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我想從碼頭端點（另一個服務）獲取JSON數據，創建輸出數據並將它們發送到一個或多個CVS文件。我有2個路由 - 第一個創建基於cron設置的當前日期的文件，第二個公開Jetty端點爲GET請求上的任何指定日期創建文件。除了起點之外，它們都是一樣的，我也嘗試從第二個端點發送消息到第一個端點...在這兩種情況下，都會創建CSV文件，但第二個路由會給我org.apache.camel.TypeConversionException。我的路線是：奇怪的Apache駱駝異常
from(httpServer + "/lineups?throwExceptionOnFailure=false?httpMethodRestrict=GET")
.routeId("manualStart")
.setExchangePattern(ExchangePattern.InOnly)
.setHeader(Exchange.HTTP_URI, simple(apiEndpoint + "/lineups"))
.setHeader("target_date", simple("${in.header.date}"))
.setHeader(Exchange.HTTP_QUERY, simple("date=${in.header.date}"))
.setHeader(Exchange.HTTP_METHOD, constant("GET"))
.to("https://dummyhost")
.process(new MappingProcessor())
.split(body())
.setHeader("prefix", simple("${body.name}"))
.process(new FileNameProcessor())
.marshal(bindy)
.aggregate(header("prefix"), new FileAggregationStrategy())
.completionTimeout(60000L)
.to("file:" + fileLocation + "?fileName=Nielsen.${in.header.prefix}.${in.header.target_date}.txt");
我得到異常以下：
16:41:50.493 [qtp1583020257-49] ERROR o.a.c.c.j.CamelContinuationServlet - Error processing request
org.apache.camel.TypeConversionException: Error during type conversion from type: java.lang.String to the required type: java.io.InputStream with value
[[email protected], [email protected], com.... [Body clipped after 1000 chars, total length is 23865] due Failed to convert from type [java.util.ArrayList<?>] to type [java.io.InputStream] for value ...
...
[email protected]]';
nested exception is org.springframework.core.convert.ConverterNotFoundException: No converter found capable of converting from type [java.util.ArrayList<?>] to type [java.io.InputStream]
at org.apache.camel.impl.converter.BaseTypeConverterRegistry.createTypeConversionException(BaseTypeConverterRegistry.java:610)
at org.apache.camel.impl.converter.BaseTypeConverterRegistry.convertTo(BaseTypeConverterRegistry.java:137)
at org.apache.camel.impl.MessageSupport.getBody(MessageSupport.java:72)
at org.apache.camel.impl.MessageSupport.getBody(MessageSupport.java:47)
at org.apache.camel.http.common.DefaultHttpBinding.doWriteDirectResponse(DefaultHttpBinding.java:396)
at org.apache.camel.http.common.DefaultHttpBinding.doWriteResponse(DefaultHttpBinding.java:332)
at org.apache.camel.http.common.DefaultHttpBinding.writeResponse(DefaultHttpBinding.java:264)
at org.apache.camel.component.jetty.CamelContinuationServlet.service(CamelContinuationServlet.java:227)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:821)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1685)
at org.apache.camel.component.jetty.CamelFilterWrapper.doFilter(CamelFilterWrapper.java:45)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1668)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:581)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1158)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:511)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1090)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:119)
at org.eclipse.jetty.server.Server.handleAsync(Server.java:567)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:325)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:242)
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:261)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:95)
at org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:75)
at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceAndRun(ExecuteProduceConsume.java:213)
at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:147)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:654)
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:572)
at java.lang.Thread.run(Thread.java:745)
Caused by: org.springframework.core.convert.ConversionFailedException: Failed to convert from type [java.util.ArrayList<?>] to type [java.io.InputStream] for value
爲CSV格式我的數據格式：
DataFormat bindy = new BindyCsvDataFormat(MyOutput.class);
這是FileAggregationStrategy：
public class FileAggregationStrategy implements AggregationStrategy {
@Override
public Exchange aggregate(Exchange oldExchange, Exchange newExchange) {
if (oldExchange == null) {
return newExchange;
}
String oldBody = oldExchange.getIn().getBody(String.class);
String newBody = newExchange.getIn().getBody(String.class);
String body = oldBody + newBody;
oldExchange.getIn().setBody(body);
return oldExchange;
}
}
我試着在每個步驟之後添加.log（） nd我發現異常引發.aggregate。
什麼可能是錯的？另一條路線從
from("quartz://start/api_cron/?cron=" + cronExpression + "&fireNow=true")
沒有任何例外。
行我發現CamelContinuationServlet是碼頭組件的一部分，它是利用碼頭延續「。我嘗試在端點uri中使用useContinuation = false選項關閉jetty延續，但仍然收到異常... –