Question

我正在学习来自＆＃34; Camel in Action＆＃34;预订，目前我正在进行数据转换。更特别是Content Enricher EIP。我注意到，当我从书中运行下面的代码时，Camel会创建fileName + .camelLock文件，但在完成路径后它不会将其删除。

代码方面有什么问题吗？或者应该这样工作？

import java.io.File;

import org.apache.camel.Exchange;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.processor.aggregate.AggregationStrategy;
import org.apache.camel.test.junit4.CamelTestSupport;
import org.junit.Test;

public class OrderToCsvProcessorTest extends CamelTestSupport {

    @Test
    public void testOrderToCsvProcessor() throws Exception {
        // this is the inhouse format we want to transform to CSV
        String inhouse = "0000004444000001212320091208  1217@1478@2132";
        template.sendBodyAndHeader("direct:start", inhouse, "Date", "20091208");

        File file = new File("target/orders/received/report-20091208.csv");
        assertTrue("File should exist", file.exists());

        // compare the expected file content
        String body = context.getTypeConverter().convertTo(String.class, file);
        assertEquals("000000444,20091208,000001212,1217,1478,2132\nthis,is,sample,string", body);
    }

    @Override
    protected RouteBuilder createRouteBuilder() throws Exception {
        return new RouteBuilder() {
            @Override
            public void configure() throws Exception {
                from("direct:start")
                        .process(new OrderToCsvProcessor())
                        .pollEnrich("file://target/input?noop=true",
                                new AggregationStrategy() {
                                    @Override
                                    public Exchange aggregate( Exchange oldExchange, Exchange newExchange) {
                                        if (newExchange == null) {
                                            return oldExchange;
                                        }

                                        String http = oldExchange.getIn().getBody(String.class);
                                        String ftp = newExchange.getIn().getBody(String.class);

                                        String body = http + "\n" + ftp;

                                        oldExchange.getIn().setBody(body);

                                        return oldExchange;
                                    }
                                })
                        .to("file://target/orders/received?fileName=report-${header.Date}.csv");
            }
        };
    }
}

代码中使用的处理器：

import org.apache.camel.Exchange;
import org.apache.camel.Processor;

public class OrderToCsvProcessor implements Processor {

    public void process(Exchange exchange) throws Exception {
        String custom = exchange.getIn().getBody(String.class);

        String id = custom.substring(0, 9);
        String customerId = custom.substring(10, 19);
        String date = custom.substring(20, 29);
        String items = custom.substring(30);
        String[] itemIds = items.split("@");

        StringBuilder csv = new StringBuilder();
        csv.append(id.trim());
        csv.append(",").append(date.trim());
        csv.append(",").append(customerId.trim());
        for (String item : itemIds) {
            csv.append(",").append(item.trim());
        }

        exchange.getIn().setBody(csv.toString());
    }

}

Answer 1

GenericFileOnCompletion负责删除锁定文件。你需要像这样在AggregationStrategy中切换完成。

new AggregationStrategy() { 
  @Override
   public Exchange aggregate( Exchange oldExchange, Exchange newExchange) {    if (newExchange == null) {
      return oldExchange;    }

   String http = oldExchange.getIn().getBody(String.class);    String ftp = newExchange.getIn().getBody(String.class);

   String body = http + "\n" + ftp;

   oldExchange.getIn().setBody(body);
     newExchange.handoverCompletions(oldExchange);

   return oldExchange;  } })

Answer 2

该问题是由于您正在使用具有自定义AggregationStrategy 的pollEnrich提取文件。

在这种使用情况下使用自定义AggregationStrategy时，则需要将聚合Exchange的某些属性复制到原始Exchange上，以正确删除Camel markerFile

因此，在您的AggregationStrategy策略结束时，您可以执行以下操作：

int checkPrime_fix1(int isItPrime) {
    int result = 0, j = 2;
    // Avoid sqrt(isItPrime). Floating point has too many subtle problem for an integer task
    // Avoid j*j <= isItPrime to prevent overflow with large isItPrime
    while(j <= isItPrime/j) {
        result = isItPrime%j;
        j++;
        if (result==0)
            return 0;
    }
    return isItPrime > 1;
}

来源：https://access.redhat.com/solutions/2189891

完成路由测试后，Camel不会删除camelLock文件

2 个答案: