在繼續給其他線程, Apache Camel : File to BeanIO and merge beanIO objects based on idApache的駱駝:GroupedExchangeAggregationStrategy組DefaultExchange代替消息主體
試圖組使用GroupedExchangeAggregationStrategy的EmployeeDetails如下
from("seda:aggregate").aggregate(simple("${body.id}"), new
MergeAggregationStrategy()).completionSize(3).log("Details - ${header.details}").to("seda:formList");
from("seda:formList").aggregate(new
GroupedExchangeAggregationStrategy()).constant(true).completionTimeout(10)
.process(EmployeeDetailsBeanProcessor).log("Final list of groupedExchangeAggr ${body}")
.log("FILE PROCESSING COMPLETED");
EmployeeDetailsBeanProcessor:
public class EmployeeDetailsBeanProcessor implements Processor{
public void process(Exchange exchange) throws Exception {
ArrayList<EmployeeDetails> rows = exchange.getIn().getBody(ArrayList.class);
for (EmployeeDetails record : rows) {
System.out.println("----- Record:: ----- "+
record.getId() + " "+
record.getName() + " " +
record.getJob() +" "+
record.getEmail() + " "+
record.getCity()+" "+
record.getCode());
}
}
}
我的理解是當GroupExchangedAggregationStr使用ategy時,當前的Exchange將被添加到列表中,但是在測試時它會添加DefaultExchange而不是當前的Exchange和EmployeeDetails。
ERROR 4236 --- [eTimeoutChecker] o.a.camel.processor.DefaultErrorHandler : Failed delivery for (MessageId: ID-admin-PC-49678-1508604904882-0-30 on ExchangeId: ID-admin-PC-49678-1508604904882-0-29). Exhausted after delivery
attempt: 1 caught: java.lang.ClassCastException: org.apache.camel.impl.DefaultExchange cannot be cast to com.test.EmployeeDetails
你能給出一些關於分組交換的例子或說明嗎?提前致謝。