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An example showing how to persist Camel trace event messages using JPA
There is a newer version: 2.19.5
<?xml version="1.0" encoding="UTF-8"?>
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    Licensed to the Apache Software Foundation (ASF) under one or more
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    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
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    http://www.apache.org/licenses/LICENSE-2.0

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<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="
         http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
         http://camel.apache.org/schema/spring http://camel.apache.org/schema/spring/camel-spring.xsd">

  <camelContext id="camel" xmlns="http://camel.apache.org/schema/spring">
    <!-- START SNIPPET: e3 -->
    <endpoint id="traced" uri="jpa://org.apache.camel.processor.interceptor.JpaTraceEventMessage?persistenceUnit=tracer"/>
    <!-- END SNIPPET: e3 -->

    <!-- START SNIPPET: e4 -->
    <route>
      <!-- in stream to allow you to enter some text in the console -->
      <from uri="stream:in?initialPromptDelay=4000&amp;promptDelay=2000&amp;promptMessage=Enter some words:"/>

      <!-- split the text -->
      <split>
        <!-- use methodCall expression to split the words, using a java bean to do it -->
        <method bean="quoteService" method="splitWords"/>

        <!-- for each split message invoke the quote server to get a quote of the word -->
        <to uri="bean:quoteService?method=quote"/>

        <!-- now we need to find the best quote, so we aggregate all the splitted words
             we use our own strategy how to aggregate -->
        <aggregate strategyRef="myAggregateStrategy">
          <!-- correlate everything using constant true, as they are all from the same source -->
          <correlationExpression>
            <constant>true</constant>
          </correlationExpression>
          <!-- complete after 1 sec on inactivity -->
          <completionTimeout>
            <constant>1000</constant>
          </completionTimeout>
          <!-- send the result to stream out so we can see the response in the console -->
          <to uri="stream:out"/>
        </aggregate>
      </split>
    </route>
    <!-- END SNIPPET: e4 -->

  </camelContext>

  <!-- this is our aggregation strategy where we find the best quote -->
  <bean id="myAggregateStrategy" class="org.apache.camel.example.tracer.QuoteAggregator">
    <property name="coolWords">
      <list value-type="java.lang.String">
        <value>whiskey</value>
        <value>beer</value>
        <value>Camel</value>
        <value>cool</value>
        <value>great</value>
      </list>
    </property>
  </bean>

  <!-- our quote server with some quotes to start with -->
  <bean id="quoteService" class="org.apache.camel.example.tracer.QuoteService">
    <property name="quotes">
      <list value-type="java.lang.String">
        <value>Camel is cool</value>
        <value>We like beer</value>
        <value>Have a great day</value>
        <value>Whiskey in the jar</value>
        <value>The day that newer comes</value>
        <value>What a cold day</value>
      </list>
    </property>
  </bean>

  <!-- START SNIPPET: e1 -->
  <!-- use camel jpa trace so we can see all the traced exchanges in a database -->
  <bean id="camelTracer" class="org.apache.camel.processor.interceptor.Tracer">
    <!-- turn on jpa tracing, otherwise the TraceEventMessage is a non JPA Entity class -->
    <property name="useJpa" value="true"/>
    <!-- the destination to send the traced messages -->
    <property name="destination" ref="traced"/>
    <!-- we turn ordinary trace logging off so we only see the traced messages in the database,
         but you can have both if you like -->
    <property name="logLevel" value="OFF"/>
  </bean>
  <!-- END SNIPPET: e1 -->

  <!-- START SNIPPET: e2 -->
  <!-- this is ordinary JPA spring configuration -->
  <bean id="transactionTemplate" class="org.springframework.transaction.support.TransactionTemplate">
    <property name="transactionManager">
      <bean class="org.springframework.orm.jpa.JpaTransactionManager">
        <property name="entityManagerFactory" ref="entityManagerFactory"/>
      </bean>
    </property>
  </bean>

  <!-- this is ordinary JPA spring configuration -->
  <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalEntityManagerFactoryBean">
    <!-- we have named our presistence unit tracer in the META-INF/persistence.xml file -->
    <property name="persistenceUnitName" value="tracer"/>
  </bean>
  <!-- END SNIPPET: e2 -->
</beans>