Question

我有一个问题，我似乎无法独自解决。如果有一个OSGI Bundle，它使用蓝图来实例化应该部署到Karaf 3.0.0的Objects。问题是，ClassNotFoundExceptions一直困扰着我，尽管相应的jar都位于bundle jar中。这是我的pom.xml：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.kneipenapp</groupId>
    <artifactId>web-service</artifactId>
    <name>WebService</name>
    <version>0.0.1</version>
    <packaging>bundle</packaging>

    <dependencies>

        <!-- Database connection -->
        <dependency>
            <groupId>commons-dbcp</groupId>
            <artifactId>commons-dbcp</artifactId>
            <version>2.0</version>
        </dependency>

        <dependency>
            <groupId>commons-pool</groupId>
            <artifactId>commons-pool</artifactId>
            <version>2.2</version>
        </dependency>

        <dependency>
            <groupId>com.mysql</groupId>
            <artifactId>mysql-driver</artifactId>
            <version>5.1.29</version>
        </dependency>

        <!-- Camel -->
        <dependency>
            <groupId>org.apache.camel</groupId>
            <artifactId>camel-blueprint</artifactId>
            <version>2.13.0</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>org.apache.camel</groupId>
            <artifactId>camel-core</artifactId>
            <version>2.13.0</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>org.apache.camel</groupId>
            <artifactId>camel-sql</artifactId>
            <version>2.13.0</version>
            <scope>provided</scope>
        </dependency>

        <!-- Http Handler exposing -->
        <dependency>
            <groupId>org.glassfish.grizzly</groupId>
            <artifactId>grizzly-http</artifactId>
            <version>2.3.11</version>
            <scope>provided</scope>
        </dependency>

        <!-- Jersey -->
        <dependency>
            <groupId>org.glassfish.jersey.containers</groupId>
            <artifactId>jersey-container-servlet</artifactId>
            <version>2.7</version>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.felix</groupId>
                <artifactId>maven-bundle-plugin</artifactId>
                <extensions>true</extensions>
                <configuration>
                    <instructions>
                        <Embed-Dependency>
                            *;scope=compile|runtime
                        </Embed-Dependency>
                        <Import-Package>
                            !*,
                            org.glassfish.grizzly.http,
                            org.apache.camel.component.sql,
                            org.osgi.framework
                        </Import-Package>
                    </instructions>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

这是我的蓝图xml文件之一（这个导致ClassNotFoundException）：

<?xml version="1.0" encoding="UTF-8"?>
<blueprint xmlns="http://www.osgi.org/xmlns/blueprint/v1.0.0">

    <!-- The camel context which will hold the routes -->
    <camelContext id="context" xmlns="http://camel.apache.org/schema/blueprint">
        <routeContextRef ref="newElementContext"/>
    </camelContext>

    <!-- The OSGI service beans which will be used to publish the service through the Grizzly Http Server -->

    <bean id="endpoint" class="org.glassfish.jersey.server.internal.RuntimeDelegateImpl" factory-method="getInstance">
        <argument index="0" ref="endpointImplementation"/>
        <argument index="1" value="org.glassfish.grizzly.HttpHandler"/>
    </bean>

    <bean id="endpointImplementation" class="com.kneipenapp.service.ServiceEndpoint">
        <argument index="0" ref="context"/>
    </bean>

    <!-- The pooled connection -->
    <bean id="connectionFactory" class="org.apache.commons.dbcp2.DriverManagerConnectionFactory">
        <argument index="0" value="{{connection.url}}"/>
        <argument index="1" value="sqluser"/>
        <argument index="2" value="sqluserpw"/>
    </bean>

    <bean id="pooledSQLConnectionFactory" class="PooledSqlConnectionFactory">
        <argument index="0" ref="connectionFactory"/>
        <argument index="1" value="com.mysql.jdbc.Driver"/>
    </bean>

    <bean id="poolConfig" class="org.apache.commons.pool2.impl.GenericObjectPoolConfig">
        <property name="maxTotal" value="{{pool.maxConnections}}"/>
        <property name="maxIdle" value="{{pool.maxIdleConnections}}"/>
        <property name="minIdle" value="{{pool.minimumIdleConnections}}"/>
        <property name="maxWaitMillis" value="{{pool.waitInterval}}"/>
    </bean>

    <bean id="connectionPool" class="org.apache.commons.pool2.impl.GenericObjectPool">
        <argument index="0" ref="pooledSQLConnectionFactory"/>
        <argument index="1" ref="poolConfig"/>
    </bean>

    <bean id="dataSource" class="org.apache.commons.dbcp2.PoolingDataSource">
        <argument index="0" ref="connectionPool"/>
    </bean>

    <!-- The SQL endpoint used by the route -->
    <bean id="sql" class="org.apache.camel.component.sql.SqlComponent">
        <property name="dataSource" ref="dataSource"/>
    </bean>

</blueprint>

最后这是我尝试启动捆绑包时收到的Exception和Stacktrace：

org.osgi.service.blueprint.container.ComponentDefinitionException: Unable to load class PooledSqlConnectionFactory from recipe BeanRecipe[name='pooledSQLConnectionFactory']
    at org.apache.aries.blueprint.di.AbstractRecipe.doLoadType(AbstractRecipe.java:195)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.blueprint.di.AbstractRecipe.loadType(AbstractRecipe.java:161)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.blueprint.container.BeanRecipe.loadClass(BeanRecipe.java:249)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.blueprint.container.BeanRecipe.getType(BeanRecipe.java:895)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.blueprint.container.BeanRecipe.getInstance(BeanRecipe.java:323)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.blueprint.container.BeanRecipe.internalCreate2(BeanRecipe.java:806)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.blueprint.container.BeanRecipe.internalCreate(BeanRecipe.java:787)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.blueprint.di.AbstractRecipe$1.call(AbstractRecipe.java:79)[4:org.apache.aries.blueprint.core:1.3.0]
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)[:1.7.0_25]
    at java.util.concurrent.FutureTask.run(FutureTask.java:166)[:1.7.0_25]
    at org.apache.aries.blueprint.di.AbstractRecipe.create(AbstractRecipe.java:88)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.blueprint.di.RefRecipe.internalCreate(RefRecipe.java:62)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.blueprint.di.AbstractRecipe.create(AbstractRecipe.java:106)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.blueprint.container.BeanRecipe.getInstance(BeanRecipe.java:268)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.blueprint.container.BeanRecipe.internalCreate2(BeanRecipe.java:806)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.blueprint.container.BeanRecipe.internalCreate(BeanRecipe.java:787)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.blueprint.di.AbstractRecipe$1.call(AbstractRecipe.java:79)[4:org.apache.aries.blueprint.core:1.3.0]
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)[:1.7.0_25]
    at java.util.concurrent.FutureTask.run(FutureTask.java:166)[:1.7.0_25]
    at org.apache.aries.blueprint.di.AbstractRecipe.create(AbstractRecipe.java:88)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.blueprint.di.RefRecipe.internalCreate(RefRecipe.java:62)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.blueprint.di.AbstractRecipe.create(AbstractRecipe.java:106)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.blueprint.container.BeanRecipe.getInstance(BeanRecipe.java:268)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.blueprint.container.BeanRecipe.internalCreate2(BeanRecipe.java:806)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.blueprint.container.BeanRecipe.internalCreate(BeanRecipe.java:787)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.blueprint.di.AbstractRecipe$1.call(AbstractRecipe.java:79)[4:org.apache.aries.blueprint.core:1.3.0]
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)[:1.7.0_25]
    at java.util.concurrent.FutureTask.run(FutureTask.java:166)[:1.7.0_25]
    at org.apache.aries.blueprint.di.AbstractRecipe.create(AbstractRecipe.java:88)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.blueprint.di.RefRecipe.internalCreate(RefRecipe.java:62)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.blueprint.di.AbstractRecipe.create(AbstractRecipe.java:106)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.blueprint.container.BeanRecipe.setProperty(BeanRecipe.java:933)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.blueprint.container.BeanRecipe.setProperties(BeanRecipe.java:907)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.blueprint.container.BeanRecipe.setProperties(BeanRecipe.java:888)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.blueprint.container.BeanRecipe.internalCreate2(BeanRecipe.java:820)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.blueprint.container.BeanRecipe.internalCreate(BeanRecipe.java:787)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.blueprint.di.AbstractRecipe$1.call(AbstractRecipe.java:79)[4:org.apache.aries.blueprint.core:1.3.0]
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)[:1.7.0_25]
    at java.util.concurrent.FutureTask.run(FutureTask.java:166)[:1.7.0_25]
    at org.apache.aries.blueprint.di.AbstractRecipe.create(AbstractRecipe.java:88)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.blueprint.container.BlueprintRepository.createInstances(BlueprintRepository.java:245)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.blueprint.container.BlueprintRepository.createAll(BlueprintRepository.java:183)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.blueprint.container.BlueprintContainerImpl.instantiateEagerComponents(BlueprintContainerImpl.java:681)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.blueprint.container.BlueprintContainerImpl.doRun(BlueprintContainerImpl.java:378)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.blueprint.container.BlueprintContainerImpl.run(BlueprintContainerImpl.java:269)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.blueprint.container.BlueprintExtender.createContainer(BlueprintExtender.java:276)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.blueprint.container.BlueprintExtender.createContainer(BlueprintExtender.java:245)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.blueprint.container.BlueprintExtender.modifiedBundle(BlueprintExtender.java:235)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.util.tracker.hook.BundleHookBundleTracker$Tracked.customizerModified(BundleHookBundleTracker.java:500)[2:org.apache.aries.util:1.1.0]
    at org.apache.aries.util.tracker.hook.BundleHookBundleTracker$Tracked.customizerModified(BundleHookBundleTracker.java:433)[2:org.apache.aries.util:1.1.0]
    at org.apache.aries.util.tracker.hook.BundleHookBundleTracker$AbstractTracked.track(BundleHookBundleTracker.java:725)[2:org.apache.aries.util:1.1.0]
    at org.apache.aries.util.tracker.hook.BundleHookBundleTracker$Tracked.bundleChanged(BundleHookBundleTracker.java:463)[2:org.apache.aries.util:1.1.0]
    at org.apache.aries.util.tracker.hook.BundleHookBundleTracker$BundleEventHook.event(BundleHookBundleTracker.java:422)[2:org.apache.aries.util:1.1.0]
    at org.apache.felix.framework.util.SecureAction.invokeBundleEventHook(SecureAction.java:1103)[org.apache.felix.framework-4.2.1.jar:]
    at org.apache.felix.framework.util.EventDispatcher.createWhitelistFromHooks(EventDispatcher.java:695)[org.apache.felix.framework-4.2.1.jar:]
    at org.apache.felix.framework.util.EventDispatcher.fireBundleEvent(EventDispatcher.java:483)[org.apache.felix.framework-4.2.1.jar:]
    at org.apache.felix.framework.Felix.fireBundleEvent(Felix.java:4403)[org.apache.felix.framework-4.2.1.jar:]
    at org.apache.felix.framework.Felix.startBundle(Felix.java:2092)[org.apache.felix.framework-4.2.1.jar:]
    at org.apache.felix.framework.BundleImpl.start(BundleImpl.java:955)[org.apache.felix.framework-4.2.1.jar:]
    at org.apache.felix.fileinstall.internal.DirectoryWatcher.startBundle(DirectoryWatcher.java:1247)[16:org.apache.felix.fileinstall:3.2.6]
    at org.apache.felix.fileinstall.internal.DirectoryWatcher.startBundles(DirectoryWatcher.java:1219)[16:org.apache.felix.fileinstall:3.2.6]
    at org.apache.felix.fileinstall.internal.DirectoryWatcher.startAllBundles(DirectoryWatcher.java:1208)[16:org.apache.felix.fileinstall:3.2.6]
    at org.apache.felix.fileinstall.internal.DirectoryWatcher.process(DirectoryWatcher.java:503)[16:org.apache.felix.fileinstall:3.2.6]
    at org.apache.felix.fileinstall.internal.DirectoryWatcher.run(DirectoryWatcher.java:291)[16:org.apache.felix.fileinstall:3.2.6]
Caused by: java.lang.ClassNotFoundException: PooledSqlConnectionFactory not found by com.kneipenapp.web-service [80]
    at org.apache.felix.framework.BundleWiringImpl.findClassOrResourceByDelegation(BundleWiringImpl.java:1532)[org.apache.felix.framework-4.2.1.jar:]
    at org.apache.felix.framework.BundleWiringImpl.access$400(BundleWiringImpl.java:75)[org.apache.felix.framework-4.2.1.jar:]
    at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.loadClass(BundleWiringImpl.java:1955)[org.apache.felix.framework-4.2.1.jar:]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)[:1.7.0_25]
    at org.apache.felix.framework.Felix.loadBundleClass(Felix.java:1844)[org.apache.felix.framework-4.2.1.jar:]
    at org.apache.felix.framework.BundleImpl.loadClass(BundleImpl.java:937)[org.apache.felix.framework-4.2.1.jar:]
    at org.apache.aries.blueprint.container.BlueprintContainerImpl.loadClass(BlueprintContainerImpl.java:432)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.blueprint.container.BlueprintRepository.loadClass(BlueprintRepository.java:410)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.blueprint.container.GenericType.parse(GenericType.java:113)[4:org.apache.aries.blueprint.core:1.3.0]
    at org.apache.aries.blueprint.di.AbstractRecipe.doLoadType(AbstractRecipe.java:168)[4:org.apache.aries.blueprint.core:1.3.0]
    ... 63 more

如果有人知道如何解决这个问题，我会非常乐意听到它

问候，帕斯卡

Answer 1

也许，在指定bean元素的class参数时，应该使用包括包名的完整限定类名。就像'pooledSQLConnectionFactory'上方的'connectionFactory'bean一样。

Answer 2

您的 connectionPool 由构造函数

创建

public GenericObjectPool(PooledObjectFactory < T > factory, GenericObjectPoolConfig config) {...}

是你的 class =“PooledSqlConnectionFactory”实现 PooledObjectFactory＆lt;来自commons-pool2的T＆gt; 或者扩展 BasePooledObjectFactory＆lt; T＆gt; 正确的覆盖，构造函数等？

您必须检查您提供的参数（ pooledSQLConnectionFactory 和 poolConfig ）是否与 org.apache.commons.pool2.impl.GenericObjectPool的constuctor兼容

另外，我不知道Apache Aries，但也许你也检查它如何与Generics一起工作。
看到 https://issues.apache.org/jira/browse/ARIES-960
和https://issues.apache.org/jira/browse/ARIES-834

OSGI包启动期间的ClassNotFoundException

2 个答案: