trunk/examples/camel-example-tracer/src/main/resources/META-INF/spring/camel-context.xml

<?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.
-->

<!-- Configures the Camel Context-->

<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 using parallel execution -->
            <split parallelProcessing="true">
                <!-- 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="jpaTemplate" class="org.springframework.orm.jpa.JpaTemplate">
        <property name="entityManagerFactory" ref="entityManagerFactory"/>
    </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 -->

    <!-- let's show a simple UI to browse the database -->
    <bean id="databaseExplorer" class="org.apache.camel.spring.util.MainRunner" lazy-init="false">
        <property name="main" value="org.hsqldb.util.DatabaseManagerSwing"/>
        <property name="args">
            <list>
                <value>--url</value>
                <value>jdbc:hsqldb:mem:camel_tracer</value>
            </list>
        </property>
        <property name="delay" value="2000"/>
    </bean>
</beans>