MongoDB 不适用于带有 Camel 2.18.1 的 Karaf 4.0.8

Question

我们创建了一个简单的测试包，但是一旦我们尝试在我们的 Camel 路由之一中使用 MongoDB，该路由就不再启动了。

蓝图很简单：

<?xml version="1.0" encoding="UTF-8"?>
<blueprint xmlns="http://www.osgi.org/xmlns/blueprint/v1.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:cm="http://aries.apache.org/blueprint/xmlns/blueprint-cm/v1.1.0"
    xsi:schemaLocation="
         http://www.osgi.org/xmlns/blueprint/v1.0.0 https://www.osgi.org/xmlns/blueprint/v1.0.0/blueprint.xsd
         http://camel.apache.org/schema/blueprint http://camel.apache.org/schema/blueprint/camel-blueprint.xsd
         http://aries.apache.org/blueprint/xmlns/blueprint-cm/v1.1.0 http://aries.apache.org/schemas/blueprint-cm/blueprint-cm-1.1.0.xsd">

    <bean id="mongo" class="com.mongodb.Mongo">
        <argument value="localhost"/>
    </bean>

    <camelContext id="blueprint-bean-context"
        xmlns="http://camel.apache.org/schema/blueprint">

        <route id="testTimer">
            <from uri="timer:testTimer?period=5000" />

            <setBody>
                <spel>{"type": "product"}</spel>
            </setBody>
            <to uri="mongodb:mongo?database=testdb&amp;collection=mycollection&amp;operation=findAll" />
            <log message="Result was queried" />

        </route>
    </camelContext>

</blueprint>

MongoDB 作为依赖项添加到 POM 中。 DEBUG 模式下的日志摘录给出了这些行：

2017-01-24 13:41:27,672 | DEBUG | raf-4.0.8/deploy | ReferenceRecipe                  | 12 - org.apache.aries.blueprint.core - 1.7.1 | Binding reference .camelBlueprint.languageResolver.spel to [org.apache.camel.spi.LanguageResolver]
2017-01-24 13:41:27,672 | DEBUG | raf-4.0.8/deploy | BlueprintLanguageResolver        | 55 - org.apache.camel.camel-blueprint - 2.18.1 | Found language resolver: spel in registry: org.apache.camel.impl.osgi.Activator$BundleLanguageResolver@6841375f
2017-01-24 13:41:27,673 | DEBUG | raf-4.0.8/deploy | DefaultChannel                   | 58 - org.apache.camel.camel-core - 2.18.1 | Initialize channel for target: 'SetBody[spel{SpelExpression[{"type": "product"}]}]'
2017-01-24 13:41:27,673 | DEBUG | raf-4.0.8/deploy | BlueprintContainerImpl           | 12 - org.apache.aries.blueprint.core - 1.7.1 | Instantiating component blueprintBundle
2017-01-24 13:41:27,676 | DEBUG | raf-4.0.8/deploy | DefaultManagementAgent           | 58 - org.apache.camel.camel-core - 2.18.1 | Registered MBean with ObjectName: org.apache.camel:context=de.test.bundle-x1-blueprint-bean-context,type=tracer,name=BacklogTracer
2017-01-24 13:41:27,676 | DEBUG | raf-4.0.8/deploy | BlueprintContainerImpl           | 12 - org.apache.aries.blueprint.core - 1.7.1 | Instantiating component blueprintBundle
2017-01-24 13:41:27,680 | DEBUG | raf-4.0.8/deploy | DefaultManagementAgent           | 58 - org.apache.camel.camel-core - 2.18.1 | Registered MBean with ObjectName: org.apache.camel:context=de.test.bundle-x1-blueprint-bean-context,type=tracer,name=BacklogDebugger
2017-01-24 13:41:27,683 | DEBUG | raf-4.0.8/deploy | DefaultManagementAgent           | 58 - org.apache.camel.camel-core - 2.18.1 | Registered MBean with ObjectName: org.apache.camel:context=de.test.bundle-x1-blueprint-bean-context,type=errorhandlers,name="DefaultErrorHandlerBuilder(ref:CamelDefaultErrorHandlerBuilder)"
2017-01-24 13:41:27,686 | DEBUG | raf-4.0.8/deploy | DefaultComponent                 | 58 - org.apache.camel.camel-core - 2.18.1 | Creating endpoint uri=[mongodb://mongo?collection=processing_requests&database=genex&operation=findAll], path=[mongo]
2017-01-24 13:41:27,686 | DEBUG | raf-4.0.8/deploy | BlueprintContainerImpl           | 12 - org.apache.aries.blueprint.core - 1.7.1 | Instantiating component mongo
2017-01-24 13:41:27,687 | INFO  | raf-4.0.8/deploy | BlueprintCamelContext            | 58 - org.apache.camel.camel-core - 2.18.1 | Apache Camel 2.18.1 (CamelContext: blueprint-bean-context) is shutting down
2017-01-24 13:41:27,687 | DEBUG | raf-4.0.8/deploy | efaultAsyncProcessorAwaitManager | 58 - org.apache.camel.camel-core - 2.18.1 | Shutting down with no inflight threads.
2017-01-24 13:41:27,688 | DEBUG | raf-4.0.8/deploy | TimerListenerManager             | 58 - org.apache.camel.camel-core - 2.18.1 | Removed TimerListener: org.apache.camel.management.mbean.ManagedCamelContext@1350b665
2017-01-24 13:41:27,688 | DEBUG | raf-4.0.8/deploy | DefaultManagementAgent           | 58 - org.apache.camel.camel-core - 2.18.1 | Unregistered MBean with ObjectName: org.apache.camel:context=de.test.bundle-x1-blueprint-bean-context,type=context,name="blueprint-bean-context"
2017-01-24 13:41:27,688 | DEBUG | raf-4.0.8/deploy | DefaultInflightRepository        | 58 - org.apache.camel.camel-core - 2.18.1 | Shutting down with no inflight exchanges.

为什么Camel上下文会立即启动和关闭？不执行计时器并且从不打印日志消息。只要我们删除调用 MongoDB 的 to，它就会起作用。

Answer 1

更改 bean 声明

<bean id="mongo" class="com.mongodb.Mongo">

至

<bean id="mongo" class="com.mongodb.MongoClient">

您可以在 Camel 的 Mongo 组件的 official documentation 中阅读更多相关信息。

MongoDB 不适用于带有 Camel 2.18.1 的 Karaf 4.0.8

MongoDB doesn't work on Karaf 4.0.8 with Camel 2.18.1

mongodb

apache-camel

karaf

blueprint-osgi