当尝试以Equinox方式编程安装一个bundle时，nullPointerException [英] nullPointerException when trying to programmatically install a bundle in Equinox

问题描述

我正在尝试一个简单的演示，我启动Equinox框架，然后加载创建的教程软件包（通过教程）。我继续得到 NullPointerExceptions 这里是堆栈跟踪...

 异常在线程mainjava.lang.NullPointerException 
在org.eclipse.osgi.internal.baseadaptor.BaseStorageHook.mapLocationToURLConnection（BaseStorageHook.java:372）
在org.eclipse.osgi.baseadaptor.BaseAdaptor。 mapLocationToURLConnection（BaseAdaptor.java:185）
在org.eclipse.osgi.framework.internal.core.Framework $ 1.run（Framework.java:835）
在java.security.AccessController.doPrivileged（Native方法）
在org.eclipse.osgi.framework.internal.core.Framework.installWorker（Framework.java:888）
在org.eclipse.osgi.framework.internal.core.Framework.installBundle（ Framework.java:832）
在org.eclipse.osgi.framework.internal.core.BundleContextImpl.installBundle（BundleContextImpl.java:167）
在org.eclipse.osgi.framework.internal.core。 BundleContextImpl.installBundle（BundleContextImpl.java:161）
在com.mydemo.bootstrap.Boot strap.main（Bootstrap.java:35）
  

这里是代码...

  public class Bootstrap 
 {
 
 public static void main（String [] args）throws BundleException，InterruptedException ，MalformedURLException 
 {
 
 //加载框架工厂
 ServiceLoader loader = ServiceLoader.load（FrameworkFactory.class）; 
 FrameworkFactory factory =（FrameworkFactory）loader.iterator（）.next（）; 
 
 //创建框架的新实例
 Framework framework = factory.newFramework（null）; 
 
 try 
 {
 //启动框架
 framework.start（）; 
 framework.init（）; 
 
 BundleContext bc = framework.getBundleContext（）; 
 bc.installBundle（file：/ c：/Users/kirk/Desktop/plugins/org.equinoxosgi.toast.client.emergency_1.0.0.201106290845.jar）; 
} 
 finally 
 {
 //停止框架
 framework.stop（）; 
 
 //等待框架完全停止
 framework.waitForStop（3000）; 
} 
} 
} 
  

解决方案

我很确定start（）和init（）应该是相反的顺序。

  //初始化框架
 framework.init（）; 
 
 //启动框架
 framework.start（）; 
  

I'm trying to do a simple demo where I start the Equinox Framework and then load a tutorial bundle that was created (via the tutorial). I keep getting NullPointerExceptions here is the stack trace...

Exception in thread "main" java.lang.NullPointerException
    at org.eclipse.osgi.internal.baseadaptor.BaseStorageHook.mapLocationToURLConnection(BaseStorageHook.java:372)
    at org.eclipse.osgi.baseadaptor.BaseAdaptor.mapLocationToURLConnection(BaseAdaptor.java:185)
    at org.eclipse.osgi.framework.internal.core.Framework$1.run(Framework.java:835)
    at java.security.AccessController.doPrivileged(Native Method)
    at org.eclipse.osgi.framework.internal.core.Framework.installWorker(Framework.java:888)
    at org.eclipse.osgi.framework.internal.core.Framework.installBundle(Framework.java:832)
    at org.eclipse.osgi.framework.internal.core.BundleContextImpl.installBundle(BundleContextImpl.java:167)
    at org.eclipse.osgi.framework.internal.core.BundleContextImpl.installBundle(BundleContextImpl.java:161)
    at com.mydemo.bootstrap.Bootstrap.main(Bootstrap.java:35)

here is the code ...

public class Bootstrap
{

public static void main( String[ ] args ) throws BundleException , InterruptedException , MalformedURLException
{

    // Load the framwork factory
    ServiceLoader loader = ServiceLoader.load( FrameworkFactory.class );
    FrameworkFactory factory = ( FrameworkFactory ) loader.iterator( ).next( );

    // Create a new instance of the framework
    Framework framework = factory.newFramework( null );

    try
    {
        // Start the framework
        framework.start( );
        framework.init( );

        BundleContext bc = framework.getBundleContext( );
        bc.installBundle( "file:/c:/Users/kirk/Desktop/plugins/org.equinoxosgi.toast.client.emergency_1.0.0.201106290845.jar" );
    }
    finally
    {
        // Stop the framework
        framework.stop( );

        // Wait for the framework to stop completely
        framework.waitForStop( 3000 );
    }
}
}

解决方案

I am pretty sure that start() and init() should be in the opposite order.

// Initialize the framework
framework.init( );

// Start the framework
framework.start( );

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