Question

是否有一种简单的方法可以跳过csv头的第一行，使用camel EIP spliter处理所有其他行并聚合所有行，包括跳过的行？我需要在CSV文件中转换每个记录的日期，但跳过第一行是标题。我试图使用骆驼EIP分配器。谢谢！

<route 
    id="core.predix.consumer.route"
    autoStartup="true" >
    <from id="predixConsumer" ref="predixConsumer" />   
    <convertBodyTo type="java.lang.String" />
    <split streaming="true" > <!-- strategyRef="enrichmentAggregationStrategy" stopOnException="true"> -->
        <tokenize token="\n"/> 
        <log message="Split line ${body}"/>
            <!--  <process ref="EnrichementProcessor"/> -->
    </split>
    <to uri="{{fileDestinationEndpoint}}" />
</route>

Answer 1

这不起作用。我认为这样可行，因为它只应该执行语句中的内容，如果property.CamelSlitIndex＆gt; 0，但它会为每一行执行，即使CamelSplitIndex = - 0.

这是一个错误，还是我错误地使用它？

<route 
    id="core.pre.consumer.route"
    autoStartup="true" >
    <from id="preConsumer" ref="preConsumer" /> 
    <convertBodyTo type="java.lang.String" />
    <split streaming="true" > <!-- strategyRef="enrichmentAggregationStrategy" stopOnException="true"> -->
        <tokenize token="\n"/> 
        <log message="Split line ${body}"/>
        <choice>
          <when>
            <simple>"${property.CamelSplitIndex} > 0"</simple>
            <process ref="timeStampEnrichmentProcessor" />
            <log message="Camel Split Index is greater than zero: ${property.CamelSplitIndex}" />
          </when>
        </choice>           
    </split>
    <log message="body: ${body}" />
    <to uri="{{fileDestinationEndpoint}}" />
</route>

Answer 2

有点晚了，但是...

将逻辑放入聚合器中……

 <route
    id="fadec.core.PostFlightReportProducerRoute"
    autoStartup="true">
    <from uri="seda:postFlightReportProducer" />
     <split streaming="true" strategyRef="statusAggregationStrategy">
     <simple>${body}</simple>
        <log message="inbound Post Flight Summary Report message body: ${body}" />
        <process ref="postFlightReportMarshaler" />
        <to uri="velocity:templates/postFlightReportSummary.vm" />
        <log message="Velocity output: ${body}" loggingLevel="INFO" /> 
     </split>
 <wireTap uri="{{DFEndpointTest}}fileName=/${header.aircraftMetadata.outputPath}/${header.ship}_${date:now:yyyy-MM-dd_HH-mm-ss}.csv" /> 
     <choice>
        <when>
            <simple>${body} == null</simple>
            <log message="body is NULL, do not send NULL body!" />
            <stop></stop>
        </when>
        <otherwise>
            <process ref="xlsxProcessor"/>
            <wireTap uri="{{DFEndpointTest}}fileName=/${header.aircraftMetadata.outputPath}/${header.ship}_${date:now:yyyy-MM-dd_HH-mm-ss}.xlsx" />
            <log message="Sending data packet: ${header.aircraftMetadata.outputPath}/${header.ship}_${date:now:yyyy-MM-dd_HH-mm-ss}.xlsx" />
            <stop></stop>             
        </otherwise>
    </choice>
 </route>

public class StatusAggregationStrategy implements AggregationStrategy {

    private Logger log = LoggerFactory.getLogger(StatusAggregationStrategy.class.getName());

    @Override
    public Exchange aggregate(Exchange oldExchange, Exchange newExchange) {

        //-------------------------------------------------------------------------------------
        // Arrived    | oldExchange  |  newExchange | Description
        //-------------------------------------------------------------------------------------
        // A         | NULL         |  A            | first message arrives for the first group
        // B         | A            |  B            | second message arrives for the first group
        // F         | NULL         |  F            | first message arrives for the second group
        // C         | AB           |  C            | third message arrives for the first group
        //---------------------------------------------------------------------------------------
        log.info("Status Aggregation Strategy :: start");

            if ( oldExchange == null ) {  //This will set the 1st record with the Header
            log.info("old Exchange is Null");
            String body = newExchange.getIn().getBody(String.class);
            newExchange.getIn().setBody(body);
            return newExchange;
        }

    //Each newBody msg exchange will have 2 records, a header and a data record
    String newBody = newExchange.getIn().getBody(String.class);
    String existingBody = oldExchange.getIn().getBody(String.class);
    StringBuilder osb = new StringBuilder();

    log.info("New Body exchange: " + newBody);
    log.info("Old Body exchange: " + existingBody);

    String SkipRecord = "";
    String addRecord = "";
    Scanner osc = new Scanner(newBody).useDelimiter("\r\n|\n");
    while ( osc.hasNextLine() ) {
     SkipRecord = osc.nextLine();
     //osc.nextLine();  //move past header
     log.info("aggregation: skip record: " + SkipRecord);
     if (  osc.hasNextLine() ) { 
       addRecord = osc.nextLine();
       log.info("aggregation addRecord: " + addRecord );
       osb.append(addRecord).append(System.lineSeparator());
     } else { log.error("bad newBody message exchange, has no data record!"); }
    }
    osc.close();

    log.info("Joined exchange: Old body: " + existingBody + " New body: " + osb.toString());
    oldExchange.getIn().setBody(existingBody + osb.toString() );

    log.debug("Status Aggregation Strategy :: finish");

    return oldExchange;

    } //Exchange process

使用camel跳过csv的第一行EIP spliter处理所有其他行并聚合所有行，包括跳过的行

2 个答案: