在骆驼路由中实现计数变量。

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英文:

Implement counter variable in camel route

问题

以下是翻译好的内容:

我正在尝试从数据库获取员工详细信息列表,并使用REST API将其推送到外部系统。我已经能够为上述流程创建一个路由。

此外,我想要知道已创建和失败的记录数量。因此,我通过将属性设置为值0来创建了一个计数器,然后递增属性值。当我尝试递增属性值时,它始终与我初始化的值相同。

from("direct:test")
    .setBody(constant("select name as name, location as location, mobile as mobile from employee"))
    .to("jdbc:testdb")
    .process(exchange -> {
        // 将员工详细信息列表转换的自定义逻辑
    })
    .split(body())
    .setProperty("successrec", simple("0"))
    .setProperty("failurerec", simple("0"))
    .doTry()
    .setProperty("successrec", simple("${property.successrec++}"))
    .to("http://test/upload/employee")
    .doCatch(Exception.class)
    .process(exchange -> {
        Integer failureRecords = exchange.getProperty("failurerec", Integer.class);
        exchange.setProperty("failurerec", failureRecords++);
    });

我甚至尝试使用处理器来设置和获取属性值,但它没有起作用。是否有任何方法可以对成功和失败的记录进行计数?

英文:

I am trying to get the List of employee details From Database and Push it in to External System using REST API. I am able to create a route for the above flow .

Also, I want to know the count of created and failure records. So i created a counter by setting property with value 0 and then increment the property value . When i try to increment the property value it always the same as what i initialized.

 from("direct:test")
	.setBody(constant("select name as name, location as location,mobile as mobile from employee"))
    .to("jdbc:testdb")
    .process(exchange ->{
    	// Custom Logic which will convert list of Employee  Details
    })
    .split(body())
    .setProperty("successrec", simple("0"))
    .setProperty("failurerec", simple("0"))
    .doTry()
    .setProperty("successrec", simple("${property.successrec++}"))
    .to("http://test/upload/employee")
    .doCatch((Exception.class)).process( exchange ->{ 	
    	
    	Integer failureRecords=exchange.getProperty("failurerec",Integer.class);
    	exchange.setProperty("failurerec", failureRecords++);

     });

I tried even using processor to set and get the property value, But it didn't worked . Is there any way i can have a counter over success and failure records.

答案1

得分: 3

属性是局部于交换的,因此您可能需要使用路由策略来注入全局计数器。

创建路由策略:

class MyRoutePolicy extends RoutePolicySupport {
    private AtomicInteger counter = new AtomicInteger();

    @Override
    public void onExchangeBegin(Route route, Exchange exchange) {
        exchange.setProperty("counter", counter);
    }

    public int getCounter() {
        return counter.get();
    }
};

将策略与路由关联:

MyRoutePolicy policy = new MyRoutePolicy();

from("direct:test")
    .routePolicy(policy)
    ...

这是可能的解决方案之一,但根据您的需求,您也可以使用全局计数器,这可能更简单。

英文:

Properties are local to an exchange so you may need to use a Route Policy to inject a global counter.

Create a route policy:

class MyRoutePolicy extends RoutePolicySupport {
    private AtomicInteger counter = new AtomicInteger();

    @Override
    public void onExchangeBegin(Route route, Exchange exchange) {
        exchange.setProperty("counter", counter);
    }

    public int getCounter() {
        return counter.get();
    }
};

Associate the policy to the route:

MyRoutePolicy policy = new MyRoutePolicy();

from("direct:test")
    .routePolicy(policy)
    ...

This is one of the possible solutions but you may also using a global counter that depending on your needs, may be simpler.

答案2

得分: 0

使用这个策略的工作方式:

public class MyRoutePolicy extends RoutePolicySupport {
    private AtomicInteger counter = new AtomicInteger();

    @Override
    public void onExchangeBegin(Route route, Exchange exchange) {
        exchange.setProperty("counter", counter.incrementAndGet());
    }

    public int getCounter() {
        return counter.get();
    }
}
英文:

With this policy works:

public class MyRoutePolicy extends RoutePolicySupport {
    private AtomicInteger counter = new AtomicInteger();

    @Override
    public void onExchangeBegin(Route route, Exchange exchange) {
        exchange.setProperty("counter", counter.incrementAndGet());
    }

    public int getCounter() {
        return counter.get();
    }
};

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  • 本文由 发表于 2020年9月10日 21:47:30
  • 转载请务必保留本文链接:https://go.coder-hub.com/63831101.html
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