如何在使用“timer”循环处理时访问“路由”中的当前ZonedDateTime（或Date）？

  • Z时代
  • 2024-01-10
  • 分类：问答

背景：如何在使用“timer”循环处理时访问“路由”中的当前ZonedDateTime（或Date）？

“配置（）”的方法，在下面的示例代码，循环在规定的时间间隔，此时我希望记录当前的“ZonedDateTime.now（）值

问题：

的ZonedDateTime.now（）的值总是相同的值，尽管间隔时间差

问题：

我可以使用什么样的技术在每个时间间隔来访问当前ZonedDateTime.now（）值？

（注：我最终想使用这个值作为一个REST调用的参数）

示例代码：

package aaa.bbb.ccc.dateparmissue; 
import java.time.ZonedDateTime; 
import java.time.format.DateTimeFormatter; 
import org.apache.camel.builder.RouteBuilder; 
import org.apache.camel.cdi.ContextName; 
@ContextName("rest-dsl") 
public class DateParmIssue extends RouteBuilder { 
    public DateParmIssue() { 
    } 
    private final String codeList = "AA,BB,CC"; 
    private final int notifyTime = 10; //<==10 second interval 
    @Override 
    public void configure() throws Exception { 
    org.apache.log4j.MDC.put("app.name", "dateParmIssue"); 
    System.getProperties().list(System.out); 
    onException(Exception.class) 
     .log("onException_processing_exception:" + this.exceptionMessage().toString() + "...send to_error_queue:" + body(String.class).toString()) 
     .handled(true); 
    from("timer://foo?fixedRate=true&period=" + (notifyTime * 1000)) 
     .setBody(constant(this.codeList)) 
     .to("seda:node0"); 
    from("seda:node0") 
     .split().tokenize(",") 
     .to("seda:node1"); 
    from("seda:node1") 
      .log("seda:node1...body-code=${body}...zdt=" + simple(ZonedDateTime.now().format(DateTimeFormatter.ISO_OFFSET_DATE_TIME))); 
    }  
}

样本输出...

2017-12-27 12:17:11,649 | INFO | 1 - seda://node1 | route3       | 232 - org.apache.camel.camel-core - 2.17.0.redhat-630187 | direct:node1...body-code=AA...zdt=Simple: 2017-12-27T12:17:10.306-05:00 
2017-12-27 12:17:11,653 | INFO | 1 - seda://node1 | route3       | 232 - org.apache.camel.camel-core - 2.17.0.redhat-630187 | direct:node1...body-code=BB...zdt=Simple: 2017-12-27T12:17:10.306-05:00 
2017-12-27 12:17:11,653 | INFO | 1 - seda://node1 | route3       | 232 - org.apache.camel.camel-core - 2.17.0.redhat-630187 | direct:node1...body-code=CC...zdt=Simple: 2017-12-27T12:17:10.306-05:00 
2017-12-27 12:17:21,630 | INFO | 1 - seda://node1 | route3       | 232 - org.apache.camel.camel-core - 2.17.0.redhat-630187 | direct:node1...body-code=AA...zdt=Simple: 2017-12-27T12:17:10.306-05:00 
2017-12-27 12:17:21,630 | INFO | 1 - seda://node1 | route3       | 232 - org.apache.camel.camel-core - 2.17.0.redhat-630187 | direct:node1...body-code=BB...zdt=Simple: 2017-12-27T12:17:10.306-05:00 
2017-12-27 12:17:21,631 | INFO | 1 - seda://node1 | route3       | 232 - org.apache.camel.camel-core - 2.17.0.redhat-630187 | direct:node1...body-code=CC...zdt=Simple: 2017-12-27T12:17:10.306-05:00 
2017-12-27 12:17:31,633 | INFO | 1 - seda://node1 | route3       | 232 - org.apache.camel.camel-core - 2.17.0.redhat-630187 | direct:node1...body-code=AA...zdt=Simple: 2017-12-27T12:17:10.306-05:00 
2017-12-27 12:17:31,636 | INFO | 1 - seda://node1 | route3       | 232 - org.apache.camel.camel-core - 2.17.0.redhat-630187 | direct:node1...body-code=BB...zdt=Simple: 2017-12-27T12:17:10.306-05:00 
2017-12-27 12:17:31,637 | INFO | 1 - seda://node1 | route3       | 232 - org.apache.camel.camel-core - 2.17.0.redhat-630187 | direct:node1...body-code=CC...zdt=Simple: 2017-12-27T12:17:10.306-05:00

回答：

事实证明，“计时器”在可以使用的头中插入“firedTime”属性（虽然它当前是一个java.ut il.Date对象，而不是更新的Java 8日期对象之一 - 例如ZonedDateTime）。

因此，另一种可能是如下 - 即，这说明中的日期变更...

from("seda:node1") 
    .process(new Processor(){ 
     public void process(Exchange exchange) { 
     exchange.getIn().setHeader("code", exchange.getIn().getBody().toString()); 
     exchange.getIn().setBody((new Date(exchange.getIn().getHeader("firedTime").toString()).toInstant()).atZone(ZoneId.systemDefault()).format(DateTimeFormatter.ISO_OFFSET_DATE_TIME)); 
     } 
    }) 
    .log("seda:node1...body-code=${in.header.code}...zdt=${body}");

...和日期现在改变...

2017-12-28 15:37:18,017 | INFO | 7 - seda://node1 | route17       | 232 - org.apache.camel.camel-core - 2.17.0.redhat-630187 | seda:node1...body-code=AA...zdt=2017-12-28T15:37:18-05:00 
2017-12-28 15:37:18,019 | INFO | 7 - seda://node1 | route17       | 232 - org.apache.camel.camel-core - 2.17.0.redhat-630187 | seda:node1...body-code=BB...zdt=2017-12-28T15:37:18-05:00 
2017-12-28 15:37:18,020 | INFO | 7 - seda://node1 | route17       | 232 - org.apache.camel.camel-core - 2.17.0.redhat-630187 | seda:node1...body-code=CC...zdt=2017-12-28T15:37:18-05:00 
2017-12-28 15:37:28,017 | INFO | 7 - seda://node1 | route17       | 232 - org.apache.camel.camel-core - 2.17.0.redhat-630187 | seda:node1...body-code=AA...zdt=2017-12-28T15:37:28-05:00 
2017-12-28 15:37:28,017 | INFO | 7 - seda://node1 | route17       | 232 - org.apache.camel.camel-core - 2.17.0.redhat-630187 | seda:node1...body-code=BB...zdt=2017-12-28T15:37:28-05:00 
2017-12-28 15:37:28,018 | INFO | 7 - seda://node1 | route17       | 232 - org.apache.camel.camel-core - 2.17.0.redhat-630187 | seda:node1...body-code=CC...zdt=2017-12-28T15:37:28-05:00

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