我正在尝试使用 iPOJO API 创建一个复合组件。
最初,我将 felix 框架嵌入到我的 java 应用程序中,如下所示:
public class HostApplication
{
private HostActivator m_activator = null;
private Felix m_felix = null;
public HostApplication()
{
Map config= new HashMap();
// Create a configuration property map.
//Map config = new HashMap();
config.put(Constants.FRAMEWORK_STORAGE_CLEAN, Constants.FRAMEWORK_STORAGE_CLEAN_ONFIRSTINIT);
// Create host activator;
m_activator = new HostActivator();
List list = new ArrayList();
list.add(m_activator);
config.put(FelixConstants.SYSTEMBUNDLE_ACTIVATORS_PROP, list);
try
{
// Now create an instance of the framework with
// our configuration properties.
m_felix = new Felix(config);
// Now start Felix instance.
m_felix.start();
}
catch (Exception ex)
{
System.err.println("Could not create framework: " + ex);
ex.printStackTrace();
}
// Register the application's context as an OSGi service!
BundleContext bundleContext1 = m_felix.getBundleContext();
............
我还在我的 java 应用程序中部署 iPOJO 所需的包,如下所示:
//starting ipojo required bundles
Bundle coreBundle = bundleContext1.installBundle("file:C:\\Users\\zaid.almahmoud\\Dropbox\\EBTIC\\ADERE\\feasibility-codes\\ipojo\\ipojo-distribution-1.11.0\\bundle\\org.apache.felix.ipojo-1.11.0.jar");
coreBundle.start();
Bundle compositeBundle = bundleContext1.installBundle("file:C:\\Users\\zaid.almahmoud\\Dropbox\\EBTIC\\ADERE\\feasibility-codes\\ipojo\\ipojo-distribution-1.11.0\\bundle\\org.apache.felix.ipojo.composite-1.6.0.jar");
compositeBundle.start();
Bundle apiBundle = bundleContext1.installBundle("file:C:\\Users\\zaid.almahmoud\\Dropbox\\EBTIC\\ADERE\\feasibility-codes\\ipojo\\ipojo-distribution-1.11.0\\bundle\\org.apache.felix.ipojo.api-1.6.0.jar");
apiBundle.start();
下面是我的 java 应用程序类路径中 jar 的快照:
除了我的 java 应用程序之外,我还有一个包,我在其中使用 iPOJO API 创建了一个复合组件类型。我创建了这个组合并在我的 bundle Activator start 方法中创建了一个实例,如下所示:
public void start(BundleContext context) throws Exception {
CompositeComponentType type = new CompositeComponentType()
.setBundleContext(context)
.setComponentTypeName("comp1");
ComponentInstance ci = type.createInstance();
}
我的捆绑包的 MANIFEST.MF:
Manifest-Version: 1.0
Bundle-ManifestVersion: 2
Bundle-Name: Starter
Bundle-SymbolicName: starter
Bundle-Version: 1.0.0.qualifier
Bundle-Activator: starter.Activator
Bundle-RequiredExecutionEnvironment: JavaSE-1.6
Bundle-ClassPath: .,
org.apache.felix.ipojo-1.6.0.jar,
org.apache.felix.ipojo.api-1.6.0.jar,
org.apache.felix.ipojo.composite-1.6.0.jar
Export-Package: org.apache.felix.ipojo
Import-Package: org.osgi.framework, org.apache.felix.ipojo
我的捆绑类路径:
当我在我的 java 应用程序中安装并启动这个包时,我收到以下错误:
org.osgi.framework.BundleException: Activator start error in bundle starter...
Caused by: java.lang.LinkageError: loader constraint violation: when resolving overridden method "org.apache.felix.ipojo.composite.CompositeFactory.check(Lorg/apache/felix/ipojo/metadata/Element;)V" the class loader (instance of org/apache/felix/framework/BundleWiringImpl$BundleClassLoaderJava5) of the current class, org/apache/felix/ipojo/composite/CompositeFactory, and its superclass loader (instance of org/apache/felix/framework/BundleWiringImpl$BundleClassLoaderJava5), have different Class objects for the type y.check(Lorg/apache/felix/ipojo/metadata/Element;)V used in the signature
在以下行:
ComponentInstance ci = type.createInstance();
我在这里读到,当您在两个捆绑包中有两个相同的类时,可能会出现此错误。但我不知道这两个类可能在哪里。我怀疑org/apache/felix/ipojo/metadata/Element
,但我发现只有一堂课org.apache.felix.ipojo.
。除了在我的捆绑包中,我在其他任何地方都没有那个库。
你能帮忙吗?谢谢。