駱駝保險絲從JSON到JSON的路線不起作用

我正在玩駱駝保險絲工具，通過數據映射器從JSON轉換爲JSON。我已經能夠使用數據映射器將XML轉換爲JSON。駱駝保險絲從JSON到JSON的路線不起作用

但是，當我嘗試接收json對象，然後將其映射到數據然後發送它時，數據映射失敗，並顯示以下消息。

請注意，我正在構建將在Tomcat服務器上運行的東西，這就是爲什麼我使用camel-config.xml文件的原因。

任何想什麼可能是錯的？

帕特里克

java.lang.NullPointerException 
    at org.apache.camel.component.dozer.DozerProducer.process(DozerProducer.java:78) 
    at org.apache.camel.util.AsyncProcessorConverterHelper$ProcessorToAsyncProcessorBridge.process(AsyncProcessorConverterHelper.java:61) 
    at org.apache.camel.processor.SendProcessor.process(SendProcessor.java:141) 
    at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:460) 
    at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:190) 
    at org.apache.camel.processor.Pipeline.process(Pipeline.java:121) 
    at org.apache.camel.processor.Pipeline.process(Pipeline.java:83) 
    at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:190) 
    at org.apache.camel.component.jetty.CamelContinuationServlet.service(CamelContinuationServlet.java:162) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) 
    at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:808) 
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1669) 
    at org.eclipse.jetty.servlets.MultiPartFilter.doFilter(MultiPartFilter.java:146) 
    at org.apache.camel.component.jetty.CamelFilterWrapper.doFilter(CamelFilterWrapper.java:43) 
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652) 
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585) 
    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127) 
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515) 
    at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061) 
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141) 
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97) 
    at org.eclipse.jetty.server.Server.handle(Server.java:499) 
    at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:310) 
    at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257) 
    at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:540) 
    at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635) 
    at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555) 
    at java.lang.Thread.run(Unknown Source)java.lang.NullPointerException 
    at org.apache.camel.component.dozer.DozerProducer.process(DozerProducer.java:78) 
    at org.apache.camel.util.AsyncProcessorConverterHelper$ProcessorToAsyncProcessorBridge.process(AsyncProcessorConverterHelper.java:61) 
    at org.apache.camel.processor.SendProcessor.process(SendProcessor.java:141) 
    at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:460) 
    at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:190) 
    at org.apache.camel.processor.Pipeline.process(Pipeline.java:121) 
    at org.apache.camel.processor.Pipeline.process(Pipeline.java:83) 
    at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:190) 
    at org.apache.camel.component.jetty.CamelContinuationServlet.service(CamelContinuationServlet.java:162) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) 
    at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:808) 
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1669) 
    at org.eclipse.jetty.servlets.MultiPartFilter.doFilter(MultiPartFilter.java:146) 
    at org.apache.camel.component.jetty.CamelFilterWrapper.doFilter(CamelFilterWrapper.java:43) 
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652) 
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585) 
    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127) 
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515) 
    at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061) 
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141) 
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97) 
    at org.eclipse.jetty.server.Server.handle(Server.java:499) 
    at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:310) 
    at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257) 
    at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:540) 
    at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635) 
    at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555) 
    at java.lang.Thread.run(Unknown Source)

這裏是我的輸入以.json

{ 
    "id": "138784", 
    "fields": 
    { 
     "description": "Maxed", 
     "summary": "Max is my name", 
     "created": "2015-09-28", 
     "duedate": "2015-09-28", 
     "updated": "2015-09-28" 
    } 
}

這裏是我的預期輸出：

{ 
    "theType" : "Transaction", 
    "theId" : "0", 
    "attributes" : { 
    "valuationDate" : "", 
    "amount" : "108.15", 
    "valueDate" : "", 
    "description" : "description 0", 
    "type" : "withdrawal", 
    "verificationId" : "verificationId 0" 
    }, 
    "type" : "Transaction", 
    "id" : "0" 
}

這裏是我的轉換映射：

<?xml version="1.0" encoding="UTF-8" standalone="yes"?> 
<mappings xmlns="http://dozer.sourceforge.net" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://dozer.sourceforge.net http://dozer.sourceforge.net/schema/beanmapping.xsd"> 
    <configuration> 
     <wildcard>false</wildcard> 
    </configuration> 
    <mapping> 
     <class-a>input.Input</class-a> 
     <class-b>transaction1.Transaction1</class-b> 
     <field> 
      <a>id</a> 
      <b>attributes.verificationId</b> 
     </field> 
    </mapping> 
    <mapping> 
     <class-a>input.Fields</class-a> 
     <class-b>transaction1.Attributes</class-b> 
     <field> 
      <a>description</a> 
      <b>description</b> 
     </field> 
     <field> 
      <a>created</a> 
      <b>valuationDate</b> 
     </field> 
     <field> 
      <a>duedate</a> 
      <b>valueDate</b> 
     </field> 
     <field> 
      <a>summary</a> 
      <b>type</b> 
     </field> 
     <field> 
      <a>updated</a> 
      <b>amount</b> 
     </field> 
    </mapping> 
    <mapping> 
     <class-a>org.apache.camel.component.dozer.ExpressionMapper</class-a> 
     <class-b>transaction1.Transaction1</class-b> 
     <field custom-converter-id="_expressionMapping" custom-converter-param="constant:Transaction"> 
      <a>expression</a> 
      <b>theType</b> 
     </field> 
     <field custom-converter-id="_expressionMapping" custom-converter-param="constant:0"> 
      <a>expression</a> 
      <b>theId</b> 
     </field> 
     <field custom-converter-id="_expressionMapping" custom-converter-param="constant:2"> 
      <a>expression</a> 
      <b>id</b> 
     </field> 
    </mapping> 
</mappings>

最後這裏的文件在我的路由配置：駱駝-config.xml中

<?xml version="1.0" encoding="UTF-8"?> 
<!-- 
    Licensed to the Apache Software Foundation (ASF) under one or more 
    contributor license agreements. See the NOTICE file distributed with 
    this work for additional information regarding copyright ownership. 
    The ASF licenses this file to You under the Apache License, Version 2.0 
    (the "License"); you may not use this file except in compliance with 
    the License. You may obtain a copy of the License at 

    http://www.apache.org/licenses/LICENSE-2.0 

    Unless required by applicable law or agreed to in writing, software 
    distributed under the License is distributed on an "AS IS" BASIS, 
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
    See the License for the specific language governing permissions and 
    limitations under the License. 
--> 


<!-- here we have the Camel route(s). --> 
<!-- we must still use the http://camel.apache.org/schema/spring namespace so Camel can load the routes 
    though Spring JARs is not required --> 
<!-- incoming requests from the servlet is routed --> 
<!-- is there a header with the key name? --> 
<!-- yes so return back a message to the user --> 
<!-- if no name parameter then output a syntax to the user --> 

<routes xmlns="http://camel.apache.org/schema/spring"> 
    <route> 
    <from uri="jetty:http://localhost:8091/camel/input/input"/> 
    <log message="Log1 ${body}"/> 
    <to uri="dozer:transformation11?sourceModel=input.Input&amp;targetModel=transaction0.Transaction0&amp;mappingFile=transformation.xml"/> 
    <log message="Log2 ${body}"/> 
    <marshal> 
     <json library="Jackson"/> 
    </marshal> 
    <to uri="jetty:http://localhost:8088/camel/transaction/output?bridgeEndpoint=true&amp;throwExceptionOnFailure=false"/> 
    </route> 
</routes>

來源

2015-11-08 Patrik Jonsson

在tomcat內部是否失敗，或者從IDE作爲camelcontext運行它？ –

當我從IDE（Eclipse）運行它時，它失敗。 –

那麼，你有沒有試圖刷新和清理項目？可能是因爲這個文件有一個更新，它沒有找到它，因此nullpointerexception .. –

雖然這是偉大的，JBoss的保險絲是得到一個圖形映射器，我認爲，因爲它是一個新的組件，你可能應該給它需要一段時間才能修復最終的錯誤並優化性能。當我測試它時，至少對我來說，它慢慢地退出了。

對於純粹的json-to-json映射，也許你可以看看組件camel-jolt。 http://camel.apache.org/jolt.html

來源

2015-11-13 13:19:52

駱駝保險絲從JSON到JSON的路線不起作用

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