如何让骆驼FTP按需仅获取一次
我是骆驼的新手。
我一直在尝试让骆驼按需通过FTP仅一次获取单个文件。我无法正常工作。这是我尝试过的。让我知道什么是最好的方法,我的代码有什么问题。
并在收到 停止路由。
from("direct:myStart") .routeId("routeA")
.pollEnrich("ftp:...disconnect=true&sendEmptyMessageWhenIdle=true")
.choice()
.when(body().isNull()).process(RouteStopper("routeA"))
.otherwise().to("validator:file.xsd")
.to("somewhere")
.end();
还有我的RouteStopper
public class RouteStopper implements Processor {private String routeId;
private Thread stopper;
public RouteStopper(String routeId) {
this.routeId = routeId;
}
@Override
public void process(Exchange exchange) throws Exception {
if (stopper == null) {
stopper = new Thread() {
@Override
public void run() {
try {
exchange.getContext().stopRoute(routeId);
} catch (Exception e) {
}
}
};
}
stopper.start();
}
我第一次打电话时实际上效果很好 producerTemplate.sendBody("direct:myStart", null);
但是第二次我打电话给producerTemplate.sendBody("direct:myStart", null);
我:
org.apache.camel.component.direct.DirectConsumerNotAvailableException: No consumers available on endpoint: Endpoint[direct://myStart]. Exchange[Message: [Body is null]]
我想我要做的是不完全停止前进…所以我尝试了另一种方式…
public class FtpPollStrategy implements PollingConsumerPollStrategy {@Override
public boolean begin(Consumer consumer, Endpoint endpoint) {
return true;
}
@Override
public void commit(Consumer consumer, Endpoint endpoint, int polledMessages) {
try {
consumer.stop();
}
catch (Exception e) {
e.printStackTrace();
}
}
@Override
public boolean rollback(Consumer consumer, Endpoint endpoint, int retryCounter, Exception cause) throws Exception {
return false;
}
}
在我的路线上:
from("ftp:....disconnect=true&pollStrategy=#ftpPollStrategy")
我得到的是
java.lang.IllegalArgumentException: Could not find a suitable setter for property: pollStrategy as there isn't a setter method with same type: java.lang.String nor type conversion possible: No type converter available to convert from type: java.lang.String to the required type: org.apache.camel.spi.PollingConsumerPollStrategy with value #ftpPollStrategy
3- (如下面的注释中所建议),则好像该路由从未停止轮询我的FTP 。我只给路线打过一次电话:
producerTemplate.sendBody("direct:myStart", null);
和路线
from("direct:myStart").routeId("routeA")
.pollEnrich("ftp:...disconnect=true&sendEmptyMessageWhenIdle=true")
.to("validator:file.xsd")
.to("somewhere")
.end();
查看日志:
2015-08-05 08:55:28,942 DEBUG [correlation-
ids:faad163b-f68e-4e91-b5fd-e5e2f86d42bd,user:] [(camelContext)-1]
(org.apache.camel.component.file.remote.RemoteFileConsumer:152)
TelechargementMetadonneesRouteBuilder- Not connected/logged in, connecting to:
ftp://pierre@localhost:21 2015-08-05 08:55:28,943 INFO [correlation-
ids:faad163b-f68e-4e91-b5fd-e5e2f86d42bd,user:] [(camelContext)-1]
(org.apache.camel.component.file.remote.RemoteFileConsumer:156)
TelechargementMetadonneesRouteBuilder- Connected and logged in to:
ftp://pierre@localhost:21 2015-08-05 08:55:28,945 DEBUG [correlation-
ids:faad163b-f68e-4e91-b5fd-e5e2f86d42bd,user:] [(camelContext)-1]
(org.apache.camel.component.file.GenericFileConsumer:130)
TelechargementMetadonneesRouteBuilder- Took 0.002 seconds to poll: 2015-08-05
08:55:28,945 DEBUG [correlation-
ids:faad163b-f68e-4e91-b5fd-e5e2f86d42bd,user:] [(camelContext)-1]
(org.apache.camel.component.file.remote.RemoteFileConsumer:121)
TelechargementMetadonneesRouteBuilder- Disconnecting from:
ftp://pierre@localhost:21 2015-08-05 08:55:29,446 DEBUG [correlation-
ids:faad163b-f68e-4e91-b5fd-e5e2f86d42bd,user:] [(camelContext)-1]
(org.apache.camel.component.file.remote.RemoteFileConsumer:152)
TelechargementMetadonneesRouteBuilder- Not connected/logged in, connecting to:
ftp://pierre@localhost:21 2015-08-05 08:55:29,447 INFO [correlation-
ids:faad163b-f68e-4e91-b5fd-e5e2f86d42bd,user:] [(camelContext)-1]
(org.apache.camel.component.file.remote.RemoteFileConsumer:156)
TelechargementMetadonneesRouteBuilder- Connected and logged in to:
ftp://pierre@localhost:21 2015-08-05 08:55:29,449 DEBUG [correlation-
ids:faad163b-f68e-4e91-b5fd-e5e2f86d42bd,user:] [(camelContext)-1]
(org.apache.camel.component.file.GenericFileConsumer:130)
TelechargementMetadonneesRouteBuilder- Took 0.002 seconds to poll: 2015-08-05
08:55:29,449 DEBUG [correlation-
ids:faad163b-f68e-4e91-b5fd-e5e2f86d42bd,user:] [(camelContext)-1]
(org.apache.camel.component.file.remote.RemoteFileConsumer:121)
TelechargementMetadonneesRouteBuilder- Disconnecting from:
ftp://pierre@localhost:21
任何帮助将不胜感激。
回答:
因此,我发现的解决方案是使用场景1,但请停止并重新启动路由。
exchange.getContext().stopRoute(routeId);exchange.getContext().startRoute(routeId);
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