[英]EIP/Apache Camel - How to process message concurrently, but atomically per group?
I have the following situation: 我有以下情况:
I start the Camel route as following: 我启动Camel路线如下:
public class MyMessage implements Runnable {
public void run() {
// omitted here
}
}
from("netty:tcp://localhost:7777?textline=true&sync=false")
... // omitted here: parse message to pojo MyMessage, set header "group-identifier"
.to(seda:process);
This Camel route consumes the TCP stream, parses and converts the payload of each incoming message to a MyMessage
pojo and sets the group-identifier
header on the exchange which corresponds with a message... 此Camel路由使用TCP流,解析每个传入消息的有效负载并将其转换为
MyMessage
pojo,并在交换机上设置与消息对应的group-identifier
标头...
Now I want to consume seda:process
as following: 现在我想使用
seda:process
如下:
run()
. run()
来执行。 I want to provide/define an ExecutorService
for this, so I can control the number of threads. ExecutorService
,因此我可以控制线程数。 Which enterprise integration patterns can I apply here? 我可以在这里应用哪些企业集成模式? How can I map these concepts to Camel?
我如何将这些概念映射到Camel?
I learnt that ActiveMQ has the concept of message groups ( http://activemq.apache.org/message-groups.html ). 我了解到ActiveMQ具有消息组的概念( http://activemq.apache.org/message-groups.html )。 This might provide a way to make sure that two messages of the same group will never be executed at the same time.
这可能提供一种方法来确保同一组中的两条消息永远不会同时执行。 Though, I am not sure that introducing ActiveMQ only for this isn't overkill.
虽然,我不确定仅为此引入ActiveMQ并不是一种矫枉过正。 Can this also be achieved with 'core' Camel/Java?
这可以通过'核心'Camel / Java来实现吗?
It is quite easy to do this in ActiveMQ. 在ActiveMQ中很容易做到这一点。 The following code snippet simulates executing messages as required:
以下代码段根据需要模拟执行消息:
This relies on ActiveMQ message groups as explained on http://activemq.apache.org/message-groups.html . 这依赖于http://activemq.apache.org/message-groups.html上解释的ActiveMQ消息组。
final CamelContext context = new DefaultCamelContext();
context.addComponent("activemq", ActiveMQComponent.activeMQComponent("vm://localhost?broker.persistent=false"));
context.addRoutes(new RouteBuilder() {
@Override
public void configure() {
from("activemq:queue:q?concurrentConsumers=5")
.process(exchange -> {
System.out.println(Thread.currentThread() + " - " + exchange.getIn().getBody());
Thread.sleep(5000);
});
}
});
context.start();
for (int i = 0; i < 1000; ++i) {
context.createFluentProducerTemplate()
.withBody("This is a message from group : " + (i % 5))
.withHeader("JMSXGroupID", "" + (i % 5))
.to("activemq:queue:q")
.send();
}
That said, I am (still) wondering if this could be done with pure EIPs/Camel-core. 也就是说,我(仍然)想知道这是否可以用纯EIP / Camel-core完成。
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