Question

我有一个包含多个入口点（servlet和direct）的路由。当通过servlet激活时，它需要做一些工作。必须为servlet请求完成这项工作（即使存在坏的actor）。如果通过直接进行交换，则不得进行此项工作。以下是代码中的示例：

// In a Route Builder somewhere.
from("servlet:///myService").inOut("direct:myService");
from("direct:myService").process(new ConditionalProcessor());

// Implementation of processor above.
public class ConditionalProcessor implements Processor {

    @Override
    public void process(Exchange exchange) throws Exception {
        if(comesFromServlet(exchange)){
            // Logic for Servlet.
        } else {
            // Logic for direct and other.
        }
    }

    /**
     * Must return true if the exchange started as a request to the servlet.
     * Otherwise must return false.
     * 
     * @param exchange
     * @return
     */
    public boolean comesFromServlet(Exchange exchange){
        // What goes here?
    }

}

Answer 1

Exchange上还有一个API，可以告诉您从哪个端点创建它。 http://camel.apache.org/maven/current/camel-core/apidocs/org/apache/camel/Exchange.html#getFromEndpoint（）

exchange.getFromEndpoint().getEndp

另一种方法是，如果您为路线分配ID，您也可以获得此

String fromRoute = exchange.getFromRouteId();

您可以使用.routeId（＆＃34; myRouteId＆＃34;）为路线分配ID

from("servlet:///myService").routeId("myRouteId")

Answer 2

我受到另一篇文章this comment的启发。这是我的解决方案：

// In a Route Builder somewhere.
from("servlet:///myService")
    .setHeader(ConditionalProcessor.PROPERTY, constant(true))
    .inOut("direct:myService");
from("direct:myService").process(new ConditionalProcessor());

// Implementation of processor above.
public class ConditionalProcessor implements Processor {
    public static final String PROPERTY = "came.from.servlet";
    @Override
    public void process(Exchange exchange) throws Exception {
        if(comesFromServlet(exchange)){
            // Logic for Servlet.
        } else {
            // Logic for direct and other.
        }
    }

    public boolean comesFromServlet(Exchange exchange){
        return exchange.getProperty(PROPERTY, true, Boolean.class);
    }

}

如何根据Camel Exchange的来源进行不同的处理？

2 个答案: