骆驼航线，http4组件，动态网址参数 [英] camel route, http4 component, dynamic url parameters

问题描述

我是新来的Apache的骆驼，我只是想获得它所能做和不能做的感觉。我想用http4组件动态提供URL参数。举例来说，如果我有这样的事情：

I'm new to apache-camel and I'm just trying to get a feel for what it can and can't do. I'd like to use the http4 component to dynamically provide url parameters. For example, if I have something like this:

from("direct:start").to("http4://hostname.com/the/path")
.unmarshal().json(JsonLibrary.Jackson,MyBeanClass.class)
.to("mock:result");

然后，我有一个制片人的模板是这样的：

And then I have a producer template like this:

ProducerTemplate template = camelContext.createProducerTemplate();
Map<String,String> m = new HashMap<String,String>();
m.put("key1","val1");
m.put("key2", "val2");
template.sendBody("direct:start", m);

我希望有一些方法来转换成神奇的地图URL参数，使该被发送实际的URL是http://hostname.com/the/path?key1=val1&key2=val2。

I'm hoping there's some way to magically convert the map to url parameters, so that the actual url that gets sent is "http://hostname.com/the/path?key1=val1&key2=val2".

是这样的事情可能吗？文档没有提到这样的事，但我实在不明白，只能调用静态URL的组件如何是非常有用的。感谢您的任何见解。

Is this sort of thing possible? The documentation doesn't mention anything like this, but I don't really see how a component that can only call static urls is very useful. Thanks for any insight.

推荐答案

找到了答案：

路由可以做到这一点：

from("direct:start")
.setHeader(Exchange.HTTP_QUERY, simple("key1=${in.headers.key1}&key2=${in.headers.key2}"))
.to("http4://host.com/the/path")

和则生产者模板可以做到这一点：

And then the producer template can do this:

Map<String,Object> m = new HashMap<String,Object>();
m.put("key1", "1");
m.put("key2", "2");
template.sendBodyAndHeaders("direct:start", null, m);

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