.apache.servicemix.bundles:org.apache.servicemix.bundles.spring-jms:3.2.16.RELEASE_2]
at org.springframework.jms.listener.AbstractPollingMessageListenerContainer.doReceiveAndExecute(AbstractPollingMessageListenerContainer.java:325)[org.apache.servicemix.bundles:org.apache.servicemix.bundles.spring-jms:3.2.16.RELEASE_2]
at org.springframework.jms.listener.AbstractPollingMessageListenerContainer.receiveAndExecute(AbstractPollingMessageListenerContainer.java:263)[org.apache.servicemix.bundles:org.apache.servicemix.bundles.spring-jms:3.2.16.RELEASE_2]
at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.invokeListener(DefaultMessageListenerContainer.java:1103)[org.apache.servicemix.bundles:org.apache.servicemix.bundles.spring-jms:3.2.16.RELEASE_2]
at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.executeOngoingLoop(DefaultMessageListenerContainer.java:1095)[org.apache.servicemix.bundles:org.apache.servicemix.bundles.spring-jms:3.2.16.RELEASE_2]
at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.run(DefaultMessageListenerContainer.java:992)[org.apache.servicemix.bundles:org.apache.servicemix.bundles.spring-jms:3.2.16.RELEASE_2]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)[:1.8.0_121]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)[:1.8.0_121]
at java.lang.Thread.run(Thread.java:745)[:1.8.0_121]
如何更改ActiveMQ队列的属性？
该错误来自http端点，而不是ActiveMQ队列。
我不建议为一种消息类型更改代理上的最大消息大小。
相反，我建议：